// Aegis — multi-chain wallet bundled with Theseus. activate() runs in the
// main process; every wallet's key material lives here, in memory, and is
// re-derived from the password vault on every launch. Nothing secret is ever
// written to disk or logged.
//
// A single addon can hold many wallets — one per {chain, network}, or several
// sub-accounts of the same chain — and each wallet is backed by its own
// vault-derived 32-byte HKDF root. Chains today: BCH, Tron mainnet, Tron
// Nile testnet. Adding a fourth chain is a new adapter file under lib/ and
// an entry in the CHAIN_REGISTRY below.
//
// Back-compat: the addon id stays "bchwallet" (the manifest label became
// Aegis, but the id gates the vault-derive namespace and older vaults have
// funds against it). The legacy BCH default wallet uses purpose
// "bchwallet/mainnet/0" — byte-identical to the pre-multi-wallet build —
// so on-disk funds are untouched. See memory bchwallet-vault-root-derivation.
const path = require("node:path");
const fs = require("node:fs");

const LEGACY_BCH_PURPOSE = "bchwallet/mainnet/0";

// New each time the add-on's main process starts, i.e. once per Theseus
// launch. Comparing it against the id stored the last time a PIN was
// accepted is how "ask again after a browser restart" is detected — a
// timestamp cannot tell a restart from a long idle, and the panel cannot be
// trusted to report its own restarts.
const BOOT_ID = require("node:crypto").randomBytes(8).toString("hex");
const PIN_INTERVAL_MS = 6 * 60 * 60 * 1000;
const LEGACY_BCH_WALLET_ID = "bch-default";

let ctx = null;

// ---- deps -------------------------------------------------------------------

async function loadDeps(api) {
  const { secp256k1 } = await api.import("@noble/curves/secp256k1.js");
  const { ed25519 } = await api.import("@noble/curves/ed25519.js");
  const { sha256, sha512 } = await api.import("@noble/hashes/sha2.js");
  const { hkdf } = await api.import("@noble/hashes/hkdf.js");
  // For DigiByte's legacy master-key derivation — see HMAC_DIGIBYTE_SEED in
  // lib/dgb/core/hd.js.
  const { hmac } = await api.import("@noble/hashes/hmac.js");
  const { ripemd160 } = await api.import("@noble/hashes/legacy.js");
  const { keccak_256 } = await api.import("@noble/hashes/sha3.js");
  const { blake2b } = await api.import("@noble/hashes/blake2.js");
  const { HDKey } = await api.import("@scure/bip32");
  const WebSocket = api.require("ws");
  const cashaddr = require("./lib/cashaddr.js");
  const keysLib = require("./lib/keys.js")({ HDKey, secp256k1, sha256, ripemd160, cashaddr });
  const tx = require("./lib/tx.js")({ sha256 });
  const electrum = require("./lib/electrum.js")({ WebSocket, log: (...a) => api.log("electrum", ...a) });
  const base58check = require("./lib/base58check.js")({ sha256 });
  const bchAdapter = require("./lib/chain-bch.js")({
    HDKey, secp256k1, sha256, ripemd160, cashaddr, keysLib, tx, electrum, WebSocket,
  });
  const tronAdapter = require("./lib/chain-tron.js")({
    HDKey, secp256k1, sha256, keccak_256, base58check,
  });
  const siaAdapter = require("./lib/chain-sia.js")({ ed25519, blake2b });
  const ethAdapter = require("./lib/chain-eth.js")({ HDKey, secp256k1, keccak_256 });
  const eip712 = require("./lib/eip712.js")({ keccak_256 });
  // Tron raw_data_hex decoder — the approval overlay for dapp-built Tron
  // transactions is built from these bytes, never from the dapp's JSON.
  const tronDecode = require("./lib/tron-decode.js")({ sha256, base58check });
  // Solana uses the raw base58 alphabet (no checksum), which lives inside
  // base58check as encodeBase58 / decodeBase58 — expose them under a
  // `{encode, decode}` shape the SOL adapter reads from.
  const solBase58 = { encode: base58check.encodeBase58, decode: base58check.decodeBase58 };
  const solAdapter = require("./lib/chain-sol.js")({ ed25519, base58: solBase58, sha256 });
  // DGB delegates address derivation + PSBT to the vendored @dgb-wallet/*
  // packages under lib/dgb/. Those are ESM; the peer deps (bitcoinjs-lib,
  // bip32, ecpair, @bitcoinerlab/secp256k1) are CommonJS and reachable via
  // api.require from the Theseus dependency tree.
  const { pathToFileURL } = require("node:url");
  // DGB's bundled ESM packages import their peer deps by bare specifier
  // ("bip32", "bitcoinjs-lib", …). When aegis is loaded from a copy in
  // userData/addons/, Node's ESM resolver can't reach Theseus's node_modules
  // from that path — so the import throws. Wrap it: DGB just becomes
  // unavailable, the rest of Aegis keeps working.
  const bitcoinjs = api.require("bitcoinjs-lib");
  const { BIP32Factory } = api.require("bip32");
  const { ECPairFactory } = api.require("ecpair");
  const ecc = api.require("@bitcoinerlab/secp256k1");

  let dgbCore = null, dgbPsbt = null, dgbAdapter = null;
  try {
    // Inject before importing anything under lib/dgb/. Those modules used to
    // import "bitcoinjs-lib" and friends as bare specifiers, which only
    // resolves when the add-on sits inside the app tree — so DigiByte worked
    // on a fresh install and vanished after the first OTA update, where Aegis
    // runs from <userData>/extensions/aegis/. See lib/dgb/deps.js.
    const dgbDeps = await import(pathToFileURL(path.join(api.folder, "lib/dgb/deps.js")).href);
    dgbDeps.setDgbDeps({
      bitcoinjs, ecc,
      bip32Factory: BIP32Factory,
      ecpairFactory: ECPairFactory,
      bip39: api.require("bip39"),
      hmac, sha512,
    });
    dgbCore = await import(pathToFileURL(path.join(api.folder, "lib/dgb/core/index.js")).href);
    dgbPsbt = await import(pathToFileURL(path.join(api.folder, "lib/dgb/psbt/index.js")).href);
  } catch (e) {
    api.log("dgb unavailable:", e?.message || e);
  }
  if (dgbCore && dgbPsbt) {
    dgbAdapter = require("./lib/chain-dgb.js")({
      dgbCore, dgbPsbt, bitcoinjs,
      bip32Factory: BIP32Factory, ecpairFactory: ECPairFactory, ecc,
      sha256, electrum,
    });
  }
  const btcAdapter = require("./lib/chain-btc.js")({
    bitcoinjs, bip32Factory: BIP32Factory, ecpairFactory: ECPairFactory, ecc,
    sha256, electrum,
  });
  const bip39 = api.require("bip39");
  // Imported BCH — a lean read-only adapter for wallets whose key material
  // lives in Theseus's wallet-imports.enc. Same electrum/cashaddr surface as
  // the primary BCH adapter but a single fixed address per wallet.
  const importedBchAdapter = require("./lib/chain-bch-imported.js")({
    sha256, ripemd160, cashaddr, electrum, WebSocket, tx,
    HDKey, secp256k1, base58check, vaultImports: api.vault && api.vault.imports,
  });
  // Multi-chain imported adapters. UTXO chains (BTC, DGB) share an electrum-
  // based reader; account-model chains (ETH, TRX, SOL) share a JSON-RPC
  // reader. Every runtime is read-only in M.1b, matching chain-bch-imported.
  const utxoImportedAdapter = require("./lib/chain-utxo-imported.js")({
    sha256, bitcoinjs, dgbCore, electrum, WebSocket,
  });
  const genericImportedAdapter = require("./lib/chain-generic-imported.js")();
  // Per-chain address derivation from raw material (mnemonic + path or
  // chain-native private key). Used by the importWallet handler to compute
  // the address client-side before wallet-imports.enc stores the material.
  const derive = require("./lib/import-derive.js")({
    HDKey, secp256k1, ed25519, sha256, sha512, hmac, ripemd160, keccak_256, blake2b,
    cashaddr, base58check, bitcoinjs, bip32Factory: BIP32Factory,
    ecpairFactory: ECPairFactory, ecc, bip39, dgbCore,
  });
  // WizardConnect: LGPL-3.0-or-later. Dynamic-linked via api.import so the
  // §4d combined-work requirement (dynamic linkage + license notice + source
  // availability) is met — package sources ship with npm.
  const wcCore = await api.import("@wizardconnect/core");
  const wcWallet = await api.import("@wizardconnect/wallet");
  const libauth = await api.import("@bitauth/libauth");
  return { HDKey, secp256k1, ed25519, sha256, hkdf, ripemd160, keccak_256, blake2b,
    cashaddr, keysLib, tx, electrum, base58check,
    bchAdapter, tronAdapter, siaAdapter, dgbAdapter, ethAdapter, solAdapter, btcAdapter,
    importedBchAdapter, utxoImportedAdapter, genericImportedAdapter,
    derive, bip39,
    dgbCore, dgbPsbt, bitcoinjs, ecc, eip712, tronDecode,
    wcCore, wcWallet, libauth };
}

// ---- servers ---------------------------------------------------------------

function bchDefaultServers(api) {
  try { return JSON.parse(fs.readFileSync(path.join(api.folder, "electrum-servers.json"), "utf8")); }
  catch { return []; }
}
function bchServerList(api) {
  const custom = api.storage.get("servers", null);
  return Array.isArray(custom) && custom.length ? custom : bchDefaultServers(api);
}

// ---- chain registry --------------------------------------------------------
// Two-level structure so the panel can present coin-then-network as separate
// picks. `coin` fields are chain-wide; `networks[<id>]` fields override or
// add to them per-network. `logo` is the SVG key panel.js draws from.
const COINS = {
  bch: {
    chain: "bch",
    label: "Bitcoin Cash",
    short: "BCH",
    ticker: "BCH",
    decimals: 8,
    color: "#0ac18e",
    logo: "bch",
    supportsMessageSign: true,
    supportsPageInject: true,               // window.bitcoincash on *.x pages
    networks: {
      mainnet: {
        id: "mainnet", label: "Mainnet", testnet: false,
        // Legacy default wallet uses the flat "bchwallet/mainnet/0" purpose;
        // new BCH mainnet sub-accounts start at index 1 under the /bch/ prefix.
        purposePrefix: "bchwallet/bch/",
        startIndex: 1,
      },
      chipnet: {
        id: "chipnet", label: "Chipnet testnet", testnet: true,
        purposePrefix: "bchwallet/bch/chipnet/",
        startIndex: 0,
      },
    },
  },
  trx: {
    chain: "trx",
    label: "Tron",
    short: "TRX",
    ticker: "TRX",
    decimals: 6,
    color: "#ff060a",
    logo: "trx",
    supportsMessageSign: true,
    supportsPageInject: true,               // window.tronWeb everywhere
    networks: {
      mainnet: {
        id: "mainnet", label: "Mainnet", testnet: false,
        purposePrefix: "bchwallet/trx/mainnet/", startIndex: 0,
      },
      nile: {
        id: "nile", label: "Nile testnet", testnet: true,
        purposePrefix: "bchwallet/trx/nile/", startIndex: 0,
      },
    },
  },
  sc: {
    chain: "sc",
    label: "Siacoin",
    short: "SC",
    ticker: "SC",
    decimals: 24,
    color: "#20be82",
    logo: "sc",
    supportsMessageSign: true,
    supportsPageInject: false,
    // First SC wallet in Aegis reuses the legacy standalone-siawallet purpose
    // so pre-Aegis funds carry over automatically (addon.json declares
    // `absorbs: ["siawallet"]` to allow the derivation). Second+ use the new
    // Aegis-namespaced prefix.
    networks: {
      mainnet: {
        id: "mainnet", label: "Mainnet", testnet: false,
        purposePrefix: "bchwallet/sc/mainnet/", startIndex: 1,
        legacyFirstPurpose: "siawallet/mainnet/0",
      },
    },
  },
  dgb: {
    chain: "dgb",
    label: "DigiByte",
    short: "DGB",
    ticker: "DGB",
    decimals: 8,
    color: "#0066cc",
    logo: "dgb",
    supportsMessageSign: true,
    supportsPageInject: false,
    // BIP44/49/84/86 address families — the picker lives in the DGB
    // settings block. Default is BIP84 (dgb1q…), which matches modern
    // DGB Core, DigiByte-Go, and the SilentCode web-wallet. `coinType`
    // per chain feeds the path builder below.
    addressFamilies: [
      { id: "bip84", purpose: 84, label: "Native SegWit (dgb1q…)" },
      { id: "bip86", purpose: 86, label: "Taproot (dgb1p…)" },
      { id: "bip49", purpose: 49, label: "Wrapped SegWit (S…)" },
      { id: "bip44", purpose: 44, label: "Legacy P2PKH (D…)" },
    ],
    coinType: 20,
    defaultPurpose: 84,
    networks: {
      mainnet: {
        id: "mainnet", label: "Mainnet", testnet: false,
        purposePrefix: "bchwallet/dgb/mainnet/", startIndex: 0,
      },
    },
  },
  eth: {
    chain: "eth",
    label: "Ethereum",
    short: "ETH",
    ticker: "ETH",
    decimals: 18,
    color: "#627eea",
    logo: "eth",
    supportsMessageSign: true,
    supportsPageInject: false,          // EIP-1193 provider is a follow-up
    networks: {
      mainnet: {
        id: "mainnet", label: "Mainnet", testnet: false,
        purposePrefix: "bchwallet/eth/mainnet/", startIndex: 0,
      },
      sepolia: {
        id: "sepolia", label: "Sepolia testnet", testnet: true,
        purposePrefix: "bchwallet/eth/sepolia/", startIndex: 0,
      },
    },
  },
  sol: {
    chain: "sol",
    label: "Solana",
    short: "SOL",
    ticker: "SOL",
    decimals: 9,
    color: "#9945ff",
    logo: "sol",
    supportsMessageSign: true,
    supportsPageInject: false,
    networks: {
      mainnet: {
        id: "mainnet", label: "Mainnet-beta", testnet: false,
        purposePrefix: "bchwallet/sol/mainnet/", startIndex: 0,
      },
      devnet: {
        id: "devnet", label: "Devnet", testnet: true,
        purposePrefix: "bchwallet/sol/devnet/", startIndex: 0,
      },
    },
  },
  btc: {
    chain: "btc",
    label: "Bitcoin",
    short: "BTC",
    ticker: "BTC",
    decimals: 8,
    color: "#f7931a",
    logo: "btc",
    supportsMessageSign: true,
    supportsPageInject: false,
    // BIP44/49/84/86 across bc1q… / bc1p… / 3… / 1… on mainnet and
    // tb1q… / tb1p… / 2… / m/n… on testnet3 + signet. Coin type shifts
    // per network (0 for mainnet, 1 for both testnet3 and signet — SLIP-44
    // treats every Bitcoin testnet as coin type 1).
    addressFamilies: [
      { id: "bip84", purpose: 84, label: "Native SegWit (bc1q… / tb1q…)" },
      { id: "bip86", purpose: 86, label: "Taproot (bc1p… / tb1p…)" },
      { id: "bip49", purpose: 49, label: "Wrapped SegWit (3… / 2…)" },
      { id: "bip44", purpose: 44, label: "Legacy P2PKH (1… / m…, n…)" },
    ],
    coinType: { mainnet: 0, testnet: 1, signet: 1 },
    defaultPurpose: 84,
    networks: {
      mainnet: {
        id: "mainnet", label: "Mainnet", testnet: false,
        purposePrefix: "bchwallet/btc/mainnet/", startIndex: 0,
      },
      testnet: {
        id: "testnet", label: "Testnet3", testnet: true,
        purposePrefix: "bchwallet/btc/testnet/", startIndex: 0,
      },
      signet: {
        id: "signet", label: "Signet", testnet: true,
        purposePrefix: "bchwallet/btc/signet/", startIndex: 0,
      },
    },
  },
};
function chainKey(chain, network) { return `${chain}:${network}`; }
// Coin type per (chain, network). A number literal on the COINS entry
// (DGB uses a single 20) or a per-network object ({mainnet: 0, testnet: 1}
// for BTC). Returns null when the chain doesn't declare a family picker.
function coinTypeFor(c, network) {
  if (!c || c.coinType == null) return null;
  return typeof c.coinType === "number" ? c.coinType : (c.coinType[network] ?? null);
}
// Full derivation paths per family for a given (chain, network) — expands
// the family list on the fly so each picker knows exactly which path a
// pick would produce.
function addressFamiliesFor(c, network) {
  if (!c || !c.addressFamilies) return null;
  const ct = coinTypeFor(c, network);
  if (ct == null) return c.addressFamilies;
  return c.addressFamilies.map((f) => ({
    ...f,
    defaultAccountPath: `m/${f.purpose}'/${ct}'/0'`,
  }));
}
function defaultAccountPathFor(c, network) {
  const ct = coinTypeFor(c, network);
  if (ct == null || c.defaultPurpose == null) return null;
  return `m/${c.defaultPurpose}'/${ct}'/0'`;
}
// Custom EVM chains (EIP-3085) live in api.storage under `customEthChains`.
// Structured as { [chainId]: {chainId, chainName, rpcUrl, explorerTx,
// explorerAddr, ticker, addedAt, addedByOrigin} }. They're not in COINS at
// module-load time — we synthesize a chainMeta / mount entry from storage
// so wallet_addEthereumChain can register new networks at runtime without
// a Theseus restart.
const CUSTOM_ETH_PREFIX = "custom-";
function customEthChains(api) {
  const raw = api.storage.get("customEthChains", {});
  return raw && typeof raw === "object" ? raw : {};
}
function customEthNetworkEntry(api, network) {
  if (!network || !network.startsWith(CUSTOM_ETH_PREFIX)) return null;
  const chainId = Number(network.slice(CUSTOM_ETH_PREFIX.length));
  if (!Number.isFinite(chainId)) return null;
  const all = customEthChains(api);
  const cfg = all[String(chainId)];
  if (!cfg) return null;
  return {
    id: network,
    label: cfg.chainName || `EVM #${chainId}`,
    chainId,
    defaultRpc: cfg.rpcUrl,
    explorerTx: cfg.explorerTx,
    explorerAddr: cfg.explorerAddr,
    ticker: cfg.ticker || "ETH",
    faucet: null,
  };
}
function chainMeta(chain, network) {
  // ETH custom-network fallback for EIP-3085 chains.
  if (chain === "eth" && String(network || "").startsWith(CUSTOM_ETH_PREFIX)) {
    const cfg = customEthNetworkEntry(ctx?.api, network);
    if (!cfg) return null;
    return {
      chain: "eth", network: cfg.id,
      label: "Ethereum · " + cfg.label,
      short: cfg.ticker, ticker: cfg.ticker, decimals: 18,
      color: COINS.eth.color, logo: COINS.eth.logo,
      coinLabel: cfg.label, networkLabel: `chainId ${cfg.chainId}`,
      testnet: false,
      purposePrefix: `bchwallet/eth/${cfg.id}/`, startIndex: 0,
      supportsMessageSign: true, supportsPageInject: false,
      addressFamilies: null, defaultAccountPath: null,
      isCustom: true, chainId: cfg.chainId,
    };
  }
  const c = COINS[chain]; const n = c && c.networks[network];
  if (!c || !n) return null;
  return {
    chain: c.chain, network: n.id,
    label: c.label + " · " + n.label, short: c.short, ticker: c.ticker, decimals: c.decimals,
    color: c.color, logo: c.logo, coinLabel: c.label, networkLabel: n.label, testnet: !!n.testnet,
    purposePrefix: n.purposePrefix, startIndex: n.startIndex,
    supportsMessageSign: !!c.supportsMessageSign, supportsPageInject: !!c.supportsPageInject,
    addressFamilies: addressFamiliesFor(c, network),
    defaultAccountPath: defaultAccountPathFor(c, network),
  };
}
function coinsForPanel() {
  return Object.values(COINS).map((c) => ({
    chain: c.chain, label: c.label, short: c.short, ticker: c.ticker, color: c.color, logo: c.logo, decimals: c.decimals,
    networks: Object.values(c.networks).map((n) => ({ id: n.id, label: n.label, testnet: !!n.testnet })),
  }));
}

// ---- wallet list ------------------------------------------------------------

// Replace api.storage with a write-through read cache. Writes still go to the
// host so nothing changes about durability or who owns the file; only the
// repeated parsing of it disappears. Falls back to the host's storage
// untouched if the api object will not accept the substitution.
function installStorageCache(api, onSet) {
  const raw = api.storage;
  if (!raw || typeof raw.all !== "function") return false;
  let mem = null;
  const load = () => {
    if (!mem) { try { mem = raw.all() || {}; } catch { mem = {}; } }
    return mem;
  };
  const cached = {
    get: (key, fallback = null) => {
      const s = load();
      return Object.prototype.hasOwnProperty.call(s, key) ? s[key] : fallback;
    },
    set: (key, value) => {
      load()[key] = value;
      raw.set(key, value);
      if (onSet) try { onSet(key); } catch {}
    },
    all: () => ({ ...load() }),
  };
  try {
    api.storage = cached;
    return api.storage === cached;
  } catch { return false; }
}

// Aegis starts on first use (addon.json "activation": "on-demand"). Two
// things only work while it runs, so while either is on it asks the host to
// start it at launch: a live WizardConnect pairing (nobody else listens on
// the relays for the dapp's sign requests) and "stay unlocked" (that
// auto-unlock also opens Settings › Passwords). Pairings of a removed wallet
// stay in storage, so only wallets still in the list count.
function needsLaunchStart(api) {
  const ids = new Set((readWallets(api) || []).map((w) => w.id));
  const all = api.storage.all ? api.storage.all() : {};
  for (const [k, v] of Object.entries(all)) {
    const m = /^wc\/(.+)\/uris$/.exec(k);
    if (m && ids.has(m[1]) && Array.isArray(v) && v.length) return true;
  }
  const cfg = api.storage.get("aegis/session/cfg", null);
  const blob = api.storage.get("aegis/session/enc", null);
  return !!(cfg && cfg.lockOnClose === false && blob && blob.encPwB64);
}
let launchStartAsked = null;
function syncLaunchStart(api) {
  if (typeof api.startAtLaunch !== "function") return;   // host predates on-demand
  const on = needsLaunchStart(api);
  if (on === launchStartAsked) return;
  launchStartAsked = on;
  try { api.startAtLaunch(on); } catch (e) { api.log("startAtLaunch:", e?.message || e); }
}
const LAUNCH_START_KEYS = /^(wallets$|wc\/|aegis\/session\/)/;

function readWallets(api) {
  const raw = api.storage.get("wallets", null);
  return Array.isArray(raw) ? raw : null;
}
function writeWallets(api, list) { api.storage.set("wallets", list); }

// Bring pre-multi-wallet storage forward: create the legacy BCH default entry
// and rehome its receiveCursor / txCache under the new per-wallet subkey.
function migrateLegacyStorage(api) {
  if (readWallets(api)) return;                        // already multi-wallet
  const legacyAccountPath = String(api.storage.get("accountPath", "") || "").trim() || "m/44'/145'/0'";
  const wallets = [{
    id: LEGACY_BCH_WALLET_ID,
    label: "BCH — main",
    chain: "bch",
    network: "mainnet",
    purpose: LEGACY_BCH_PURPOSE,
    accountPath: legacyAccountPath,
    isDefault: true,
    isLegacy: true,
    createdAt: 0,
  }];
  writeWallets(api, wallets);
  api.storage.set("selectedWalletId", LEGACY_BCH_WALLET_ID);
  // Move per-wallet state under the scoped prefix used by chain-bch.js.
  const prefix = `wallets/${LEGACY_BCH_WALLET_ID}/`;
  for (const legacyKey of ["receiveCursor", "txCache"]) {
    const v = api.storage.get(legacyKey, null);
    if (v !== null && api.storage.get(prefix + legacyKey, null) === null) {
      api.storage.set(prefix + legacyKey, v);
    }
  }
  api.log("migrated legacy BCH wallet into multi-wallet layout");
}

// The lowest index not in use. It used to be highest + 1, so removing a
// wallet retired its index for good: the keys were still derivable from the
// vault, but nothing in the UI could ever produce that wallet again, and
// whatever was on it was out of reach. Now "Add wallet" after a removal
// brings the same wallet (same keys, same address) back.
function nextIndex(wallets, meta) {
  const used = new Set();
  for (const w of wallets) {
    if (chainKey(w.chain, w.network) !== chainKey(meta.chain, meta.network)) continue;
    if (w.isLegacy) continue;
    const m = /\/(\d+)$/.exec(w.purpose || "");
    const n = m ? Number(m[1]) : NaN;
    if (Number.isFinite(n)) used.add(n);
  }
  let i = meta.startIndex;
  while (used.has(i)) i++;
  return i;
}

function makeWalletId(meta, index) {
  const n = String(meta.network).replace(/[^a-z0-9]/gi, "");
  return `${meta.chain}-${n}-${index}`;
}

function autoLabel(meta, wallets) {
  const same = wallets.filter((w) => chainKey(w.chain, w.network) === chainKey(meta.chain, meta.network));
  if (!same.length) return meta.short;
  return `${meta.short} #${same.length + 1}`;
}

// ---- runtime wallet map -----------------------------------------------------
// A "runtime" is a mounted wallet: its adapter instance plus phase + error.
// activate() derives all of them in parallel once the vault unlocks.

async function mountAllWallets() {
  const c = ctx;
  const walletList = readWallets(c.api) || [];
  for (const w of walletList) {
    if (!c.runtimes.has(w.id)) c.runtimes.set(w.id, { entry: w, phase: "locked", error: null, adapter: null });
  }
  emitState();
  await Promise.all(walletList.map((w) => mountWallet(w)));
}

// An import stores the FULL leaf path the user typed (m/44'/1'/0'/0/0) in
// entry.accountPath, because that is what derived the single address the
// strip shows. WizardConnect wants the BIP44 *account* node instead — it
// appends the branch (receive/change/defi) and the address index itself.
// Handing it the leaf made it derive m/44'/1'/0'/0/0/<branch>/<i>: a tree
// the user holds no keys in, so pairing looked healthy and then every sign
// request failed with "no path for input". The account level is the last
// hardened element of the path.
function wcAccountPath(path) {
  const p = String(path || "").trim();
  if (!/^m(\/\d+'?)+$/.test(p)) return null;
  const parts = p.split("/");
  let last = -1;
  for (let i = 1; i < parts.length; i++) if (parts[i].endsWith("'")) last = i;
  if (last < 1) return null;
  return parts.slice(0, last + 1).join("/");
}

async function mountWallet(entry) {
  const c = ctx;
  const rt = c.runtimes.get(entry.id) || { entry, phase: "locked", error: null, adapter: null };
  rt.entry = entry;
  rt.phase = "locked"; rt.error = null;
  c.runtimes.set(entry.id, rt);
  emitState();

  // Imported wallets skip the vault-derive/HKDF path entirely: their signer
  // material is in wallet-imports.enc, and the runtime here is read-only so
  // it doesn't need the material until spend support ships (M.1b).
  if (entry.kind === "imported") {
    try {
      let adapter;
      const commonOpts = {
        walletId: entry.id, storage: c.api.storage,
        log: (...a) => c.api.log(`[${entry.id}]`, ...a),
        onChange: () => emitStateForWallet(entry.id),
        network: entry.network,
      };
      if (entry.chain === "bch") {
        // A seed import IS an HD wallet. Bitcoin.com, Electron Cash and the
        // rest spread funds across a whole BIP44 account, so watching the one
        // address a leaf path happens to derive reports 0 for a wallet that
        // plainly has money in it. Mount the seed on the same adapter the
        // vault-derived wallets use — WalletKeys walks receive AND change to
        // a gap limit of 20, which is what actually finds the balance, and it
        // brings real spend support with it.
        //
        // WIF imports stay on the single-address adapter: one key is one
        // address, and there is nothing to scan.
        //
        // Reading the signer needs the vault unlocked. When it is locked we
        // fall back to the watch-only adapter so balances still render from
        // the stored address instead of the wallet failing to mount at all.
        let seedRoot = null;
        try {
          const blob = await c.api.vault.imports.signer(entry.importId);
          if (ctx !== c) return;
          if (blob && blob.kind === "seed" && blob.seed) {
            const seedHex = String(blob.seed).trim();
            if (/^[0-9a-f]+$/i.test(seedHex) && seedHex.length >= 32) {
              seedRoot = new Uint8Array(seedHex.match(/../g).map((x) => parseInt(x, 16)));
            } else {
              wcIneligible.set(entry.id, {
                short: "unsupported key",
                detail: "Imported seed material is not in a form WizardConnect can derive from.",
              });
            }
          } else {
            wcIneligible.set(entry.id, {
              short: "WIF import",
              detail: "Wallets imported from a single private key (WIF) can't pair. WizardConnect hands the dapp an xpub so it can derive addresses on its own, and a lone private key carries no chain code to build one from. Open this wallet's ⋯ menu and choose \"Promote to HD wallet\" — Aegis derives a proper wallet from your vault and sweeps this key into it.",
            });
          }
        } catch (e) {
          c.api.log(`[${entry.id}] signer unavailable:`, e?.message || e);
          wcIneligible.set(entry.id, wcErrReason(e));
        }

        const bchServers = entry.network === "mainnet" ? bchServerList(c.api) : undefined;
        if (seedRoot) {
          // entry.accountPath arrives in either shape: imports used to store
          // the full leaf the displayed address came from
          // (m/44'/145'/0'/0/0), while a Copay / Bitcoin.com backup QR
          // carries the ACCOUNT path. Trim both to the account — the last
          // hardened element — so WalletKeys derives the branches the wallet
          // actually used rather than a tree hanging off a leaf.
          adapter = new c.d.bchAdapter.BchWallet(seedRoot, {
            ...commonOpts,
            servers: bchServers,
            accountPath: wcAccountPath(entry.accountPath) || undefined,
          });
        } else {
          adapter = new c.d.importedBchAdapter.ImportedBchWallet({
            ...commonOpts,
            cashaddr: entry.importedCashaddr || entry.importedAddress,
            servers: bchServers,
            importId: entry.importId,
          });
          adapter.schedulePoll(20_000);
        }

        // Imported BCH wallets were never registered with WizardConnect —
        // startForWallet only ran in the vault-derived branch, so they showed
        // up in the "Sign with" picker and then failed on pair with "no
        // manager". Register the seed-backed ones here too.
        if (c.wc && seedRoot) {
          c.wc.startForWallet({
            walletId: entry.id, label: entry.label,
            // Its own copy: the WC adapter keeps a live reference for the
            // per-URI relay-identity HKDF, so it must not share the buffer
            // we are about to wipe.
            root32: new Uint8Array(seedRoot),
            accountPath: wcAccountPath(entry.accountPath) || adapter.snapshot?.()?.accountPath || "m/44'/145'/0'",
          }).catch((e) => {
            c.api.log(`[${entry.id}] wc start (imported):`, e?.message || e);
            wcIneligible.set(entry.id, wcErrReason(e));
            emitStateForWallet(entry.id);
          });
        }
        // BchWallet copied the root and WalletKeys already derived from it,
        // so the local buffer has no further use.
        if (seedRoot) { try { seedRoot.fill(0); } catch {} }
      } else if (entry.chain === "btc" || entry.chain === "dgb") {
        adapter = new c.d.utxoImportedAdapter.UtxoImportedWallet({
          ...commonOpts, chain: entry.chain, address: entry.importedAddress,
        });
        adapter.schedulePoll(20_000);
      } else if (entry.chain === "eth" || entry.chain === "trx" || entry.chain === "sol") {
        adapter = new c.d.genericImportedAdapter.GenericImportedWallet({
          ...commonOpts, chain: entry.chain, address: entry.importedAddress,
          // Only a real custom URL overrides the network default. The old
          // String(x || undefined) turned an unset override into the text
          // "undefined", which is truthy — so every imported TRX/ETH/SOL wallet
          // without a custom RPC fetched "undefined/v1/accounts/…" and showed
          // "undefined" as its server.
          rpcUrl: String(c.api.storage.get(`wallets/${entry.id}/rpcUrl`, "") || "").trim() || undefined,
        });
        adapter.schedulePoll(20_000);
      } else if (entry.chain === "sc") {
        // Sia's SiaWallet needs the 32-byte root at mount time — its key
        // tree derives eagerly. Fetch the signer material from the vault
        // (this branch runs only while the vault is unlocked; a locked
        // vault would surface at import-time and gate the flow there).
        // Falls back to a read-only stub if the fetch fails so a stray
        // locked mount doesn't break panel rendering.
        if (!c.api.vault?.imports || typeof c.api.vault.imports.signer !== "function") {
          throw new Error("vault.imports.signer unavailable — cannot mount Sia import");
        }
        const signerBlob = await c.api.vault.imports.signer(entry.importId);
        if (!signerBlob || signerBlob.kind !== "seed" || !signerBlob.seed) {
          throw new Error("Sia signer material missing or malformed");
        }
        const seedHex = String(signerBlob.seed).trim();
        if (!/^[0-9a-f]{64}$/i.test(seedHex)) throw new Error("Sia seed must be 32 bytes");
        const rootBytes = new Uint8Array(seedHex.match(/../g).map((x) => parseInt(x, 16)));
        const walletdUrl = String(c.api.storage.get(`wallets/${entry.id}/walletdUrl`, "") || "");
        adapter = new c.d.siaAdapter.SiaWallet(rootBytes, {
          walletId: entry.id,
          storage: c.api.storage,
          log: (...a) => c.api.log(`[${entry.id}]`, ...a),
          onChange: () => emitStateForWallet(entry.id),
          walletdUrl,
        });
        if (walletdUrl && typeof adapter.startPolling === "function") adapter.startPolling();
      } else {
        throw new Error(`no imported adapter for chain "${entry.chain}"`);
      }
      rt.adapter = adapter; rt.phase = "ready";
      adapter.refresh(true).catch((e) => c.api.log(`[${entry.id}] initial refresh:`, e?.message || e));
      emitStateForWallet(entry.id);
    } catch (e) {
      rt.phase = "error"; rt.error = e?.message || String(e);
      emitState();
    }
    return;
  }

  let root;
  try {
    root = await c.api.vault.derive(entry.purpose);
  } catch (e) {
    const msg = e?.message || String(e);
    rt.phase = /not set up/i.test(msg) ? "nosetup" : "error";
    rt.error = msg;
    emitState();
    return;
  }
  if (ctx !== c) return;
  try {
    let adapter;
    if (entry.chain === "bch") {
      // Mainnet still honors the user-set custom electrum list; chipnet uses
      // adapter-embedded defaults (no per-network custom list in this rev).
      const servers = entry.network === "mainnet" ? bchServerList(c.api) : undefined;
      adapter = new c.d.bchAdapter.BchWallet(root, {
        walletId: entry.id,
        storage: c.api.storage,
        log: (...a) => c.api.log(`[${entry.id}]`, ...a),
        onChange: () => emitStateForWallet(entry.id),
        network: entry.network,
        servers,
        accountPath: entry.accountPath,
      });
    } else if (entry.chain === "trx") {
      adapter = new c.d.tronAdapter.TronWallet(root, entry.network, {
        storage: c.api.storage,
        log: (...a) => c.api.log(`[${entry.id}]`, ...a),
        onChange: () => emitStateForWallet(entry.id),
      });
      adapter.schedulePoll(20_000);
    } else if (entry.chain === "sc") {
      // walletdUrl is per-Sia-wallet (each sub-account may point at a
      // different node) and stored under the scoped wallets/<id>/walletdUrl
      // key. Empty = the panel shows a "point me at walletd" gate.
      const walletdUrl = String(c.api.storage.get(`wallets/${entry.id}/walletdUrl`, "") || "");
      adapter = new c.d.siaAdapter.SiaWallet(root, {
        walletId: entry.id,
        storage: c.api.storage,
        log: (...a) => c.api.log(`[${entry.id}]`, ...a),
        onChange: () => emitStateForWallet(entry.id),
        walletdUrl,
      });
      if (walletdUrl) adapter.startPolling();
    } else if (entry.chain === "dgb") {
      if (!c.d.dgbAdapter) throw new Error("DGB unavailable (bundled ESM couldn't resolve peer deps)");
      adapter = new c.d.dgbAdapter.DgbWallet(root, {
        walletId: entry.id,
        storage: c.api.storage,
        log: (...a) => c.api.log(`[${entry.id}]`, ...a),
        onChange: () => emitStateForWallet(entry.id),
        accountPath: entry.accountPath,
      });
    } else if (entry.chain === "eth") {
      const rpcUrl = String(c.api.storage.get(`wallets/${entry.id}/rpcUrl`, "") || "");
      // Custom EIP-3085 chains resolve their config from storage rather than
      // the built-in NETWORKS map.
      const customNetwork = customEthNetworkEntry(c.api, entry.network);
      adapter = new c.d.ethAdapter.EthWallet(root, entry.network, {
        walletId: entry.id,
        storage: c.api.storage,
        log: (...a) => c.api.log(`[${entry.id}]`, ...a),
        onChange: () => emitStateForWallet(entry.id),
        rpcUrl,
        customNetwork,
      });
      adapter.schedulePoll(20_000);
    } else if (entry.chain === "sol") {
      const rpcUrl = String(c.api.storage.get(`wallets/${entry.id}/rpcUrl`, "") || "");
      adapter = new c.d.solAdapter.SolWallet(root, entry.network, {
        walletId: entry.id,
        storage: c.api.storage,
        log: (...a) => c.api.log(`[${entry.id}]`, ...a),
        onChange: () => emitStateForWallet(entry.id),
        rpcUrl,
      });
      adapter.schedulePoll(20_000);
    } else if (entry.chain === "btc") {
      adapter = new c.d.btcAdapter.BtcWallet(root, entry.network, {
        walletId: entry.id,
        storage: c.api.storage,
        log: (...a) => c.api.log(`[${entry.id}]`, ...a),
        onChange: () => emitStateForWallet(entry.id),
        accountPath: entry.accountPath,
      });
    } else {
      throw new Error(`unknown chain ${entry.chain}`);
    }
    rt.adapter = adapter;
    rt.phase = "ready";
    // Kick a first fetch. Errors here don't fail the mount — the panel shows
    // them per-wallet via snapshot.error.
    adapter.refresh(true).catch((e) => c.api.log(`[${entry.id}] initial refresh:`, e?.message || e));
    if (entry.chain === "bch" && c.wc) {
      c.wc.startForWallet({
        walletId: entry.id, label: entry.label,
        // Resolve the default from the wallet's OWN network. This used to
        // fall back to a hardcoded m/44'/145'/0' (mainnet), so a chipnet
        // wallet — which derives from m/44'/1'/0' — advertised xpubs for a
        // completely different key tree. Pairing succeeded and then the
        // dapp saw an unrelated, empty wallet; anything it built spent
        // from addresses this wallet does not own, so signing failed with
        // "no path for input". Silent, and only visible on testnet.
        root32: root, accountPath: entry.accountPath || adapter.snapshot?.()?.accountPath || "m/44'/145'/0'",
      }).catch((e) => c.api.log(`[${entry.id}] wc start:`, e?.message || e));
    }
    emitStateForWallet(entry.id);
  } catch (e) {
    rt.phase = "error";
    rt.error = e?.message || String(e);
    emitState();
  } finally {
    // Wipe the root buffer — the adapter has already turned it into keys.
    if (root) try { root.fill(0); } catch {}
  }
}

// Create a vault-derived wallet for a coin+network and mount it. Lifted out
// of the addWallet handler so "promote to HD" can build its destination
// through exactly the same path the Add flow uses — purpose allocation, the
// legacy-purpose carry-over and id numbering all stay in one place rather
// than being reimplemented slightly differently next to a money transfer.
async function createVaultWallet({ chain, network, label }) {
  const meta = chainMeta(chain, network);
  if (!meta) throw new Error("unknown chain/network");
  const list = walletEntries().slice();
  const netMeta = COINS[chain]?.networks?.[network] || {};
  const existingForCoin = list.filter((w) => w.chain === chain && w.network === network && !w.isLegacy);
  let purpose, isLegacy = false;
  if (netMeta.legacyFirstPurpose && existingForCoin.length === 0
      && !list.some((w) => w.purpose === netMeta.legacyFirstPurpose)) {
    purpose = netMeta.legacyFirstPurpose;
    isLegacy = true;
  } else {
    purpose = meta.purposePrefix + nextIndex(list, meta);
  }
  const id = makeWalletId(meta, nextIndex(list, meta));
  if (list.some((w) => w.id === id || w.purpose === purpose)) throw new Error("duplicate wallet");
  const entry = {
    id, chain, network, purpose, isLegacy,
    label: String(label || "").trim() || autoLabel(meta, list),
    createdAt: Date.now(),
  };
  list.push(entry);
  writeWallets(ctx.api, list);
  ctx.api.storage.set("selectedWalletId", id);
  ctx.runtimes.set(id, { entry, phase: "locked", error: null, adapter: null });
  emitState();
  await mountWallet(entry);
  return entry;
}

function unmountWallet(walletId) {
  const rt = ctx.runtimes.get(walletId);
  if (rt && rt.adapter) { try { rt.adapter.dispose(); } catch {} }
  if (ctx.wc) { try { ctx.wc.stopForWallet(walletId); } catch {} }
  wcIneligible.delete(walletId);
  ctx.runtimes.delete(walletId);
}

// ---- import derive helpers (client-side, cashaddr only) --------------------
// The pasted material never leaves this process — main-side stores it once
// via api.vault.imports.add. These helpers only turn (seed+path) or WIF into
// a P2PKH cashaddr, which is safe to send back to the panel.

// The import form's path box can hold either shape: a full leaf
// (m/44'/145'/0'/0/0) or a BIP44 ACCOUNT path, which is what a Copay /
// Bitcoin.com backup QR carries. The address we display should be the
// wallet's first receive address either way, so an account path gets
// extended rather than derived as if it were a leaf — deriving the account
// node itself yields an address the wallet has never used, which is exactly
// how an imported wallet ends up showing a balance of zero.
function firstReceivePath(path) {
  const p = String(path || "").trim();
  return wcAccountPath(p) === p ? p + "/0/0" : p;
}

function deriveCashaddrFromSeed(seedHex, path, prefix) {
  const d = ctx.d;
  const seed = new Uint8Array(seedHex.length / 2);
  for (let i = 0; i < seed.length; i++) seed[i] = parseInt(seedHex.substr(i * 2, 2), 16);
  const root = d.HDKey.fromMasterSeed(seed);
  const node = root.derive(path);
  const h160 = d.ripemd160(d.sha256(node.publicKey));
  return d.cashaddr.encode(prefix, 0, h160);
}
function deriveCashaddrFromWif(wif, prefix) {
  const d = ctx.d;
  // WIF layout: base58check(networkByte || privkey32 || [compressionByte 0x01])
  // Wrap decodeCheck so a malformed WIF (bad chars, bad checksum, or an
  // internal library shape change) surfaces as a user-facing "invalid WIF"
  // instead of leaking "TypeError: base58check.decode is not a function".
  let raw;
  try {
    raw = d.base58check.decodeCheck(wif);
  } catch (e) {
    throw new Error("invalid WIF format (base58check decode failed)");
  }
  if (raw.length !== 33 && raw.length !== 34) throw new Error(`bad WIF length ${raw.length}`);
  // First byte is version (network); we allow any — BCH mainnet uses 0x80,
  // testnet 0xEF. Both round-trip through the same address derivation below.
  const priv = raw.slice(1, 33);
  const compressed = raw.length === 34; // trailing 0x01 marker
  const pub = d.secp256k1.getPublicKey(priv, compressed);
  const h160 = d.ripemd160(d.sha256(pub));
  return d.cashaddr.encode(prefix, 0, h160);
}

// Plain-text body + rows for the host overlay (it escapes everything, so
// markup would show up literally). Outputs are decoded best-effort from the
// libauth transaction the dapp sent: P2PKH / P2SH locking bytecode → cashaddr.
// The WC message nests the WcSignTransactionRequest under .transaction, so
// the libauth tx itself is request.transaction.transaction (see wc-sign.js).
function buildWcApproval(payload) {
  const req = payload?.request || {};
  const tx = req.transaction || {};
  const dappName = String(tx.userPrompt || payload?.dappName || "unknown dapp").slice(0, 120);
  const walletName = payload?.label || payload?.walletId || "";
  const network = ctx.runtimes.get(payload?.walletId)?.entry?.network;
  const prefix = network === "chipnet" ? "bchtest" : "bitcoincash";
  let inner = tx.transaction;
  if (typeof inner === "string") {
    try {
      const lib = ctx.d.libauth;
      const dec = (lib.decodeTransactionCommon || lib.decodeTransaction)(ctx.d.tx.fromHex(inner));
      inner = typeof dec === "string" ? null : dec;
    } catch { inner = null; }
  }
  const inputCount = Array.isArray(req.inputPaths) ? req.inputPaths.length : (Array.isArray(inner?.inputs) ? inner.inputs.length : "?");
  const rows = [{ label: "Wallet", value: walletName }, { label: "Inputs", value: String(inputCount) }];
  // What the wallet is putting IN. The outputs alone never showed that a
  // transaction spends the user's tokens — and with the token prefix now
  // signed correctly (wc-sign.js) such a transaction is valid, so the
  // tokens leaving must be on the overlay.
  const hexOf = (v) => (typeof v === "string" ? v.toLowerCase() : Buffer.from(v || []).toString("hex"));
  const tokenText = (t) => {
    if (!t) return "";
    const cat = hexOf(t.category);
    let amt = "0";
    try { amt = BigInt(t.amount ?? 0).toString(); } catch {}
    const nft = t.nft ? ` + NFT (${String(t.nft.capability || "none")})` : "";
    return ` + token ${cat.slice(0, 8)}…${cat.slice(-4)}: ${amt} units${nft}`;
  };
  try {
    const srcs = Array.isArray(tx.sourceOutputs) ? tx.sourceOutputs : [];
    if (srcs.length) {
      let inTotal = 0n;
      const tokenLines = [];
      srcs.forEach((o, i) => {
        try { inTotal += BigInt(o.valueSatoshis ?? 0); } catch {}
        if (o.token) tokenLines.push(`input #${i + 1}${tokenText(o.token)}`);
      });
      rows.push({ label: "Spending", value: `${fmtBch(Number(inTotal))} BCH from ${srcs.length} input${srcs.length === 1 ? "" : "s"}` });
      if (tokenLines.length) rows.push({ label: "Tokens spent", value: tokenLines.slice(0, 8).join("\n") + (tokenLines.length > 8 ? `\n… and ${tokenLines.length - 8} more` : ""), mono: true, strong: true });
    }
  } catch {}
  try {
    const outs = inner?.outputs || [];
    let total = 0n;
    outs.slice(0, 8).forEach((o, i) => {
      const lb = o.lockingBytecode;
      const hexScript = typeof lb === "string" ? lb.toLowerCase() : Buffer.from(lb || []).toString("hex");
      let addr = null;
      if (/^76a914[0-9a-f]{40}88ac$/.test(hexScript)) addr = ctx.d.cashaddr.encode(prefix, 0, ctx.d.tx.fromHex(hexScript.slice(6, 46)));
      else if (/^a914[0-9a-f]{40}87$/.test(hexScript)) addr = ctx.d.cashaddr.encode(prefix, 1, ctx.d.tx.fromHex(hexScript.slice(4, 44)));
      const v = BigInt(o.valueSatoshis ?? 0);
      total += v;
      const token = tokenText(o.token);
      rows.push({ label: `Output #${i + 1}`, value: `${fmtBch(Number(v))} BCH${token} → ${addr || (hexScript.startsWith("6a") ? "OP_RETURN data" : "script " + hexScript.slice(0, 24) + "…")}`, mono: true });
    });
    if (outs.length > 8) rows.push({ label: "Outputs", value: `… and ${outs.length - 8} more` });
    if (outs.length) rows.push({ label: "Total out", value: `${fmtBch(Number(total))} BCH`, strong: true });
  } catch {}
  rows.push({ label: "After signing", value: tx.broadcast ? "the dapp broadcasts it" : "signed hex is returned to the dapp" });
  rows.push({ label: "Sighash", value: "ALL | FORKID | UTXOS" });
  return { body: `${dappName} asks you to sign a Bitcoin Cash transaction.`, rows, dappName };
}

// ---- per-purpose default wallets -------------------------------------------
// The wallet you pay from and the wallet you hand to a dapp are not
// necessarily the same one, and until now both fell out of whatever happened
// to be selected in the panel. That is why a WizardConnect pairing could land
// on an address the user did not recognise: with the selected wallet
// ineligible, pairing silently took the first one in list order.
//
// A role points at a wallet id. An id whose wallet has since been removed
// reads back as null rather than being trusted, so a stale pointer can never
// quietly redirect a payment.
const WALLET_ROLES = ["payments", "wizardconnect"];

function walletRoles() {
  const raw = ctx.api.storage.get("aegis/roles/v1", null);
  const list = readWallets(ctx.api) || [];
  const out = {};
  for (const role of WALLET_ROLES) {
    const id = raw && typeof raw === "object" ? String(raw[role] || "") : "";
    out[role] = id && list.some((w) => w.id === id) ? id : null;
  }
  return out;
}

function setWalletRole(role, walletId) {
  if (!WALLET_ROLES.includes(role)) throw new Error("unknown role: " + role);
  const next = walletRoles();
  if (walletId == null || walletId === "") next[role] = null;
  else {
    const list = readWallets(ctx.api) || [];
    if (!list.some((w) => w.id === walletId)) throw new Error("no such wallet");
    next[role] = String(walletId);
  }
  ctx.api.storage.set("aegis/roles/v1", next);
  return next;
}

// ---- state / snapshot -------------------------------------------------------

function selectedWalletId() {
  const list = readWallets(ctx.api) || [];
  if (!list.length) return null;
  const saved = String(ctx.api.storage.get("selectedWalletId", "") || "");
  if (saved && list.some((w) => w.id === saved)) return saved;
  // Nothing picked yet this session. The wallet the user nominated for
  // payments is a better opening guess than list order.
  const pay = walletRoles().payments;
  if (pay) return pay;
  const dflt = list.find((w) => w.isDefault) || list[0];
  return dflt.id;
}

function walletEntries() { return readWallets(ctx.api) || []; }

function overallPhase() {
  // If ANY wallet is nosetup, treat the whole addon as nosetup — the user
  // hasn't unlocked / set up the vault, so no wallet can work.
  const runtimes = [...ctx.runtimes.values()];
  if (!runtimes.length) return "locked";
  if (runtimes.some((r) => r.phase === "nosetup")) return "nosetup";
  if (runtimes.some((r) => r.phase === "locked")) return "locked";
  return "ready";
}

// Per-wallet reason a BCH wallet can't do WizardConnect even though it's
// mounted and ready — today that's single-key (WIF) imports, which have no
// seed to derive a per-dapp key tree from. Surfaced in walletSummary so the
// picker can grey them out instead of offering a pairing that must fail.
const wcIneligible = new Map();
function wcErrReason(e) {
  const m = e?.message || String(e);
  return /locked|vault/i.test(m)
    ? { short: "vault locked", detail: "Unlock the password vault to use WizardConnect with this wallet." }
    : { short: "unavailable", detail: m };
}

function walletSummary(w) {
  const meta = chainMeta(w.chain, w.network);
  const rt = ctx.runtimes.get(w.id);
  const snap = rt && rt.adapter ? rt.adapter.snapshot() : null;
  return {
    id: w.id, label: w.label, chain: w.chain, network: w.network, isDefault: !!w.isDefault, isLegacy: !!w.isLegacy,
    kind: w.kind || null,
    logo: meta?.logo || null, color: meta?.color || "#888",
    coinLabel: meta?.coinLabel || w.chain, networkLabel: meta?.networkLabel || w.network, testnet: !!meta?.testnet,
    ticker: meta?.ticker || "?", short: meta?.short || w.chain, decimals: meta?.decimals || 8,
    address: snap?.address || null,
    // Prefer the wallet-registry's stored accountPath; fall back to whatever
    // the runtime derived (default when the user hasn't overridden). Nulls
    // stay null so the picker knows whether to render the mono path line.
    accountPath: w.accountPath || snap?.accountPath || null,
    balance: snap?.balance || { confirmed: 0, unconfirmed: 0 },
    // Per-wallet assets, so the coin drilldown can show what each ADDRESS
    // holds instead of only the selected wallet's. `tokens` is the account-
    // model shape (SPL / TRC20); `tokenBalances` is BCH CashTokens, keyed
    // by category. Both stay null/empty for chains that have neither.
    tokens: Array.isArray(snap?.tokens) ? snap.tokens : [],
    tokenBalances: snap?.tokenBalances || null,
    phase: rt?.phase || "locked",
    error: rt?.error || null,
    wcBlocked: w.chain === "bch" ? (wcIneligible.get(w.id)?.detail || null) : null,
    wcBlockedShort: w.chain === "bch" ? (wcIneligible.get(w.id)?.short || null) : null,
  };
}

function snapshotForSelected() {
  const id = selectedWalletId();
  if (!id) return { phase: "empty" };
  const rt = ctx.runtimes.get(id);
  const entry = walletEntries().find((w) => w.id === id);
  const meta = entry ? chainMeta(entry.chain, entry.network) : null;
  const base = {
    walletId: id,
    label: entry?.label,
    chain: entry?.chain,
    network: entry?.network,
    isLegacy: !!entry?.isLegacy,
    kind: entry?.kind || null,
    meta: meta ? {
      logo: meta.logo, color: meta.color, short: meta.short, ticker: meta.ticker, decimals: meta.decimals,
      coinLabel: meta.coinLabel, networkLabel: meta.networkLabel, testnet: meta.testnet,
      addressFamilies: meta.addressFamilies, defaultAccountPath: meta.defaultAccountPath,
    } : null,
    supportsMessageSign: !!meta?.supportsMessageSign,
    phase: rt?.phase || "locked",
    error: rt?.error || null,
  };
  if (rt && rt.adapter) Object.assign(base, rt.adapter.snapshot());
  return base;
}

function fullState() {
  return {
    overallPhase: overallPhase(),
    selectedWalletId: selectedWalletId(),
    roles: walletRoles(),
    wallets: walletEntries().map(walletSummary),
    selected: snapshotForSelected(),
    bchServers: {
      list: bchServerList(ctx.api),
      custom: Array.isArray(ctx.api.storage.get("servers", null)),
    },
    coins: coinsForPanel(),
    prices: ctx.priceFeed ? ctx.priceFeed.snapshot() : { enabled: false, prices: {} },
    wc: ctx.wc ? ctx.wc.snapshot() : {},
  };
}

function emitState() { try { ctx.api.emit("state", fullState()); } catch {} }
function emitStateForWallet(id) {
  // Any wallet change fans out to the panel with the full state so the
  // wallet list balances update in the header too.
  if (!ctx || !ctx.runtimes.has(id)) return;
  emitState();
}

// ---- panel messages ---------------------------------------------------------

function requireWallet(id) {
  const rt = ctx.runtimes.get(id);
  if (!rt || rt.phase !== "ready" || !rt.adapter) throw new Error("wallet is not ready (vault locked?)");
  return rt;
}
function requireSelected() { return requireWallet(selectedWalletId()); }

// ---- PIN: sealed blob + host-verified transaction clearance ---------------
// The PIN blob is the vault master password wrapped under a 6-digit PIN. In
// plain add-on storage that made the master password exactly as strong as a
// million PBKDF2 guesses to anyone holding a copy of the profile (a backup,
// another machine, a disk image) — the panel's lockout counter never sees an
// offline guess. It is therefore sealed with the OS keystore (DPAPI /
// Keychain / libsecret) before it touches disk, the same as Theseus's own
// vault PIN: a copied file is useless without this OS account. A plain blob
// from an older build is sealed the first time it is read.
const PIN_BLOB_KEY = "aegis/pin/v1";
function sealPinBlob(api, blob) {
  const ss = safeStorageOr(api);
  try {
    if (ss && ss.isEncryptionAvailable()) {
      return { v: 2, sealed: ss.encryptString(JSON.stringify(blob)).toString("base64") };
    }
  } catch { /* fall through: unsealed is still better than no PIN at all */ }
  return blob;
}
function openPinBlob(api) {
  const b = api.storage.get(PIN_BLOB_KEY, null);
  if (!b || typeof b !== "object") return null;
  if (b.sealed) {
    const ss = safeStorageOr(api);
    if (!ss) return null;
    try {
      const plain = JSON.parse(ss.decryptString(Buffer.from(String(b.sealed), "base64")));
      return (plain && typeof plain === "object") ? plain : null;
    } catch { return null; }      // sealed under another OS account: the PIN is simply gone
  }
  const plain = { salt: b.salt, iv: b.iv, ct: b.ct, iters: b.iters };
  const sealed = sealPinBlob(api, plain);
  if (sealed.sealed) api.storage.set(PIN_BLOB_KEY, sealed);
  return plain;
}

// The PIN is checked here, never in the panel. The panel used to fetch the
// blob and decrypt it itself, then report its own failures — so the lockout
// counted only the guesses a well-behaved panel chose to report, and anything
// that could run in the panel could take the blob and search all million
// PINs offline. Now the blob stays in this process, every guess is counted
// before it is tried, and PIN_MAX_FAILS wrong guesses switch the PIN off
// until the master password is entered (no timer that hands out more tries).
// The blob format is unchanged: PBKDF2-SHA256(pin) -> AES-256-GCM, hex, tag
// appended to the ciphertext, as WebCrypto wrote it.
const PIN_ITERS = 600_000;
const PIN_MAX_FAILS = 5;
const PIN_RE = /^\d{6}$/;
const nodeCrypto = require("node:crypto");
const pinKey = (pin, saltHex, iters) => new Promise((resolve, reject) =>
  nodeCrypto.pbkdf2(String(pin), Buffer.from(saltHex, "hex"), iters, 32, "sha256", (e, k) => (e ? reject(e) : resolve(k))));
async function pinWrap(pin, masterPassword) {
  const salt = nodeCrypto.randomBytes(16).toString("hex");
  const iv = nodeCrypto.randomBytes(12);
  const c = nodeCrypto.createCipheriv("aes-256-gcm", await pinKey(pin, salt, PIN_ITERS), iv);
  const ct = Buffer.concat([c.update(String(masterPassword), "utf8"), c.final(), c.getAuthTag()]);
  return { salt, iv: iv.toString("hex"), ct: ct.toString("hex"), iters: PIN_ITERS };
}
async function pinUnwrapBlob(pin, blob) {
  const ct = Buffer.from(String(blob.ct), "hex");
  const d = nodeCrypto.createDecipheriv("aes-256-gcm", await pinKey(pin, blob.salt, Number(blob.iters) || PIN_ITERS), Buffer.from(String(blob.iv), "hex"));
  d.setAuthTag(ct.subarray(ct.length - 16));
  return Buffer.concat([d.update(ct.subarray(0, ct.length - 16)), d.final()]).toString("utf8");
}
function pinFails(api) {
  const n = Number(api.storage.get("aegis/pin/failCount", 0)) || 0;
  return { fails: n, requireMaster: !!api.storage.get("aegis/pin/requireMaster", false) || n >= PIN_MAX_FAILS };
}
// A master password the vault accepted. Clears the PIN strikes — the only
// thing that does, apart from a correct PIN while the PIN is still allowed.
function noteMasterVerified(api) {
  api.storage.set("aegis/pin/failCount", 0);
  api.storage.set("aegis/pin/requireMaster", false);
}

// "Ask for PIN on every transaction" used to be decided by the host and
// enforced by nobody: `send` never checked it, and a dapp-initiated
// transaction had no PIN step at all. A clearance is now a short-lived,
// single-use fact recorded only after the host itself has verified the
// master password the PIN unwraps (pinGateSatisfied). Panel sends consume
// one; dapp transactions ask the open panel for one and wait.
const TX_CLEARANCE_MS = 90_000;
const DAPP_PIN_WAIT_MS = 120_000;
let txClearanceUntil = 0;
let pendingPinRequest = null;       // { origin, what, at } while a dapp tx waits for the PIN
function txPinOwed() {
  try { return !!(ctx && ctx.pinNeeded && ctx.pinNeeded("transaction").needPin); }
  catch { return true; }             // the safe direction for a lock is closed
}
function takeTxClearance() {
  if (Date.now() < txClearanceUntil) { txClearanceUntil = 0; return true; }
  return false;
}
function requirePanelTxPin() {
  if (txPinOwed() && !takeTxClearance()) throw new Error("PIN required — confirm your PIN to continue");
}
async function requireDappTxPin(origin, what) {
  if (!txPinOwed() || takeTxClearance()) return;
  pendingPinRequest = { origin: String(origin || ""), what: String(what || "transaction"), at: Date.now() };
  try {
    try { ctx.api.emit("pinRequest", pendingPinRequest); } catch {}
    const deadline = Date.now() + DAPP_PIN_WAIT_MS;
    while (Date.now() < deadline) {
      await new Promise((r) => setTimeout(r, 250));
      if (!ctx) break;
      if (takeTxClearance()) return;
    }
  } finally { pendingPinRequest = null; }
  throw new Error("Aegis asks for your PIN on every transaction. Open the Aegis panel, confirm your PIN there, then try again.");
}

// Signed text shown on an approval overlay. Long messages are cut for the
// overlay's sake, but never silently: the cut says how much is missing, so a
// benign-looking opening cannot hide what the rest commits the user to.
function previewText(text, max = 1500) {
  const s = String(text);
  return s.length > max ? `${s.slice(0, max)}\n… [${s.length - max} more characters are NOT shown but will be signed]` : s;
}
function fromPanel(m) { if (!m || m.from !== "panel") throw new Error("panel-only message"); }
function fromPage(m) {
  if (!m || m.from !== "page" || !m.origin) throw new Error("page-only message");
  return m.origin;
}

// Head and tail of an address, with any "bitcoincash:"/"bchtest:" prefix
// dropped — the prefix is the same on every row, so it costs width without
// helping anyone tell two addresses apart.
function shortAddr(addr) {
  const s = String(addr || "");
  const body = s.includes(":") ? s.slice(s.indexOf(":") + 1) : s;
  return body.length <= 20 ? body : body.slice(0, 10) + "…" + body.slice(-6);
}

const fmtBch = (sats) => (Number(sats) / 1e8).toFixed(8).replace(/(\.\d*?[1-9])0+$|\.0+$/, "$1");
const fmtTrx = (sun) => (Number(sun) / 1e6).toFixed(6).replace(/(\.\d*?[1-9])0+$|\.0+$/, "$1");
function fmtValue(units, decimals) {
  const n = Number(units) / Math.pow(10, decimals);
  return n.toFixed(decimals).replace(/(\.\d*?[1-9])0+$|\.0+$/, "$1");
}
// BigInt-safe display for SPL token amounts (raw units in u64 strings).
function fmtTokenAmount(rawStr, decimals) {
  const s = String(rawStr || "0");
  const neg = s.startsWith("-");
  const abs = neg ? s.slice(1) : s;
  const d = Number(decimals) || 0;
  if (d === 0) return (neg ? "-" : "") + abs;
  const pad = abs.padStart(d + 1, "0");
  const whole = pad.slice(0, pad.length - d);
  const frac = pad.slice(pad.length - d).replace(/0+$/, "");
  return (neg ? "-" : "") + whole + (frac ? "." + frac : "");
}

function registerPanelMessages(api) {
  api.onMessage("state", (_p, m) => { fromPanel(m); return fullState(); });
  api.onMessage("selectWallet", (p, m) => {
    fromPanel(m);
    const id = String(p && p.id || "");
    if (!walletEntries().some((w) => w.id === id)) throw new Error("unknown wallet");
    api.storage.set("selectedWalletId", id);
    emitState();
    return fullState();
  });
  api.onMessage("addWallet", async (p, m) => {
    fromPanel(m);
    const chain = String(p && p.chain || "");
    const network = String(p && p.network || "");
    // Purpose allocation and mounting live in createVaultWallet — see there
    // for why (legacyFirstPurpose carry-over, id numbering).
    await createVaultWallet({ chain, network, label: String(p && p.label || "") });
    return fullState();
  });
  // Vault lifecycle from inside the wallet panel — no more redirecting the
  // user to Settings > Passwords. After a successful unlock/setup we remount
  // every wallet: the vault-derive route is now available.
  api.onMessage("vaultSetup", async (p, m) => {
    fromPanel(m);
    const pw = String(p && p.masterPassword || "");
    const seedSource = p && p.seedSource;
    await api.vault.lifecycle.setup(pw, seedSource);
    await mountAllWallets();
    return fullState();
  });
  api.onMessage("vaultUnlock", async (p, m) => {
    fromPanel(m);
    const pw = String(p && p.masterPassword || "");
    await api.vault.lifecycle.unlock(pw);
    noteMasterVerified(api);
    await mountAllWallets();
    return fullState();
  });
  api.onMessage("vaultStatus", async (_p, m) => {
    fromPanel(m);
    return api.vault.lifecycle.status();
  });

  // ---- wallet import (M.1 of DESIGN-wallet-multi-account-amendment.md) ----
  // Accepts either a BIP39 mnemonic (12/24 words) + BIP44 path, OR a raw WIF.
  // Derives the P2PKH cashaddr client-side, stores the signer material via
  // api.vault.imports.add (main-process holds it), then adds a slim Aegis
  // wallet entry with kind=imported pointing at the returned importId.
  api.onMessage("importWallet", async (p, m) => {
    fromPanel(m);
    const chain = String(p && p.chain || "bch");
    const network = String(p && p.network || "").trim();
    const label = String(p && p.label || "").trim();
    if (!label) throw new Error("label required");
    const category = String(p && p.category || "operational").trim();
    const source = String(p && p.source || "manual-paste");

    // Chain-specific address derivation. Every branch has to produce an
    // `address` string + fill spec.{seed,path} or spec.wif/privkey. The
    // spec is what lands in wallet-imports.enc; the address gets stored on
    // the Aegis wallet entry so the picker/strip can show it without
    // touching the imports file.
    const spec = { kind: null, label, category, source };
    let address = null;
    const der = ctx.d.derive;

    if (chain === "bch") {
      const net = network || "chipnet";
      if (net !== "mainnet" && net !== "chipnet") throw new Error(`BCH network must be mainnet or chipnet (got ${net})`);
      const prefix = net === "mainnet" ? "bitcoincash" : "bchtest";
      if (p && p.wif) {
        spec.kind = "wif"; spec.wif = String(p.wif).trim();
        address = deriveCashaddrFromWif(spec.wif, prefix);
      } else if (p && p.mnemonic) {
        spec.kind = "seed"; spec.seed = der.mnemonicToSeedHex(String(p.mnemonic).trim());
        spec.path = String(p.path || (net === "mainnet" ? "m/44'/145'/0'/0/0" : "m/44'/1'/0'/0/0"));
        address = deriveCashaddrFromSeed(spec.seed, firstReceivePath(spec.path), prefix);
      } else if (p && p.seedHex) {
        spec.kind = "seed"; spec.seed = String(p.seedHex).trim().toLowerCase().replace(/^0x/, "");
        if (!/^[0-9a-f]{64,128}$/.test(spec.seed)) throw new Error("seedHex must be 32-64 bytes of hex");
        spec.path = String(p.path || (net === "mainnet" ? "m/44'/145'/0'/0/0" : "m/44'/1'/0'/0/0"));
        address = deriveCashaddrFromSeed(spec.seed, firstReceivePath(spec.path), prefix);
      } else { throw new Error("supply mnemonic, seedHex, or wif"); }
      spec.cashaddr = address;
    } else if (chain === "btc" || chain === "dgb") {
      const defaults = { btc: { network: "mainnet", path: "m/84'/0'/0'/0/0" }, dgb: { network: "mainnet", path: "m/84'/20'/0'/0/0" } };
      const net = network || defaults[chain].network;
      const purposeHint = Number(p && p.purpose || 84);
      if (p && p.wif) {
        spec.kind = "wif"; spec.wif = String(p.wif).trim();
        address = chain === "btc" ? der.btc.fromWif(spec.wif, net, purposeHint) : der.dgb.fromWif(spec.wif, purposeHint);
      } else if (p && p.mnemonic) {
        spec.kind = "seed"; spec.seed = der.mnemonicToSeedHex(String(p.mnemonic).trim());
        spec.path = String(p.path || defaults[chain].path);
        if (chain === "btc") address = der.btc.fromSeed(spec.seed, spec.path, net);
        else {
          // A DigiByte seed can belong to the 2018-19 official mobile
          // wallets, which built the master node with HMAC key
          // "DigiByte seed". Carry the choice onto the spec so the entry
          // records which tree the stored address came from.
          const hk = String((p && p.hmacKey) || der.dgb.HMAC_BITCOIN_SEED);
          if (hk !== der.dgb.HMAC_BITCOIN_SEED && hk !== der.dgb.HMAC_DIGIBYTE_SEED) {
            throw new Error("unknown DigiByte master-key variant");
          }
          if (hk !== der.dgb.HMAC_BITCOIN_SEED) spec.hmacKey = hk;
          address = der.dgb.fromSeed(spec.seed, spec.path, hk);
        }
      } else { throw new Error("supply mnemonic or wif"); }
      // Theseus's api.vault.imports.add validates a `cashaddr` field (from
      // when only BCH imports existed). Reuse the same field name for
      // every chain — Aegis reads it back by importId and knows the shape
      // via entry.chain. Doesn't have to be a real cashaddr.
      spec.cashaddr = address;
    } else if (chain === "eth" || chain === "trx" || chain === "sol") {
      const defaults = {
        eth: { network: "mainnet", path: "m/44'/60'/0'/0/0" },
        trx: { network: "mainnet", path: "m/44'/195'/0'/0/0" },
        sol: { network: "mainnet", path: "m/44'/501'/0'/0'" },
      };
      const net = network || defaults[chain].network;
      if (p && p.mnemonic) {
        spec.kind = "seed"; spec.seed = der.mnemonicToSeedHex(String(p.mnemonic).trim());
        spec.path = String(p.path || defaults[chain].path);
        if (chain === "eth") address = der.eth.fromSeed(spec.seed, spec.path);
        else if (chain === "trx") address = der.trx.fromSeed(spec.seed, spec.path);
        else address = der.sol.fromSeed(spec.seed, spec.path);
      } else if (p && p.privHex) {
        // Theseus's vault.imports.add only recognises kind "seed" (BIP39
        // + path) and "wif" (a base58check Bitcoin key). Raw hex keys
        // for ETH/TRX/SOL don't fit either shape, so we pack them into
        // the wif slot with a scheme prefix (`aegis-privhex:<hex>`) —
        // the vault doesn't inspect the value, just stores it. Aegis
        // reads its own prefix back when spending ships. Panel state
        // + address are computed here, so read-only balance / receive
        // work today without touching the vault field.
        spec.kind = "wif";
        // Normalise raw hex the user pasted. Tolerate every common mangle
        // path so the panel error surface is a clear "expected 32-byte
        // hex" instead of the raw noble/hashes error string:
        //   - leading / trailing whitespace, mixed case
        //   - "0x" or "0X" prefix
        //   - internal whitespace, tabs, newlines, commas, colons, dashes
        //   - accidental quotes wrapping the paste
        //   - a preamble like "private key: <hex>" (e.g. from an AI-agent
        //     transcript) — pick the longest hex-shaped substring.
        let raw = String(p.privHex).trim();
        raw = raw.replace(/^['"`]+|['"`]+$/g, "");
        // If the user pasted a multi-line block, extract the longest
        // run of hex characters and treat that as the key.
        const hexRuns = raw.match(/[0-9a-fA-F]{16,}/g);
        if (hexRuns && hexRuns.length) {
          hexRuns.sort((a, b) => b.length - a.length);
          raw = hexRuns[0];
        }
        raw = raw.toLowerCase().replace(/^0x/, "").replace(/[\s,:_\-]/g, "");
        if (!/^[0-9a-f]+$/.test(raw)) {
          // Give the user something concrete to act on. Tron-specific
          // hints: base58-shaped strings that start with T (34 chars) are
          // addresses, not private keys; whitespace-separated words look
          // like a mnemonic.
          const original = String(p.privHex).trim();
          if (/^T[1-9A-HJ-NP-Za-km-z]{33}$/.test(original)) {
            throw new Error("That looks like a Tron address (T…), not a private key. Paste the 64-hex-character private key instead.");
          }
          if (/^([a-z]+\s+){11,}[a-z]+$/i.test(original)) {
            throw new Error("That looks like a BIP39 mnemonic. Switch the import format to 'Mnemonic + path'.");
          }
          throw new Error("Private key must be hex (with or without 0x). Whitespace, dashes and colons are ignored, but non-hex characters aren't accepted.");
        }
        if (raw.length !== 64) {
          throw new Error(`Private key must be 32 bytes (64 hex characters). Got ${raw.length} hex character${raw.length === 1 ? "" : "s"} after normalising the paste.`);
        }
        // Derive first so any bad key surfaces before we write to disk.
        if (chain === "eth") address = der.eth.fromPrivHex(raw);
        else if (chain === "trx") address = der.trx.fromPrivHex(raw);
        else address = der.sol.fromPrivHex(raw);
        spec.wif = `aegis-privhex:${raw}`;
      } else if (p && p.privB58 && chain === "sol") {
        // Same repacking trick as privhex above — Solana's Phantom-style
        // base58 key gets packed into wif with an `aegis-privb58:` tag.
        const raw = String(p.privB58).trim();
        address = der.sol.fromBase58(raw);
        spec.kind = "wif";
        spec.wif = `aegis-privb58:${raw}`;
      } else { throw new Error("supply mnemonic, privHex" + (chain === "sol" ? ", or privB58" : "")); }
      spec.cashaddr = address; // storage-key reuse — see BTC/DGB comment above
    } else if (chain === "sc") {
      // Siacoin. Uses a 32-byte root seed + u64 index (KeyFromSeed layout);
      // no BIP44 path. Accepts a BIP39 12-word mnemonic (matches Sia
      // Central Lite / walletd, PBKDF2 → first 32 bytes) or raw 32-byte
      // seed hex. Address at index 0 is what we surface at import time;
      // the mounted SiaWallet lets users advance through additional
      // indices via the "Next unused address" affordance.
      const net = network || "mainnet";
      if (net !== "mainnet") throw new Error(`SC only supports mainnet (got ${net})`);
      const index = Number(p && p.index != null ? p.index : 0);
      if (!Number.isInteger(index) || index < 0) throw new Error("SC index must be a non-negative integer");
      let seedHex;
      if (p && p.mnemonic) {
        const r = der.sc.fromMnemonic(String(p.mnemonic).trim(), index);
        seedHex = r.seedHex; address = r.address;
      } else if (p && p.seedHex) {
        const r = der.sc.fromSeedHex(String(p.seedHex).trim(), index);
        seedHex = r.seedHex; address = r.address;
      } else { throw new Error("supply mnemonic or seedHex"); }
      spec.kind = "seed";
      spec.seed = seedHex;
      // path field carries the Sia address index as an integer string,
      // opaque to the vault. Mount reads it back as Number(spec.path).
      spec.path = String(index);
      spec.cashaddr = address;
    } else {
      throw new Error(`import not supported for chain "${chain}"`);
    }

    const { id: importId } = await api.vault.imports.add(spec);
    const netForId = network || "mainnet";
    const list = walletEntries().slice();
    const walletId = `${chain}-imported-${importId}`;
    if (list.some((w) => w.id === walletId)) throw new Error("duplicate import id");
    const entry = {
      id: walletId, label, chain, network: netForId,
      kind: "imported", importId,
      importedAddress: address, importedCategory: category,
      accountPath: spec.path || null,
      createdAt: Date.now(),
    };
    list.push(entry);
    writeWallets(api, list);
    api.storage.set("selectedWalletId", walletId);
    ctx.runtimes.set(walletId, { entry, phase: "locked", error: null, adapter: null });
    emitState();
    await mountWallet(entry);
    return fullState();
  });

  api.onMessage("removeWallet", (p, m) => {
    fromPanel(m);
    const id = String(p && p.id || "");
    const list = walletEntries();
    const entry = list.find((w) => w.id === id);
    if (!entry) throw new Error("unknown wallet");
    if (entry.isDefault) throw new Error("the default wallet cannot be removed");
    const next = list.filter((w) => w.id !== id);
    writeWallets(api, next);
    if (selectedWalletId() === id) api.storage.set("selectedWalletId", next[0]?.id || "");
    unmountWallet(id);
    // Drop per-wallet storage subtree.
    const all = api.storage.all ? api.storage.all() : {};
    const prefix = `wallets/${id}/`;
    for (const k of Object.keys(all)) if (k.startsWith(prefix)) api.storage.set(k, null);
    emitState();
    return fullState();
  });
  api.onMessage("renameWallet", (p, m) => {
    fromPanel(m);
    const id = String(p && p.id || "");
    const label = String(p && p.label || "").trim().slice(0, 60);
    if (!label) throw new Error("label required");
    const list = walletEntries();
    const entry = list.find((w) => w.id === id);
    if (!entry) throw new Error("unknown wallet");
    entry.label = label;
    writeWallets(api, list);
    emitState();
    return fullState();
  });

  api.onMessage("refresh", async (_p, m) => { fromPanel(m); const rt = requireSelected(); await rt.adapter.refresh(true); return snapshotForSelected(); });
  // Panel drilldown → refresh every wallet under a chain (optionally scoped
  // to one subnetwork). Fires each adapter's refresh in parallel; individual
  // failures set the adapter's own error field (surfaced back to the panel
  // via emitStateForWallet) rather than aborting the batch. Returns the
  // list of {id, ok, error} so the panel can flash a summary.
  api.onMessage("refreshChain", async (p, m) => {
    fromPanel(m);
    const chain = String(p?.chain || "");
    const network = p?.network ? String(p.network) : null;
    if (!chain) throw new Error("chain is required");
    const targets = walletEntries().filter((w) => w.chain === chain && (!network || w.network === network));
    const out = [];
    await Promise.all(targets.map(async (w) => {
      const rt = ctx.runtimes.get(w.id);
      if (!rt || !rt.adapter) { out.push({ id: w.id, ok: false, error: "adapter not mounted" }); return; }
      try {
        await rt.adapter.refresh(true);
        // The adapters catch their own fetch failures onto state.error rather
        // than rejecting, so awaiting refresh() proves nothing. Read the
        // snapshot back, or a dead server reports a successful refresh.
        let snapErr = null;
        try { snapErr = rt.adapter.snapshot()?.error || null; } catch { snapErr = null; }
        out.push(snapErr ? { id: w.id, ok: false, error: snapErr } : { id: w.id, ok: true });
      } catch (e) { out.push({ id: w.id, ok: false, error: e?.message || String(e) }); }
    }));
    return { chain, network, results: out };
  });
  api.onMessage("nextAddress", (_p, m) => {
    fromPanel(m);
    const rt = requireSelected();
    if (rt.entry.chain !== "bch") throw new Error("only BCH wallets have multiple receive addresses");
    rt.adapter.nextAddress();
    return snapshotForSelected();
  });
  api.onMessage("openUrl", (p, m) => { fromPanel(m); api.openTab(String(p && p.url || "")); return true; });
  api.onMessage("aegisVersion", (_p, m) => {
    fromPanel(m);
    try { return require("./addon.json").version; } catch { return ""; }
  });
  // Panel gate uses this to jump to Settings › Passwords when the vault is
  // locked / not yet created — one-click bridge to Theseus's built-in UI.
  api.onMessage("openSettings", (p, m) => { fromPanel(m); api.openSettings(String(p && p.section || "")); return true; });
  // Panel-initiated update flow. Preferred path: Theseus exposes
  // checkAndStageSelfUpdate + restartApp (added 0.3.48). The panel calls
  // "requestUpdate" for the two-step chip flow:
  //   step "stage"   — verify + stage the newest signed build; the reply
  //                    carries { status, current, next } so the panel can
  //                    show "Update to vX.Y.Z ready — restart to apply".
  //   step "apply"   — cleanly relaunches Theseus, which runs
  //                    promoteStagedUpdates() before activating add-ons.
  // Falls back to opening Settings › Extensions when running under an
  // older Theseus that lacks either hook.
  api.onMessage("requestUpdate", async (p, m) => {
    fromPanel(m);
    const step = String(p?.step || "stage");
    if (step === "apply") {
      if (typeof api.restartApp !== "function") return { restarted: false, fallback: "settings" };
      try { api.restartApp(); return { restarted: true }; }
      catch (e) { return { restarted: false, err: e?.message || String(e) }; }
    }
    if (typeof api.checkAndStageSelfUpdate !== "function") return { staged: false, fallback: "settings" };
    try {
      const r = await api.checkAndStageSelfUpdate();
      // "staged" and "already-staged" both mean a newer signed build is
      // waiting for the next launch — surface it to the panel identically.
      const ok = r?.status === "staged" || r?.status === "already-staged";
      return { staged: ok, status: r?.status || "unknown", detail: r?.detail || null, current: r?.current || null, next: r?.next || null };
    } catch (e) {
      return { staged: false, err: e?.message || String(e) };
    }
  });

  api.onMessage("setBchServers", (p, m) => {
    fromPanel(m);
    const patch = p || {};
    if ("servers" in patch) {
      const list = Array.isArray(patch.servers) ? patch.servers.map((s) => String(s).trim()).filter(Boolean) : [];
      for (const s of list) if (!/^wss?:\/\/[^/\s]+$/i.test(s)) throw new Error(`server must be ws(s)://host:port — got ${s}`);
      api.storage.set("servers", list.length ? list : null);
      // Push the new server list into every mounted BCH wallet.
      for (const rt of ctx.runtimes.values()) {
        if (rt.entry.chain === "bch" && rt.adapter) rt.adapter.setServers(bchServerList(api));
      }
    }
    return fullState();
  });
  api.onMessage("setAccountPath", (p, m) => {
    fromPanel(m);
    const patch = p || {};
    const id = String(patch.id || selectedWalletId());
    const entry = walletEntries().find((w) => w.id === id);
    if (!entry) throw new Error("unknown wallet");
    if (!["bch", "dgb", "btc"].includes(entry.chain)) throw new Error("account path is a BCH/BTC/DGB-only setting");
    const v = String(patch.accountPath || "").trim();
    if (v && !/^m(\/\d+'?)+$/.test(v)) throw new Error("derivation path must look like m/84'/0'/0'");
    const list = walletEntries();
    const idx = list.findIndex((w) => w.id === id);
    // Per-network default: BTC/DGB come from the registry helper, BCH keeps
    // its historical m/44'/145'/0'.
    const dflt = entry.chain === "bch"
      ? "m/44'/145'/0'"
      : (defaultAccountPathFor(COINS[entry.chain], entry.network) || "m/84'/0'/0'");
    list[idx] = { ...list[idx], accountPath: v || dflt };
    writeWallets(api, list);
    const rt = ctx.runtimes.get(id);
    if (rt && rt.adapter) { try { rt.adapter.dispose(); } catch {} rt.adapter = null; rt.phase = "locked"; }
    mountWallet(list[idx]);
    return fullState();
  });
  // ETH/SOL: per-wallet RPC URL, live-swap without key rebuild.
  api.onMessage("setRpcUrl", (p, m) => {
    fromPanel(m);
    const patch = p || {};
    const id = String(patch.id || selectedWalletId());
    const entry = walletEntries().find((w) => w.id === id);
    if (!entry) throw new Error("unknown wallet");
    if (entry.chain !== "eth" && entry.chain !== "sol") throw new Error("RPC URL is an ETH/SOL setting");
    const v = String(patch.rpcUrl || "").trim();
    if (v && !/^https?:\/\/[^\s]+$/i.test(v)) throw new Error("RPC URL must start with http:// or https://");
    api.storage.set(`wallets/${id}/rpcUrl`, v);
    const rt = ctx.runtimes.get(id);
    if (rt && rt.adapter && typeof rt.adapter.setRpcUrl === "function") {
      rt.adapter.setRpcUrl(v);
      rt.adapter.refresh().catch((e) => api.log(`[${id}] refresh:`, e?.message || e));
    }
    emitState();
    return fullState();
  });
  // Sia-only: per-wallet walletd URL. Live: pushes the URL into the adapter
  // without rebuilding the keys (the seed stays derived from the same
  // vault path — only the node the wallet talks to changes).
  api.onMessage("setWalletdUrl", (p, m) => {
    fromPanel(m);
    const patch = p || {};
    const id = String(patch.id || selectedWalletId());
    const entry = walletEntries().find((w) => w.id === id);
    if (!entry) throw new Error("unknown wallet");
    if (entry.chain !== "sc") throw new Error("walletd URL is a Sia-only setting");
    const v = String(patch.walletdUrl || "").trim();
    if (v && !/^https?:\/\/[^\s]+$/i.test(v)) throw new Error("walletd URL must start with http:// or https://");
    api.storage.set(`wallets/${id}/walletdUrl`, v);
    const rt = ctx.runtimes.get(id);
    if (rt && rt.adapter) {
      rt.adapter.setWalletdUrl(v);
      if (v) rt.adapter.startPolling();
      rt.adapter.refresh(true).catch((e) => api.log(`[${id}] refresh:`, e?.message || e));
    }
    emitState();
    return fullState();
  });

  // Live plan preview for the selected wallet.
  api.onMessage("planSend", async (p, m) => {
    fromPanel(m);
    const rt = requireSelected();
    const plan = await Promise.resolve(rt.adapter.plan(p || {}));
    return describePlan(plan, rt.entry.chain, rt.entry.network);
  });
  // SPL token plan/send — only meaningful when the selected wallet is SOL.
  api.onMessage("planTokenSend", async (p, m) => {
    fromPanel(m);
    const rt = requireSelected();
    if (rt.entry.chain !== "sol" || typeof rt.adapter.planTokenTransfer !== "function") {
      throw new Error("token send is a Solana-only flow");
    }
    const plan = await rt.adapter.planTokenTransfer(p || {});
    return {
      recipients: plan.recipients, fee: String(plan.fee), feeRate: String(plan.feeRate),
      inputs: 0, change: "0", total: plan.total, mint: plan.mint, decimals: plan.decimals,
    };
  });
  api.onMessage("sendToken", async (p, m) => {
    fromPanel(m);
    requirePanelTxPin();
    const rt = requireSelected();
    if (rt.entry.chain !== "sol") throw new Error("token send is Solana-only");
    const plan = await rt.adapter.planTokenTransfer(p || {});
    const meta = chainMeta("sol", rt.entry.network);
    const tokenInfo = (rt.adapter.snapshot().tokens || []).find((t) => t.mint === plan.mint) || {};
    const rows = [
      { label: "To", value: plan.recipients[0].to, mono: true },
      { label: "Amount", value: `${fmtTokenAmount(plan.recipients[0].value, plan.decimals)} ${tokenInfo.symbol || "token"}`, strong: true },
      { label: "Mint", value: plan.mint, mono: true },
      { label: "Network fee", value: `~${fmtValue(Number(plan.fee), meta.decimals)} SOL${(plan._spl && plan._spl.destExists === false) ? " (includes new token account rent)" : ""}` },
      { label: "Wallet", value: `${rt.entry.label} — Solana · ${rt.entry.network}` },
    ];
    const pick = await api.approvalModal({
      title: `Send ${tokenInfo.symbol || "SPL token"}?`,
      origin: "Aegis wallet panel",
      rows,
      actions: [{ id: "send", label: "Send", primary: true }],
    });
    if (pick !== "send") throw new Error("cancelled");
    return rt.adapter.signAndBroadcastToken(plan);
  });
  // Execute a send with approval overlay.
  api.onMessage("send", async (p, m) => {
    fromPanel(m);
    requirePanelTxPin();
    // The panel names the wallet its form was built for. If the selection
    // moved since (another surface, a late state push), refuse rather than
    // send this amount from a different wallet.
    if (p && p.walletId && String(p.walletId) !== selectedWalletId()) {
      throw new Error("the selected wallet changed — review the send and try again");
    }
    const rt = requireSelected();
    const plan = await Promise.resolve(rt.adapter.plan(p || {}));
    const d = describePlan(plan, rt.entry.chain, rt.entry.network);
    const meta = chainMeta(rt.entry.chain, rt.entry.network);
    const rows = [
      { label: "To", value: d.recipients[0].to, mono: true },
      { label: "Amount", value: `${fmtValue(d.recipients[0].value, meta.decimals)} ${meta.ticker}`, strong: true },
      { label: "Fee", value: rt.entry.chain === "bch" ? `${plan.fee} sat (${plan.feeRate} sat/B)` : `${fmtValue(plan.fee, meta.decimals)} ${meta.ticker}` },
      { label: "Total", value: `${fmtValue(d.total, meta.decimals)} ${meta.ticker}` },
      { label: "Wallet", value: `${rt.entry.label} — ${meta.coinLabel} · ${meta.networkLabel}` },
    ];
    const pick = await api.approvalModal({
      title: `Send ${meta.ticker}?`,
      origin: "Aegis wallet panel",
      rows,
      actions: [{ id: "send", label: "Send", primary: true }],
    });
    if (pick !== "send") throw new Error("cancelled");
    return rt.adapter.signAndBroadcast(plan);
  });

  // ---- Balance consolidation ------------------------------------------------
  // Batch send-max from every same-chain/same-network wallet (or a subset the
  // user picked with checkboxes) into the currently-selected wallet. Runs in
  // two phases:
  //   consolidatePreview   — dry-run plan() per source; returns balance/fee/
  //                          net/error so the panel renders a preview list
  //                          with checkboxes without asking the user to
  //                          approve anything yet.
  //   consolidateIntoSelected — signs + broadcasts one send per chosen source.
  //                          The panel shows a single upfront confirmation
  //                          (with the total to move and total fees); Theseus's
  //                          per-tx approval overlay is skipped because the
  //                          batch itself is the user's explicit intent.
  api.onMessage("consolidatePreview", async (_p, m) => {
    fromPanel(m);
    const destId = selectedWalletId();
    if (!destId) throw new Error("no wallet selected");
    const destEntry = walletEntries().find((w) => w.id === destId);
    if (!destEntry) throw new Error("selected wallet not found");
    const destRt = ctx.runtimes.get(destId);
    if (!destRt?.adapter) throw new Error("destination wallet not ready");
    const destSnap = destRt.adapter.snapshot();
    const destAddr = destSnap.address;
    if (!destAddr) throw new Error("destination wallet has no receive address");
    const sources = walletEntries().filter((w) =>
      w.chain === destEntry.chain &&
      w.network === destEntry.network &&
      w.id !== destId,
    );
    const items = [];
    for (const src of sources) {
      const rt = ctx.runtimes.get(src.id);
      const snap = rt?.adapter?.snapshot?.() || {};
      const bal = snap.balance || {};
      const totalUnits = typeof bal.confirmed === "string"
        ? (BigInt(bal.confirmed || "0") + BigInt(bal.unconfirmed || "0")).toString()
        : String((bal.confirmed || 0) + (bal.unconfirmed || 0));
      const base = {
        walletId: src.id, label: src.label,
        address: snap.address || null,
        balance: totalUnits,
        fee: null, net: null, error: null, eligible: false,
      };
      if (!rt?.adapter) { items.push({ ...base, error: "adapter not mounted" }); continue; }
      if (typeof rt.adapter.plan !== "function") { items.push({ ...base, error: "adapter has no plan()" }); continue; }
      // Dry-run send-max to the destination. plan() throws on empty /
      // dust-only wallets — that's the "nothing to sweep" case and it
      // reads as an error string per source in the preview.
      try {
        const plan = await Promise.resolve(rt.adapter.plan({ to: destAddr, sendMax: true }));
        const fee = String(plan.fee ?? 0);
        const net = String(plan.recipients?.[0]?.value ?? 0);
        items.push({ ...base, fee, net, eligible: true });
      } catch (e) {
        items.push({ ...base, error: e?.message || String(e) });
      }
    }
    const meta = chainMeta(destEntry.chain, destEntry.network) || null;
    return {
      destinationWalletId: destId,
      destinationLabel: destEntry.label,
      destinationAddress: destAddr,
      chain: destEntry.chain,
      network: destEntry.network,
      ticker: meta?.ticker || "",
      decimals: meta?.decimals || 8,
      sources: items,
    };
  });

  api.onMessage("consolidateIntoSelected", async (p, m) => {
    fromPanel(m);
    requirePanelTxPin();
    const destId = selectedWalletId();
    if (!destId) throw new Error("no wallet selected");
    // The destination is the wallet the PREVIEW was drawn for, not whatever
    // is selected by the time the button is pressed: a preview painted for A
    // followed by a switch to B used to sweep everything into B.
    if (p && p.destinationWalletId && String(p.destinationWalletId) !== destId) {
      throw new Error("the selected wallet changed since this preview — reopen Consolidate");
    }
    const destEntry = walletEntries().find((w) => w.id === destId);
    if (!destEntry) throw new Error("selected wallet not found");
    const destRt = ctx.runtimes.get(destId);
    if (!destRt?.adapter) throw new Error("destination wallet not ready");
    const destAddr = destRt.adapter.snapshot().address;
    if (!destAddr) throw new Error("destination wallet has no receive address");
    // sourceIds are the wallets the user CHECKED. They are required: an
    // omitted list used to mean "every sibling wallet".
    if (!Array.isArray(p?.sourceIds) || !p.sourceIds.length) throw new Error("choose at least one wallet to consolidate");
    const requested = new Set(p.sourceIds.map(String));
    const sources = walletEntries().filter((w) =>
      w.chain === destEntry.chain &&
      w.network === destEntry.network &&
      w.id !== destId &&
      requested.has(w.id),
    );
    if (!sources.length) throw new Error("none of the chosen wallets can be consolidated into this one");

    // Plan every sweep first, then put the WHOLE batch on the host overlay.
    // This emptied wallets on the panel's say-so alone; every other spend
    // in Aegis is confirmed on a surface the panel cannot draw.
    const meta = chainMeta(destEntry.chain, destEntry.network);
    const dec = meta?.decimals ?? 8;
    const planned = [];
    const results = [];
    for (const src of sources) {
      const rt = ctx.runtimes.get(src.id);
      if (!rt?.adapter || typeof rt.adapter.plan !== "function") {
        results.push({ walletId: src.id, label: src.label, ok: false, error: "adapter not mounted" });
        continue;
      }
      try {
        const plan = await Promise.resolve(rt.adapter.plan({ to: destAddr, sendMax: true }));
        planned.push({ src, rt, plan });
      } catch (e) {
        results.push({ walletId: src.id, label: src.label, ok: false, error: e?.message || String(e) });
      }
    }
    if (planned.length) {
      let totalNet = 0n, totalFee = 0n;
      const rows = planned.slice(0, 12).map(({ src, plan }) => {
        const net = BigInt(String(plan.recipients?.[0]?.value ?? 0));
        const fee = BigInt(String(plan.fee ?? 0));
        totalNet += net; totalFee += fee;
        return { label: "Empty", value: `${src.label} — ${fmtValue(net.toString(), dec)} ${meta?.ticker || ""}`, mono: true };
      });
      for (const { plan } of planned.slice(12)) {
        totalNet += BigInt(String(plan.recipients?.[0]?.value ?? 0));
        totalFee += BigInt(String(plan.fee ?? 0));
      }
      if (planned.length > 12) rows.push({ label: "…", value: `and ${planned.length - 12} more wallets` });
      rows.push({ label: "Into", value: `${destEntry.label} — ${destAddr}`, mono: true });
      rows.push({ label: "Arrives", value: `${fmtValue(totalNet.toString(), dec)} ${meta?.ticker || ""}`, strong: true });
      rows.push({ label: "Fees", value: `${fmtValue(totalFee.toString(), dec)} ${meta?.ticker || ""} across ${planned.length} transaction${planned.length === 1 ? "" : "s"}` });
      const pick = await api.approvalModal({
        title: `Consolidate ${planned.length} wallet${planned.length === 1 ? "" : "s"}?`,
        origin: "Aegis wallet panel",
        body: "Each wallet listed is emptied into the destination in its own transaction. This cannot be undone.",
        rows,
        actions: [{ id: "send", label: "Consolidate", primary: true }],
      });
      if (pick !== "send") throw new Error("cancelled");
    }
    for (const { src, rt, plan } of planned) {
      try {
        const r = await rt.adapter.signAndBroadcast(plan);
        results.push({
          walletId: src.id, label: src.label, ok: true,
          txid: r?.txid || null,
          sent: String(plan.recipients?.[0]?.value ?? 0),
          fee: String(plan.fee ?? 0),
        });
      } catch (e) {
        results.push({ walletId: src.id, label: src.label, ok: false, error: e?.message || String(e) });
      }
    }
    // Force a refresh on the destination so its balance jumps once the txs
    // reach the network's mempool. Silent-fail — panel will pick up state
    // on the next state emit anyway.
    try { if (typeof destRt.adapter.refresh === "function") destRt.adapter.refresh(false); } catch {}
    return {
      destinationWalletId: destId,
      destinationAddress: destAddr,
      chain: destEntry.chain,
      network: destEntry.network,
      results,
    };
  });

  // ---- promote an import to an HD wallet ----------------------------------
  //
  // A wallet imported from a single private key cannot do WizardConnect: the
  // handshake ships BIP32 xpubs so the dapp can derive addresses on its own,
  // and a lone key has no chain code to build one from. Nothing Aegis can do
  // locally fixes that — manufacturing a parent whose child equals a given
  // key means inverting HMAC-SHA512. The way out is to stop being a
  // single-key wallet: derive a proper HD wallet from the vault and sweep the
  // imported key into it.
  //
  // Only BCH imports can do this. The BTC/DGB/ETH/TRX/SOL imported adapters
  // still throw "read-only" from plan(), so there is no sweep to run.
  function promotableImport(walletId) {
    const entry = walletEntries().find((w) => w.id === String(walletId || ""));
    if (!entry) throw new Error("unknown wallet");
    if (entry.kind !== "imported") throw new Error("this wallet is already derived from your vault");
    if (entry.chain !== "bch") {
      throw new Error(`Imported ${String(entry.chain).toUpperCase()} wallets are still read-only, so there is nothing to sweep with yet. Only BCH imports can be promoted today.`);
    }
    const rt = ctx.runtimes.get(entry.id);
    if (!rt?.adapter || rt.phase !== "ready") throw new Error("wallet is still loading — try again in a moment");
    return { entry, rt };
  }

  // Open the wallet as a full Theseus tab. It loads panel.html — the very
  // same file the sidebar uses — with ?surface=web, because an add-on's own
  // tab is handed the same window.silentmode surface and main dispatches it
  // as from:"panel". So this is a re-layout, not a second wallet: one set of
  // handlers, one UI, no drift between the two.
  api.onMessage("openFullScreen", (_p, m) => {
    fromPanel(m);
    if (typeof api.openTab !== "function") {
      throw new Error("This Theseus build can't open add-on tabs — update Theseus.");
    }
    api.openTab("panel.html", { query: { surface: "web" } });
    return true;
  });

  api.onMessage("promotePreview", async (p, m) => {
    fromPanel(m);
    const { entry, rt } = promotableImport(p && p.walletId);
    const snap = rt.adapter.snapshot();
    const meta = chainMeta(entry.chain, entry.network);
    // Cost the sweep WITHOUT creating the destination wallet first, so
    // cancelling the preview leaves nothing behind. A send-max to our own
    // address spends the same UTXOs into the same single P2PKH output, so
    // the fee is identical to the real sweep — only the output's 20-byte
    // hash differs, and that does not change the transaction's size.
    let fee = null, net = null, error = null;
    try {
      const plan = await Promise.resolve(rt.adapter.plan({ to: snap.address, sendMax: true }));
      fee = String(plan.fee ?? 0);
      net = String(plan.recipients?.[0]?.value ?? 0);
    } catch (e) { error = e?.message || String(e); }
    return {
      walletId: entry.id, label: entry.label,
      chain: entry.chain, network: entry.network,
      networkLabel: meta?.networkLabel || entry.network,
      ticker: meta?.ticker || "", decimals: meta?.decimals || 8,
      address: snap.address || null,
      balance: snap.balance || null,
      fee, net, error,
      suggestedLabel: `${entry.label} (HD)`,
    };
  });

  api.onMessage("promoteToHd", async (p, m) => {
    fromPanel(m);
    requirePanelTxPin();
    const { entry, rt } = promotableImport(p && p.walletId);
    const dest = await createVaultWallet({
      chain: entry.chain, network: entry.network,
      label: String(p && p.label || "") || `${entry.label} (HD)`,
    });
    const destRt = ctx.runtimes.get(dest.id);
    const destAddr = destRt?.adapter?.snapshot?.()?.address;
    if (!destAddr) throw new Error("the new wallet came up without a receive address — nothing was moved");

    let plan;
    try {
      plan = await Promise.resolve(rt.adapter.plan({ to: destAddr, sendMax: true }));
    } catch (e) {
      // Nothing was broadcast, so the empty wallet we just made is pure
      // litter — take it back out. Past this point we keep it even on
      // failure, because a transaction may already be on the wire and its
      // destination must stay visible.
      try { unmountWallet(dest.id); writeWallets(ctx.api, walletEntries().filter((w) => w.id !== dest.id)); } catch {}
      ctx.api.storage.set("selectedWalletId", entry.id);
      emitState();
      throw e;
    }

    const sent = String(plan.recipients?.[0]?.value ?? 0);
    const fee = String(plan.fee ?? 0);
    const r = await rt.adapter.signAndBroadcast(plan);
    // The import keeps its key on purpose. The sweep is unconfirmed for now,
    // and anyone who still has the old address can pay into it — removing
    // the key here would strand those coins. The panel offers removal as a
    // separate step once the balance has actually gone to zero.
    try { rt.adapter.refresh(false); } catch {}
    try { destRt.adapter.refresh(false); } catch {}
    emitState();
    return {
      ok: true, txid: r?.txid || null, sent, fee,
      fromWalletId: entry.id, fromLabel: entry.label,
      newWalletId: dest.id, newWalletLabel: dest.label, newAddress: destAddr,
      ticker: chainMeta(entry.chain, entry.network)?.ticker || "",
      decimals: chainMeta(entry.chain, entry.network)?.decimals || 8,
    };
  });

  api.onMessage("recovery", async (p, m) => {
    fromPanel(m);
    const id = String(p && p.id || selectedWalletId());
    const rt = requireWallet(id);
    if (typeof rt.adapter.recovery !== "function") throw new Error("this chain does not expose recovery details");
    const r = rt.adapter.recovery();
    // Public material only. Revealing a secret goes through revealSecret,
    // which proves the master password first — this used to hand back the
    // xprv behind nothing but an approval click.
    return { accountPath: r.accountPath, xpub: r.xpub, purpose: rt.entry.purpose };
  });

  // ---- reveal a wallet's secret ------------------------------------------
  // Authorisation is the master password, and it is verified HERE rather
  // than taken on trust from the panel: the PIN route never touches
  // vaultUnlock, so without this check the only thing between a secret and
  // the screen would be panel-side logic. The panel gets the password either
  // by decrypting the PIN blob (which wraps exactly this) or by asking.
  //
  // What comes back is NOT a recovery phrase, because no BIP39 mnemonic is
  // stored anywhere in Aegis or the Theseus vault. An import keeps
  // mnemonicToSeedHex(words) and discards the words (PBKDF2, one-way), and a
  // vault wallet is HKDF(vault root, purpose) and never had words of its
  // own — password-vault.js is explicit that the seed is never persisted.
  // Calling any of this a "recovery phrase" in the UI would be a lie that
  // costs someone their backup, so every form names itself and says where it
  // can actually be restored.
  api.onMessage("revealSecret", async (p, m) => {
    fromPanel(m);
    const pw = String((p && p.masterPassword) || "");
    if (!pw) throw new Error("master password required");
    try { await api.vault.lifecycle.unlock(pw); }
    catch (e) {
      // A missing or unset-up vault is a structural failure, not a bad
      // password — don't accuse the user of mistyping something that was
      // never going to work.
      const msg = e?.message || String(e);
      if (/no vault|not set up/i.test(msg)) throw new Error(msg);
      throw new Error("wrong master password");
    }
    noteMasterVerified(api);

    const id = String((p && p.walletId) || selectedWalletId() || "");
    const entry = walletEntries().find((w) => w.id === id);
    if (!entry) throw new Error("no such wallet");
    const meta = chainMeta(entry.chain, entry.network);
    const base = {
      walletId: entry.id, label: entry.label, chain: entry.chain,
      coinLabel: meta?.coinLabel || entry.chain,
      networkLabel: meta?.networkLabel || entry.network,
      address: ctx.runtimes.get(entry.id)?.adapter?.snapshot()?.address || null,
    };

    if (entry.kind === "imported") {
      if (!api.vault?.imports || typeof api.vault.imports.signer !== "function") {
        throw new Error("this build cannot read imported keys");
      }
      const blob = await api.vault.imports.signer(entry.importId);
      if (blob.kind === "wif") {
        // ETH/TRX/SOL raw hex keys ride in the wif slot behind a scheme
        // prefix (see importWallet) — unwrap so the user sees the key.
        const w = String(blob.wif || "");
        const PRIVHEX = "aegis-privhex:";
        return w.startsWith(PRIVHEX)
          ? { ...base, form: "privhex", secret: w.slice(PRIVHEX.length) }
          : { ...base, form: "wif", secret: w };
      }
      if (blob.kind === "seed") {
        return { ...base, form: "seed", secret: String(blob.seed || ""), path: blob.path || null };
      }
      throw new Error("unknown import kind: " + blob.kind);
    }

    // Vault-derived. Two genuinely useful forms: the account xprv, which
    // other HD wallets accept, and the 32-byte purpose root Aegis derives
    // from. Sia's recovery() calls its seed "xprv" and it is the same bytes
    // as the root, so don't report it twice.
    let xprv = null, xpub = null, accountPath = null;
    const rt = ctx.runtimes.get(entry.id);
    if (rt && rt.adapter && typeof rt.adapter.recovery === "function") {
      try {
        const r = rt.adapter.recovery();
        xpub = r.xpub || null;
        accountPath = r.accountPath || null;
        if (entry.chain !== "sc") xprv = r.xprv || null;
      } catch { /* public material is a bonus, not the point */ }
    }
    const root = await api.vault.derive(entry.purpose);
    let rootHex = "";
    try { rootHex = Array.from(root, (b) => b.toString(16).padStart(2, "0")).join(""); }
    finally { try { root.fill(0); } catch {} }
    return { ...base, form: "vault", secret: rootHex, purpose: entry.purpose, xprv, xpub, accountPath };
  });

  // Opt-in USD prices. Persist the choice so restart doesn't silently
  // disable it, and kick a fetch immediately when switched on.
  api.onMessage("setPricesEnabled", async (p, m) => {
    fromPanel(m);
    const on = !!(p && p.enabled);
    api.storage.set("pricesEnabled", on);
    if (ctx.priceFeed) await ctx.priceFeed.setEnabled(on);
    return fullState();
  });
  api.onMessage("refreshPrices", async (_p, m) => {
    fromPanel(m);
    if (ctx.priceFeed) await ctx.priceFeed.refresh();
    return fullState();
  });
  api.onMessage("setPricesSource", async (p, m) => {
    fromPanel(m);
    const id = String(p && p.source || "").trim();
    if (!id) throw new Error("source required");
    api.storage.set("pricesSource", id);
    if (ctx.priceFeed) await ctx.priceFeed.setSource(id);
    return fullState();
  });

  // WizardConnect: pair a wiz:// URI with a specific BCH wallet.
  api.onMessage("wcConnect", async (p, m) => {
    fromPanel(m);
    if (!ctx.wc) throw new Error("WizardConnect not ready");
    const walletId = String(p && p.walletId || "");
    const uri = String(p && p.uri || "");
    await ctx.wc.connectUri(walletId, uri);
    return fullState();
  });
  api.onMessage("wcDisconnect", async (p, m) => {
    fromPanel(m);
    if (!ctx.wc) throw new Error("WizardConnect not ready");
    await ctx.wc.disconnect(String(p && p.walletId || ""), String(p && p.connId || ""));
    return fullState();
  });

  // Scan the open dapp tab for a wiz:// pairing code, for dapps that render
  // one but haven't adopted window.wizardconnect. Strictly user-initiated —
  // it runs when someone presses "Scan page", never on a timer and never in
  // the background. The host does the matching and returns only the URIs, so
  // Aegis never receives page content.
  api.onMessage("wcScanPage", async (_p, m) => {
    fromPanel(m);
    if (typeof api.scanActiveTabForUris !== "function") {
      throw new Error("This Theseus build can't scan pages yet — update Theseus, or paste the wiz:// code manually.");
    }
    const { origin, uris } = await api.scanActiveTabForUris({ scheme: "wiz", limit: 10 });
    return { origin: origin || null, uris: Array.isArray(uris) ? uris : [] };
  });

  // ---- WizardConnect from the page (0.8.8) --------------------------------
  //
  // WC was built for cross-device pairing: the dapp renders a QR, a phone
  // scans it. Same-device that means copying a wiz:// string out of one
  // tab and into the wallet by hand. These two handlers back the
  // window.wizardconnect bridge so a dapp can hand Aegis the URI it has
  // already generated, and the user just approves.

  // Which BCH wallets can actually pair right now. Used by the page bridge
  // AND by isReady() so a dapp can decide between "hand it to Aegis" and
  // "render the QR" before it commits to either.
  function wcPairableWallets() {
    if (!ctx.wc) return [];
    return walletEntries()
      .filter((w) => w.chain === "bch")
      .map((w) => ({ entry: w, rt: ctx.runtimes.get(w.id) }))
      .filter(({ entry, rt }) => rt && rt.phase === "ready" && !wcIneligible.has(entry.id))
      .map(({ entry }) => entry);
  }

  api.onMessage("wcPageReady", async (_p, m) => {
    fromPage(m);
    // Deliberately coarse: a page learns only whether pairing is possible,
    // never how many wallets exist or what they are.
    return { available: !!ctx.wc, pairable: wcPairableWallets().length > 0 };
  });

  api.onMessage("wcConnectFromPage", async (p, m) => {
    const origin = fromPage(m);
    if (!ctx.wc) throw new Error("WizardConnect is still starting up — try again in a moment");
    const uri = String(p && p.uri || "").trim();
    // Validate before showing any UI so a malformed or hostile value can't
    // put a confusing approval in front of the user.
    if (!/^wiz:\/\//i.test(uri)) throw new Error("not a WizardConnect URI");
    if (uri.length > 4096) throw new Error("WizardConnect URI is implausibly long");
    const candidates = wcPairableWallets();
    if (!candidates.length) {
      throw new Error("No Bitcoin Cash wallet is ready to pair. Unlock the Aegis vault (or add a BCH wallet) and try again.");
    }
    // Which wallet to offer first: the one nominated for WizardConnect, else
    // the one the panel is showing, else list order. Whatever wins is only a
    // default — with more than one candidate the approval lets the user say.
    const wcRole = walletRoles().wizardconnect;
    const selId = selectedWalletId();
    const preferred = candidates.find((w) => w.id === wcRole)
      || candidates.find((w) => w.id === selId)
      || candidates[0];
    // Default first: approval.html renders options in order, so the browser
    // selects the head of the list.
    const ordered = [preferred, ...candidates.filter((w) => w.id !== preferred.id)];
    const addrOf = (w) => {
      try { return ctx.runtimes.get(w.id)?.adapter?.snapshot()?.address || ""; }
      catch { return ""; }
    };
    // The address, not just the label — "I don't recognise the connected
    // wallet" is the failure this dialog has to prevent, and a label the user
    // never chose ("BCH wallet 2") does not prevent it.
    const describe = (w) => {
      const a = addrOf(w);
      return a ? `${w.label} · ${shortAddr(a)}` : w.label;
    };
    const choose = ordered.length > 1;
    // With a choice on offer the dropdown is the only honest statement of
    // which wallet pairs: the rows are static, so a "Wallet: X" line above a
    // select the user just changed to Y would contradict itself. Each option
    // therefore carries its own short address, and the full-address row shows
    // only when there is nothing to choose.
    const rows = choose
      ? [{ label: "Pairing code", value: uri.slice(0, 48) + (uri.length > 48 ? "…" : ""), mono: true }]
      : [
        { label: "Wallet", value: preferred.label, strong: true },
        { label: "Address", value: addrOf(preferred) || "—", mono: true },
        { label: "Pairing code", value: uri.slice(0, 48) + (uri.length > 48 ? "…" : ""), mono: true },
      ];
    return withOriginLock(origin, async () => {
      const pick = await api.approvalModal({
        title: "Pair this site with your wallet?",
        origin,
        body: "The site will be able to ask Aegis to sign Bitcoin Cash transactions over WizardConnect. Every signature still needs your approval — pairing on its own moves no funds.",
        rows,
        actions: [{ id: "allow", label: "Pair", primary: true }],
        select: choose ? {
          id: "wallet", label: "Pair with",
          options: ordered.map((w) => ({ value: w.id, label: describe(w) })),
        } : null,
      });
      const [action, ...flags] = String(pick || "").split("+");
      if (action !== "allow") throw new Error("pairing declined");
      const picked = flags.find((f) => f.startsWith("wallet="));
      const pickedId = picked ? picked.slice(7) : "";
      // Re-check against the candidate list: main validates the value came
      // from the options we offered, but the wallet could have gone away
      // while the dialog was open.
      const chosen = candidates.find((w) => w.id === pickedId) || preferred;
      await ctx.wc.connectUri(chosen.id, uri);
      return { paired: true, wallet: chosen.label };
    });
  });

  // Reorder wallets by an explicit ID list. Silently drops IDs that are
  // not in the current wallet set (removed since the panel last read);
  // appends any wallets missing from `order` to the end of the list so a
  // stale panel reorder cannot make a wallet vanish from the strip.
  api.onMessage("reorderWallets", (p, m) => {
    fromPanel(m);
    const order = Array.isArray(p && p.order) ? p.order.map(String) : [];
    const current = walletEntries();
    const byId = new Map(current.map((w) => [w.id, w]));
    const next = [];
    const seen = new Set();
    for (const id of order) {
      if (byId.has(id) && !seen.has(id)) { next.push(byId.get(id)); seen.add(id); }
    }
    for (const w of current) if (!seen.has(w.id)) next.push(w);
    writeWallets(api, next);
    emitState();
    return fullState();
  });

  // Which wallet each purpose reaches for. Panel-only: a page must never be
  // able to read the whole wallet set, let alone re-point a role at one.
  api.onMessage("walletRoles", (_p, m) => { fromPanel(m); return walletRoles(); });
  api.onMessage("setWalletRole", (p, m) => {
    fromPanel(m);
    const role = String(p && p.role || "");
    const id = p && p.walletId ? String(p.walletId) : null;
    setWalletRole(role, id);
    emitState();
    // Full state, not just the role map — the panel assigns this straight
    // onto `state`, and the badges it drives live on the wallet rows.
    return fullState();
  });

  // ---- seed import: which derivation path actually holds the funds? -------
  // The import form prefilled exactly one path, so a seed from a wallet that
  // used a different one imported a valid, empty address and reported 0 with
  // no way to tell "wrong path" from "empty wallet". Both real cases hit it:
  // Bitcoin.com derives mainnet BCH from coin type 0' (its Copay lineage
  // predates the 145' split), and chipnet tooling generally uses 145' rather
  // than BIP44's testnet 1' — which is what Aegis defaulted chipnet to.
  //
  // So ask the chain instead of guessing. Each candidate is scanned for
  // history and balance, and the panel reports what it found.
  const SEED_PATH_CANDIDATES = {
    "bch/mainnet": [
      { path: "m/44'/145'/0'/0/0", note: "BCH standard — Electron Cash, Zapit, newer Bitcoin.com" },
      { path: "m/44'/0'/0'/0/0", note: "BTC coin type — Bitcoin.com, Copay, BitPay" },
      { path: "m/44'/145'/0'", note: "account node — some QR exports" },
      { path: "m/0'/0/0", note: "pre-BIP44" },
    ],
    // DigiByte. Both master-key variants are covered, because the 2018-19
    // official mobile wallets (BreadWallet forks) used HMAC "DigiByte seed"
    // instead of BIP32's "Bitcoin seed" — the same words then produce a
    // completely different key tree and a standard scan finds nothing.
    // Finding from Digibyte.X/dgb-wallet @ 989a2696.
    "dgb/mainnet": [
      { path: "m/84'/20'/0'/0/0", note: "BIP84 native SegWit — dgb1q…, the modern default" },
      { path: "m/44'/20'/0'/0/0", note: "BIP44 legacy — D…" },
      { path: "m/49'/20'/0'/0/0", note: "BIP49 wrapped SegWit — S…" },
      { path: "m/86'/20'/0'/0/0", note: "BIP86 Taproot — dgb1p…" },
      { path: "m/0'/0/0", note: "official 2018-19 mobile wallet", hmacKey: "DigiByte seed" },
      { path: "m/44'/20'/0'/0/0", note: "BIP44 with the 2018-19 mobile master key", hmacKey: "DigiByte seed" },
    ],
    "bch/chipnet": [
      { path: "m/44'/145'/0'/0/0", note: "BCH coin type on chipnet — most chipnet tooling" },
      { path: "m/44'/1'/0'/0/0", note: "BIP44 testnet coin type" },
      { path: "m/44'/145'/0'", note: "account node" },
    ],
  };
  api.onMessage("seedPathCandidates", (p, m) => {
    fromPanel(m);
    const key = `${String(p && p.chain || "")}/${String(p && p.network || "")}`;
    return { key, candidates: (SEED_PATH_CANDIDATES[key] || []).map((c) => ({ ...c })) };
  });

  api.onMessage("scanSeedPaths", async (p, m) => {
    fromPanel(m);
    const chain = String(p && p.chain || "bch");
    const network = String(p && p.network || "");
    const cands = SEED_PATH_CANDIDATES[`${chain}/${network}`];
    if (!cands) throw new Error(`Path scanning is not available for ${chain} ${network} yet.`);
    const mnemonic = String(p && p.mnemonic || "").trim();
    if (!mnemonic) throw new Error("seed phrase required");
    // Same conversion importWallet does. Never stored here — this handler
    // derives, queries and returns counts, nothing else.
    let seedHex;
    try { seedHex = ctx.d.derive.mnemonicToSeedHex(mnemonic); }
    catch (e) { throw new Error("That does not look like a BIP39 seed phrase: " + (e?.message || e)); }

    // Per-chain: where to ask, how to turn a path into an address, and how to
    // key a script for Electrum. Everything below is chain-agnostic.
    let servers, addressAt, scripthashOf;
    if (chain === "bch") {
      const prefix = network === "mainnet" ? "bitcoincash" : "bchtest";
      servers = network === "mainnet"
        ? bchServerList(api)
        : ["wss://chipnet.imaginary.cash:50004", "wss://chipnet.bch.ninja:50004"];
      addressAt = (pth) => deriveCashaddrFromSeed(seedHex, pth, prefix);
      scripthashOf = (addr) => {
        const d = ctx.d.cashaddr.decode(addr);
        const h = Buffer.from(d.hash);
        const spk = d.type === 1
          ? Buffer.concat([Buffer.from([0xa9, 0x14]), h, Buffer.from([0x87])])
          : Buffer.concat([Buffer.from([0x76, 0xa9, 0x14]), h, Buffer.from([0x88, 0xac])]);
        return Buffer.from(ctx.d.sha256(new Uint8Array(spk))).reverse().toString("hex");
      };
    } else if (chain === "dgb") {
      if (!ctx.d.dgbCore) throw new Error("the DigiByte modules did not load, so paths cannot be scanned");
      servers = ["wss://electrum1.cipig.net:20063", "wss://electrum2.cipig.net:20063"];
      // hmacKey rides on the candidate, so both master-key variants are
      // scanned in the same pass.
      addressAt = (pth, hmacKey) => ctx.d.derive.dgb.fromSeed(seedHex, pth, hmacKey);
      scripthashOf = (addr) => {
        // bitcoinjs knows every DGB output type (D…, S…, dgb1q…, dgb1p…),
        // so let it build the scriptPubKey rather than hand-rolling four.
        const spk = ctx.d.bitcoinjs.address.toOutputScript(addr, ctx.d.dgbCore.digibyte);
        return Buffer.from(ctx.d.sha256(new Uint8Array(spk))).reverse().toString("hex");
      };
    } else {
      throw new Error(`Path scanning is not available for ${chain} yet.`);
    }
    const client = new ctx.d.electrum.Client(servers);
    // Look a few addresses deep per candidate: a wallet whose first receive
    // address is spent clean still has history, and funds often sit further
    // along the branch.
    const DEPTH = 5;
    const out = [];
    try {
      for (const c of cands) {
        const acct = wcAccountPath(c.path) || c.path;
        const probes = [];
        for (let i = 0; i < DEPTH; i++) probes.push(`${acct}/0/${i}`);
        // The exact path the user would be importing, in case it is a leaf
        // outside the account/0/i shape we probe.
        if (!probes.includes(c.path) && /\/\d+$/.test(c.path)) probes.unshift(c.path);
        let balance = 0, txCount = 0, firstAddress = null, fundedAddress = null;
        for (const [idx, pth] of probes.entries()) {
          let addr;
          try { addr = addressAt(pth, c.hmacKey); }
          catch { continue; }
          if (idx === 0 || firstAddress === null) firstAddress = firstAddress || addr;
          const sh = scripthashOf(addr);
          try {
            const bal = await client.call("blockchain.scripthash.get_balance", [sh]);
            const got = Number(bal?.confirmed || 0) + Number(bal?.unconfirmed || 0);
            if (got > 0 && !fundedAddress) fundedAddress = addr;
            balance += got;
            const hist = await client.call("blockchain.scripthash.get_history", [sh]);
            txCount += Array.isArray(hist) ? hist.length : 0;
          } catch (e) { api.log("scanSeedPaths:", pth, e?.message || e); }
        }
        out.push({
          path: c.path, note: c.note, accountPath: acct, hmacKey: c.hmacKey || null,
          firstAddress, fundedAddress, balance, txCount, scanned: probes.length,
        });
      }
    } finally { try { client.disconnect(); } catch {} }
    const meta = chainMeta(chain, network);
    return {
      chain, network, decimals: meta?.decimals || 8, ticker: meta?.ticker || "BCH",
      results: out,
      // Rank for the panel: funds first, then any history at all.
      best: out.slice().sort((a, b) => (b.balance - a.balance) || (b.txCount - a.txCount))[0]?.path || null,
    };
  });

  // ---- who can see the wallet --------------------------------------------
  const injectState = () => ({
    supported: !!(api.features && api.features.pageInjectPolicy),
    mode: injectMode(api),
    origins: injectAllowList(api),
  });
  api.onMessage("injectPolicyGet", (_p, m) => { fromPanel(m); return injectState(); });
  api.onMessage("injectPolicySet", (p, m) => {
    fromPanel(m);
    if (!(api.features && api.features.pageInjectPolicy)) throw new Error("this Theseus cannot limit which sites see the wallet — update Theseus");
    api.storage.set(INJECT_MODE_KEY, p && p.mode === "allowed" ? "allowed" : "all");
    syncInjectPolicy(api);
    return injectState();
  });
  // Enable one site. With no origin given it is the site in the active tab,
  // which the host reports — the panel never has to type or guess a URL.
  api.onMessage("injectAllowSite", async (p, m) => {
    fromPanel(m);
    let origin = normalizeOrigin(p && p.origin);
    if (!origin && typeof api.scanActiveTabForUris === "function") {
      try { origin = normalizeOrigin((await api.scanActiveTabForUris({ scheme: "wiz", limit: 1 })).origin); } catch {}
    }
    if (!origin) throw new Error("Open the site in a tab first — there is no web page in the active tab.");
    const list = injectAllowList(api);
    if (!list.includes(origin)) list.push(origin);
    api.storage.set(INJECT_ALLOW_KEY, list);
    syncInjectPolicy(api);
    return { origin, ...injectState() };
  });
  api.onMessage("injectRemoveSite", (p, m) => {
    fromPanel(m);
    const origin = String(p && p.origin || "");
    api.storage.set(INJECT_ALLOW_KEY, injectAllowList(api).filter((o) => o !== origin));
    syncInjectPolicy(api);
    return injectState();
  });
  try { syncInjectPolicy(api); } catch {}

  api.onMessage("permissions", (_p, m) => { fromPanel(m); return grantsForPanel(api); });
  api.onMessage("revoke", (p, m) => {
    fromPanel(m);
    revokeOrigin(api, String(p && p.origin || ""));
    emitState();
    return grantsForPanel(api);
  });

  // ---- security: quick-access PIN + policy flags ------------------------
  // The PIN blob is a WebCrypto AES-GCM ciphertext of the master password,
  // derived from PBKDF2(pin, salt). Panel handles the actual encryption /
  // decryption inside its iframe — the master password never crosses the
  // process boundary except via vaultUnlock. These handlers only shuttle
  // the opaque blob + a small policy object in and out of api.storage.
  // Set or replace the PIN. The master password is checked against the vault
  // first, and the blob is built here, so the panel never holds one.
  api.onMessage("pinSet", async (p, m) => {
    fromPanel(m);
    const pin = String((p && p.pin) || "");
    const pw = String((p && p.masterPassword) || "");
    if (!PIN_RE.test(pin)) throw new Error("the PIN must be 6 digits");
    if (!pw) throw new Error("master password required");
    try { await api.vault.lifecycle.unlock(pw); }
    catch { throw new Error("wrong master password"); }
    noteMasterVerified(api);
    api.storage.set(PIN_BLOB_KEY, sealPinBlob(api, await pinWrap(pin, pw)));
    return true;
  });
  // Try a PIN. Counts the guess before trying it, so a crash or a closed
  // panel mid-check still costs an attempt. Answers
  //   { ok: true, masterPassword } | { ok: false, remaining, requireMaster }
  api.onMessage("pinUnwrap", async (p, m) => {
    fromPanel(m);
    const pin = String((p && p.pin) || "");
    const blob = openPinBlob(api);
    if (!blob) throw new Error("no PIN is set");
    if (pinFails(api).requireMaster) return { ok: false, remaining: 0, requireMaster: true };
    const before = pinFails(api).fails;
    api.storage.set("aegis/pin/failCount", before + 1);
    let pw = null;
    if (PIN_RE.test(pin)) { try { pw = await pinUnwrapBlob(pin, blob); } catch { pw = null; } }
    if (pw == null) {
      const fails = before + 1;
      if (fails >= PIN_MAX_FAILS) api.storage.set("aegis/pin/requireMaster", true);
      return { ok: false, remaining: Math.max(0, PIN_MAX_FAILS - fails), requireMaster: fails >= PIN_MAX_FAILS };
    }
    api.storage.set("aegis/pin/failCount", 0);
    // A blob from an older build (200k iterations, or from before sealing)
    // is re-made now, under a fresh salt, while the PIN is at hand.
    if ((Number(blob.iters) || 0) < PIN_ITERS) {
      try { api.storage.set(PIN_BLOB_KEY, sealPinBlob(api, await pinWrap(pin, pw))); } catch (e) { api.log("PIN re-wrap:", e?.message || e); }
    }
    return { ok: true, masterPassword: pw };
  });
  api.onMessage("pinStatus", (_p, m) => {
    fromPanel(m);
    const f = pinFails(api);
    return { hasPin: !!api.storage.get(PIN_BLOB_KEY, null), fails: f.fails, maxFails: PIN_MAX_FAILS, requireMaster: f.requireMaster };
  });
  api.onMessage("pinBlobClear", (_p, m) => {
    fromPanel(m);
    api.storage.set("aegis/pin/v1", null);
    api.storage.set("aegis/pin/failCount", 0);
    api.storage.set("aegis/pin/requireMaster", false);
    // Drop the gate record as well, so enrolling a new PIN later starts from
    // "not yet satisfied" rather than inheriting the old PIN's clearance.
    api.storage.set("aegis/pin/gate", null);
    return true;
  });

  // When to ask for the PIN. These are independent triggers, not a single
  // mode: wanting one at startup and one per transaction is a normal
  // combination. Previously the only control was requirePinForSending, which
  // produced the behaviour the user reported — Aegis opens unlocked after a
  // restart (safeStorage remembered the password) and then demands a PIN the
  // moment you touch something. Asking at the door or not at all is
  // coherent; asking only once you are inside is not.
  //
  // `restart` defaults ON for a wallet that otherwise reopens fully unlocked.
  // `transaction` inherits the old requirePinForSending so nobody silently
  // loses a gate they had chosen.
  function pinPolicy() {
    const cfg = api.storage.get("aegis/security/v1", {}) || {};
    const on = (cfg.pinOn && typeof cfg.pinOn === "object") ? cfg.pinOn : null;
    return {
      restart: on ? !!on.restart : true,
      launch: on ? !!on.launch : false,
      interval: on ? !!on.interval : false,
      transaction: on ? !!on.transaction : !!cfg.requirePinForSending,
    };
  }
  const pinGate = () => {
    const g = api.storage.get("aegis/pin/gate", null);
    return (g && typeof g === "object") ? g : {};
  };

  // Does the user have to prove the PIN right now? Decided host-side: the
  // panel reloads freely and must not be the thing that remembers whether a
  // gate was already satisfied.
  function pinNeeded(event) {
    if (!api.storage.get("aegis/pin/v1", null)) return { needPin: false, reason: "no-pin" };
    const on = pinPolicy();
    const g = pinGate();
    if (on.interval) {
      // Never satisfied, or satisfied too long ago. Checked for every event
      // so a six-hour expiry also lands on the next transaction.
      if (!g.lastOkAt || (Date.now() - Number(g.lastOkAt)) > PIN_INTERVAL_MS) {
        return { needPin: true, reason: "interval" };
      }
    }
    if (event === "transaction" && on.transaction) return { needPin: true, reason: "transaction" };
    if (event === "panel-load") {
      if (on.launch) return { needPin: true, reason: "launch" };
      if (on.restart && g.bootId !== BOOT_ID) return { needPin: true, reason: "restart" };
    }
    return { needPin: false, reason: "satisfied" };
  }

  api.onMessage("pinGateStatus", (p, m) => {
    fromPanel(m);
    const event = String(p && p.event || "panel-load");
    return { ...pinNeeded(event), event, policy: pinPolicy() };
  });
  // The panel decrypts the PIN blob and hands over what was inside it. That
  // is the vault master password, and the host checks it against the vault
  // itself — so a gate is cleared by proof the host verified, not by the
  // panel saying so. The same proof opens a single-use transaction
  // clearance (see requirePanelTxPin / requireDappTxPin).
  api.onMessage("pinGateSatisfied", async (p, m) => {
    fromPanel(m);
    const pw = String((p && p.masterPassword) || "");
    if (!pw) throw new Error("PIN proof required");
    if (!api.vault?.lifecycle || typeof api.vault.lifecycle.unlock !== "function") throw new Error("this build cannot verify a PIN");
    try { await api.vault.lifecycle.unlock(pw); }
    catch { throw new Error("PIN proof rejected"); }
    noteMasterVerified(api);
    api.storage.set("aegis/pin/gate", { lastOkAt: Date.now(), bootId: BOOT_ID });
    txClearanceUntil = Date.now() + TX_CLEARANCE_MS;
    return true;
  });
  // A panel opened while a dapp transaction is waiting for the PIN picks the
  // request up here; one already open gets the "pinRequest" event instead.
  api.onMessage("pinRequestPending", (_p, m) => {
    fromPanel(m);
    return pendingPinRequest ? { ...pendingPinRequest } : null;
  });
  ctx.pinNeeded = pinNeeded;
  // Seal a plain blob left by an older build now, not when the panel next
  // happens to open.
  try { openPinBlob(api); } catch {}

  api.onMessage("securityGet", (_p, m) => {
    fromPanel(m);
    const cfg = api.storage.get("aegis/security/v1", {}) || {};
    return {
      hasPin: !!api.storage.get("aegis/pin/v1", null),
      pinRequireMaster: pinFails(api).requireMaster,
      pinOn: pinPolicy(),
      pinIntervalHours: PIN_INTERVAL_MS / 3600000,
      requirePinForSending: !!cfg.requirePinForSending,
      // Defaults ON (note the !== false), unlike the send flag: a send is
      // already fronted by an approval overlay, whereas revealing a key is
      // irreversible the moment it is on screen. Turning this off does not
      // make a secret free to read — it moves the prompt to the master
      // password, which is the stronger credential, not a weaker one.
      requirePinForReveal: cfg.requirePinForReveal !== false,
    };
  });
  api.onMessage("securitySet", (p, m) => {
    fromPanel(m);
    const cur = api.storage.get("aegis/security/v1", {}) || {};
    const next = { ...cur };
    if (p && typeof p.requirePinForSending === "boolean") next.requirePinForSending = p.requirePinForSending;
    if (p && typeof p.requirePinForReveal === "boolean") next.requirePinForReveal = p.requirePinForReveal;
    if (p && p.pinOn && typeof p.pinOn === "object") {
      // Write the whole set from the current policy plus the keys given, so
      // the first edit materialises the migrated defaults instead of leaving
      // three triggers undefined and one set.
      const cur = pinPolicy();
      const merged = { ...cur };
      for (const k of ["restart", "launch", "interval", "transaction"]) {
        if (typeof p.pinOn[k] === "boolean") merged[k] = p.pinOn[k];
      }
      next.pinOn = merged;
      // The legacy flag now lives in pinOn.transaction; keep them in step so
      // an older build reading this store still gates sends the same way.
      next.requirePinForSending = merged.transaction;
    }
    api.storage.set("aegis/security/v1", next);
    return {
      hasPin: !!api.storage.get("aegis/pin/v1", null),
      pinRequireMaster: pinFails(api).requireMaster,
      pinOn: pinPolicy(),
      pinIntervalHours: PIN_INTERVAL_MS / 3600000,
      requirePinForSending: !!next.requirePinForSending,
      requirePinForReveal: next.requirePinForReveal !== false,
    };
  });

  // ---- session: stay-signed-in + idle-lock + manual sign out ------------
  // "Stay signed in" persists the master password across Theseus restarts
  // using electron.safeStorage — an OS-level protected keystore (Windows
  // DPAPI, macOS Keychain, libsecret on Linux). The encrypted blob only
  // decrypts under the same OS user account, so filesystem-only access
  // (SSH from another user, a lost backup) cannot use it.
  //
  // Storage:
  //   aegis/session/enc     — { encPwB64, savedAt } — safeStorage blob
  //   aegis/session/cfg     — { lockOnClose: bool, idleMinutes: number }
  //
  // Defaults: lockOnClose=true, idleMinutes=15. The user opts in to
  // remember-me by turning "Lock on Navigator close" off in Settings.
  api.onMessage("sessionStatus", (_p, m) => {
    fromPanel(m);
    return sessionStatusFor(api);
  });
  api.onMessage("sessionConfigSet", (p, m) => {
    fromPanel(m);
    const cur = api.storage.get("aegis/session/cfg", null) || { lockOnClose: true, idleMinutes: 15 };
    const next = { ...cur };
    if (p && typeof p.lockOnClose === "boolean") next.lockOnClose = p.lockOnClose;
    if (p && typeof p.idleMinutes === "number") {
      const im = Math.max(0, Math.min(180, Math.floor(p.idleMinutes)));
      next.idleMinutes = im;
    }
    api.storage.set("aegis/session/cfg", next);
    // Turning "Lock on close" on invalidates any stored remember-me blob.
    if (next.lockOnClose) api.storage.set("aegis/session/enc", null);
    return sessionStatusFor(api);
  });
  api.onMessage("sessionEnable", (p, m) => {
    fromPanel(m);
    const pw = String(p && p.masterPassword || "");
    if (!pw) throw new Error("master password required");
    const ss = safeStorageOr(api);
    if (!ss || !ss.isEncryptionAvailable()) throw new Error("OS keystore unavailable — remember-me needs Windows DPAPI / macOS Keychain / libsecret");
    const enc = ss.encryptString(pw).toString("base64");
    api.storage.set("aegis/session/enc", { encPwB64: enc, savedAt: Date.now() });
    // Force lockOnClose = false alongside — semantically they're the same
    // switch as far as the user's UI expects.
    const cur = api.storage.get("aegis/session/cfg", {}) || {};
    api.storage.set("aegis/session/cfg", { ...cur, lockOnClose: false });
    return sessionStatusFor(api);
  });
  api.onMessage("sessionDisable", (_p, m) => {
    fromPanel(m);
    api.storage.set("aegis/session/enc", null);
    const cur = api.storage.get("aegis/session/cfg", {}) || {};
    api.storage.set("aegis/session/cfg", { ...cur, lockOnClose: true });
    return sessionStatusFor(api);
  });

  // Manual sign-out: locks the vault (main-process re-locks it in memory)
  // and drops the runtime cache. Also wipes any remember-me blob so the
  // NEXT Theseus launch will require the master password again — the user
  // just said "sign me out", not "sign me out just for this restart".
  api.onMessage("vaultLock", async (_p, m) => {
    fromPanel(m);
    api.storage.set("aegis/session/enc", null);
    for (const walletId of Array.from(ctx.runtimes.keys())) unmountWallet(walletId);
    try { await api.vault.lifecycle.lock(); } catch (e) { api.log("vault lock:", e?.message || e); }
    emitState();
    return fullState();
  });
}

// Read session status. Kept as a plain helper so both the message handler
// and the startup auto-unlock path can call it without duplicating shape.
function sessionStatusFor(api) {
  const cfg = api.storage.get("aegis/session/cfg", null) || { lockOnClose: true, idleMinutes: 15 };
  const blob = api.storage.get("aegis/session/enc", null);
  const ss = safeStorageOr(api);
  return {
    lockOnClose: !!cfg.lockOnClose,
    idleMinutes: Number(cfg.idleMinutes) || 0,
    hasSession: !!(blob && blob.encPwB64),
    safeStorageAvailable: !!(ss && ss.isEncryptionAvailable && ss.isEncryptionAvailable()),
  };
}

// Best-effort access to electron.safeStorage from inside the addon. The
// addon runs in the main process, so require("electron") gives us the
// full main-process API; on hosts that shadow this (tests, older builds)
// we degrade to "unavailable" instead of throwing.
function safeStorageOr(api) {
  try {
    const e = api.require ? api.require("electron") : require("electron");
    return e && e.safeStorage ? e.safeStorage : null;
  } catch { return null; }
}

// Called from activate() after deps + WC init, BEFORE mountAllWallets.
// If the user opted into stay-signed-in AND we have a stored blob AND
// safeStorage can decrypt it under this OS user → auto-unlock the vault.
// Any failure is silent (log-only) — mountAllWallets will fall back to
// the panel's lock screen exactly as before.
async function tryAutoUnlock(api) {
  try {
    const status = await api.vault.lifecycle.status();
    if (status && status.unlocked) return;
  } catch {}
  const cfg = api.storage.get("aegis/session/cfg", null) || { lockOnClose: true, idleMinutes: 15 };
  if (cfg.lockOnClose) return;
  const blob = api.storage.get("aegis/session/enc", null);
  if (!blob || !blob.encPwB64) return;
  const ss = safeStorageOr(api);
  if (!ss || !ss.isEncryptionAvailable()) return;
  try {
    const pw = ss.decryptString(Buffer.from(blob.encPwB64, "base64"));
    await api.vault.lifecycle.unlock(pw);
    api.log("auto-unlocked via safeStorage session");
  } catch (e) {
    api.log("auto-unlock failed:", e?.message || e);
    // Drop the stale blob so we don't retry every launch.
    api.storage.set("aegis/session/enc", null);
  }
}

// One "describePlan" is enough for both chains because plan() returns a
// common shape: {recipients:[{to,value}], fee, feeRate, total, inputs:[]…}.
function describePlan(plan) {
  const sent = plan.recipients.reduce((a, r) => a + r.value, 0);
  return {
    recipients: plan.recipients, fee: plan.fee, feeRate: plan.feeRate,
    inputs: (plan.inputs || []).length, change: plan.change || null,
    total: plan.total != null ? plan.total : (sent + plan.fee),
  };
}

// ---- dapp bridges (page → activate()) --------------------------------------
// Permission model stays the same as the single-wallet build for BCH:
//   { [origin]: { readAddress:true, sendTx:{capSats,usedSats,grantedAt},
//                 trx: { readAddress:true, network } } }
// The BCH bridge always talks to the LEGACY default BCH wallet (the .x pages
// pre-date multi-wallet and cannot pick between them). The Tron bridge talks
// to the currently-SELECTED Tron wallet; if none is selected, requests fail.
const BCH_ALLOWANCES = [100000, 1000000, 10000000];   // 0.001, 0.01, 0.1 BCH
const pendingByOrigin = new Set();
function permissions(api) { const p = api.storage.get("permissions", {}); return p && typeof p === "object" ? p : {}; }

// ---- grants: session + persisted ------------------------------------------
// A plain "Connect" grants the origin for this browser session (memory only);
// ticking "Always allow" persists it under api.storage "permissions". Both
// look identical to the handlers via grantFor(). Scopes: "bch" (the
// window.bitcoincash bridge keeps its flat readAddress), "eth", "sol", "trx".
// ETH grants also carry the origin's chainId — chain is per origin, never a
// global the sidebar or another site can flip under a connected dapp.
// Before this, a plain "Connect" stored nothing, so the very next call from
// the site failed with "not connected".
const sessionGrants = new Map();   // origin -> { readAddress?, eth?, sol?, trx? }
function grantFor(api, origin, scope) {
  const persisted = permissions(api)[origin] || {};
  const session = sessionGrants.get(origin) || {};
  if (scope === "bch") {
    if (persisted.readAddress) return { readAddress: true, persisted: true };
    if (session.readAddress) return { readAddress: true, persisted: false };
    return null;
  }
  const p = persisted[scope], s = session[scope];
  if (p && p.readAddress) return { ...p, persisted: true };
  if (s && s.readAddress) return { ...s, persisted: false };
  return null;
}
function setGrant(api, origin, scope, value, persist) {
  const wrap = scope === "bch" ? value : { [scope]: value };
  if (persist) {
    const perms = permissions(api);
    perms[origin] = { ...(perms[origin] || {}), ...wrap };
    api.storage.set("permissions", perms);
    syncInjectPolicy(api);
  } else {
    sessionGrants.set(origin, { ...(sessionGrants.get(origin) || {}), ...wrap });
  }
  emitState();
}
// Patch fields (e.g. chainId) on whichever grant the origin currently holds.
function patchGrant(api, origin, scope, patch) {
  const g = grantFor(api, origin, scope);
  if (!g) return false;
  const { persisted, ...rest } = g;
  setGrant(api, origin, scope, { ...rest, ...patch }, persisted);
  return true;
}
// An unconnected site that asked for a chain (addChain / switch before
// connect) gets it remembered for its eventual eth_requestAccounts — no
// address is disclosed by this.
function rememberPendingChain(origin, chainId) {
  const cur = sessionGrants.get(origin) || {};
  sessionGrants.set(origin, { ...cur, eth: { ...(cur.eth || {}), chainId } });
}
function revokeOrigin(api, origin) {
  const perms = permissions(api);
  delete perms[origin];
  api.storage.set("permissions", perms);
  sessionGrants.delete(origin);
  syncInjectPolicy(api);
}

// ---- who can see the wallet ------------------------------------------------
// The bridges used to go into every https page, which tells every page that
// this browser carries a wallet (and which one) before the user has done
// anything. In "allowed" mode Theseus injects only into origins listed in
// the reserved storage key "__pageInjectPolicy" — it reads that key itself,
// at document start, even while Aegis has not been started yet. The list is
// the sites the user enabled plus every site with a saved connection, so
// turning the mode on never breaks a dapp already in use.
const INJECT_MODE_KEY = "aegis/inject/mode";
const INJECT_ALLOW_KEY = "aegis/inject/allow";
function injectAllowList(api) {
  const v = api.storage.get(INJECT_ALLOW_KEY, []);
  return Array.isArray(v) ? v.filter((o) => typeof o === "string") : [];
}
function injectMode(api) { return api.storage.get(INJECT_MODE_KEY, "all") === "allowed" ? "allowed" : "all"; }
function syncInjectPolicy(api) {
  const origins = Array.from(new Set([...injectAllowList(api), ...Object.keys(permissions(api))]));
  api.storage.set("__pageInjectPolicy", { mode: injectMode(api), origins });
}
function normalizeOrigin(raw) {
  try {
    const u = new URL(String(raw || "").replace(/^bns:\/\//i, "https://"));
    if (u.protocol !== "https:" && u.protocol !== "http:") return null;
    return `${u.protocol}//${u.host}`;
  } catch { return null; }
}
// Panel view: persisted grants plus session-only ones. An origin with no
// persisted entry is flagged `session`; one with both gets the session
// scopes merged in under the persisted ones.
function grantsForPanel(api) {
  const out = JSON.parse(JSON.stringify(permissions(api)));
  for (const [origin, g] of sessionGrants) {
    const hasGrant = g.readAddress || g.eth?.readAddress || g.sol?.readAddress || g.trx?.readAddress;
    if (!hasGrant) continue;
    out[origin] = out[origin] ? { ...g, ...out[origin] } : { ...g, session: true };
  }
  return out;
}

// Tron: only transactions Aegis itself signed may be broadcast through the
// bridge — a dapp can't use the wallet as a relay for foreign signatures.
const signedTronTxids = new Set();
function rememberSignedTron(txid) {
  signedTronTxids.add(txid);
  if (signedTronTxids.size > 200) signedTronTxids.delete(signedTronTxids.values().next().value);
}

// Dapp message bytes: personal_sign carries hex-encoded bytes (ethers, viem,
// wagmi); a plain string is UTF-8 (older dapps, our own panel).
function bytesFromDappMessage(raw) {
  const s = raw == null ? "" : String(raw);
  if (/^0x([0-9a-f]{2})*$/i.test(s)) return new Uint8Array(Buffer.from(s.slice(2), "hex"));
  return new TextEncoder().encode(s);
}
// Overlay preview: the text if it is clean UTF-8, else a length + hex prefix.
function previewBytes(bytes, max = 400) {
  let text = null;
  try { text = new TextDecoder("utf-8", { fatal: true }).decode(bytes); } catch {}
  if (text != null && !/[\u0000-\u0008\u000b\u000c\u000e-\u001f\u007f]/.test(text)) {
    return previewText(text, Math.max(max, 1500));
  }
  return `<${bytes.length} bytes: 0x${Buffer.from(bytes.subarray(0, 30)).toString("hex")}${bytes.length > 30 ? "…" : ""}>`;
}

// ---- Solana message parsing ------------------------------------------------
const SOL_TOKEN_PROGRAMS = new Set([
  "TokenkegQfeZyiNwAJbNbGKPFXCWuBvf9Ss623VQ5DA",   // SPL Token
  "TokenzQdBNbLqP5VEhdkAS6EPFLC1PHnBqCXEpPxuEb",   // Token-2022
]);
// Full wire: compact-u16(sigCount) || sig[64]*sigCount || message.
function splitSolWire(wire) {
  let off = 0;
  const compact = () => {
    let n = 0, shift = 0;
    for (;;) {
      if (off >= wire.length) throw new Error("truncated tx wire");
      const b = wire[off++];
      n |= (b & 0x7f) << shift;
      if ((b & 0x80) === 0) break;
      shift += 7;
      if (shift > 14) throw new Error("compact-u16 too long");
    }
    return n;
  };
  const sigCount = compact();
  if (sigCount < 1 || sigCount > 32) throw new Error("bad signature count " + sigCount);
  const sigsStart = off;
  const messageStart = sigsStart + sigCount * 64;
  if (wire.length < messageStart) throw new Error("truncated tx wire");
  return { sigCount, sigsStart, messageBytes: wire.slice(messageStart) };
}
// Structural parse of a legacy or v0 message. `ok:false` means the bytes
// cannot be a message — used both to sign transactions and to REFUSE
// transaction-shaped payloads handed to signMessage.
function parseSolMessage(msg, ourPub) {
  try {
    let off = 0, version = null;
    if (!(msg instanceof Uint8Array) || msg.length < 3 + 1 + 32 + 32) throw new Error("too short");
    if (msg[0] & 0x80) {
      version = msg[0] & 0x7f; off = 1;
      if (version !== 0) throw new Error("unsupported message version " + version);
    }
    const numRequiredSigs = msg[off], numReadonlySigned = msg[off + 1], numReadonlyUnsigned = msg[off + 2];
    off += 3;
    const compact = () => {
      let n = 0, shift = 0;
      for (;;) {
        if (off >= msg.length) throw new Error("truncated");
        const b = msg[off++];
        n |= (b & 0x7f) << shift;
        if ((b & 0x80) === 0) break;
        shift += 7;
        if (shift > 14) throw new Error("bad compact-u16");
      }
      return n;
    };
    const keyCount = compact();
    if (keyCount < 1 || keyCount > 256) throw new Error("bad account key count");
    if (numRequiredSigs < 1 || numRequiredSigs > keyCount) throw new Error("bad header");
    if (numReadonlySigned > numRequiredSigs || numReadonlyUnsigned > keyCount - numRequiredSigs) throw new Error("bad header");
    if (msg.length < off + keyCount * 32 + 32) throw new Error("truncated keys");
    const keys = [];
    for (let i = 0; i < keyCount; i++) { keys.push(msg.subarray(off, off + 32)); off += 32; }
    const blockhash = msg.subarray(off, off + 32); off += 32;
    const ixCount = compact();
    const instructions = [];
    for (let i = 0; i < ixCount; i++) {
      if (off >= msg.length) throw new Error("truncated instruction");
      const programIdx = msg[off++];
      const na = compact(); const accounts = [];
      for (let k = 0; k < na; k++) { if (off >= msg.length) throw new Error("truncated accounts"); accounts.push(msg[off++]); }
      const nd = compact();
      if (off + nd > msg.length) throw new Error("truncated instruction data");
      const data = msg.subarray(off, off + nd); off += nd;
      instructions.push({ programIdx, accounts, data });
    }
    let lookupTables = 0;
    if (version === 0) lookupTables = compact();   // static keys suffice for the signer checks
    let ourIndex = -1;
    if (ourPub) {
      for (let i = 0; i < keyCount; i++) {
        let eq = true;
        for (let j = 0; j < 32; j++) if (keys[i][j] !== ourPub[j]) { eq = false; break; }
        if (eq) { ourIndex = i; break; }
      }
    }
    return { ok: true, version, numRequiredSigs, keys, blockhash, instructions, lookupTables, ourIndex, length: msg.length };
  } catch (e) {
    return { ok: false, error: e?.message || String(e) };
  }
}
// Overlay rows: System transfers and SPL transfer/approve/set-authority are
// decoded; everything else is named by program so the user at least sees
// how much of the transaction Aegis could not read.
function solInstructionRows(parsed) {
  const b58 = (b) => ctx.d.base58check.encodeBase58(b);
  const u64le = (d, o) => { let v = 0n; for (let i = 7; i >= 0; i--) v = (v << 8n) | BigInt(d[o + i] || 0); return v; };
  const rows = [];
  const lines = parsed.instructions.map((ix, i) => {
    if (ix.programIdx >= parsed.keys.length) return `${i + 1}. program from a lookup table (not decoded)`;
    const progB58 = b58(parsed.keys[ix.programIdx]);
    const acct = (n) => {
      const idx = ix.accounts[n];
      return idx == null ? "?" : (idx < parsed.keys.length ? b58(parsed.keys[idx]) : `lookup-table account #${idx}`);
    };
    const d = ix.data;
    if (progB58 === "11111111111111111111111111111111" && d.length >= 12 && d[0] === 2 && d[1] === 0 && d[2] === 0 && d[3] === 0) {
      return `${i + 1}. System transfer ${fmtValue(u64le(d, 4).toString(), 9)} SOL → ${acct(1)}`;
    }
    if (SOL_TOKEN_PROGRAMS.has(progB58) && d.length >= 9) {
      if (d[0] === 3) return `${i + 1}. Token transfer ${u64le(d, 1).toString()} units → ${acct(1)}`;
      if (d[0] === 12) return `${i + 1}. Token transfer ${u64le(d, 1).toString()} units → ${acct(2)}`;
      if (d[0] === 4) return `${i + 1}. Token APPROVE: delegate ${acct(1)} may spend ${u64le(d, 1).toString()} units`;
    }
    if (SOL_TOKEN_PROGRAMS.has(progB58) && d.length >= 1 && d[0] === 6) return `${i + 1}. Token SET AUTHORITY on ${acct(0)} — hands the account to someone else`;
    return `${i + 1}. program ${progB58.slice(0, 8)}…: ${d.length} bytes, ${ix.accounts.length} account${ix.accounts.length === 1 ? "" : "s"} (not decoded)`;
  });
  rows.push({ label: parsed.instructions.length === 1 ? "Instruction" : "Instructions", value: lines.join("\n") || "(none)", mono: true });
  if (parsed.version === 0) {
    rows.push({ label: "Format", value: `v0 · ${parsed.lookupTables} address-lookup table${parsed.lookupTables === 1 ? "" : "s"} (accounts inside them are not shown)` });
  }
  const others = parsed.numRequiredSigs - 1;
  rows.push({ label: "Signers", value: others ? `${parsed.numRequiredSigs} — you (slot #${parsed.ourIndex}) + ${others} other${others === 1 ? "" : "s"}` : "1 — you" });
  return rows;
}

const ETH_RPC_PRECONNECT = new Set(["eth_chainId", "net_version", "eth_blockNumber"]);
const ETH_RPC_NEVER = /^(eth_sign|eth_signTransaction|eth_sendTransaction|eth_accounts|eth_requestAccounts|eth_coinbase|eth_signTypedData|eth_newFilter|eth_newBlockFilter|eth_newPendingTransactionFilter|eth_uninstallFilter|eth_getFilterChanges|eth_getFilterLogs|eth_subscribe|eth_unsubscribe|eth_mining|eth_submit|eth_getWork)/;

// EIP-2612 Permit, DAI-style permit, and Uniswap Permit2 (PermitSingle /
// PermitBatch / PermitTransferFrom / PermitBatchTransferFrom). Returns the
// overlay rows that say who may spend what until when, or null when the
// typed data is not a spending approval.
function describePermit(td) {
  const primary = String(td?.primaryType || "");
  if (!/^Permit/.test(primary)) return null;
  const msg = (td && typeof td.message === "object" && td.message) || {};
  const UNLIMITED = 1n << 159n;                    // ≥ half of uint160 covers Permit2's max and every uint256 max
  const big = (v) => { try { return BigInt(v); } catch { return null; } };
  const amountText = (v) => { const b = big(v); return b === null ? String(v) : (b >= UNLIMITED ? "UNLIMITED (∞)" : b.toString() + " units"); };
  const when = (v) => {
    const b = big(v);
    if (b === null) return String(v);
    if (b >= 4102444800n) return "never expires";    // 2100-01-01 and beyond
    try { return new Date(Number(b) * 1000).toISOString().replace("T", " ").slice(0, 16) + " UTC"; } catch { return b.toString(); }
  };
  const rows = [];
  let risky = false;
  const spender = msg.spender;
  rows.push({ label: "Spender", value: spender ? String(spender) : "(none named — anyone holding this signature)", mono: true, strong: true });
  if (!spender) risky = true;
  const items = [];
  if (primary === "Permit") {
    // EIP-2612 has `value`; DAI has `allowed: true` (always unlimited).
    if ("allowed" in msg) items.push({ token: td.domain?.verifyingContract, amount: msg.allowed ? UNLIMITED : 0n });
    else items.push({ token: td.domain?.verifyingContract, amount: msg.value });
    if (msg.deadline != null || msg.expiry != null) rows.push({ label: "Valid until", value: when(msg.deadline ?? msg.expiry) });
  } else {
    const list = Array.isArray(msg.details) ? msg.details : (msg.details ? [msg.details] : (Array.isArray(msg.permitted) ? msg.permitted : (msg.permitted ? [msg.permitted] : [])));
    for (const d of list) items.push({ token: d?.token, amount: d?.amount, expiration: d?.expiration });
    if (msg.sigDeadline != null || msg.deadline != null) rows.push({ label: "Signature valid until", value: when(msg.sigDeadline ?? msg.deadline) });
  }
  items.slice(0, 10).forEach((it, i) => {
    const b = big(it.amount);
    if (b !== null && b >= UNLIMITED) risky = true;
    rows.push({
      label: items.length > 1 ? `Token #${i + 1}` : "Token",
      value: `${it.token || "?"} — ${amountText(it.amount)}${it.expiration != null ? ` · allowance ${when(it.expiration)}` : ""}`,
      mono: true,
    });
  });
  if (items.length > 10) { rows.push({ label: "Tokens", value: `… and ${items.length - 10} more` }); risky = true; }
  if (!items.length) { rows.push({ label: "Token", value: "(could not read the approval — treat as unlimited)" }); risky = true; }
  return { rows, risky };
}

async function withOriginLock(origin, fn) {
  if (pendingByOrigin.has(origin)) throw new Error("a wallet request from this site is already waiting for approval");
  pendingByOrigin.add(origin);
  try { return await fn(); } finally { pendingByOrigin.delete(origin); }
}

// Only .x sites (BCNR-native TLD) get the BCH bridge, matching the pre-
// multi-wallet gate. Widening the manifest to https://*/* makes the Tron
// bridge available everywhere.
// Any ordinary web origin may talk to the BCH bridge. The old test here
// required a ".x" hostname, which locked out every third-party BCH dapp
// (Cauldron, bch.guru) and our own dapps on other TLDs — while the TRX / ETH
// / SOL bridges and WizardConnect accepted any origin all along. The real
// protection is downstream and unchanged: an approval overlay on every
// action plus per-origin permissions. This only keeps non-web schemes out.
function isDappOrigin(origin) {
  try { const u = new URL(origin); return u.protocol === "https:" || u.protocol === "http:"; }
  catch { return false; }
}
function legacyBchRuntime() {
  const rt = ctx.runtimes.get(LEGACY_BCH_WALLET_ID);
  if (!rt || rt.phase !== "ready" || !rt.adapter) throw new Error("wallet is not ready (vault locked?)");
  return rt;
}
// The Tron bridge routes to the currently-selected wallet if it is Tron;
// otherwise it looks for the first ready Tron wallet on the selected network
// hint; else rejects with "no tron wallet".
function activeTronRuntime() {
  const selId = selectedWalletId();
  const selRt = selId && ctx.runtimes.get(selId);
  if (selRt && selRt.entry.chain === "trx" && selRt.phase === "ready") return selRt;
  for (const rt of ctx.runtimes.values()) if (rt.entry.chain === "trx" && rt.phase === "ready") return rt;
  throw new Error("no Tron wallet available — add one in the Aegis sidebar");
}

function registerPageMessages(api) {
  // ---- BCH bridge (unchanged behavior; wallet source is legacy default) ----
  api.onMessage("getAddress", async (_p, m) => {
    const origin = fromPage(m);
    if (!isDappOrigin(origin)) throw new Error("this page cannot use the wallet bridge");
    const rt = legacyBchRuntime();
    if (grantFor(api, origin, "bch")) return rt.adapter.current().address;
    return withOriginLock(origin, async () => {
      const pick = await api.approvalModal({
        title: "Share your Bitcoin Cash address?",
        origin,
        body: "The site will see your current receiving address and can look up its balance and history on the public chain.",
        rows: [{ label: "Address", value: rt.adapter.current().address, mono: true }],
        actions: [{ id: "allow", label: "Share", primary: true }],
        checkbox: { id: "always", label: "Always allow this site to see my address" },
      });
      if (!pick.startsWith("allow")) throw new Error("user rejected");
      setGrant(api, origin, "bch", { readAddress: true }, pick === "allow+always");
      return rt.adapter.current().address;
    });
  });
  api.onMessage("signAndSend", async (p, m) => {
    const origin = fromPage(m);
    if (!isDappOrigin(origin)) throw new Error("this page cannot use the wallet bridge");
    const rt = legacyBchRuntime();
    return withOriginLock(origin, async () => {
      let plan;
      try { plan = rt.adapter.plan(p || {}); }
      catch (e) { throw new Error(/insufficient funds|too small/i.test(e?.message) ? "insufficient funds" : e?.message || String(e)); }
      const d = describePlan(plan);
      if (d.recipients.length > 8) throw new Error("too many outputs");
      const perms = permissions(api);
      const budget = perms[origin] && perms[origin].sendTx;
      const remaining = budget ? Math.max(0, (budget.capSats | 0) - (budget.usedSats | 0)) : 0;
      if (budget && d.total <= remaining) {
        // An allowance skips the overlay, not the PIN the user asked for on
        // every transaction.
        await requireDappTxPin(origin, "Bitcoin Cash payment");
        const r = await rt.adapter.signAndBroadcast(plan);
        budget.usedSats = (budget.usedSats | 0) + d.total;
        api.storage.set("permissions", perms);
        emitState();
        api.log(`silent send ${d.total} sat for ${origin}, ${remaining - d.total} sat of allowance left`);
        return { txid: r.txid };
      }
      const rows = d.recipients.map((r, i) => ({ label: d.recipients.length > 1 ? `To #${i + 1}` : "To", value: r.to, mono: true }));
      rows.push({ label: "Amount", value: fmtBch(d.recipients.reduce((a, r) => a + r.value, 0)) + " BCH", strong: true });
      rows.push({ label: "Fee", value: `${plan.fee} sat (${plan.feeRate} sat/B)` });
      rows.push({ label: "Total", value: fmtBch(d.total) + " BCH" });
      const pick = await api.approvalModal({
        title: "Send Bitcoin Cash?",
        origin,
        body: budget
          ? `This payment is over what is left of the site's allowance (${fmtBch(remaining)} BCH). Check the address and amount.`
          : "This site is asking your wallet to pay. Check the address and amount.",
        rows,
        actions: [{ id: "send", label: "Send", primary: true }],
        select: {
          id: "cap", label: "Afterwards",
          options: [{ value: "", label: "ask every time" }, ...BCH_ALLOWANCES.map((s) => ({ value: String(s), label: `allow up to ${fmtBch(s)} BCH more without asking` }))],
        },
      });
      const [action, ...flags] = pick.split("+");
      if (action !== "send") throw new Error("user rejected");
      await requireDappTxPin(origin, "Bitcoin Cash payment");
      const cap = flags.find((f) => f.startsWith("cap="));
      const capSats = cap ? Number(cap.slice(4)) : 0;
      if (BCH_ALLOWANCES.includes(capSats)) {
        perms[origin] = { ...(perms[origin] || {}), sendTx: { capSats, usedSats: 0, grantedAt: Date.now() } };
        api.storage.set("permissions", perms);
      } else if (budget) {
        delete perms[origin].sendTx;
        api.storage.set("permissions", perms);
      }
      emitState();
      const r = await rt.adapter.signAndBroadcast(plan);
      return { txid: r.txid };
    });
  });
  api.onMessage("signMessage", async (p, m) => {
    const origin = fromPage(m);
    if (!isDappOrigin(origin)) throw new Error("this page cannot use the wallet bridge");
    const rt = legacyBchRuntime();
    const message = String(p && p.message != null ? p.message : "");
    if (message.length > 4096) throw new Error("message too long");
    return withOriginLock(origin, async () => {
      const pick = await api.approvalModal({
        title: "Sign a message?",
        origin,
        body: "Signing proves you control the address below. It moves no coins.",
        rows: [
          { label: "Message", value: previewText(message), mono: true },
          { label: "Address", value: rt.adapter.current().address, mono: true },
        ],
        actions: [{ id: "sign", label: "Sign", primary: true }],
      });
      if (pick !== "sign") throw new Error("user rejected");
      return rt.adapter.signMessage(message);
    });
  });
  // BCH message verification (BIP-137). Panel-only path: given a message,
  // a base64 signature, and an address, return { valid, address,
  // recoveredHash }. No approval modal (nothing spendable happens), no
  // wallet lookup — pure crypto against the given address.
  // Panel → BCMR resolver. Batched: pass an array of category hex strings,
  // get back { <categoryHex>: {name, symbol, iconUri, decimals, source} }
  // for every one that resolved. Missed categories map to null. This
  // triggers a background fetch for anything not in the disk cache, so
  // the second call for the same set returns instantly.
  api.onMessage("tokenMetadata", async (p, m) => {
    fromPanel(m);
    const cats = Array.isArray(p?.categories) ? p.categories.map(String).filter((c) => /^[0-9a-f]{64}$/i.test(c)) : [];
    if (!cats.length) return {};
    const entries = await ctx.bcmr.lookupMany(cats);
    const out = {};
    // Pass the category so a local name can win over the registry — and so
    // a category with ONLY a local name still comes back named instead of
    // null, which is the whole point for self-minted tokens.
    for (const cat of cats) out[cat] = ctx.bcmr.metadataOf(entries[cat], cat);
    // Tell the panel whether the registries themselves are reachable. A dead
    // registry used to be indistinguishable from an unregistered token, and
    // both defaults were 404 for who knows how long because of it.
    const reachable = Object.values(entries).some((e) => e && e.snapshot);
    return { meta: out, registriesAnswered: reachable, registries: ctx.bcmr.registryList().length };
  });

  // Name a token yourself. The only way to label a category that publishes
  // no metadata anywhere — no registry entry, and commonly not even an
  // OP_RETURN in its genesis transaction.
  api.onMessage("setTokenLabel", (p, m) => {
    fromPanel(m);
    const cat = String(p?.category || "");
    if (!/^[0-9a-f]{64}$/i.test(cat)) throw new Error("not a token category");
    const rec = ctx.bcmr.setLocalName(cat, {
      name: p?.name, symbol: p?.symbol, decimals: p?.decimals,
    });
    return { category: cat, local: rec };
  });
  // Read the configured BCMR registry list (defaults + any user additions).
  api.onMessage("bcmrRegistries", (_p, m) => {
    fromPanel(m);
    return { registries: ctx.bcmr.registryList() };
  });
  // Overwrite the registry list. Empty array restores defaults on next read.
  api.onMessage("setBcmrRegistries", (p, m) => {
    fromPanel(m);
    ctx.bcmr.setRegistries(Array.isArray(p?.registries) ? p.registries : []);
    return { registries: ctx.bcmr.registryList() };
  });

  api.onMessage("verifyMessage", (p, m) => {
    fromPanel(m);
    const message = String(p?.message != null ? p.message : "");
    const signature = String(p?.signature || "");
    const address = String(p?.address || "");
    if (!signature || !address) throw new Error("signature and address are required");
    try {
      return ctx.d.keysLib.verifyMessage(message, signature, address, {
        cashaddr: ctx.d.cashaddr, secp256k1: ctx.d.secp256k1,
      });
    } catch (e) {
      return { valid: false, error: e?.message || String(e) };
    }
  });

  // ---- Tron bridge (tronWeb / tronLink) -----------------------------------
  api.onMessage("trx.requestAccounts", async (_p, m) => {
    const origin = fromPage(m);
    const rt = activeTronRuntime();
    const snap = rt.adapter.snapshot();
    if (grantFor(api, origin, "trx")) return { code: 200, address: snap.address, network: snap.network };
    return withOriginLock(origin, async () => {
      const pick = await api.approvalModal({
        title: "Connect this site to your Tron wallet?",
        origin,
        body: "The site will see this address and can build transactions for you to sign.",
        rows: [
          { label: "Address", value: snap.address, mono: true },
          { label: "Network", value: snap.network === "nile" ? "Nile testnet" : "Tron mainnet" },
          { label: "Wallet", value: `${rt.entry.label} — Tron · ${snap.network === "nile" ? "Nile testnet" : "Mainnet"}` },
        ],
        actions: [{ id: "allow", label: "Connect", primary: true }],
        checkbox: { id: "always", label: "Always allow this site to see this address" },
      });
      if (!pick.startsWith("allow")) throw new Error("user rejected");
      setGrant(api, origin, "trx", { readAddress: true, network: snap.network }, pick === "allow+always");
      return { code: 200, address: snap.address, network: snap.network };
    });
  });
  api.onMessage("trx.getAccount", (_p, m) => {
    const origin = fromPage(m);
    if (!grantFor(api, origin, "trx")) throw new Error("not connected — call tron_requestAccounts first");
    const rt = activeTronRuntime();
    const snap = rt.adapter.snapshot();
    return { address: snap.address, network: snap.network };
  });
  // Sign an arbitrary raw_data_hex the dapp built (with its own tronWeb).
  // Everything the overlay shows is decoded from raw_data_hex — the bytes
  // that get signed. The overlay used to read the dapp's raw_data JSON,
  // which can say "1 TRX to X" over bytes that do something else entirely.
  api.onMessage("trx.signTransaction", async (p, m) => {
    const origin = fromPage(m);
    const rt = activeTronRuntime();
    if (!grantFor(api, origin, "trx")) throw new Error("not connected — call tron_requestAccounts first");
    const tx = p && p.transaction;
    if (!tx || typeof tx !== "object" || !tx.raw_data_hex) throw new Error("bad transaction");
    // The dapp's raw_data JSON and txID are cross-checked, never trusted.
    let decoded;
    try { decoded = ctx.d.tronDecode.decodeRawData(tx.raw_data_hex); }
    catch (e) { throw new Error("cannot decode raw_data_hex: " + (e?.message || e)); }
    if (tx.txID && String(tx.txID).toLowerCase() !== decoded.txid) throw new Error("txID does not match raw_data_hex");
    const me = rt.adapter.address;
    for (const c of decoded.contracts) {
      if (!c.owner) throw new Error(`cannot read the owner of ${c.typeName}; refusing to sign`);
      if (c.owner !== me) throw new Error(`transaction owner ${c.owner} is not this wallet`);
    }
    return withOriginLock(origin, async () => {
      const rows = [];
      decoded.contracts.forEach((c, i) => {
        const n = decoded.contracts.length > 1 ? ` #${i + 1}` : "";
        rows.push({ label: "Type" + n, value: c.typeName + (c.dangerous ? " — grants control to another account" : "") });
        if (c.type === 1) {
          rows.push({ label: "To", value: c.to || "(none)", mono: true });
          rows.push({ label: "Amount", value: `${fmtTrx(Number(c.amount))} TRX`, strong: true });
        } else if (c.type === 2) {
          rows.push({ label: "To", value: c.to || "(none)", mono: true });
          rows.push({ label: "Amount", value: `${String(c.amount)} units of asset ${c.assetName || "?"}`, strong: true });
        } else if (c.type === 31) {
          rows.push({ label: "Contract", value: c.contract || "(none)", mono: true });
          const call = c.call;
          if (call && call.name === "transfer") rows.push({ label: "Call", value: `transfer ${call.unlimited ? "UNLIMITED" : String(call.amount)} token units to ${call.to}`, strong: true });
          else if (call && (call.name === "approve" || call.name === "increaseAllowance")) rows.push({ label: "Call", value: `${call.name}: let ${call.spender} spend ${call.unlimited ? "UNLIMITED (∞)" : String(call.amount)} token units`, strong: true });
          else if (call && call.name === "transferFrom") rows.push({ label: "Call", value: `transferFrom ${call.from} → ${call.to}: ${call.unlimited ? "UNLIMITED" : String(call.amount)} units`, strong: true });
          else rows.push({ label: "Call", value: call && call.selector ? `unknown method 0x${call.selector} (${c.data.length / 2} bytes, not decoded)` : "(no call data)", mono: true });
          if (c.callValue) rows.push({ label: "TRX attached", value: `${fmtTrx(Number(c.callValue))} TRX` });
        }
      });
      if (decoded.feeLimit != null) rows.push({ label: "Fee limit", value: `${fmtTrx(Number(decoded.feeLimit))} TRX` });
      if (decoded.memo) rows.push({ label: "Memo", value: decoded.memo.slice(0, 200), mono: true });
      rows.push({ label: "Tx ID", value: decoded.txid, mono: true });
      rows.push({ label: "Wallet", value: `${rt.entry.label} — Tron · ${rt.adapter.snapshot().network === "nile" ? "Nile testnet" : "Mainnet"}` });
      const risky = decoded.contracts.some((c) => c.dangerous || (c.call && c.call.unlimited));
      const pick = await api.approvalModal({
        title: "Sign a Tron transaction?",
        origin,
        body: risky
          ? "WARNING: this transaction hands another account unlimited or permanent control over funds. Only sign if you fully trust this site."
          : "Decoded from the bytes that will be signed. Check the type, amount and destination.",
        rows,
        actions: [{ id: "sign", label: risky ? "Sign anyway" : "Sign", primary: !risky, danger: risky }],
      });
      if (pick !== "sign") throw new Error("user rejected");
      await requireDappTxPin(origin, "Tron transaction");
      const sig = rt.adapter.signRawData(tx.raw_data_hex);
      rememberSignedTron(decoded.txid);
      return { ...tx, txID: decoded.txid, signature: [sig] };
    });
  });
  api.onMessage("trx.sendRawTransaction", async (p, m) => {
    const origin = fromPage(m);
    const rt = activeTronRuntime();
    if (!grantFor(api, origin, "trx")) throw new Error("not connected — call tron_requestAccounts first");
    const signedTx = p && p.transaction;
    if (!signedTx || !signedTx.raw_data_hex || !Array.isArray(signedTx.signature)) throw new Error("bad signed tx");
    // No approval here — the sign step carried it. But only what Aegis
    // signed goes out: the bridge is not a relay for foreign signatures.
    let txid;
    try { txid = ctx.d.tronDecode.decodeRawData(signedTx.raw_data_hex).txid; }
    catch (e) { throw new Error("cannot decode raw_data_hex: " + (e?.message || e)); }
    if (!signedTronTxids.has(txid)) throw new Error("refusing to broadcast a transaction this wallet did not sign");
    return rt.adapter.broadcastSignedTx({ ...signedTx, txID: txid });
  });
  api.onMessage("trx.signMessageV2", async (p, m) => {
    const origin = fromPage(m);
    const rt = activeTronRuntime();
    if (!grantFor(api, origin, "trx")) throw new Error("not connected — call tron_requestAccounts first");
    const message = String(p && p.message != null ? p.message : "");
    if (message.length > 4096) throw new Error("message too long");
    return withOriginLock(origin, async () => {
      const snap = rt.adapter.snapshot();
      const pick = await api.approvalModal({
        title: "Sign a Tron message?",
        origin,
        body: "Signing proves you control this address. It moves no coins.",
        rows: [
          { label: "Message", value: previewText(message), mono: true },
          { label: "Address", value: snap.address, mono: true },
        ],
        actions: [{ id: "sign", label: "Sign", primary: true }],
      });
      if (pick !== "sign") throw new Error("user rejected");
      return rt.adapter.signMessageV2(message);
    });
  });

  // ---- Ethereum (EIP-1193) ---------------------------------------------
  function ethRuntimeForChain(chainId) {
    for (const rt of ctx.runtimes.values()) {
      if (rt.entry.chain !== "eth" || rt.phase !== "ready") continue;
      if (Number(rt.adapter.snapshot().chainId) === Number(chainId)) return rt;
    }
    return null;
  }
  // The wallet a given origin talks to. Chain is per origin — fixed at
  // connect, changed only by that origin's own wallet_switchEthereumChain /
  // wallet_addEthereumChain. The sidebar selection is a UI preference and
  // never redirects a connected dapp. Unconnected origins get the chain
  // they asked for before connecting, else the selected ETH wallet.
  function activeEthRuntime(origin) {
    const g = origin ? grantFor(api, origin, "eth") : null;
    const wanted = g?.chainId ?? (origin ? sessionGrants.get(origin)?.eth?.chainId : null);
    if (wanted != null) { const rt = ethRuntimeForChain(wanted); if (rt) return rt; }
    const selId = selectedWalletId();
    const selRt = selId && ctx.runtimes.get(selId);
    if (selRt && selRt.entry.chain === "eth" && selRt.phase === "ready") return selRt;
    for (const rt of ctx.runtimes.values()) if (rt.entry.chain === "eth" && rt.phase === "ready") return rt;
    throw new Error("no Ethereum wallet available — add one in the Aegis sidebar");
  }
  function ethConnectedFor(origin) { return !!grantFor(api, origin, "eth"); }
  function ethError(message, code) { const e = new Error(message); e.code = code; return e; }
  api.onMessage("eth.requestAccounts", async (_p, m) => {
    const origin = fromPage(m);
    const rt = activeEthRuntime(origin);
    const snap = rt.adapter.snapshot();
    const chainIdHex = "0x" + Number(snap.chainId).toString(16);
    const networkVersion = String(snap.chainId);
    if (ethConnectedFor(origin)) return { address: snap.address, chainIdHex, networkVersion };
    return withOriginLock(origin, async () => {
      const pick = await api.approvalModal({
        title: "Connect this site to your Ethereum wallet?",
        origin,
        body: "The site will see this address and can build transactions for you to sign.",
        rows: [
          { label: "Address", value: snap.address, mono: true },
          { label: "Network", value: chainMeta("eth", rt.entry.network)?.label || snap.network },
          { label: "Wallet", value: `${rt.entry.label} — Ethereum · ${snap.network}` },
        ],
        actions: [{ id: "allow", label: "Connect", primary: true }],
        checkbox: { id: "always", label: "Always allow this site to see this address" },
      });
      if (!pick.startsWith("allow")) throw new Error("user rejected");
      setGrant(api, origin, "eth", { readAddress: true, chainId: snap.chainId }, pick === "allow+always");
      return { address: snap.address, chainIdHex, networkVersion };
    });
  });
  api.onMessage("eth.personalSign", async (p, m) => {
    const origin = fromPage(m);
    if (!ethConnectedFor(origin)) throw new Error("not connected — call eth_requestAccounts first");
    const rt = activeEthRuntime(origin);
    // ethers / viem / wagmi send hex-encoded bytes; signing that hex as
    // literal text produced signatures no dapp could verify. The overlay
    // shows the decoded text.
    const bytes = bytesFromDappMessage(p && p.message);
    if (bytes.length > 16384) throw new Error("message too long");
    return withOriginLock(origin, async () => {
      const pick = await api.approvalModal({
        title: "Sign an Ethereum message?",
        origin,
        body: "Signing proves you control this address. It moves no ETH.",
        rows: [
          { label: "Message", value: previewBytes(bytes), mono: true },
          { label: "Address", value: rt.adapter.snapshot().address, mono: true },
        ],
        actions: [{ id: "sign", label: "Sign", primary: true }],
      });
      if (pick !== "sign") throw new Error("user rejected");
      return rt.adapter.signMessage(bytes);
    });
  });
  api.onMessage("eth.sendTransaction", async (p, m) => {
    const origin = fromPage(m);
    if (!ethConnectedFor(origin)) throw new Error("not connected — call eth_requestAccounts first");
    const rt = activeEthRuntime(origin);
    const tx = (p && p.tx) || {};
    if (!tx.to) throw new Error("tx.to required");
    if (tx.from && String(tx.from).toLowerCase() !== rt.adapter.address.toLowerCase()) throw new Error("tx.from is not the connected account");
    // MetaMask semantics: every field the dapp set is honoured verbatim —
    // value, data, gas, fee caps, nonce. plan() fills in what is missing.
    // The calldata used to be dropped, so a token transfer went out as a
    // plain 0-value send to the token contract.
    const ethLib = ctx.d.ethAdapter;
    const data = ethLib.normalizeData(tx.data ?? tx.input);
    const valueWei = tx.value ? ethLib.toBig(tx.value).toString() : "0";
    return withOriginLock(origin, async () => {
      const snap = rt.adapter.snapshot();
      const plan = await rt.adapter.plan({
        to: tx.to, amount: valueWei, sendMax: false, data,
        gasLimit: tx.gas ?? tx.gasLimit, maxFeePerGas: tx.maxFeePerGas,
        maxPriorityFeePerGas: tx.maxPriorityFeePerGas, gasPrice: tx.gasPrice, nonce: tx.nonce,
      });
      const meta = chainMeta("eth", rt.entry.network);
      const ticker = snap.ticker || meta.ticker;
      const isCall = data !== "0x";
      const rows = [{ label: "To", value: ethLib.eip55(plan.recipients[0].to), mono: true }];
      let body = `This site is asking your wallet to send ${ticker}.`;
      let risky = false;
      if (isCall) {
        let code = "0x";
        try { code = await rt.adapter._client.call("eth_getCode", [plan.recipients[0].to, "latest"]); } catch {}
        rows.push({ label: "Destination", value: code && code !== "0x" ? "smart contract" : "NOT a contract — calldata sent to a plain address does nothing" });
        const call = ethLib.decodeCalldata(data);
        if (call && call.name === "transfer") {
          rows.push({ label: "Call", value: `transfer ${call.unlimited ? "UNLIMITED" : call.amount.toString()} token units to ${call.to}`, strong: true });
        } else if (call && (call.name === "approve" || call.name === "increaseAllowance")) {
          risky = !!call.unlimited;
          rows.push({ label: "Call", value: `${call.name}: let ${call.spender} spend ${call.unlimited ? "UNLIMITED (∞)" : call.amount.toString()} token units`, strong: true });
        } else if (call && call.name === "transferFrom") {
          rows.push({ label: "Call", value: `transferFrom ${call.from} → ${call.to}: ${call.amount.toString()} units`, strong: true });
        } else if (call && call.name === "setApprovalForAll") {
          risky = !!call.approved;
          rows.push({ label: "Call", value: `setApprovalForAll: ${call.approved ? "GRANT" : "revoke"} ${call.operator} control over every NFT in this collection`, strong: true });
        } else if (call && call.name === "permit") {
          risky = !!call.unlimited;
          rows.push({ label: "Call", value: `permit: ${call.spender} may spend ${call.unlimited ? "UNLIMITED (∞)" : call.value.toString()} units`, strong: true });
        } else {
          rows.push({ label: "Call", value: call ? `unknown method 0x${call.selector} (${call.bytes} bytes, not decoded)` : `${(data.length - 2) / 2} bytes of calldata`, mono: true });
        }
        body = risky
          ? "WARNING: this call grants another address open-ended control over your tokens. Only sign if you fully trust this site."
          : "This transaction calls a contract. Aegis decoded what it could — check the destination, the call and the value.";
      }
      rows.push({ label: "Amount", value: `${fmtValue(plan.recipients[0].value, meta.decimals)} ${ticker}`, strong: true });
      rows.push({ label: "Fee (est.)", value: `${fmtValue(plan.feeEstimate, meta.decimals)} ${ticker} · max ${fmtValue(plan.fee, meta.decimals)} ${ticker}` });
      rows.push({ label: "Gas", value: `${plan.gasLimit} · nonce ${plan._draft.nonce}` });
      rows.push({ label: "Wallet", value: `${rt.entry.label} — ${meta.label}` });
      const pick = await api.approvalModal({
        title: isCall ? "Send Ethereum contract call?" : "Send Ethereum transaction?",
        origin, body, rows,
        actions: [{ id: "send", label: risky ? "Send anyway" : "Send", primary: !risky, danger: risky }],
      });
      if (pick !== "send") throw new Error("user rejected");
      await requireDappTxPin(origin, "Ethereum transaction");
      const r = await rt.adapter.signAndBroadcast(plan);
      return { txid: r.txid };
    });
  });
  api.onMessage("eth.signTypedData", async (p, m) => {
    const origin = fromPage(m);
    if (!ethConnectedFor(origin)) throw new Error("not connected — call eth_requestAccounts first");
    const rt = activeEthRuntime(origin);
    // Dapps send typedData as either a JSON string (older MetaMask spec) or
    // an object (v4). Accept both; the encoder wants an object.
    let td = p && p.typedData;
    if (typeof td === "string") { try { td = JSON.parse(td); } catch (e) { throw new Error("typedData: JSON parse failed: " + e.message); } }
    if (!td || typeof td !== "object") throw new Error("typedData required");
    // Compute the digest first — if the encoder rejects the input the user
    // never sees an approval overlay for a broken payload.
    let digest;
    try { digest = ctx.d.eip712.digest(td); }
    catch (e) { throw new Error("EIP-712 encode failed: " + e.message); }
    // Approval overlay: show domain (name + chain), primary type, and a
    // truncated JSON preview of the message so the user has a fighting
    // chance to spot phishing.
    const dom = td.domain || {};
    const snapTd = rt.adapter.snapshot();
    // A signature for another chain is the standard way to get an approval
    // the user believes is for a testnet or a sidechain. MetaMask refuses a
    // domain whose chainId is not the active chain; so does Aegis.
    if (dom.chainId != null && dom.chainId !== "") {
      let domChain = null;
      try { domChain = BigInt(dom.chainId); } catch {}
      if (domChain === null || domChain !== BigInt(snapTd.chainId)) {
        throw ethError(`typed data is for chain ${dom.chainId} but this site is connected on chain ${snapTd.chainId}`, 4901);
      }
    }
    const domainSummary = [dom.name, dom.version && `v${dom.version}`, dom.chainId && `chain ${dom.chainId}`].filter(Boolean).join(" · ") || "(no domain)";
    const messagePreview = JSON.stringify(td.message, (_k, v) => (typeof v === "bigint" ? v.toString() : v), 2) || "";
    const rows = [{ label: "Domain", value: domainSummary }];
    if (dom.verifyingContract) rows.push({ label: "Contract", value: String(dom.verifyingContract), mono: true });
    rows.push({ label: "Primary type", value: String(td.primaryType || "") });
    // Off-chain approvals. A Permit / Permit2 signature moves no gas and
    // shows no transaction, yet lets the spender take the tokens later — it
    // is how most wallet drains happen now. Pull the spender, the amounts
    // and the deadline out of the message and say what they mean.
    const permit = describePermit(td);
    if (permit) for (const r of permit.rows) rows.push(r);
    rows.push({ label: "Message", value: previewText(messagePreview, 3000), mono: true });
    rows.push({ label: "Address", value: snapTd.address, mono: true });
    const risky = !!(permit && permit.risky);
    return withOriginLock(origin, async () => {
      const pick = await api.approvalModal({
        title: permit ? "Sign a token spending permit?" : "Sign typed data (EIP-712)?",
        origin,
        body: permit
          ? (risky
            ? "WARNING: signing this lets the spender below take these tokens at any time, without another prompt and without a transaction from you. Only sign if you fully trust this site."
            : "Signing this lets the spender below move the stated amount of your tokens without a transaction from you.")
          : "The site is asking you to sign a structured message. Verify the domain matches the site you're on — a mismatched domain is the classic phishing tell.",
        rows,
        actions: [{ id: "sign", label: risky ? "Sign anyway" : "Sign", primary: !risky, danger: risky }],
      });
      if (pick !== "sign") throw new Error("user rejected");
      // A permit moves tokens as surely as a transaction does.
      if (permit) await requireDappTxPin(origin, "token spending permit");
      return rt.adapter.signTypedDataDigest(digest);
    });
  });
  api.onMessage("eth.switchChain", async (p, m) => {
    const origin = fromPage(m);
    const wantHex = String(p && p.chainId || "").toLowerCase();
    const wantId = Number(wantHex);
    if (!Number.isFinite(wantId) || wantId <= 0) throw new Error("bad chainId");
    // EIP-3326: the well-known "chain not added" code makes dapps fall back
    // to wallet_addEthereumChain.
    if (!ethRuntimeForChain(wantId)) throw ethError(`Aegis: chainId ${wantHex} is not added. Ask via wallet_addEthereumChain.`, 4902);
    // Per origin only: THIS site moves to the wallet on that chain. It used
    // to flip the global selected wallet, so any site — connected or not —
    // could move every other connected dapp onto another chain. Unconnected
    // sites just have the preference remembered for their connect prompt.
    if (!patchGrant(api, origin, "eth", { chainId: wantId })) rememberPendingChain(origin, wantId);
    return null;
  });
  // EIP-3085: dapp asks Aegis to add a new EVM chain. On approval, we
  // persist the chain config and create a wallet on it under the same
  // vault-derived key. Existing addresses on that chain remain visible on
  // whatever wallet they were funded on — a chain add doesn't move any
  // key material, just registers the network.
  api.onMessage("eth.addChain", async (p, m) => {
    const origin = fromPage(m);
    const spec = (p && p.params) || {};
    const chainIdHex = String(spec.chainId || "").toLowerCase();
    const chainId = Number(chainIdHex);
    if (!chainIdHex.startsWith("0x") || !Number.isFinite(chainId) || chainId <= 0) {
      throw new Error("wallet_addEthereumChain: chainId must be a positive hex integer (e.g. '0x89')");
    }
    const chainName = String(spec.chainName || "").trim() || `EVM #${chainId}`;
    const rpcUrls = Array.isArray(spec.rpcUrls) ? spec.rpcUrls.filter((u) => /^https:\/\//i.test(u)) : [];
    const rpcUrl = rpcUrls[0];
    if (!rpcUrl) throw new Error("wallet_addEthereumChain: at least one https rpcUrls entry is required");
    const explorerBase = Array.isArray(spec.blockExplorerUrls) && spec.blockExplorerUrls[0]
      ? String(spec.blockExplorerUrls[0]).replace(/\/+$/, "")
      : null;
    const nc = spec.nativeCurrency || {};
    const ticker = String(nc.symbol || "ETH").slice(0, 6).toUpperCase();
    // Reject if a wallet on this chain already exists — no-op success per
    // EIP-3085 conventions.
    const existing = walletEntries().find((w) => w.chain === "eth"
      && (w.network === CUSTOM_ETH_PREFIX + chainId
          || (chainMeta("eth", w.network)?.chainId === chainId)));
    if (existing) {
      // Already known: behaves like a switch for THIS origin only. Never a
      // grant — this used to persist a connection without any prompt, so
      // any site could read the address by "adding" a chain Aegis already
      // had. An unconnected site gets the chain remembered for its eventual
      // eth_requestAccounts and learns nothing else.
      if (!patchGrant(api, origin, "eth", { chainId })) rememberPendingChain(origin, chainId);
      return null;
    }
    return withOriginLock(origin, async () => {
      const pick = await api.approvalModal({
        title: "Add an Ethereum chain?",
        origin,
        body: "The site is asking to add a new EVM network to Aegis. Verify the RPC and chain ID — a malicious 'chain add' can point you at a fraudulent RPC that intercepts your reads or signs.",
        rows: [
          { label: "Chain name", value: chainName },
          { label: "Chain ID", value: `${chainId} (${chainIdHex})` },
          { label: "Native ticker", value: ticker },
          { label: "RPC", value: rpcUrl, mono: true },
          { label: "Explorer", value: explorerBase || "(none)", mono: true },
        ],
        actions: [{ id: "add", label: "Add chain", primary: true }],
      });
      if (pick !== "add") throw new Error("user rejected");
      // Persist chain config + create a wallet on it.
      const chains = customEthChains(api);
      chains[String(chainId)] = {
        chainId, chainName, rpcUrl,
        explorerTx: explorerBase ? explorerBase + "/tx/" : "",
        explorerAddr: explorerBase ? explorerBase + "/address/" : "",
        ticker, addedAt: Date.now(), addedByOrigin: origin,
      };
      api.storage.set("customEthChains", chains);
      const network = CUSTOM_ETH_PREFIX + chainId;
      const meta = chainMeta("eth", network);
      const list = walletEntries().slice();
      const index = nextIndex(list, meta);
      const purpose = meta.purposePrefix + index;
      const id = makeWalletId(meta, index);
      const label = `${chainName} — ${meta.short}`;
      const entry = { id, label, chain: "eth", network, purpose, createdAt: Date.now() };
      list.push(entry);
      writeWallets(api, list);
      api.storage.set("selectedWalletId", id);
      ctx.runtimes.set(id, { entry, phase: "locked", error: null, adapter: null });
      emitState();
      await mountWallet(entry);
      // Adding a chain is not connecting. A connected site moves to the new
      // chain; an unconnected one has it remembered for its connect prompt.
      if (!patchGrant(api, origin, "eth", { chainId })) rememberPendingChain(origin, chainId);
      return null;
    });
  });
  // Cheap state peek — used by the main-world bridge right after a switch
  // or add to emit accountsChanged / chainChanged without needing another
  // approval overlay. Only returns the wallet the origin already sees.
  api.onMessage("eth.state", (_p, m) => {
    const origin = fromPage(m);
    if (!ethConnectedFor(origin)) return { address: null, chainIdHex: "0x0", networkVersion: "0" };
    const rt = activeEthRuntime(origin);
    const snap = rt.adapter.snapshot();
    return {
      address: snap.address,
      chainIdHex: "0x" + Number(snap.chainId).toString(16),
      networkVersion: String(snap.chainId),
    };
  });
  // Read passthrough: forward eth_getBalance / eth_call / etc. to the
  // wallet's own configured RPC. Nothing here reveals the private key.
  api.onMessage("eth.rpc", async (p, m) => {
    const origin = fromPage(m);
    const rt = activeEthRuntime(origin);
    const method = String(p && p.method || "");
    const params = (p && p.params) || [];
    if (!/^eth_|^net_|^web3_/.test(method)) throw new Error("Aegis: only eth_/net_/web3_ read methods are passed through");
    // The user's RPC endpoint is theirs (often a keyed, metered one). A site
    // that has not connected gets the three calls every dapp makes before
    // asking to connect and nothing else; signing, account and filter-state
    // methods are never relayed, and broadcasting needs a connection.
    const connected = ethConnectedFor(origin);
    if (!connected && !ETH_RPC_PRECONNECT.has(method)) throw ethError("not connected — call eth_requestAccounts first", 4100);
    if (ETH_RPC_NEVER.test(method)) throw ethError(`Aegis does not relay ${method}`, 4200);
    return rt.adapter._client.call(method, params);
  });

  // ---- Solana (wallet-adapter) ------------------------------------------
  function activeSolRuntime() {
    const selId = selectedWalletId();
    const selRt = selId && ctx.runtimes.get(selId);
    if (selRt && selRt.entry.chain === "sol" && selRt.phase === "ready") return selRt;
    for (const rt of ctx.runtimes.values()) if (rt.entry.chain === "sol" && rt.phase === "ready") return rt;
    throw new Error("no Solana wallet available — add one in the Aegis sidebar");
  }
  function solConnectedFor(origin) { return !!grantFor(api, origin, "sol"); }
  // Is this site already connected? Lets a Wallet Standard "silent" connect
  // (what adapters do on page load to restore a session) succeed without a
  // prompt for a connected site and stay quiet for everyone else.
  api.onMessage("sol.state", (_p, m) => {
    const origin = fromPage(m);
    if (!solConnectedFor(origin)) return { address: null };
    try { const snap = activeSolRuntime().adapter.snapshot(); return { address: snap.address, network: snap.network }; }
    catch { return { address: null }; }
  });
  api.onMessage("sol.connect", async (_p, m) => {
    const origin = fromPage(m);
    const rt = activeSolRuntime();
    const snap = rt.adapter.snapshot();
    if (solConnectedFor(origin)) return { address: snap.address, network: snap.network };
    return withOriginLock(origin, async () => {
      const pick = await api.approvalModal({
        title: "Connect this site to your Solana wallet?",
        origin,
        body: "The site will see this address and can build transactions for you to sign.",
        rows: [
          { label: "Address", value: snap.address, mono: true },
          { label: "Network", value: snap.network === "mainnet" ? "Mainnet-beta" : "Devnet" },
          { label: "Wallet", value: `${rt.entry.label} — Solana · ${snap.network}` },
        ],
        actions: [{ id: "allow", label: "Connect", primary: true }],
        checkbox: { id: "always", label: "Always allow this site to see this address" },
      });
      if (!pick.startsWith("allow")) throw new Error("user rejected");
      setGrant(api, origin, "sol", { readAddress: true, network: snap.network }, pick === "allow+always");
      return { address: snap.address, network: snap.network };
    });
  });
  api.onMessage("sol.signMessage", async (p, m) => {
    const origin = fromPage(m);
    if (!solConnectedFor(origin)) throw new Error("not connected — call solana.connect first");
    const rt = activeSolRuntime();
    const b64 = String(p && p.messageB64 || "");
    const bytes = new Uint8Array(Buffer.from(b64, "base64"));
    if (bytes.length > 16384) throw new Error("message too long");
    // A "message" that parses as a transaction message would, once signed,
    // be a valid transaction signature behind a "moves no SOL" overlay.
    // Phantom refuses these; so do we.
    if (parseSolMessage(bytes, rt.adapter._pub).ok) {
      throw new Error("refusing to sign: this message is a Solana transaction. Use signTransaction.");
    }
    return withOriginLock(origin, async () => {
      const pick = await api.approvalModal({
        title: "Sign a Solana message?",
        origin,
        body: "Signing proves you control this address. It moves no SOL.",
        rows: [
          { label: "Message", value: previewBytes(bytes), mono: true },
          { label: "Address", value: rt.adapter.snapshot().address, mono: true },
        ],
        actions: [{ id: "sign", label: "Sign", primary: true }],
      });
      if (pick !== "sign") throw new Error("user rejected");
      return rt.adapter.signBytes(bytes);
    });
  });
  // Dapp-built transaction the dapp will broadcast itself (window.solana
  // .signTransaction). It used to go through signMessage and its "moves no
  // SOL" overlay; it gets its own decoded overlay now: signing IS sending.
  api.onMessage("sol.signTransaction", async (p, m) => {
    const origin = fromPage(m);
    if (!solConnectedFor(origin)) throw new Error("not connected — call solana.connect first");
    const rt = activeSolRuntime();
    const messageBytes = new Uint8Array(Buffer.from(String(p && p.messageB64 || ""), "base64"));
    const parsed = parseSolMessage(messageBytes, rt.adapter._pub);
    if (!parsed.ok) throw new Error("cannot parse transaction message: " + parsed.error);
    if (parsed.ourIndex < 0) throw new Error("this wallet's key is not among the transaction's account keys");
    if (parsed.ourIndex >= parsed.numRequiredSigs) throw new Error(`this wallet's key is not a required signer (index ${parsed.ourIndex}, requiredSigs ${parsed.numRequiredSigs})`);
    return withOriginLock(origin, async () => {
      const snap = rt.adapter.snapshot();
      const rows = solInstructionRows(parsed);
      rows.push({ label: "Address", value: snap.address, mono: true });
      rows.push({ label: "Wallet", value: `${rt.entry.label} — Solana · ${snap.network}` });
      const pick = await api.approvalModal({
        title: "Sign a Solana transaction?",
        origin,
        body: "The site built this transaction and will broadcast it itself — signing it is the same as sending it.",
        rows,
        actions: [{ id: "sign", label: "Sign", primary: true }],
      });
      if (pick !== "sign") throw new Error("user rejected");
      await requireDappTxPin(origin, "Solana transaction");
      return rt.adapter.signBytes(messageBytes);
    });
  });
  // Dapp-built transaction. The main-world bridge passes the FULL wire
  // (tx.serialize({requireAllSignatures:false, verifySignatures:false}))
  // — signature slots the dapp already filled with partialSign() are
  // preserved; our wallet only overwrites its own slot. That's the only
  // way to sign multi-signer transactions the dapp has partially
  // co-signed (co-signer sigs, ephemeral session keys, etc.).
  api.onMessage("sol.signAndSend", async (p, m) => {
    const origin = fromPage(m);
    if (!solConnectedFor(origin)) throw new Error("not connected — call solana.connect first");
    const rt = activeSolRuntime();
    const wireB64 = String(p && p.wireB64 || "");
    if (!wireB64) throw new Error("wireB64 required (full serialized transaction)");
    const wire = new Uint8Array(Buffer.from(wireB64, "base64"));
    const { sigsStart, messageBytes } = splitSolWire(wire);
    // Legacy and v0 messages both parse (v0 used to be read with its
    // version byte as the header, so the signer lookup was garbage); our
    // key must be a required signer.
    const parsed = parseSolMessage(messageBytes, rt.adapter._pub);
    if (!parsed.ok) throw new Error("cannot parse transaction message: " + parsed.error);
    const { numRequiredSigs, ourIndex } = parsed;
    if (ourIndex < 0) throw new Error("this wallet's key is not among the transaction's account keys");
    if (ourIndex >= numRequiredSigs) throw new Error(`this wallet's key is not a required signer (index ${ourIndex}, requiredSigs ${numRequiredSigs})`);

    return withOriginLock(origin, async () => {
      const snap = rt.adapter.snapshot();
      const rows = solInstructionRows(parsed);
      rows.push({ label: "Address", value: snap.address, mono: true });
      rows.push({ label: "Wallet", value: `${rt.entry.label} — Solana · ${snap.network}` });
      const pick = await api.approvalModal({
        title: "Sign + send a Solana transaction?",
        origin,
        body: "The site built this transaction. Check every instruction — anything marked 'not decoded' is a program Aegis cannot read.",
        rows,
        actions: [{ id: "send", label: "Sign & send", primary: true }],
      });
      if (pick !== "send") throw new Error("user rejected");
      await requireDappTxPin(origin, "Solana transaction");
      // Sign the exact message bytes and patch our slot. signMessage() ran
      // the bytes through String(), so every signature was over "1,2,3,…"
      // and the network rejected it. Partial signatures already in the wire
      // (tx.partialSign()) at other slots are preserved.
      const sigInfo = rt.adapter.signBytes(messageBytes);
      const sigBytes = ctx.d.base58check.decodeBase58(sigInfo.signature);
      if (sigBytes.length !== 64) throw new Error("bad ed25519 signature length");
      const wireOut = new Uint8Array(wire);   // copy so we don't mutate caller
      wireOut.set(sigBytes, sigsStart + ourIndex * 64);
      const wireB58 = ctx.d.base58check.encodeBase58(wireOut);
      const txid = await rt.adapter._client.call("sendTransaction", [wireB58]);
      if (typeof txid !== "string" || !txid.length) throw new Error("bad txid from RPC: " + JSON.stringify(txid));
      setTimeout(() => rt.adapter.refresh().catch(() => {}), 4000);
      return { txid };
    });
  });
}

// ---- activate ---------------------------------------------------------------

module.exports = {
  // Returns a promise that settles once Aegis can serve calls. Aegis starts
  // on first use, so the call that woke it is the first thing it sees, and
  // the host holds that call (up to 5 s) until this promise settles.
  activate(api) {
    // No explicit icon — inherit manifest.icon (branded shield data URI)
    // so the toolbar dock button renders the aegis.x brand mark instead
    // of a fallback emoji. Same id as the panel addon.json declares, which
    // this replaces.
    api.registerSidebarPanel({ id: "main", title: "Wallet", page: "panel.html" });
    // Serve reads from memory. The host's storage.get() does a readFileSync
    // plus a JSON.parse of the ENTIRE add-on store on every single call, on
    // the Electron main thread. fullState() alone reads it seven-odd times
    // (selectedWalletId, walletRoles, walletEntries, snapshotForSelected,
    // the server list...) and emitState() runs on every adapter change, so a
    // large store made opening Aegis hang the whole browser.
    //
    // Safe because this process is the only writer: Aegis's panel talks to
    // the host over addon messages and never touches addon storage directly.
    // If that ever changes, this cache has to go or be invalidated.
    installStorageCache(api, (key) => { if (LAUNCH_START_KEYS.test(key)) syncLaunchStart(api); });
    const c = ctx = {
      api,
      d: null,
      runtimes: new Map(),   // walletId -> { entry, phase, error, adapter }
      priceFeed: require("./lib/prices.js")({
        log: (...a) => api.log("prices", ...a),
        onChange: () => emitState(),
      }),
      // BCMR (CashTokens metadata registry) — resolves category hex to
      // { name, symbol, iconUri, decimals }. Storage-scoped so per-user
      // caches don't stomp each other; disk-cached with 6h TTL.
      bcmr: require("./lib/bcmr.js")({
        storage: api.storage,
        log: (...a) => api.log("bcmr", ...a),
      }),
      wc: null,              // WizardConnect manager, initialised when deps load
    };
    migrateLegacyStorage(api);
    registerPanelMessages(api);
    registerPageMessages(api);
    launchStartAsked = null;
    syncLaunchStart(api);
    // Restore the user's opt-in choice from storage. Off by default so a
    // fresh install never hits any oracle without asking. Source can also
    // be pre-restored so a user who picked Kraken stays on Kraken.
    const savedSource = String(api.storage.get("pricesSource", "") || "").trim();
    if (savedSource) c.priceFeed.setSource(savedSource).catch(() => {});
    if (api.storage.get("pricesEnabled", false)) c.priceFeed.setEnabled(true).catch(() => {});
    // The deps are heavy to evaluate (noble curve precompute, bitcoinjs,
    // libauth, WizardConnect) and that all happens on the main thread. Wait
    // for the browser chrome to paint so the cost never delays Theseus's
    // first frame; older hosts without whenUiReady load immediately.
    const uiReady = typeof api.whenUiReady === "function" ? api.whenUiReady() : Promise.resolve();
    const started = uiReady.then(() => loadDeps(api)).then(async (d) => {
      if (ctx !== c) return;
      c.d = d;
      // Start the WizardConnect manager once deps are ready. Per-wallet
      // adapters get spun up in mountWallet() as each BCH wallet becomes
      // available (only BCH today — hdwalletv1 is BCH-scoped).
      c.wc = require("./lib/wc.js")({
        HDKey: d.HDKey, secp256k1: d.secp256k1, sha256: d.sha256, hkdf: d.hkdf,
        WalletConnectionManager: d.wcWallet.WalletConnectionManager,
        wcCore: d.wcCore, libauth: d.libauth,
        log: (...a) => api.log("wc", ...a),
        api,
        // Bridge sign approvals through the addon's approval-modal capability.
        approvalRequest: async (payload) => {
          // The host overlay only knows `actions`; the old `approve`/`reject`
          // keys fell back to a lone "OK" button whose id never matched, so
          // every WizardConnect signing request was refused, and the HTML
          // body was shown as literal markup.
          const { body, rows, dappName } = buildWcApproval(payload);
          const pick = await api.approvalModal({
            title: "Sign a Bitcoin Cash transaction (WizardConnect)?",
            origin: dappName,
            body, rows,
            actions: [{ id: "approve", label: "Sign", primary: true }],
          });
          if (pick !== "approve") return { approved: false };
          try { await requireDappTxPin(dappName, "Bitcoin Cash transaction (WizardConnect)"); }
          catch (e) { api.log("wc sign:", e?.message || e); return { approved: false }; }
          return { approved: true };
        },
      });
      c.wc.onStateChange(() => emitState());
      await tryAutoUnlock(api);
      // vault.derive() polls until the user unlocks, so with a locked vault
      // mountAllWallets() never settles. Only wait for it when the vault is
      // open; otherwise the waking call gets the usual locked answer now
      // rather than after the host's 5 s timeout.
      const st = await api.vault.lifecycle.status().catch(() => null);
      const mounting = mountAllWallets();
      if (st && st.unlocked) await mounting;
      else mounting.catch((e) => api.log("mount:", e?.message || e));
    });
    started.catch((e) => {
      if (ctx !== c) return;
      api.log("startup failed:", e?.message);
      emitState();
    });
    return started.catch(() => {});
  },
  deactivate() {
    const c = ctx; ctx = null;
    if (!c) return;
    try { c.priceFeed && c.priceFeed.dispose(); } catch {}
    for (const rt of c.runtimes.values()) {
      try { rt.adapter && rt.adapter.dispose(); } catch {}
    }
    c.runtimes.clear();
  },
};