314bce0905
- eth_sendTransaction dropped the calldata, gas and fee fields, so an ERC-20 transfer went out as a 0-value send to the token contract and any contract call was broadcast as something else. plan() now carries data/gas/fee caps/nonce, estimates gas for calls, and the overlay decodes transfer/approve/permit/setApprovalForAll, flags unlimited approvals and calldata to a non-contract, and shows estimated vs max fee. - personal_sign signed the hex string ethers/viem send as literal text; it now signs the decoded bytes. - wallet_switchEthereumChain flipped the global selected wallet, so any site could move every connected dapp to another chain. Chain is now per origin; the sidebar selection no longer redirects a dapp. - wallet_addEthereumChain silently persisted a connection for chains Aegis already had, handing the address to any site. Adding a chain no longer grants anything, and RPC URLs must be https. - eth_sign (blind hash signing) is disabled, as in MetaMask.
436 lines
19 KiB
JavaScript
436 lines
19 KiB
JavaScript
// Ethereum (EVM) chain adapter — mainnet + Sepolia testnet. One address per
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// wallet, the same "TronLink shape" as chain-tron.js: BIP44 derivation,
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// secp256k1 → keccak256 address, JSON-RPC backend, EIP-1559 send.
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//
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// Kept intentionally minimal:
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// - Native ETH only. ERC-20 token support is a follow-up: it needs a token
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// registry + eth_call for `balanceOf(address)` per token + a dedicated
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// Send flow that builds an ERC-20 `transfer(to, value)` calldata.
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// - No transaction history: without an indexer (Etherscan V2 / Alchemy)
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// the JSON-RPC alone can't answer "which txs touched this address".
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// The panel shows an empty history with a link to Etherscan.
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// - EIP-1559 only (type 0x02). Legacy type 0x00 works too but isn't
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// needed for mainnet or Sepolia in 2026.
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const NETWORKS = {
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mainnet: {
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id: "mainnet", label: "Mainnet", chainId: 1,
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// Cloudflare's public Ethereum gateway — no key required, rate-limited
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// but adequate for a per-user wallet. User can override in settings.
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defaultRpc: "https://cloudflare-eth.com",
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explorerTx: "https://etherscan.io/tx/",
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explorerAddr: "https://etherscan.io/address/",
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faucet: null,
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},
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sepolia: {
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id: "sepolia", label: "Sepolia testnet", chainId: 11155111,
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defaultRpc: "https://ethereum-sepolia-rpc.publicnode.com",
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explorerTx: "https://sepolia.etherscan.io/tx/",
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explorerAddr: "https://sepolia.etherscan.io/address/",
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faucet: "https://sepoliafaucet.com/",
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},
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};
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module.exports = function makeEthAdapter({ HDKey, secp256k1, keccak_256 }) {
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if (!HDKey || !secp256k1 || !keccak_256) throw new Error("chain-eth: missing dep");
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const toHex = (b) => Buffer.from(b).toString("hex");
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const fromHex = (h) => Uint8Array.from(Buffer.from(String(h).replace(/^0x/i, ""), "hex"));
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const stripHex = (h) => String(h).replace(/^0x/i, "");
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const hexToBig = (h) => BigInt("0x" + (stripHex(h) || "0"));
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const bigToHex = (n) => "0x" + BigInt(n).toString(16);
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const zeroBig = 0n;
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// ---- addresses -------------------------------------------------------
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// EIP-55 mixed-case checksum: lowercase hex, then flip case per keccak256
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// of the lowercase hex string (a-f digits get uppercased where the keccak
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// nibble is >= 8). Never needed for wire format (RPCs accept lowercase),
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// but it's what wallets show, so we return it that way.
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function eip55(addressLowerHex) {
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const lower = stripHex(addressLowerHex).toLowerCase();
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const hash = toHex(keccak_256(Buffer.from(lower, "utf8")));
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let out = "0x";
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for (let i = 0; i < lower.length; i++) {
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const c = lower[i];
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out += /[0-9]/.test(c) ? c : (parseInt(hash[i], 16) >= 8 ? c.toUpperCase() : c);
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}
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return out;
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}
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function addressFromPubkey(uncompressed) {
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const inner = uncompressed.slice(1);
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const h = keccak_256(inner);
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const h20 = h.slice(h.length - 20);
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return eip55(toHex(h20));
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}
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function decodeAddress(str) {
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const s = String(str || "").trim();
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const hex = stripHex(s);
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if (!/^[0-9a-fA-F]{40}$/.test(hex)) throw new Error("bad Ethereum address");
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// Reject checksum mismatches on mixed-case inputs (all-lower and all-upper
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// pass unconditionally — that's the EIP-55 rule).
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const lower = hex.toLowerCase(), upper = hex.toUpperCase();
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if (hex !== lower && hex !== upper) {
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const want = stripHex(eip55(lower));
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if (hex !== want) throw new Error("EIP-55 checksum failed");
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}
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return "0x" + lower;
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}
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// ---- RLP encode ------------------------------------------------------
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// Minimal encoder — enough for EIP-1559 tx encoding. Follows the RLP spec
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// (single byte < 0x80 → self; short string ≤ 55 → 0x80 + len + bytes;
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// long string → 0x80 + 55 + lenOfLen + lenBytes + bytes; lists similarly
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// with 0xc0/0xf7).
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function rlpEncodeBytes(bytes) {
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const b = Uint8Array.from(bytes);
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if (b.length === 1 && b[0] < 0x80) return b;
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if (b.length <= 55) return concat(Uint8Array.from([0x80 + b.length]), b);
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const lenBytes = encodeIntBE(b.length);
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return concat(Uint8Array.from([0xb7 + lenBytes.length]), lenBytes, b);
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}
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function rlpEncodeList(items) {
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const encoded = items.map(rlpEncode);
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const body = concat(...encoded);
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if (body.length <= 55) return concat(Uint8Array.from([0xc0 + body.length]), body);
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const lenBytes = encodeIntBE(body.length);
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return concat(Uint8Array.from([0xf7 + lenBytes.length]), lenBytes, body);
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}
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function rlpEncode(item) {
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if (item instanceof Uint8Array) return rlpEncodeBytes(item);
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if (Array.isArray(item)) return rlpEncodeList(item);
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if (typeof item === "bigint") return rlpEncodeBytes(bigToBytes(item));
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if (typeof item === "number") return rlpEncodeBytes(bigToBytes(BigInt(item)));
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if (typeof item === "string") return rlpEncodeBytes(item.startsWith("0x") ? fromHex(item) : Buffer.from(item, "utf8"));
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throw new Error("rlp: unsupported item type " + typeof item);
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}
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function bigToBytes(v) {
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if (v < 0n) throw new Error("negative bigint");
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if (v === 0n) return new Uint8Array(0);
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let hex = v.toString(16);
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if (hex.length % 2) hex = "0" + hex;
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return fromHex(hex);
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}
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function encodeIntBE(n) {
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let hex = n.toString(16);
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if (hex.length % 2) hex = "0" + hex;
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return fromHex(hex);
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}
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function concat(...ps) {
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const n = ps.reduce((a, p) => a + p.length, 0);
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const out = new Uint8Array(n); let k = 0;
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for (const p of ps) { out.set(p, k); k += p.length; }
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return out;
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}
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// ---- signing ---------------------------------------------------------
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// EIP-1559 signed tx: 0x02 || RLP([chainId, nonce, maxPriorityFeePerGas,
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// maxFeePerGas, gasLimit, to, value, data, accessList,
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// yParity, r, s])
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// hash-to-sign: keccak256(0x02 || RLP([...same-without-sig-fields]))
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function signTxEip1559(unsignedFields, privKey) {
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const unsignedRlp = rlpEncodeList(unsignedFields);
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const preimage = concat(Uint8Array.from([0x02]), unsignedRlp);
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const hash = keccak_256(preimage);
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const sig = secp256k1.sign(hash, privKey, { prehash: false, lowS: true, format: "recovered" });
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// noble returns [recid || r(32) || s(32)]; EIP-1559 uses yParity as
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// 0 or 1 (recid directly, no +27 shift).
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const yParity = sig[0];
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const r = sig.subarray(1, 33);
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const s = sig.subarray(33, 65);
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const signedFields = [...unsignedFields, yParity, stripLeadingZeros(r), stripLeadingZeros(s)];
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const signedRlp = rlpEncodeList(signedFields);
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return "0x" + toHex(concat(Uint8Array.from([0x02]), signedRlp));
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}
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function stripLeadingZeros(bytes) {
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let i = 0;
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while (i < bytes.length - 1 && bytes[i] === 0) i++;
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return bytes.subarray(i);
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}
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// ---- JSON-RPC client -------------------------------------------------
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function makeClient(rpcUrl) {
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let seq = 1;
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async function call(method, params = []) {
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const r = await fetch(rpcUrl, {
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method: "POST",
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headers: { "content-type": "application/json" },
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body: JSON.stringify({ jsonrpc: "2.0", id: seq++, method, params }),
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});
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if (!r.ok) throw new Error(`${method}: HTTP ${r.status}`);
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const j = await r.json();
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if (j.error) throw new Error(`${method}: ${j.error.message || JSON.stringify(j.error)}`);
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return j.result;
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}
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return { url: rpcUrl, call };
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}
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// Accept wei as bigint, integer string, hex string or number.
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function toBig(v) {
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if (typeof v === "bigint") return v;
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const s = String(v ?? "0").trim();
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if (/^0x[0-9a-f]+$/i.test(s)) return BigInt(s);
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if (/^-?\d+$/.test(s)) return BigInt(s);
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return BigInt(Math.round(Number(s) || 0));
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}
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// Calldata as "0x" + even-length lowercase hex; "" / null / "0x" → "0x".
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function normalizeData(data) {
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const s = String(data ?? "").trim().toLowerCase();
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if (!s || s === "0x") return "0x";
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const h = s.startsWith("0x") ? s.slice(2) : s;
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if (!/^[0-9a-f]*$/.test(h) || h.length % 2) throw new Error("tx.data must be even-length hex");
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return "0x" + h;
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}
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// ---- calldata decode (overlay only) -----------------------------------
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// The handful of selectors behind almost every phishing loss. Anything
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// else is shown as "<selector> + N bytes" so the user at least sees that
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// it is a contract call they cannot read.
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const SELECTORS = {
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a9059cbb: { name: "transfer", args: ["to", "amount"] },
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"095ea7b3": { name: "approve", args: ["spender", "amount"] },
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"23b872dd": { name: "transferFrom", args: ["from", "to", "amount"] },
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a22cb465: { name: "setApprovalForAll", args: ["operator", "approved"] },
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"39509351": { name: "increaseAllowance", args: ["spender", "amount"] },
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d505accf: { name: "permit", args: ["owner", "spender", "value", "deadline"] },
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};
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const UINT256_MAX = (1n << 256n) - 1n;
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function decodeCalldata(dataHex) {
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const h = normalizeData(dataHex).slice(2);
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if (h.length < 8) return null;
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const selector = h.slice(0, 8);
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const spec = SELECTORS[selector];
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const words = [];
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for (let i = 8; i + 64 <= h.length; i += 64) words.push(h.slice(i, i + 64));
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const out = { selector, name: spec ? spec.name : null, bytes: h.length / 2 };
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if (!spec || words.length < spec.args.length) return out;
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spec.args.forEach((a, i) => {
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const w = words[i];
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if (a === "amount" || a === "value" || a === "deadline") out[a] = BigInt("0x" + w);
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else if (a === "approved") out[a] = BigInt("0x" + w) !== 0n;
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else out[a] = eip55(w.slice(24));
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});
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const amt = out.amount ?? out.value;
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if (amt != null) out.unlimited = amt >= (1n << 255n) || amt === UINT256_MAX;
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return out;
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}
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function scopedStorage(storage, keyPrefix) {
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const k = (key) => keyPrefix + key;
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return {
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get: (key, fallback = null) => storage.get(k(key), fallback),
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set: (key, value) => storage.set(k(key), value),
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};
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}
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// ---- wallet ----------------------------------------------------------
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class EthWallet {
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constructor(root32, networkId, {
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walletId, storage, log = () => {}, onChange = () => {}, rpcUrl,
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customNetwork, // { id, label, chainId, defaultRpc, explorerTx, explorerAddr, ticker } for EIP-3085 chains
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} = {}) {
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if (!walletId) throw new Error("chain-eth: walletId required");
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const net = customNetwork || NETWORKS[networkId];
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if (!net) throw new Error(`chain-eth: unknown network ${networkId}`);
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this.walletId = walletId;
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this.chain = "eth";
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this.network = net.id;
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this._net = net;
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this._ticker = net.ticker || "ETH";
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this.log = log;
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this.onChange = onChange;
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this.storage = scopedStorage(storage, `wallets/${walletId}/`);
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const master = HDKey.fromMasterSeed(root32);
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// BIP44 for Ethereum: m/44'/60'/0'/0/0 is the canonical first address.
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const node = master.derive("m/44'/60'/0'/0/0");
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this._priv = node.privateKey;
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this._pubUncompressed = secp256k1.getPublicKey(this._priv, false);
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this.address = addressFromPubkey(this._pubUncompressed);
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this._root = new Uint8Array(root32);
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this._client = makeClient(String(rpcUrl || "").trim() || net.defaultRpc);
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this._state = {
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balance: { confirmed: "0", unconfirmed: "0" },
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history: [],
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height: 0,
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scanning: false,
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error: null,
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};
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this._pollTimer = null;
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}
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setRpcUrl(url) {
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const v = String(url || "").trim() || this._net.defaultRpc;
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this._client = makeClient(v);
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this._emit();
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}
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_emit() { try { this.onChange(); } catch {} }
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// Wei is 10^18 native units; the panel formats via decimals=18. The
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// ticker follows the chain's nativeCurrency (ETH on mainnet/Sepolia,
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// MATIC on Polygon, etc.) so the send-approval overlay reads correctly.
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snapshot() {
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return {
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chain: "eth", network: this._net.id, ticker: this._ticker, decimals: 18,
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address: this.address, addressIndex: 0,
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addressPath: "m/44'/60'/0'/0/0",
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balance: this._state.balance,
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height: this._state.height,
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history: this._state.history,
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scanning: this._state.scanning,
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error: this._state.error,
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server: this._client.url,
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rpcUrl: this._client.url,
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explorerTx: this._net.explorerTx,
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explorerAddr: this._net.explorerAddr,
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faucet: this._net.faucet,
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chainId: this._net.chainId,
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};
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}
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async refresh() {
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if (this._state.scanning) return;
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this._state.scanning = true; this._state.error = null; this._emit();
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try {
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const [bal, block] = await Promise.all([
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this._client.call("eth_getBalance", [this.address, "latest"]),
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this._client.call("eth_blockNumber", []),
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]);
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this._state.balance = { confirmed: hexToBig(bal).toString(), unconfirmed: "0" };
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this._state.height = Number(hexToBig(block));
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} catch (e) {
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this._state.error = e?.message || String(e);
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this.log("refresh failed:", this._state.error);
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} finally {
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this._state.scanning = false;
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this._emit();
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}
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}
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schedulePoll(ms = 20_000) {
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clearTimeout(this._pollTimer);
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this._pollTimer = setTimeout(() => this.refresh().finally(() => this.schedulePoll(ms)), ms);
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}
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// Draft a transaction. The panel passes {to, amount, sendMax}; the dapp
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// bridge (eth_sendTransaction) additionally passes data, gasLimit, fee
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// caps and nonce exactly as the dapp supplied them. Every field the dapp
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// set is honoured — the overlay then shows what will really be signed.
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// Zero value is fine when there is calldata (ERC-20 transfer/approve).
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async plan({ to, amount, sendMax, data, gasLimit, maxFeePerGas, maxPriorityFeePerGas, gasPrice, nonce }) {
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const dest = decodeAddress(to);
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const dataHex = normalizeData(data);
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const dataBytes = fromHex(dataHex.slice(2));
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const from = this.address.toLowerCase();
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const [nonceHex, priorityHex, gasPriceHex] = await Promise.all([
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nonce != null ? Promise.resolve(bigToHex(toBig(nonce))) : this._client.call("eth_getTransactionCount", [from, "pending"]),
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this._client.call("eth_maxPriorityFeePerGas", []).catch(() => "0x59682f00"), // fallback: 1.5 gwei
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this._client.call("eth_gasPrice", []),
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]);
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const nonceN = Number(hexToBig(nonceHex));
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const tip = maxPriorityFeePerGas != null ? toBig(maxPriorityFeePerGas) : hexToBig(priorityHex);
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// eth_gasPrice on a 1559 chain already includes a tip, so it is the
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// best single-number estimate of what a block will actually charge.
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const gasPriceNow = hexToBig(gasPriceHex);
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// Cap: dapp-supplied maxFeePerGas (or legacy gasPrice) wins; otherwise
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// 2 × current price + tip so the tx survives a base-fee spike.
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const maxFee = maxFeePerGas != null ? toBig(maxFeePerGas)
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: (gasPrice != null ? toBig(gasPrice) : gasPriceNow * 2n + tip);
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const bal = BigInt(this._state.balance.confirmed || "0");
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let value = sendMax ? 0n : toBig(amount);
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if (value < 0n) throw new Error("amount must be >= 0 wei");
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if (!sendMax && value === 0n && dataBytes.length === 0) throw new Error("amount must be > 0 wei");
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// Gas: dapp value if given; 21000 for a plain transfer; otherwise ask
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// the node. A revert here surfaces as a clear error BEFORE the overlay,
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// which doubles as a cheap "would this even succeed" simulation.
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let gas;
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if (gasLimit != null) gas = toBig(gasLimit);
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else if (dataBytes.length === 0) gas = 21000n;
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else {
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let est;
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try { est = await this._client.call("eth_estimateGas", [{ from, to: dest, value: bigToHex(value), data: dataHex }]); }
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catch (e) { throw new Error("transaction would fail (eth_estimateGas): " + (e?.message || e)); }
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gas = (hexToBig(est) * 12n) / 10n; // 20% headroom, as MetaMask does
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}
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if (gas < 21000n) throw new Error("gas limit below 21000");
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const feeMax = gas * maxFee;
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const feeEstimate = gas * (gasPriceNow < maxFee ? gasPriceNow : maxFee);
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if (sendMax) {
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if (bal <= feeMax) throw new Error("balance does not cover the gas fee");
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value = bal - feeMax;
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} else if (value + feeMax > bal) {
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throw new Error("insufficient funds");
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}
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return {
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_draft: {
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chainId: this._net.chainId, nonce: nonceN, maxPriorityFeePerGas: tip, maxFeePerGas: maxFee,
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gasLimit: gas, to: dest, value, data: dataHex, accessList: [],
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},
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recipients: [{ to: dest, value: value.toString() }],
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fee: feeMax.toString(), // worst case — what the balance check uses
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feeEstimate: feeEstimate.toString(), // what a block will most likely charge
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feeRate: maxFee.toString(),
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gasLimit: gas.toString(),
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data: dataHex,
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inputs: [],
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change: "0",
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total: (value + feeMax).toString(),
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};
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}
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async signAndBroadcast(plan) {
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const d = plan && plan._draft;
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if (!d) throw new Error("bad plan");
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const unsignedFields = [
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d.chainId, d.nonce, d.maxPriorityFeePerGas, d.maxFeePerGas, d.gasLimit,
|
||
fromHex(d.to.slice(2)), d.value, fromHex(normalizeData(d.data).slice(2)), [],
|
||
];
|
||
const rawTxHex = signTxEip1559(unsignedFields, this._priv);
|
||
const txid = await this._client.call("eth_sendRawTransaction", [rawTxHex]);
|
||
if (typeof txid !== "string" || !/^0x[0-9a-f]{64}$/i.test(txid)) throw new Error("bad txid from RPC: " + JSON.stringify(txid));
|
||
this.log("broadcast", txid);
|
||
setTimeout(() => this.refresh(), 3000);
|
||
return { txid };
|
||
}
|
||
|
||
// EIP-712: sign a pre-computed typed-data digest with r||s||v (v = 27+recid).
|
||
signTypedDataDigest(digest32) {
|
||
const sig = secp256k1.sign(digest32, this._priv, { prehash: false, lowS: true, format: "recovered" });
|
||
const out = new Uint8Array(65);
|
||
out.set(sig.subarray(1), 0);
|
||
out[64] = sig[0] + 27;
|
||
return { address: this.address, signature: "0x" + toHex(out) };
|
||
}
|
||
// Ethereum personal_sign: keccak256("\x19Ethereum Signed Message:\n" + len + msg).
|
||
// `message` is the exact bytes to sign (Uint8Array) or a plain string;
|
||
// the caller (index.js) is responsible for hex-decoding what dapps send.
|
||
signMessage(message) {
|
||
const enc = new TextEncoder();
|
||
const body = message instanceof Uint8Array ? message : enc.encode(String(message));
|
||
const prefix = enc.encode("\x19Ethereum Signed Message:\n" + body.length);
|
||
const buf = concat(prefix, body);
|
||
const hash = keccak_256(buf);
|
||
const sig = secp256k1.sign(hash, this._priv, { prehash: false, lowS: true, format: "recovered" });
|
||
// personal_sign format: r || s || v where v = 27 + recid.
|
||
const out = new Uint8Array(65);
|
||
out.set(sig.subarray(1), 0);
|
||
out[64] = sig[0] + 27;
|
||
return { address: this.address, signature: "0x" + toHex(out) };
|
||
}
|
||
|
||
recovery() {
|
||
// Ethereum wallets typically expose the raw private key hex; we do too,
|
||
// but only when the caller re-confirms in the approval overlay upstream.
|
||
return {
|
||
accountPath: "m/44'/60'/0'/0/0",
|
||
xpub: "0x" + toHex(this._pubUncompressed),
|
||
xprv: "0x" + toHex(this._priv),
|
||
};
|
||
}
|
||
|
||
dispose() {
|
||
clearTimeout(this._pollTimer);
|
||
try { this._priv && this._priv.fill(0); } catch {}
|
||
try { this._root && this._root.fill(0); } catch {}
|
||
}
|
||
}
|
||
|
||
return { EthWallet, NETWORKS, addressFromPubkey, decodeAddress, eip55, decodeCalldata, normalizeData, toBig };
|
||
};
|