Turns the single-account BCH addon into Aegis: a chain-agnostic wallet manager
with a wallet picker in the sidebar header, per-wallet sub-accounts, and Tron
mainnet + Nile alongside BCH. Add-on id stays "bchwallet" so vault-derive paths
stay in the same namespace and the legacy BCH default wallet uses PURPOSE
"bchwallet/mainnet/0" byte-identical to before — funds are untouched.
- lib/chain-bch.js wraps the existing keys/tx/wallet/electrum stack with the
common adapter shape and scopes each wallet's storage under wallets/<id>/…
- lib/chain-tron.js: m/44'/195'/0'/0/0 → secp256k1 → keccak256 → 0x41 || h20
→ base58check. Balance + history via TronGrid v1, send via createtransaction
+ sha256(raw_data_hex) sign + broadcasttransaction. Mainnet and Nile share
the address format; different vault paths mean different keys so a mainnet
wallet can never accidentally sign against Nile.
- lib/base58check.js: bitcoin-alphabet base58 with sha256d checksum. k=1
derivation verified against Ethereum's canonical k=1 H160 in a scratchpad
harness (correct-by-construction for Tron address).
- Combined wallet-inject.js: window.bitcoincash on .x pages (unchanged gate),
window.tronWeb + window.tronLink on any https page. tron_requestAccounts
triggers the approval overlay; sign / sendRawTransaction / signMessageV2
route to the currently-selected Tron wallet. Emits accountsChanged /
setNode messages TronLink dapps listen for; chain ids 0x2b6653dc /
0xcd8690dc match what TronLink itself uses.
- New panel: chain-aware wallet picker in the header (badges 🟨 BCH,
🔴 Tron, 🔵 Nile), Add-wallet dropdown per chain, per-chain unit picker
(BCH/sat, TRX/sun), per-wallet rename + remove (isLegacy default is
protected). Sends show the chosen wallet in the approval overlay so the
user can never mistake sub-account.
- Migration on first launch: pre-multi-wallet storage (top-level
receiveCursor / txCache) is rehomed under wallets/bch-default/… and the
legacy account path is preserved.
Not shipped: user is bundling into the next release. Live Nile broadcast +
real dapp connect need a set-up vault; the code paths are unit-verified end
to end but a testnet send + tronscan.io/nile connect are user-side steps.
The dapp send approval gains an "Afterwards" dropdown: ask every time, or
allow up to 0.001 / 0.01 / 0.1 BCH more without asking. The allowance is
stored as permissions[origin].sendTx {capSats, usedSats}; sends within the
remainder go through silently and draw it down, a larger request re-prompts
(showing what is left) and the choice made there replaces the allowance.
No unlimited option. Settings > Connected sites shows the remaining budget
and Revoke clears it. Message signing still asks every time.
Host: approvalModal accepts `select` {id, label, options}; a chosen value
comes back as "+<id>=<value>" and is validated against the offered options.
wallet-inject.js runs in the isolated world of https://*.x pages and exposes
window.bitcoincash { isTheseus, version, network, getAddress, signAndSend,
signMessage }. Every call is routed page -> addon-page-msg -> activate()
handler -> approval overlay showing the requesting origin:
- getAddress: approval with an "always allow" checkbox; grants persist in
api.storage.permissions and are listed/revocable under Settings.
- signAndSend / signMessage: approval on every call, never remembered.
signMessage returns a BIP-137 recoverable signature (verified offline).
- one pending approval per origin; page-facing errors never echo balance.
Host fix: the inject IPC assigned event.returnValue twice, so pages always
got an empty script list.
Send tab: recipient (cashaddr or legacy, testnet rejected), amount with
BCH/sat toggle and Max, 1-5 sat/B fee slider, live fee/total preview via
planSend. Sending goes plan -> approval-modal (To/Amount/Fee/Total) ->
ECDSA DER + SIGHASH_ALL|FORKID -> blockchain.transaction.broadcast, then
shows the txid with an explorer link. Confirmed coins are spent before
unconfirmed; dust change folds into the fee. Verified end to end against a
fake Fulcrum: broadcast tx re-parsed, sighash recomputed, signature checks.
Manifest declaring sidebar-panel, vault-derive, page-inject (https://*.x)
and approval-modal; registers the Wallet sidebar panel. Shows up in
Settings > Extensions and opens from the sidebar.
