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Non-custodial swaps via Boltz, fully client-side: hal holds the swap key +
preimage and claims (reverse) / refunds (submarine) on-chain via the taproot
script path, so Boltz can never strand funds.
- src/swap.js: tapleaf/tree construction (byte-exact vs boltz-core vectors),
swap P2TR address derivation (MuSig2 internal key + taptweak), script-path
claim/refund tx builder, bolt11 decode, Boltz api-v2 client, and a polling
SwapManager (reverse auto-claim; submarine fund + status + refund).
- wallet.js: deterministic swap-key derivation (dedicated chain) + persistence.
- api.js: configurable Boltz REST/WS endpoints.
- app.js: ⚡ Swap tab — Receive over LN (reverse) + Pay an invoice (submarine).
- tools/swap-*.test.js: vectors, live-address, and end-to-end regtest tests.
Verified end-to-end on regtest against a local Boltz wired to coinos's bc +
a dedicated CLN/hold node.
Co-Authored-By: Claude Opus 4.8 <[email protected]>
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