archetech / archon / 22914495510

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feat: Add server-side BTC wallet service (#183)

* feat: Add server-side BTC wallet service (#182)

Watch-only descriptor wallet using Keymaster-derived BIP-84 keys.
Derives tpub/xpub from mnemonic, imports into bitcoind as watch-only,
signs transactions server-side via PSBT workflow.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: Include key origin info in wallet descriptors for PSBT signing

Without origin info, bitcoind records derivation paths relative to the
account key instead of the full path from root, causing signing to
derive the wrong private key.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* refactor: Rename wallet compose file to wallet-signet

Prepares for separate compose files per network (mainnet, signet, etc.).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* feat: Add anchor and bump-fee endpoints to wallet service

- POST /wallet/anchor: creates OP_RETURN tx via PSBT, signs, broadcasts
- POST /wallet/bump-fee: RBF fee bump using psbtbumpfee for watch-only
- Refactor signing logic into shared signAndBroadcast helper

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* fix: Use node ID in default watch wallet name for uniqueness

Shared Bitcoin Core nodes may host wallets from multiple Archon
instances. Default wallet name is now archon-watch-<nodeId> to
avoid collisions.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* refactor: Use wallet service for satoshi-mediator anchoring

Replace direct bitcoind wallet operations with wallet service API calls:
- OP_RETURN anchoring via POST /wallet/anchor
- RBF fee bumps via POST /wallet/bump-fee
- Balance/address checks via GET /wallet/balance, /wallet/address
- Remove wallet creation from mediator startup

Chain queries (block scanning, mempool) remain direct bitcoind RPC.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* refactor: Merge wallet into mediator compose files, add auto-setup

- Merge wallet-signet/mainnet/te... (continued)

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