feat: multi-sig escrow release + Stellar HTLC bridge + relayer (#564, #565) - #650
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Smartdevs17 merged 1 commit intoJul 28, 2026
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Smartdevs17#564: Multi-sig escrow release with configurable threshold policies - Added MultisigEscrowPolicy type with configurable threshold per project - Implemented createReleaseRequest, approveReleaseRequest, rejectReleaseRequest - Time-locked release with challenge periods (challengeEndsAt) - Event emission for all signature submissions via EventEmitter - Blocking threshold: rejects block when count >= (signers - threshold + 1) - executeReadyReleases() sweeps all eligible requests - 9 unit tests covering full lifecycle Smartdevs17#565: Cross-chain HTLC bridge for Stellar-EVM transfers - Added HtlcLock, HtlcStatus, BridgeConfigData types to Soroban contract - Implemented create_htlc_lock, claim_htlc (SHA-256 secret verification), refund_htlc on Stellar side - Bridge config with fee_bps, fee_collector, pause controls - BridgeRelayerService: monitors cross-chain swaps, manages lifecycle (initiated -> locked -> redeemed/expired), emits events - Relayer REST API: POST/GET /swaps, POST /reveal, /config, /analytics - 8 unit tests for relayer service Closes Smartdevs17#564 Closes Smartdevs17#565
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Summary
Implements cross-chain HTLC bridge and multi-sig escrow release features.
#564 - Multi-signature escrow release with configurable threshold policies
The escrow release mechanism was single-signature, posing trust issues for high-value transactions. Now supports configurable M-of-N threshold policies per project.
Changes:
backend/src/services/escrow.ts: AddedMultisigEscrowPolicy,MultisigReleaseRequesttypes. New methods:createReleaseRequest(),approveReleaseRequest(),rejectReleaseRequest(),executeReadyReleases(). Event emission viaEventEmitterfor all signature submissions.backend/src/routes/escrow.ts: New endpoints for/release-request,/release-request/approve,/release-request/reject,/execute-ready-releases.#565 - Cross-chain bridge with HTLC atomic swap for Stellar-EVM transfers
The EVM
BridgeHTLC.solalready existed. This adds the Stellar Soroban HTLC contract and a relayer service for coordinating swaps.Changes:
contracts/src/lib.rs: AddedHtlcLock,HtlcStatus,BridgeConfigDatatypes. New contract functions:init_bridge_config,update_bridge_config,create_htlc_lock,claim_htlc(SHA-256 verification),refund_htlc,get_htlc_lock,get_bridge_config. 4 contract tests.backend/src/services/bridge-relayer.ts:BridgeRelayerService- monitors cross-chain swaps through their lifecycle (initiated -> locked -> redeemed/expired).backend/src/routes/relayer.ts: REST API for swap management, secret reveal, config, and analytics.Closes #564
Closes #565