feat(contracts): multisig event registry (#292) + event batch (#293) + DID resolver (#295)#400
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…atch utility (soroventures#293) + DID resolver (soroventures#295) Three new Soroban contracts added under contracts/, each with its own docs/<name>.md file. soroventures#292 — Contract: Multi-Signature Registry for High-Value Event Emission - New contract `multisig_event_registry`. - M-of-N signer set configured at init; admin can override per-event-type threshold via `set_threshold`. - `propose(event_type, topic2, data)` → returns proposal_id and records the proposer's vote; `approve(proposal_id)` auto-executes once the threshold is met, emitting both the underlying caller-requested event AND a `ms_attest` event with the full signer-approval list for non-repudiation. `cancel(proposal_id)` callable by proposer/admin. - 7 tests cover: threshold-1 instant execution, threshold-2 with second approval, non-signer rejected, double-approve rejected, per-event threshold override, proposer cancellation, init validation. soroventures#293 — Contract: Gas-Optimized Event Batching Utility Contract - New contract `event_batch`. - `emit_batch(sender, entries: Vec<EventEntry>) -> u32` emits up to MAX_BATCH_SIZE (64) events plus a single `batch_emt` summary in one invocation, amortizing dispatch + auth overhead. - `EventEntry { topic, topic2, data: Bytes }` carries type-erased payloads so a single batch can mix event shapes. - 5 tests cover: 2-event batch + summary, dual-topic entry, empty batch rejected, oversized batch rejected, full MAX_BATCH_SIZE batch. soroventures#295 — Contract: Decentralized Identity (DID) Resolver on Soroban - New contract `did_resolver`. - W3C-DID-Core CRUD: register/update/resolve/revoke. DID documents stored as opaque `Bytes` keyed by `String` (intended to be the full `did:soroban:<id>` string). Single controller per DID. - Monotonic `version` counter on update; revoked DIDs resolve to `Some(doc)` with `status = Revoked` rather than `None`, and are non-recyclable. - Every state transition emits a `did_attst` event with `(did, controller, version)` — the event-based identity-verification hook called out in the issue's technical requirements. - 9 tests cover: register+resolve, unknown returns None, double-register rejected, update bumps version + emits identity attestation, non- controller cannot update, revoke still resolves, cannot update after revoke, empty did rejected, multi-update identity attestation stream. Workspace: - All three crates added to contracts/Cargo.toml workspace members. - 21/21 tests pass; release builds clean. - Docs added under docs/ matching the existing per-contract doc style.
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Summary
Three new Soroban contracts added under
contracts/, each with its owndocs/<name>.mdreference doc.Issue #292 — Multi-Signature Registry for High-Value Event Emission
New contract:
contracts/multisig_event_registryinit; admin can override per-event-type threshold viaset_threshold(event_type, threshold).propose(event_type, topic2, data)returnsproposal_idand records the proposer's vote.approve(proposal_id)auto-executes once the threshold is met, emitting both the underlying caller-requested event and ams_attestevent with(proposal_id, event_type, approvals: Vec<Address>)for non-repudiation.cancel(proposal_id)callable by proposer or admin while pending.Issue #293 — Gas-Optimized Event Batching Utility Contract
New contract:
contracts/event_batchemit_batch(sender, entries: Vec<EventEntry>) -> u32emits up toMAX_BATCH_SIZE (64)events plus a singlebatch_emtsummary in one invocation, amortizing dispatch + auth overhead.EventEntry { topic, topic2: Bytes, data: Bytes }is storage-efficient: topics are inline, payload is type-erased so a single batch can mix event shapes.Issue #295 — Decentralized Identity (DID) Resolver on Soroban
New contract:
contracts/did_resolverByteskeyed bydid:soroban:<id>. Single controller per DID. Monotonic version counter on update; revoked DIDs resolve toSome(doc)withstatus = Revoked(notNone) and are non-recyclable.did_attstevent with(did, controller, version)— a verifier can subscribe and react without polling.resolve(did)andstatus(did)read directly from persistent storage.Acceptance Criteria
docs/multisig_event_registry.mddocs/event_batch.mddocs/did_resolver.mdVerification
cargo build -p event-horizon-multisig-event-registry \ -p event-horizon-event-batch \ -p event-horizon-did-resolver # ✅ cargo test -p event-horizon-multisig-event-registry \ -p event-horizon-event-batch \ -p event-horizon-did-resolver # ✅ 21/21 tests passAll three crates added to
contracts/Cargo.tomlworkspace members. Test snapshots are committed alongside the tests.Closes #292
Closes #293
Closes #295