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Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

Unreleased

0.1.0 - 2026-03-25

Added

  • initialize(admin, ttl_days) — deploy and set the contract administrator with configurable storage TTL.
  • register_issuer(admin, issuer) — admin registers a trusted attestation issuer.
  • remove_issuer(admin, issuer) — admin removes an issuer from the registry.
  • is_issuer(address) — query whether an address is an authorized issuer.
  • get_admin() — return the current admin address.
  • transfer_admin(current_admin, new_admin) — transfer contract administration rights.
  • create_attestation(issuer, subject, claim_type, expiration, metadata) — issuer creates a new attestation with optional expiration and metadata; returns a deterministic hash-based ID.
  • revoke_attestation(issuer, attestation_id) — issuer marks an attestation as revoked.
  • get_attestation(attestation_id) — fetch full attestation data by ID.
  • get_attestation_status(attestation_id) — return Valid, Expired, or Revoked; emits an expired event when status is Expired.
  • has_valid_claim(subject, claim_type) — returns true if the subject holds a non-expired, non-revoked attestation of the given type; emits an expired event for any expired attestation encountered.
  • has_valid_claim_from_issuer(subject, claim_type, issuer) — constrain verification to a specific issuer.
  • has_any_claim(subject, claim_types) and has_all_claims(subject, claim_types) — OR/AND claim verification across multiple claim types.
  • get_subject_attestations(subject, start, limit) — paginated list of attestation IDs for a subject.
  • get_issuer_attestations(issuer, start, limit) — paginated list of attestation IDs issued by an issuer.
  • get_subject_attestation_count(subject), get_issuer_attestation_count(issuer), and get_valid_claim_count(subject) — aggregate query helpers.
  • Claim type registry: register_claim_type, update_claim_type, remove_claim_type, get_claim_type_description, and list_claim_types.
  • Historical import support: import_attestation(admin, issuer, subject, claim_type, timestamp, expiration) and Attestation.imported.
  • Fee configuration: set_fee(admin, fee, collector, fee_token) and get_fee_config() with optional token-denominated attestation fees.
  • Bridge support: register_bridge, remove_bridge, is_bridge, and bridge_attestation with source-chain metadata.
  • Batch operations: create_attestations_batch and revoke_attestations_batch.
  • Expiration hooks: register_expiration_hook, get_expiration_hook, and remove_expiration_hook for callback notifications.
  • Multi-signature attestations: propose_attestation, cosign_attestation, and get_multisig_proposal.
  • Global and per-issuer statistics: get_global_stats, get_issuer_stats, and issuer tier/metadata management.
  • Comprehensive event set for creation, revocation, bridge/import, fee updates, claim-type administration, multi-sig lifecycle, and expiration hooks.
  • Integration examples under examples/ including KYC token and governance-gated voting patterns.

Fixed

  • Validation coverage for metadata, tag cardinality/length, and timestamp/expiration edge cases.
  • Deterministic storage/index consistency for issuer and subject attestation lookups.
  • Authorization checks across admin, issuer, bridge, and multisig signer flows.