implementations#112
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mplementation Summary
Upgrade Pattern Design
Implemented a comprehensive upgrade architecture with proxy pattern support
Added version tracking system with migration registry
Designed backward-compatible legacy upgrade method
Proxy Pattern Implementation
Added initialize_upgrade() function to set up proxy with admin and implementation
Implemented get_implementation() to retrieve current proxy implementation
Proxy implementation tracking for seamless contract upgrades
Data Migration
Enhanced migration registry with MigrationRecord structure tracking version, timestamp, and success status
Added is_migration_executed() to check specific migration completion
Maintained backward compatibility with existing run_migration_v2()
State Consistency
Implemented validate_state_consistency() to verify critical storage keys before upgrades
Added update_state_hash() and get_state_hash() for state integrity verification
State consistency checks enforced before upgrade execution
Security Measures
Timelock mechanism: 24-hour delay between scheduling and executing upgrades
Access controls: Admin-only functions with require_admin() validation
Version validation: Prevents downgrades and invalid version jumps
Emergency pause: emergency_pause_upgrades() and unpause_upgrades() for critical situations
WASM hash validation: Rejects zero/invalid hashes
Dual authorization: Admin transfer requires both current and new admin signatures
Test Coverage
95 tests passing, covering all upgrade functionality
Tests for timelock mechanism, proxy pattern, migration registry, state consistency, and security measures
Integration tests verifying identity data survives upgrades
All files modified:
errors.rs - Added upgrade-specific error types
upgrade.rs - Complete rewrite with comprehensive upgrade mechanism
identity_registry.rs - Exposed new upgrade functions
upgrade_tests.rs - Added comprehensive test suite
Closes #101