EIP-7906은 새로운 EVM 옵코드를 통해 상태 변화(state diff)를 기반으로 트랜잭션 단언(assertion)을 가능하게 하는 Core Draft입니다. 이를 통해 컨트랙트가 자신의 실행 결과를 검증하고 예상치 못한 상태 변화 시 롤백할 수 있습니다.
Concept
EIP-7906 introduces an opcode that exposes a summary of state changes made so far in the current execution frame. Contracts can assert that the diff matches expected patterns before committing.
Use Cases
DeFi protocols that need to verify exact token balance changes, bridge contracts checking escrow state, and smart accounts enforcing spending policies all benefit from state diff assertions.
Technical Design
The opcode returns a hash or structured representation of the current state diff. Assertions are evaluated at EVM level, with revert triggered automatically if the assertion fails.
Status
The EIP is in Draft and the authors are working through edge cases around nested calls, storage slot access patterns, and the gas cost of computing the state diff summary.