Skip to main content

TimestampBefore Enforcer

The TimestampBeforeEnforcer.sol smart contract adds the ability to caveat before timestamp.

Deployments​

  • Mainnet: Coming Soon
  • Polygon: Coming Soon
  • Optimism: Coming Soon

How It Works

The terms field is expected to contain the timestamp, after which invocations will not be valid. The timestamp is passed as a bytes8.

Javascript Example​

const delegation = {
  delegate: '0xd8da6bf26964af9d7eed9e03e53415d37aa96045', // vitalik.eth
  authority:
    '0x0000000000000000000000000000000000000000000000000000000000000000',
  caveats: [
    {
      enforcer: TimestampBeforeEnforcer.address,
      // Transaction must be executed after timestamp 0x00000007915eda10, which is 32503683600 in unix epoch timestamp
      // (Wednesday, January 1, 3000 1:00:00 AM).
      terms: '0x00000007915eda10',
    },
  ],
};

Smart Contract​

contract TimestampBeforeEnforcer is CaveatEnforcer {
    /**
     * @notice Allows the delegator to specify the latest timestamp the delegation will be valid.
     * @param terms - The latest timestamp this delegation is valid.
     * @param transaction - The transaction the delegate might try to perform.
     * @param delegationHash - The hash of the delegation being operated on.
     **/
    function enforceCaveat(
        bytes calldata terms,
        Transaction calldata transaction,
        bytes32 delegationHash
    ) public override returns (bool) {
        uint64 timestampThreshold = BytesLib.toUint64(terms, 0);
        if (timestampThreshold > block.timestamp) {
            return true;
        } else {
            revert("TimestampBeforeEnforcer:expired-delegation");
        }

    }
}