Retries

[saucepoint]

Allow for messages to be retried with alternative bridges

• retryable by anyone, using the same calldata
• original torcher's calldata is hashed and saved into storage

[saucepoint]

  function retry(uint256 bridgeId, uint256 _nonce, Currency[] memory assets, address claimer, uint32 l2GasLimit)
    external
  {
    bytes32 calldataHash = keccak256(abi.encode(assets, claimer));
    require(sentMessages[_nonce] == calldataHash, "Invalid nonce or calldata");
    
    _sendReleaseMessage(bridgeId, _nonce, assets, claimer, abi.encode(l2GasLimit));
  }