29 lines
961 B
Solidity
29 lines
961 B
Solidity
// SPDX-License-Identifier: MIT
|
|
pragma solidity ^0.7.0;
|
|
|
|
import { IAMB } from "../interfaces/IBridge.sol";
|
|
|
|
/** @dev Special cross chain guard that can authorize caller as owner of this contract according to XDAI AMB bridge protocol.
|
|
* more info here https://docs.tokenbridge.net/amb-bridge/development-of-a-cross-chain-application/how-to-develop-xchain-apps-by-amb#receive-a-method-call-from-the-amb-bridge
|
|
*/
|
|
contract CrossChainGuard {
|
|
IAMB public immutable ambBridge;
|
|
bytes32 public immutable ownerChainId;
|
|
address public immutable owner;
|
|
|
|
constructor(
|
|
address _ambBridge,
|
|
uint256 _ownerChainId,
|
|
address _owner
|
|
) {
|
|
ambBridge = IAMB(_ambBridge);
|
|
owner = _owner;
|
|
ownerChainId = bytes32(uint256(_ownerChainId));
|
|
}
|
|
|
|
function isCalledByOwner() public virtual returns (bool) {
|
|
return
|
|
msg.sender == address(ambBridge) && ambBridge.messageSourceChainId() == ownerChainId && ambBridge.messageSender() == owner;
|
|
}
|
|
}
|