mirror of
https://github.com/tornadocash/tornado-nova
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29 lines
961 B
Solidity
29 lines
961 B
Solidity
// SPDX-License-Identifier: MIT
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pragma solidity ^0.7.0;
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import { IAMB } from "../interfaces/IBridge.sol";
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/** @dev Special cross chain guard that can authorize caller as owner of this contract according to XDAI AMB bridge protocol.
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* 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
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*/
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contract CrossChainGuard {
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IAMB public immutable ambBridge;
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bytes32 public immutable ownerChainId;
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address public immutable owner;
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constructor(
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address _ambBridge,
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uint256 _ownerChainId,
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address _owner
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) {
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ambBridge = IAMB(_ambBridge);
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owner = _owner;
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ownerChainId = bytes32(uint256(_ownerChainId));
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}
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function isCalledByOwner() public virtual returns (bool) {
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return
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msg.sender == address(ambBridge) && ambBridge.messageSourceChainId() == ownerChainId && ambBridge.messageSender() == owner;
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}
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}
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