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1.4 KiB
Solidity

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (crosschain/optimism/CrossChainEnabledOptimism.sol)
pragma solidity ^0.8.4;
import "../CrossChainEnabled.sol";
import "./LibOptimism.sol";
/**
* @dev https://www.optimism.io/[Optimism] specialization or the
* {CrossChainEnabled} abstraction.
*
* The messenger (`CrossDomainMessenger`) contract is provided and maintained by
* the optimism team. You can find the address of this contract on mainnet and
* kovan in the https://github.com/ethereum-optimism/optimism/tree/develop/packages/contracts/deployments[deployments section of Optimism monorepo].
*
* _Available since v4.6._
*/
abstract contract CrossChainEnabledOptimism is CrossChainEnabled {
/// @custom:oz-upgrades-unsafe-allow state-variable-immutable
address private immutable _messenger;
/// @custom:oz-upgrades-unsafe-allow constructor
constructor(address messenger) {
_messenger = messenger;
}
/**
* @dev see {CrossChainEnabled-_isCrossChain}
*/
function _isCrossChain() internal view virtual override returns (bool) {
return LibOptimism.isCrossChain(_messenger);
}
/**
* @dev see {CrossChainEnabled-_crossChainSender}
*/
function _crossChainSender() internal view virtual override onlyCrossChain returns (address) {
return LibOptimism.crossChainSender(_messenger);
}
}