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