37 lines
1.4 KiB
Solidity
37 lines
1.4 KiB
Solidity
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// contracts/BridgeShutdown.sol
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// SPDX-License-Identifier: Apache 2
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pragma solidity ^0.8.0;
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import "./BridgeGovernance.sol";
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import "@openzeppelin/contracts/security/ReentrancyGuard.sol";
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import "@openzeppelin/contracts/proxy/ERC1967/ERC1967Upgrade.sol";
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/**
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* @title BridgeShutdown
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* @notice This contract implements a stripped-down version of the token bridge
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* asset transfer protocol that is a drop-in replacement for the Bridge
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* implementation contract, effectively disabling all non-governance
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* functionality.
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* In particular, sending and receiving assets is disabled, but the
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* contract remains upgradeable through governance.
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* @dev Technically the ReentrancyGuard is not used in this contract,
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* but it adds a storage variable, so as a matter of principle, we
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* inherit that here too in order keep the storage layout identical to
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* the actual implementation contract (which does use the reentrancy
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* guard).
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*/
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contract BridgeShutdown is BridgeGovernance, ReentrancyGuard {
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function initialize() public {
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address implementation = ERC1967Upgrade._getImplementation();
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setInitialized(implementation);
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// this function needs to be exposed for an upgrade to pass
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// NOTE: leave this function empty! It specifically does not have an
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// 'initializer' modifier, to allow this contract to be upgraded to
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// multiple times.
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}
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}
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