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50 lines
1.9 KiB
Solidity
50 lines
1.9 KiB
Solidity
1 year ago
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// SPDX-License-Identifier: MIT
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// OpenZeppelin Contracts (last updated v4.7.0) (crosschain/amb/CrossChainEnabledAMB.sol)
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pragma solidity ^0.8.4;
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import "../CrossChainEnabled.sol";
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import "./LibAMB.sol";
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/**
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* @dev https://docs.tokenbridge.net/amb-bridge/about-amb-bridge[AMB]
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* specialization or the {CrossChainEnabled} abstraction.
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*
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* As of february 2020, AMB bridges are available between the following chains:
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*
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* - https://docs.tokenbridge.net/eth-xdai-amb-bridge/about-the-eth-xdai-amb[ETH ⇌ xDai]
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* - https://docs.tokenbridge.net/eth-qdai-bridge/about-the-eth-qdai-amb[ETH ⇌ qDai]
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* - https://docs.tokenbridge.net/eth-etc-amb-bridge/about-the-eth-etc-amb[ETH ⇌ ETC]
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* - https://docs.tokenbridge.net/eth-bsc-amb/about-the-eth-bsc-amb[ETH ⇌ BSC]
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* - https://docs.tokenbridge.net/eth-poa-amb-bridge/about-the-eth-poa-amb[ETH ⇌ POA]
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* - https://docs.tokenbridge.net/bsc-xdai-amb/about-the-bsc-xdai-amb[BSC ⇌ xDai]
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* - https://docs.tokenbridge.net/poa-xdai-amb/about-the-poa-xdai-amb[POA ⇌ xDai]
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* - https://docs.tokenbridge.net/rinkeby-xdai-amb-bridge/about-the-rinkeby-xdai-amb[Rinkeby ⇌ xDai]
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* - https://docs.tokenbridge.net/kovan-sokol-amb-bridge/about-the-kovan-sokol-amb[Kovan ⇌ Sokol]
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*
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* _Available since v4.6._
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*/
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contract CrossChainEnabledAMB is CrossChainEnabled {
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/// @custom:oz-upgrades-unsafe-allow state-variable-immutable
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address private immutable _bridge;
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/// @custom:oz-upgrades-unsafe-allow constructor
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constructor(address bridge) {
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_bridge = bridge;
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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 LibAMB.isCrossChain(_bridge);
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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 LibAMB.crossChainSender(_bridge);
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}
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}
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