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50 lines
1.9 KiB
Solidity

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