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40 lines
1.4 KiB
40 lines
1.4 KiB
pragma solidity ^0.5.0;
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import "./IRelayRecipient.sol";
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import "./GSNContext.sol";
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import "./bouncers/GSNBouncerBase.sol";
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import "./IRelayHub.sol";
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/**
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* @dev Base GSN recipient contract: includes the {IRelayRecipient} interface and enables GSN support on all contracts
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* in the inheritance tree.
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*
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* Not all interface methods are implemented (e.g. {acceptRelayedCall}, derived contracts must provide one themselves.
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*/
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contract GSNRecipient is IRelayRecipient, GSNContext, GSNBouncerBase {
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/**
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* @dev Returns the `RelayHub` address for this recipient contract.
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*/
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function getHubAddr() public view returns (address) {
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return _relayHub;
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}
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/**
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* @dev Returns the version string of the `RelayHub` for which this recipient implementation was built.
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*/
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// This function is view for future-proofing, it may require reading from
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// storage in the future.
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function relayHubVersion() public view returns (string memory) {
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this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
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return "1.0.0";
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}
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/**
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* @dev Withdraws the recipient's deposits in `RelayHub`.
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*
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* Derived contracts should expose this in an external interface with proper access control.
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*/
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function _withdrawDeposits(uint256 amount, address payable payee) internal {
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IRelayHub(_relayHub).withdraw(amount, payee);
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}
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}
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