40 lines
1.4 KiB
Solidity
40 lines
1.4 KiB
Solidity
// SPDX-License-Identifier: MIT
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// OpenZeppelin Contracts v4.4.1 (utils/escrow/ConditionalEscrow.sol)
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pragma solidity ^0.8.0;
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import "./EscrowUpgradeable.sol";
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import "../../proxy/utils/Initializable.sol";
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/**
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* @title ConditionalEscrow
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* @dev Base abstract escrow to only allow withdrawal if a condition is met.
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* @dev Intended usage: See {Escrow}. Same usage guidelines apply here.
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*/
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abstract contract ConditionalEscrowUpgradeable is Initializable, EscrowUpgradeable {
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function __ConditionalEscrow_init() internal onlyInitializing {
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__Ownable_init_unchained();
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}
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function __ConditionalEscrow_init_unchained() internal onlyInitializing {
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}
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/**
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* @dev Returns whether an address is allowed to withdraw their funds. To be
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* implemented by derived contracts.
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* @param payee The destination address of the funds.
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*/
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function withdrawalAllowed(address payee) public view virtual returns (bool);
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function withdraw(address payable payee) public virtual override {
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require(withdrawalAllowed(payee), "ConditionalEscrow: payee is not allowed to withdraw");
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super.withdraw(payee);
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}
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/**
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* This empty reserved space is put in place to allow future versions to add new
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* variables without shifting down storage in the inheritance chain.
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* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
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*/
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uint256[50] private __gap;
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}
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