forked from DecentralizedClimateFoundation/DCIPs
98 lines
4.0 KiB
Solidity
98 lines
4.0 KiB
Solidity
// SPDX-License-Identifier: CC0-1.0
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// EPSProxy Contracts v1.7.0 (epsproxy/contracts/Proxiable.sol)
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pragma solidity ^0.8.9;
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import "@openzeppelin/contracts/utils/Context.sol";
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import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
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import "@openzeppelin/contracts/token/ERC721/IERC721.sol";
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import "@epsproxy/contracts/EPS.sol";
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/**
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* @dev Contract module which allows children to implement calls to the EPS
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* proxy registry
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*/
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abstract contract Proxiable is Context {
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EPS eps; // Address for the relevant chain passed in on the constructor.
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/**
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* @dev Constructor initialises the register contract object
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*/
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constructor(
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address _epsRegisterAddress
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) {
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eps = EPS(_epsRegisterAddress);
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}
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/**
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* @dev Returns the proxied address details (nominator and delivery address) for a passed proxy address
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*/
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function getAddresses(address _receivedAddress) internal view returns (address nominator, address delivery, bool isProxied) {
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return (eps.getAddresses(_receivedAddress));
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}
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/**
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* @dev Returns true if this is currently a proxy address (i.e. has an entry that isn't expired):
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*/
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function proxyRecordExists(address _receivedAddress) internal view returns (bool isProxied) {
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return (eps.proxyRecordExists(_receivedAddress));
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}
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/**
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* @dev Returns an ERC20 token balance for the nominator, if a proxy record exists, or for the address
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* passed in if no proxy record exists.
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*/
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function ERC20BalanceOfNominator(address _receivedAddress, address tokenContract) internal virtual view returns (uint256 _tokenBalance){
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address nominator;
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address delivery;
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bool isProxied;
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(nominator, delivery, isProxied) = getAddresses(_receivedAddress);
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return IERC20(tokenContract).balanceOf(nominator);
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}
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/**
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* @dev Returns an ERC20 token balance for the nominator, if a proxy record exists, or for the address
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* passed in if no proxy record exists, IF we have been passed a bool indicating
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* that a proxied address is in use. This function should be used in conjunction with an off-chain call
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* to proxyRecordExists that determines if a proxy address is in use, which is then passed in on the call
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* to the contract inheriting this method. This saves gas for anyone who is NOT using a proxy as we do not needlessly check for proxy details.
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*/
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function ERC20BalanceOfNominatorSwitched(address _receivedAddress, address _tokenContract, bool _isProxied) internal virtual view returns (uint256 _tokenBalance){
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if (_isProxied) {
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return ERC20BalanceOfNominator(_receivedAddress, _tokenContract);
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}
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else {
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return IERC20(_tokenContract).balanceOf(_receivedAddress);
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}
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}
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/**
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* @dev Returns an ERC721 token balance for the nominator, if a proxy record exists, or for the address
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* passed in if no proxy record exists.
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*/
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function ERC721BalanceOfNominator(address _proxy, address tokenContract) internal virtual view returns (uint256 _tokenBalance){
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address nominator;
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address delivery;
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bool isProxied;
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(nominator, delivery, isProxied) = getAddresses(_proxy);
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return IERC721(tokenContract).balanceOf(nominator);
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}
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/**
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* @dev Returns an ERC721 token balance for the nominator, if a proxy record exists, or for the address
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* passed in if no proxy record exists, IF we have been passed a bool indicating
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* that a proxied address is in use. This function should be used in conjunction with an off-chain call
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* to proxyRecordExists that determines if a proxy address is in use, which is then passed in on the call
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* to the contract inheriting this method . This saves gas for anyone who is NOT using a proxy as we do not needlessly check for proxy details.
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*/
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function ERC721BalanceOfNominatorSwitched(address _receivedAddress, address _tokenContract, bool _isProxied) internal virtual view returns (uint256 _tokenBalance){
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if (_isProxied) {
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return ERC721BalanceOfNominator(_receivedAddress, _tokenContract);
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}
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else {
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return IERC721(_tokenContract).balanceOf(_receivedAddress);
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}
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}
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} |