forked from DecentralizedClimateFoundation/DCIPs
58 lines
2.3 KiB
Solidity
58 lines
2.3 KiB
Solidity
// SPDX-License-Identifier: CC0-1.0
|
|
|
|
pragma solidity ^0.8.0;
|
|
|
|
import "@openzeppelin/contracts/utils/introspection/ERC165.sol";
|
|
|
|
import "./IERC4671Store.sol";
|
|
|
|
contract ERC4671Store is IERC4671Store, ERC165 {
|
|
// Mapping from owner to IERC4671Enumerable contracts
|
|
mapping(address => address[]) private _records;
|
|
|
|
// Mapping from owner to IERC4671Enumerable contract index
|
|
mapping(address => mapping(address => uint256)) _indices;
|
|
|
|
/// @notice Add a IERC4671Enumerable contract address to the caller's record
|
|
/// @param token Address of the IERC4671Enumerable contract to add
|
|
function add(address token) public virtual override {
|
|
address[] storage contracts = _records[msg.sender];
|
|
_indices[msg.sender][token] = contracts.length;
|
|
contracts.push(token);
|
|
emit Added(msg.sender, token);
|
|
}
|
|
|
|
/// @notice Remove a IERC4671Enumerable contract from the caller's record
|
|
/// @param token Address of the IERC4671Enumerable contract to remove
|
|
function remove(address token) public virtual override {
|
|
uint256 index = _indexOfTokenOrRevert(msg.sender, token);
|
|
address[] storage contracts = _records[msg.sender];
|
|
if (index == contracts.length - 1) {
|
|
_indices[msg.sender][token] = 0;
|
|
} else {
|
|
_indices[msg.sender][contracts[contracts.length - 1]] = index;
|
|
}
|
|
contracts[index] = contracts[contracts.length - 1];
|
|
contracts.pop();
|
|
emit Removed(msg.sender, token);
|
|
}
|
|
|
|
/// @notice Get all the IERC4671Enumerable contracts for a given owner
|
|
/// @param owner Address for which to retrieve the IERC4671Enumerable contracts
|
|
function get(address owner) public view virtual override returns (address[] memory) {
|
|
return _records[owner];
|
|
}
|
|
|
|
function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
|
|
return
|
|
interfaceId == type(IERC4671Store).interfaceId ||
|
|
super.supportsInterface(interfaceId);
|
|
}
|
|
|
|
function _indexOfTokenOrRevert(address owner, address token) private view returns (uint256) {
|
|
uint256 index = _indices[owner][token];
|
|
require(index > 0 || _records[owner].length > 0, "Address not found");
|
|
return index;
|
|
}
|
|
}
|