101 lines
2.4 KiB
Solidity
101 lines
2.4 KiB
Solidity
pragma solidity >0.6.11;
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// SPDX-License-Identifier: GPL-3.0-or-later
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// File-Version: 1
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contract CustodialAccountIndex {
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uint256 public entryCount;
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mapping(address => uint256) entryIndex;
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mapping(address => bool) writers;
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address public owner;
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address newOwner;
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event AddressAdded(address indexed addedAccount, uint256 indexed accountIndex); // AccountsIndex
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event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); // EIP173
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constructor() public {
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owner = msg.sender;
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}
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function addWriter(address _writer) public returns (bool) {
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require(owner == msg.sender);
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writers[_writer] = true;
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return true;
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}
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function deleteWriter(address _writer) public returns (bool) {
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require(owner == msg.sender);
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delete writers[_writer];
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return true;
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}
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// Implements AccountsIndex
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function add(address _account) external returns (bool) {
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require(writers[msg.sender]);
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require(entryIndex[_account] == 0);
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entryIndex[_account] = block.timestamp;
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entryCount = entryCount + 1;
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emit AddressAdded(_account, block.timestamp);
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return true;
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}
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// Implements AccountsIndex
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function remove(address _account) external returns (bool) {
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require(writers[msg.sender]);
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require(entryIndex[_account] > 0);
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entryIndex[_account] = 0;
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entryCount = entryCount - 1;
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return true;
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}
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// Implements AccountsIndex
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function have(address _account) external view returns (bool) {
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return entryIndex[_account] > 0;
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}
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// Implements EIP173
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function transferOwnership(address _newOwner) public returns (bool) {
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require(msg.sender == owner);
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newOwner = _newOwner;
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}
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// Implements OwnedAccepter
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function acceptOwnership() public returns (bool) {
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address oldOwner;
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require(msg.sender == newOwner);
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oldOwner = owner;
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owner = newOwner;
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newOwner = address(0);
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emit OwnershipTransferred(oldOwner, owner);
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}
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// Implements EIP165
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function supportsInterface(bytes4 _sum) public pure returns (bool) {
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if (_sum == 0xcbdb05c7) { // AccountsIndex
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return true;
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}
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if (_sum == 0x01ffc9a7) { // EIP165
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return true;
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}
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if (_sum == 0x9493f8b2) { // EIP173
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return true;
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}
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if (_sum == 0x37a47be4) { // OwnedAccepter
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return true;
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}
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if (_sum == 0x80c84bd6) { // Writer
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return true;
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}
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return false;
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}
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function isRemoved(address _account) external view returns (bool){
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if (entryIndex[_account] == 0) {
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return true;
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}
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return false;
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}
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}
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