93 lines
2.6 KiB
Solidity
93 lines
2.6 KiB
Solidity
// SPDX-License-Identifier: MIT
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pragma solidity ^0.8.0;
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import "@openzeppelin/contracts-upgradeable/token/ERC20/ERC20Upgradeable.sol";
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import "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
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import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol";
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import "@openzeppelin/contracts-upgradeable/proxy/utils/UUPSUpgradeable.sol";
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/**
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* @title USDY Token
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* @notice 统一计价代币
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* @dev 只有授权的Vault可以铸造和销毁，UUPS可升级合约
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*/
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contract USDY is Initializable, ERC20Upgradeable, OwnableUpgradeable, UUPSUpgradeable {
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/// @custom:oz-upgrades-unsafe-allow constructor
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constructor() {
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_disableInitializers();
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}
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error Forbidden();
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error InvalidVault();
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mapping(address => bool) public vaults;
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event VaultAdded(address indexed vault);
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event VaultRemoved(address indexed vault);
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modifier onlyVault() {
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if (!vaults[msg.sender]) revert Forbidden();
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_;
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}
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/**
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* @notice 初始化合约
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*/
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function initialize() external initializer {
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__ERC20_init("YT USD", "USDY");
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__Ownable_init(msg.sender);
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__UUPSUpgradeable_init();
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}
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/**
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* @notice 授权升级（仅owner可调用）
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* @param newImplementation 新实现合约地址
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*/
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function _authorizeUpgrade(address newImplementation) internal override onlyOwner {}
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/**
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* @notice 添加授权的Vault地址
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* @param _vault Vault合约地址
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*/
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function addVault(address _vault) external onlyOwner {
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if (_vault == address(0)) revert InvalidVault();
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vaults[_vault] = true;
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emit VaultAdded(_vault);
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}
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/**
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* @notice 移除授权的Vault地址
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* @param _vault Vault合约地址
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*/
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function removeVault(address _vault) external onlyOwner {
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vaults[_vault] = false;
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emit VaultRemoved(_vault);
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}
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/**
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* @notice 铸造USDY代币
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* @param _account 接收地址
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* @param _amount 铸造数量
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*/
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function mint(address _account, uint256 _amount) external onlyVault {
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_mint(_account, _amount);
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}
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/**
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* @notice 销毁USDY代币
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* @param _account 销毁地址
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* @param _amount 销毁数量
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*/
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function burn(address _account, uint256 _amount) external onlyVault {
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_burn(_account, _amount);
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}
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/**
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* @dev 预留存储空间，用于未来升级时添加新的状态变量
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* 50个slot = 50 * 32 bytes = 1600 bytes
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*/
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uint256[50] private __gap;
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}
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