| |
| pragma solidity ^0.8.20; |
|
|
| import {ERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol"; |
|
|
| contract ControlledToken is ERC20 { |
| address public immutable issuer; |
| bool private _paused; |
| mapping(address => bool) private _blocked; |
|
|
| constructor(uint256 supply) ERC20("USD Coin", "USDC") { |
| issuer = msg.sender; |
| _mint(msg.sender, supply); |
| } |
|
|
| function decimals() public pure override returns (uint8) { |
| return 6; |
| } |
|
|
| function paused() external view returns (bool) { |
| return _paused; |
| } |
|
|
| function blocked(address account) external view returns (bool) { |
| return _blocked[account]; |
| } |
|
|
| function setPaused(bool value) external { |
| require(msg.sender == issuer, "only issuer"); |
| _paused = value; |
| } |
|
|
| function setBlocked(address account, bool value) external { |
| require(msg.sender == issuer, "only issuer"); |
| _blocked[account] = value; |
| } |
|
|
| function _update(address from, address to, uint256 value) internal override { |
| require(!_paused, "token is paused"); |
| require(!_blocked[from] && !_blocked[to], "account is blocked"); |
| super._update(from, to, value); |
| } |
| } |
|
|
