39 lines
1.0 KiB
Solidity
39 lines
1.0 KiB
Solidity
// SPDX-License-Identifier: MIT
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pragma solidity 0.8.10;
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import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
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import "@openzeppelin/contracts/token/ERC20/extensions/ERC20Burnable.sol";
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import "@openzeppelin/contracts/access/AccessControl.sol";
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contract FT is ERC20, ERC20Burnable, AccessControl {
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bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE");
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uint256 public immutable supplyLimit;
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constructor(
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string memory name_,
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string memory symbol_,
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uint256 _supplyLimt
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) ERC20(name_, symbol_) {
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_setupRole(DEFAULT_ADMIN_ROLE, msg.sender);
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_setupRole(MINTER_ROLE, msg.sender);
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supplyLimit = _supplyLimt;
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}
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function mint(address to, uint256 amount) external onlyRole(MINTER_ROLE) {
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if (supplyLimit > 0) {
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require(
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(totalSupply() + amount) <= supplyLimit,
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"Exceed the total supply"
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);
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}
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_mint(to, amount);
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}
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function setMintRole(address to) external {
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grantRole(MINTER_ROLE, to);
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}
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function removeMintRole(address to) external {
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revokeRole(MINTER_ROLE, to);
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}
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}
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