You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
95 lines
2.9 KiB
Solidity
95 lines
2.9 KiB
Solidity
// SPDX-License-Identifier: MIT
|
|
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/presets/ERC20PresetMinterPauser.sol)
|
|
|
|
pragma solidity ^0.8.0;
|
|
|
|
import "../ERC20.sol";
|
|
import "../extensions/ERC20Burnable.sol";
|
|
import "../extensions/ERC20Pausable.sol";
|
|
import "../../../access/AccessControlEnumerable.sol";
|
|
import "../../../utils/Context.sol";
|
|
|
|
/**
|
|
* @dev {ERC20} token, including:
|
|
*
|
|
* - ability for holders to burn (destroy) their tokens
|
|
* - a minter role that allows for token minting (creation)
|
|
* - a pauser role that allows to stop all token transfers
|
|
*
|
|
* This contract uses {AccessControl} to lock permissioned functions using the
|
|
* different roles - head to its documentation for details.
|
|
*
|
|
* The account that deploys the contract will be granted the minter and pauser
|
|
* roles, as well as the default admin role, which will let it grant both minter
|
|
* and pauser roles to other accounts.
|
|
*
|
|
* _Deprecated in favor of https://wizard.openzeppelin.com/[Contracts Wizard]._
|
|
*/
|
|
contract ERC20PresetMinterPauser is Context, AccessControlEnumerable, ERC20Burnable, ERC20Pausable {
|
|
bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE");
|
|
bytes32 public constant PAUSER_ROLE = keccak256("PAUSER_ROLE");
|
|
|
|
/**
|
|
* @dev Grants `DEFAULT_ADMIN_ROLE`, `MINTER_ROLE` and `PAUSER_ROLE` to the
|
|
* account that deploys the contract.
|
|
*
|
|
* See {ERC20-constructor}.
|
|
*/
|
|
constructor(string memory name, string memory symbol) ERC20(name, symbol) {
|
|
_setupRole(DEFAULT_ADMIN_ROLE, _msgSender());
|
|
|
|
_setupRole(MINTER_ROLE, _msgSender());
|
|
_setupRole(PAUSER_ROLE, _msgSender());
|
|
}
|
|
|
|
/**
|
|
* @dev Creates `amount` new tokens for `to`.
|
|
*
|
|
* See {ERC20-_mint}.
|
|
*
|
|
* Requirements:
|
|
*
|
|
* - the caller must have the `MINTER_ROLE`.
|
|
*/
|
|
function mint(address to, uint256 amount) public virtual {
|
|
require(hasRole(MINTER_ROLE, _msgSender()), "ERC20PresetMinterPauser: must have minter role to mint");
|
|
_mint(to, amount);
|
|
}
|
|
|
|
/**
|
|
* @dev Pauses all token transfers.
|
|
*
|
|
* See {ERC20Pausable} and {Pausable-_pause}.
|
|
*
|
|
* Requirements:
|
|
*
|
|
* - the caller must have the `PAUSER_ROLE`.
|
|
*/
|
|
function pause() public virtual {
|
|
require(hasRole(PAUSER_ROLE, _msgSender()), "ERC20PresetMinterPauser: must have pauser role to pause");
|
|
_pause();
|
|
}
|
|
|
|
/**
|
|
* @dev Unpauses all token transfers.
|
|
*
|
|
* See {ERC20Pausable} and {Pausable-_unpause}.
|
|
*
|
|
* Requirements:
|
|
*
|
|
* - the caller must have the `PAUSER_ROLE`.
|
|
*/
|
|
function unpause() public virtual {
|
|
require(hasRole(PAUSER_ROLE, _msgSender()), "ERC20PresetMinterPauser: must have pauser role to unpause");
|
|
_unpause();
|
|
}
|
|
|
|
function _beforeTokenTransfer(
|
|
address from,
|
|
address to,
|
|
uint256 amount
|
|
) internal virtual override(ERC20, ERC20Pausable) {
|
|
super._beforeTokenTransfer(from, to, amount);
|
|
}
|
|
}
|