40 lines
1.2 KiB
Solidity
40 lines
1.2 KiB
Solidity
// SPDX-License-Identifier: MIT
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// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/ERC20Burnable.sol)
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pragma solidity ^0.8.20;
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import {ERC20} from "../ERC20.sol";
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import {Context} from "../../../utils/Context.sol";
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/**
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* @dev Extension of {ERC20} that allows token holders to destroy both their own
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* tokens and those that they have an allowance for, in a way that can be
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* recognized off-chain (via event analysis).
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*/
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abstract contract ERC20Burnable is Context, ERC20 {
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/**
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* @dev Destroys a `value` amount of tokens from the caller.
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*
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* See {ERC20-_burn}.
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*/
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function burn(uint256 value) public virtual {
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_burn(_msgSender(), value);
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}
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/**
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* @dev Destroys a `value` amount of tokens from `account`, deducting from
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* the caller's allowance.
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*
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* See {ERC20-_burn} and {ERC20-allowance}.
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*
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* Requirements:
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*
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* - the caller must have allowance for ``accounts``'s tokens of at least
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* `value`.
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*/
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function burnFrom(address account, uint256 value) public virtual {
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_spendAllowance(account, _msgSender(), value);
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_burn(account, value);
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}
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}
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