a7e91856f3
* Update to ganache-cli v6.1.0 and truffle v4.1.0 * Update to stable version of ganache-cli * fix: update event emission warning - Fix event emission warnings for solidity 4.21 after truffle has been updated to use this version * fix pr review comments * update to truffle v4.1.5 * update package-lock * add additional emit keywords * update solidity-coverage to 0.4.15 * update to solium 1.1.6 * fix MerkleProof coverage analysis by testing through wrapper * change version pragma to ^0.4.21 * fix solium linting errors
30 lines
824 B
Solidity
30 lines
824 B
Solidity
pragma solidity ^0.4.21;
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import "./BasicToken.sol";
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/**
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* @title Burnable Token
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* @dev Token that can be irreversibly burned (destroyed).
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*/
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contract BurnableToken is BasicToken {
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event Burn(address indexed burner, uint256 value);
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/**
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* @dev Burns a specific amount of tokens.
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* @param _value The amount of token to be burned.
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*/
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function burn(uint256 _value) public {
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require(_value <= balances[msg.sender]);
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// no need to require value <= totalSupply, since that would imply the
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// sender's balance is greater than the totalSupply, which *should* be an assertion failure
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address burner = msg.sender;
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balances[burner] = balances[burner].sub(_value);
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totalSupply_ = totalSupply_.sub(_value);
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emit Burn(burner, _value);
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emit Transfer(burner, address(0), _value);
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}
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}
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