16 lines
401 B
Solidity
16 lines
401 B
Solidity
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pragma solidity >=0.4.24;
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contract SimpleStorage {
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event ValueChanged(address indexed author, address indexed oldAuthor, uint256 oldValue, uint256 newValue);
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address public lastSender;
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uint256 public value;
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function setValue(uint256 _value) public {
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emit ValueChanged(msg.sender, lastSender, value, _value);
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value = _value;
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lastSender = msg.sender;
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}
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}
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