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Add files via upload #7

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23 changes: 23 additions & 0 deletions GreeterBase.sol
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Original file line number Diff line number Diff line change
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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

contract GreeterBase {
string private _greeting;

event GreetingChanged(string oldGreeting, string newGreeting);

constructor(string memory initialGreeting) {
_greeting = initialGreeting;
emit GreetingChanged("", initialGreeting);
}

function greet() external view returns (string memory) {
return _greeting;
}

function setGreeting(string calldata newGreeting) external {
string memory old = _greeting;
_greeting = newGreeting;
emit GreetingChanged(old, newGreeting);
}
}