21 lines
430 B
Solidity
21 lines
430 B
Solidity
|
pragma solidity >0.5.0;
|
||
|
|
|
||
|
|
contract Greeter {
|
||
|
|
string public greeting;
|
||
|
|
|
||
|
|
event ChangeGreeting(address from, string value);
|
||
|
|
|
||
|
|
constructor() public {
|
||
|
|
greeting = "Hello";
|
||
|
|
}
|
||
|
|
|
||
|
|
function setGreeting(string memory _greeting) public {
|
||
|
|
greeting = _greeting;
|
||
|
|
emit ChangeGreeting(msg.sender, _greeting);
|
||
|
|
}
|
||
|
|
|
||
|
|
function greet() public view returns (string memory) {
|
||
|
|
return greeting;
|
||
|
|
}
|
||
|
|
}
|