๐งโโ๏ธSubscribing to Events
Example Contract
pragma solidity ^0.8.0;
contract HelloWorld_Bank{
address public owner;
string private message;
mapping (address => uint) private balances;
constructor () payable {
owner = msg.sender;
message = "Hello";
}
//Create Deposit Event
event DepositLog(address indexed sender, uint value, string message);
//Setting Up authorization
function isOwner () public view returns(bool) {
return msg.sender == owner;
}
modifier onlyOwner() {
require(isOwner());
_;
}
function changeMessage(string memory myMessage) public {
message = myMessage;
}
function deposit () public payable {
require((balances[msg.sender] + msg.value) >= balances[msg.sender]);
balances[msg.sender] += msg.value;
emit DepositLog(msg.sender, msg.value ,"Deposited Eth");
}
function withdraw (uint withdrawAmount) public {
require (withdrawAmount <= balances[msg.sender]);
balances[msg.sender] -= withdrawAmount;
payable(msg.sender).transfer(withdrawAmount);
}
function withdrawAll() public onlyOwner {
payable(msg.sender).transfer(address(this).balance);
}
function getBalance () public view returns (uint){
return balances[msg.sender];
}
}Python Code for Event Handling
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