BT 3

 

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

 

contract Bank {

    // Mapping of each user's address to their account balance

    mapping(address => uint) public balances;

 

    // Deposit Ether into your account

    function deposit() public payable {

        balances[msg.sender] += msg.value;

    }

 

    // Withdraw specified Ether amount from your account

    function withdraw(uint _amount) public {

        require(balances[msg.sender] >= _amount, "Insufficient balance");

        balances[msg.sender] -= _amount;

 

        // Transfer the Ether back to the sender

        (bool sent, ) = msg.sender.call{value: _amount}("");

        require(sent, "Transaction failed");

    }

 

    // Get the total Ether balance stored in the contract

    function getContractBalance() public view returns (uint) {

        return address(this).balance;

    }

    // Get your personal account balance

    function getMyBalance() public view returns (uint) {

        return balances[msg.sender];

    }

}

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