└── TransactionVerifier.sol


/TransactionVerifier.sol:
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 1 | pragma solidity ^0.8.0;
 2 | 
 3 | contract TransactionVerifier {
 4 |     mapping(address => uint256) public balances;
 5 | 
 6 |     function deposit() public payable {
 7 |         balances[msg.sender] += msg.value;
 8 |     }
 9 | 
10 |     function withdraw(uint256 amount) public {
11 |         require(balances[msg.sender] >= amount, "Insufficient balance");
12 |         payable(msg.sender).transfer(amount);
13 |         balances[msg.sender] -= amount;
14 |     }
15 | 
16 |     function verifyTransaction(address sender, uint256 amount) public view returns (bool) {
17 |         return balances[sender] >= amount;
18 |     }
19 | }
20 | 


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