Created
August 16, 2021 21:17
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Ether bank mini project..
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| pragma solidity 0.8.1; | |
| contract Bank { | |
| mapping(address => uint) balance; | |
| function addBalance(uint _toAdd) public returns (uint) { | |
| balance[msg.sender] += _toAdd; | |
| return balance[msg.sender]; | |
| } | |
| function getBalance () public view returns (uint ){ | |
| return balance[msg.sender]; | |
| } | |
| function transfer ( address recipient, uint amount) public { | |
| require (balance[msg.sender] >= amount, "balance not sufficient!"); | |
| require (msg.sender != recipient, "Don't tranfer money to yourself!"); | |
| _transfer(msg.sender, recipient, amount); | |
| assert(balance[msg.sender] == previousSenderBalance - amount); | |
| //event logs and further checks. | |
| // balance[msg.sender] -= amount; | |
| // balance[recpient] += amount; | |
| } | |
| function _transfer(address from, address to, uint amount) private { | |
| balance[from] -= amount; | |
| balance[to] += amount; | |
| } | |
| } |
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