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//SPDX-License-Identifier: MIT | |
pragma solidity 0.8.3; | |
contract FunctionsExample { | |
mapping(address => uint) public balanceReceived; | |
address payable owner; | |
constructor() { | |
owner = payable(msg.sender); | |
} | |
function destroySmartContract() public { | |
require(msg.sender == owner, "You are not the owner"); | |
selfdestruct(owner); | |
} | |
function getOwner() public view returns(address) { | |
return owner; | |
} | |
function convertWeiToEth(uint _amount) public pure returns(uint) { | |
return _amount / 1 ether; | |
} | |
function receiveMoney() public payable { | |
assert(balanceReceived[msg.sender] + msg.value >= balanceReceived[msg.sender]); | |
balanceReceived[msg.sender] += msg.value; | |
} | |
function withdrawMoney(address payable _to, uint _amount) public { | |
require(_amount <= balanceReceived[msg.sender], "not enough funds."); | |
assert(balanceReceived[msg.sender] >= balanceReceived[msg.sender] - _amount); | |
balanceReceived[msg.sender] -= _amount; | |
_to.transfer(_amount); | |
} | |
receive() external payable { | |
receiveMoney(); | |
} | |
} |
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