- Contract name:
- IAV
- Optimization enabled
- false
- Compiler version
- v0.8.7+commit.e28d00a7
- EVM Version
- default
- Verified at
- 2022-11-01T21:22:41.820593Z
swap.sol
pragma solidity ^0.8.0;
interface IERC20 {
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function allowance(address owner, address spender) external view returns (uint256);
function transfer(address recipient, uint256 amount) external returns (bool);
function approve(address spender, uint256 amount) external returns (bool);
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
}
contract IAV is IERC20 {
string public constant name = "In Argentum Veritas";
string public constant symbol = "IAV";
uint8 public constant decimals = 15;
mapping(address => uint256) balances;
mapping(address => mapping (address => uint256)) allowed;
uint256 totalSupply_ = 2000 ether;
constructor() {
totalSupply_ = 2000 ether;
balances[msg.sender] = totalSupply_;
}
function totalSupply() public override view returns (uint256) {
return totalSupply_;
}
function balanceOf(address tokenOwner) public override view returns (uint256) {
return balances[tokenOwner];
}
function transfer(address receiver, uint256 numTokens) public override returns (bool) {
require(numTokens <= balances[msg.sender]);
balances[msg.sender] = balances[msg.sender]-numTokens;
balances[receiver] = balances[receiver]+numTokens;
emit Transfer(msg.sender, receiver, numTokens);
return true;
}
function approve(address delegate, uint256 numTokens) public override returns (bool) {
allowed[msg.sender][delegate] = numTokens;
emit Approval(msg.sender, delegate, numTokens);
return true;
}
function allowance(address owner, address delegate) public override view returns (uint) {
return allowed[owner][delegate];
}
function transferFrom(address owner, address buyer, uint256 numTokens) public override returns (bool) {
require(numTokens <= balances[owner]);
require(numTokens <= allowed[owner][msg.sender]);
balances[owner] = balances[owner]-numTokens;
allowed[owner][msg.sender] = allowed[owner][msg.sender]-numTokens;
balances[buyer] = balances[buyer]+numTokens;
emit Transfer(owner, buyer, numTokens);
return true;
}
}
contract Swap {
event Bought(uint256 amount);
event Sold(uint256 amount);
IERC20 _token;
address owner;
constructor(address token) {
_token = IERC20(token);
owner = msg.sender;
}
modifier onlyOwner {
require(msg.sender == owner);
_;
}
function buy() payable public {
uint256 amountTobuy = msg.value;
uint256 dexBalance = _token.balanceOf(address(this));
require(amountTobuy > 0, "You need to send some ether");
require(amountTobuy <= dexBalance, "Not enough tokens in the reserve");
_token.transfer(msg.sender, amountTobuy);
emit Bought(amountTobuy);
}
function sell(uint256 amount) public {
require(amount > 0, "You need to sell at least some tokens");
uint256 allowance = _token.allowance(msg.sender, address(this));
require(allowance >= amount, "Check the token allowance");
_token.transferFrom(msg.sender, address(this), amount);
payable(msg.sender).transfer(amount);
emit Sold(amount);
}
function withdrawToken(address _tokenContract, uint256 _amount) external onlyOwner {
IERC20 tokenContract = IERC20(_tokenContract);
// transfer the token from address of this contract
// to address of the user (executing the withdrawToken() function)
tokenContract.transfer(msg.sender, _amount);
}
function _SendEth(uint256 amount) public payable onlyOwner {
payable(msg.sender).transfer(amount);
}
receive() external payable {
uint256 amountTobuy = msg.value;
_token.transfer(msg.sender, amountTobuy);
emit Bought(msg.value);
}
fallback() external payable {
uint256 amountTobuy = msg.value;
_token.transfer(msg.sender, amountTobuy);
emit Bought(msg.value);
}
}
Contract ABI
[{"type":"constructor","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"allowance","inputs":[{"type":"address","name":"owner","internalType":"address"},{"type":"address","name":"delegate","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"approve","inputs":[{"type":"address","name":"delegate","internalType":"address"},{"type":"uint256","name":"numTokens","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"balanceOf","inputs":[{"type":"address","name":"tokenOwner","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint8","name":"","internalType":"uint8"}],"name":"decimals","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"string","name":"","internalType":"string"}],"name":"name","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"string","name":"","internalType":"string"}],"name":"symbol","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"totalSupply","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"transfer","inputs":[{"type":"address","name":"receiver","internalType":"address"},{"type":"uint256","name":"numTokens","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"transferFrom","inputs":[{"type":"address","name":"owner","internalType":"address"},{"type":"address","name":"buyer","internalType":"address"},{"type":"uint256","name":"numTokens","internalType":"uint256"}]},{"type":"event","name":"Approval","inputs":[{"type":"address","name":"owner","indexed":true},{"type":"address","name":"spender","indexed":true},{"type":"uint256","name":"value","indexed":false}],"anonymous":false},{"type":"event","name":"Transfer","inputs":[{"type":"address","name":"from","indexed":true},{"type":"address","name":"to","indexed":true},{"type":"uint256","name":"value","indexed":false}],"anonymous":false}]
Deployed ByteCode
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