Transactions
Token Transfers
Tokens
Internal Transactions
Coin Balance History
Logs
Code
Read Contract
Write Contract
- Contract name:
- Swap
- Optimization enabled
- false
- Compiler version
- v0.8.7+commit.e28d00a7
- EVM Version
- default
- Verified at
- 2022-11-01T21:20:22.560441Z
Constructor Arguments
0x00000000000000000000000009a9e6d00b07f7c991b98575f75d16811c9c50a4
Arg [0] (address) : 0x09a9e6d00b07f7c991b98575f75d16811c9c50a4
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":"address","name":"token","internalType":"address"}]},{"type":"function","stateMutability":"payable","outputs":[],"name":"_SendEth","inputs":[{"type":"uint256","name":"amount","internalType":"uint256"}]},{"type":"function","stateMutability":"payable","outputs":[],"name":"buy","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"sell","inputs":[{"type":"uint256","name":"amount","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"withdrawToken","inputs":[{"type":"address","name":"_tokenContract","internalType":"address"},{"type":"uint256","name":"_amount","internalType":"uint256"}]},{"type":"event","name":"Bought","inputs":[{"type":"uint256","name":"amount","indexed":false}],"anonymous":false},{"type":"event","name":"Sold","inputs":[{"type":"uint256","name":"amount","indexed":false}],"anonymous":false},{"type":"receive"},{"type":"fallback"}]
Deployed ByteCode
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