Warning! Contract bytecode has been changed and doesn't match the verified one. Therefore, interaction with this smart contract may be risky.
This contract has been verified via Sourcify.
View contract in Sourcify repository
- Contract name:
- SwapsFactory
- Optimization enabled
- true
- Compiler version
- v0.8.14+commit.80d49f37
- Optimization runs
- 200
- EVM Version
- london
- Verified at
- 2026-03-27T18:12:30.599326Z
Constructor Arguments
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Arg [0] (address) : 0x600080fd5b50604080518082018252600e81526d
SwapsFactory.sol
// SPDX-License-Identifier: BCOM
pragma solidity =0.8.14;
import "./ISwapsPair.sol";
import "./SwapsPair.sol";
contract SwapsFactory {
address public feeTo;
address public feeToSetter;
address public immutable cloneTarget;
address constant ZERO_ADDRESS = address(0);
address[] public allPairs;
mapping(address => mapping(address => address)) public getPair;
event PairCreated(
address indexed token0,
address indexed token1,
address pair,
uint256
);
constructor(
address _feeToSetter
) {
if (_feeToSetter == ZERO_ADDRESS) {
revert("SwapsFactory: INVALID_INPUT");
}
feeToSetter = _feeToSetter;
feeTo = _feeToSetter;
bytes32 salt;
address pair;
bytes memory bytecode = type(SwapsPair).creationCode;
assembly {
pair := create2(
0,
add(bytecode, 32),
mload(bytecode),
salt
)
}
cloneTarget = pair;
}
function allPairsLength()
external
view
returns (uint256)
{
return allPairs.length;
}
function createPair(
address _tokenA,
address _tokenB
)
external
returns (address pair)
{
require(
_tokenA != _tokenB,
"SwapsFactory: IDENTICAL"
);
(address token0, address token1) = _tokenA < _tokenB
? (_tokenA, _tokenB)
: (_tokenB, _tokenA);
require(
token0 != ZERO_ADDRESS,
"SwapsFactory: ZERO_ADDRESS"
);
require(
getPair[token0][token1] == ZERO_ADDRESS,
"SwapsFactory: PAIR_ALREADY_EXISTS"
);
bytes32 salt = keccak256(
abi.encodePacked(
token0,
token1
)
);
bytes20 targetBytes = bytes20(
cloneTarget
);
assembly {
let clone := mload(0x40)
mstore(
clone,
0x3d602d80600a3d3981f3363d3d373d3d3d363d73000000000000000000000000
)
mstore(
add(clone, 0x14),
targetBytes
)
mstore(
add(clone, 0x28),
0x5af43d82803e903d91602b57fd5bf30000000000000000000000000000000000
)
pair := create2(0, clone, 0x37, salt)
}
ISwapsPair(pair).initialize(
token0,
token1
);
getPair[token0][token1] = pair;
getPair[token1][token0] = pair;
allPairs.push(pair);
emit PairCreated(
token0,
token1,
pair,
allPairs.length
);
}
function setFeeTo(
address _feeTo
)
external
{
require(
msg.sender == feeToSetter,
"SwapsFactory: FORBIDDEN"
);
require(
_feeTo != ZERO_ADDRESS,
'SwapsFactory: ZERO_ADDRESS'
);
feeTo = _feeTo;
}
function setFeeToSetter(
address _feeToSetter
)
external
{
require(
msg.sender == feeToSetter,
"SwapsFactory: FORBIDDEN"
);
require(
_feeToSetter != ZERO_ADDRESS,
'SwapsFactory: ZERO_ADDRESS'
);
feeToSetter = _feeToSetter;
}
}
contract FactoryCodeCheck {
function factoryCodeHash()
external
pure
returns (bytes32)
{
return keccak256(
type(SwapsFactory).creationCode
);
}
function pairCodeHash()
external
pure
returns (bytes32)
{
return keccak256(
type(SwapsPair).creationCode
);
}
}
/ISwapsFactory.sol
// SPDX-License-Identifier: BCOM
pragma solidity =0.8.14;
interface ISwapsFactory {
function feeTo()
external
view
returns (address);
function feeToSetter()
external
view
returns (address);
function getPair(
address _tokenA,
address _tokenB
)
external
view
returns (address pair);
function allPairs(uint256)
external
view
returns (address pair);
function allPairsLength()
external
view
returns (uint256);
function createPair(
address _tokenA,
address _tokenB
)
external
returns (address pair);
function setFeeTo(
address
)
external;
function setFeeToSetter(
address
)
external;
function cloneTarget()
external
view
returns (address target);
}
/ISwapsCallee.sol
// SPDX-License-Identifier: BCOM
pragma solidity =0.8.14;
interface ISwapsCallee {
function swapsCall(
address _sender,
uint256 _amount0,
uint256 _amount1,
bytes calldata _data
)
external;
}
/ISwapsERC20.sol
// SPDX-License-Identifier: BCOM
pragma solidity =0.8.14;
interface ISwapsERC20 {
function name()
external
pure
returns (string memory);
function symbol()
external
pure
returns (string memory);
function decimals()
external
pure
returns (uint8);
function totalSupply()
external
view
returns (uint256);
function balanceOf(
address _owner
)
external
view
returns (uint256);
function allowance(
address _owner,
address _spender
)
external
view
returns (uint256);
function approve(
address _spender,
uint256 _value
)
external
returns (bool);
function transfer(
address _to,
uint256 _value
)
external
returns (bool);
function transferFrom(
address _from,
address _to,
uint256 _value
)
external
returns (bool);
function DOMAIN_SEPARATOR()
external
view
returns (bytes32);
function PERMIT_TYPEHASH()
external
pure
returns (bytes32);
function nonces(
address _owner
)
external
view
returns (uint256);
function permit(
address _owner,
address _spender,
uint256 _value,
uint256 _deadline,
uint8 _v,
bytes32 _r,
bytes32 _s
)
external;
}
/SwapsERC20.sol
// SPDX-License-Identifier: BCOM
pragma solidity =0.8.14;
contract SwapsERC20 {
string public constant name = "Verse Exchange";
string public constant symbol = "VERSE-X";
uint8 public constant decimals = 18;
address constant ZERO_ADDRESS = address(0);
uint256 constant UINT256_MAX = type(uint256).max;
uint256 public totalSupply;
mapping(address => uint256) public balanceOf;
mapping(address => mapping(address => uint256)) public allowance;
mapping(address => uint256) public nonces;
bytes32 public immutable DOMAIN_SEPARATOR;
bytes32 public constant PERMIT_TYPEHASH = keccak256(
"Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)"
);
event Approval(
address indexed owner,
address indexed spender,
uint256 value
);
event Transfer(
address indexed from,
address indexed to,
uint256 value
);
constructor() {
DOMAIN_SEPARATOR = keccak256(
abi.encode(
keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"),
keccak256(bytes(name)),
keccak256(bytes("1")),
block.chainid,
address(this)
)
);
}
function _mint(
address _to,
uint256 _value
)
internal
{
totalSupply =
totalSupply + _value;
unchecked {
balanceOf[_to] =
balanceOf[_to] + _value;
}
emit Transfer(
ZERO_ADDRESS,
_to,
_value
);
}
function _burn(
address _from,
uint256 _value
)
internal
{
unchecked {
totalSupply =
totalSupply - _value;
}
balanceOf[_from] =
balanceOf[_from] - _value;
emit Transfer(
_from,
ZERO_ADDRESS,
_value
);
}
function _approve(
address _owner,
address _spender,
uint256 _value
)
private
{
allowance[_owner][_spender] = _value;
emit Approval(
_owner,
_spender,
_value
);
}
function _transfer(
address _from,
address _to,
uint256 _value
)
private
{
balanceOf[_from] =
balanceOf[_from] - _value;
unchecked {
balanceOf[_to] =
balanceOf[_to] + _value;
}
emit Transfer(
_from,
_to,
_value
);
}
function approve(
address _spender,
uint256 _value
)
external
returns (bool)
{
_approve(
msg.sender,
_spender,
_value
);
return true;
}
function transfer(
address _to,
uint256 _value
)
external
returns (bool)
{
_transfer(
msg.sender,
_to,
_value
);
return true;
}
function transferFrom(
address _from,
address _to,
uint256 _value
)
external
returns (bool)
{
if (allowance[_from][msg.sender] != UINT256_MAX) {
allowance[_from][msg.sender] -= _value;
}
_transfer(
_from,
_to,
_value
);
return true;
}
function permit(
address _owner,
address _spender,
uint256 _value,
uint256 _deadline,
uint8 _v,
bytes32 _r,
bytes32 _s
)
external
{
require(
_deadline >= block.timestamp,
"SwapsERC20: PERMIT_CALL_EXPIRED"
);
bytes32 digest = keccak256(
abi.encodePacked(
"\x19\x01",
DOMAIN_SEPARATOR,
keccak256(
abi.encode(
PERMIT_TYPEHASH,
_owner,
_spender,
_value,
nonces[_owner]++,
_deadline
)
)
)
);
if (uint256(_s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
revert("SwapsERC20: INVALID_SIGNATURE");
}
address recoveredAddress = ecrecover(
digest,
_v,
_r,
_s
);
require(
recoveredAddress != ZERO_ADDRESS &&
recoveredAddress == _owner,
"SwapsERC20: INVALID_SIGNATURE"
);
_approve(
_owner,
_spender,
_value
);
}
}
/ISwapsPair.sol
// SPDX-License-Identifier: BCOM
pragma solidity =0.8.14;
import "./ISwapsERC20.sol";
interface ISwapsPair is ISwapsERC20 {
function MINIMUM_LIQUIDITY()
external
pure
returns (uint256);
function factory()
external
view
returns (address);
function token0()
external
view
returns (address);
function token1()
external
view
returns (address);
function getReserves()
external
view
returns (
uint112 reserve0,
uint112 reserve1,
uint32 blockTimestampLast
);
function price0CumulativeLast()
external
view
returns (uint256);
function price1CumulativeLast()
external
view
returns (uint256);
function kLast()
external
view
returns (uint256);
function mint(
address _to
)
external
returns (uint256 liquidity);
function burn(
address _to
)
external
returns (
uint256 amount0,
uint256 amount1
);
function swap(
uint256 _amount0Out,
uint256 _amount1Out,
address _to,
bytes calldata _data
)
external;
function skim()
external;
function initialize(
address,
address
)
external;
}
/SwapsPair.sol
// SPDX-License-Identifier: BCOM
pragma solidity =0.8.14;
import "./IERC20.sol";
import "./ISwapsFactory.sol";
import "./ISwapsCallee.sol";
import "./SwapsERC20.sol";
contract SwapsPair is SwapsERC20 {
uint224 constant Q112 = 2 ** 112;
uint112 constant UINT112_MAX = type(uint112).max;
uint256 public constant MINIMUM_LIQUIDITY = 10 ** 3;
bytes4 private constant SELECTOR = bytes4(
keccak256(bytes('transfer(address,uint256)'))
);
address public factory;
address public token0;
address public token1;
uint112 private reserve0;
uint112 private reserve1;
uint32 private blockTimestampLast;
uint256 public price0CumulativeLast;
uint256 public price1CumulativeLast;
uint256 public kLast;
uint256 private unlocked;
modifier lock() {
require(
unlocked == 1,
"SwapsPair: LOCKED"
);
unlocked = 0;
_;
unlocked = 1;
}
event Mint(
address indexed sender,
uint256 amount0,
uint256 amount1
);
event Burn(
address indexed sender,
uint256 amount0,
uint256 amount1,
address indexed to
);
event Swap(
address indexed sender,
uint256 amount0In,
uint256 amount1In,
uint256 amount0Out,
uint256 amount1Out,
address indexed to
);
event Sync(
uint112 reserve0,
uint112 reserve1
);
function initialize(
address _token0,
address _token1
)
external
{
require(
factory == ZERO_ADDRESS,
"SwapsPair: ALREADY_INITIALIZED"
);
token0 = _token0;
token1 = _token1;
factory = msg.sender;
unlocked = 1;
}
function getReserves()
public
view
returns (
uint112,
uint112,
uint32
)
{
return (
reserve0,
reserve1,
blockTimestampLast
);
}
function _update(
uint256 _balance0,
uint256 _balance1,
uint112 _reserve0,
uint112 _reserve1
)
private
{
require(
_balance0 <= UINT112_MAX &&
_balance1 <= UINT112_MAX,
"SwapsPair: OVERFLOW"
);
uint32 blockTimestamp = uint32(block.timestamp % 2 ** 32);
unchecked {
uint32 timeElapsed = blockTimestamp - blockTimestampLast;
if (timeElapsed > 0 && _reserve0 != 0 && _reserve1 != 0) {
price0CumulativeLast += uint256(uqdiv(encode(_reserve1), _reserve0)) * timeElapsed;
price1CumulativeLast += uint256(uqdiv(encode(_reserve0), _reserve1)) * timeElapsed;
}
}
reserve0 = uint112(_balance0);
reserve1 = uint112(_balance1);
blockTimestampLast = blockTimestamp;
emit Sync(
reserve0,
reserve1
);
}
function _mintFee(
uint112 _reserve0,
uint112 _reserve1,
uint256 _kLast
)
private
{
if (_kLast == 0) return;
uint256 rootK = sqrt(uint256(_reserve0) * _reserve1);
uint256 rootKLast = sqrt(_kLast);
if (rootK > rootKLast) {
uint256 liquidity = totalSupply
* (rootK - rootKLast)
/ (rootK * 5 + rootKLast);
if (liquidity == 0) return;
_mint(
ISwapsFactory(factory).feeTo(),
liquidity
);
}
}
function mint(
address _to
)
external
lock
returns (uint256 liquidity)
{
(
uint112 _reserve0,
uint112 _reserve1,
) = getReserves();
uint256 balance0 = IERC20(token0).balanceOf(address(this));
uint256 balance1 = IERC20(token1).balanceOf(address(this));
uint256 amount0 = balance0 - _reserve0;
uint256 amount1 = balance1 - _reserve1;
_mintFee(
_reserve0,
_reserve1,
kLast
);
uint256 _totalSupply = totalSupply;
if (_totalSupply == 0) {
liquidity = sqrt(
amount0 * amount1
) - MINIMUM_LIQUIDITY;
_mint(
ZERO_ADDRESS,
MINIMUM_LIQUIDITY
);
} else {
liquidity = min(
amount0 * _totalSupply / _reserve0,
amount1 * _totalSupply / _reserve1
);
}
require(
liquidity > 0,
"INSUFFICIENT_LIQUIDITY_MINTED"
);
_mint(
_to,
liquidity
);
_update(
balance0,
balance1,
_reserve0,
_reserve1
);
kLast = uint256(reserve0) * reserve1;
emit Mint(
msg.sender,
amount0,
amount1
);
}
function burn(
address _to
)
external
lock
returns (
uint256 amount0,
uint256 amount1
)
{
(
uint112 _reserve0,
uint112 _reserve1,
) = getReserves();
address _token0 = token0;
address _token1 = token1;
uint256 balance0 = IERC20(_token0).balanceOf(address(this));
uint256 balance1 = IERC20(_token1).balanceOf(address(this));
uint256 liquidity = balanceOf[address(this)];
_mintFee(
_reserve0,
_reserve1,
kLast
);
uint256 _totalSupply = totalSupply;
amount0 = liquidity * balance0 / _totalSupply;
amount1 = liquidity * balance1 / _totalSupply;
require(
amount0 > 0 &&
amount1 > 0,
"INSUFFICIENT_LIQUIDITY_BURNED"
);
_burn(
address(this),
liquidity
);
_safeTransfer(
_token0,
_to,
amount0
);
_safeTransfer(
_token1,
_to,
amount1
);
balance0 = IERC20(_token0).balanceOf(address(this));
balance1 = IERC20(_token1).balanceOf(address(this));
_update(
balance0,
balance1,
_reserve0,
_reserve1
);
kLast = uint256(reserve0) * reserve1;
emit Burn(
msg.sender,
amount0,
amount1,
_to
);
}
function swap(
uint256 _amount0Out,
uint256 _amount1Out,
address _to,
bytes calldata _data
)
external
lock
{
require(
_amount0Out > 0 ||
_amount1Out > 0,
"INSUFFICIENT_OUTPUT_AMOUNT"
);
(
uint112 _reserve0,
uint112 _reserve1,
) = getReserves();
require(
_amount0Out < _reserve0 &&
_amount1Out < _reserve1,
"INSUFFICIENT_LIQUIDITY"
);
uint256 balance0;
uint256 balance1;
{
address _token0 = token0;
address _token1 = token1;
if (_amount0Out > 0) _safeTransfer(_token0, _to, _amount0Out);
if (_amount1Out > 0) _safeTransfer(_token1, _to, _amount1Out);
if (_data.length > 0) ISwapsCallee(_to).swapsCall(
msg.sender,
_amount0Out,
_amount1Out,
_data
);
balance0 = IERC20(_token0).balanceOf(address(this));
balance1 = IERC20(_token1).balanceOf(address(this));
}
uint256 _amount0In =
balance0 > _reserve0 - _amount0Out ?
balance0 - (_reserve0 - _amount0Out) : 0;
uint256 _amount1In =
balance1 > _reserve1 - _amount1Out ?
balance1 - (_reserve1 - _amount1Out) : 0;
require(
_amount0In > 0 ||
_amount1In > 0,
"INSUFFICIENT_INPUT_AMOUNT"
);
{
uint256 balance0Adjusted = balance0 * 1000 - (_amount0In * 3);
uint256 balance1Adjusted = balance1 * 1000 - (_amount1In * 3);
require(
balance0Adjusted * balance1Adjusted >=
uint256(_reserve0)
* _reserve1
* (1000 ** 2)
);
}
_update(
balance0,
balance1,
_reserve0,
_reserve1
);
emit Swap(
msg.sender,
_amount0In,
_amount1In,
_amount0Out,
_amount1Out,
_to
);
}
function skim()
external
lock
{
address _token0 = token0;
address _token1 = token1;
address _feesTo = ISwapsFactory(factory).feeTo();
_safeTransfer(
_token0,
_feesTo,
IERC20(_token0).balanceOf(address(this)) - reserve0
);
_safeTransfer(
_token1,
_feesTo,
IERC20(_token1).balanceOf(address(this)) - reserve1
);
}
function sync()
external
lock
{
_update(
IERC20(token0).balanceOf(address(this)),
IERC20(token1).balanceOf(address(this)),
reserve0,
reserve1
);
}
function encode(
uint112 _y
)
pure
internal
returns (uint224 z)
{
unchecked {
z = uint224(_y) * Q112;
}
}
function uqdiv(
uint224 _x,
uint112 _y
)
pure
internal
returns (uint224 z)
{
unchecked {
z = _x / uint224(_y);
}
}
function min(
uint256 _x,
uint256 _y
)
internal
pure
returns (uint256 z)
{
z = _x < _y ? _x : _y;
}
function sqrt(
uint256 _y
)
internal
pure
returns (uint256 z)
{
unchecked {
if (_y > 3) {
z = _y;
uint256 x = _y / 2 + 1;
while (x < z) {
z = x;
x = (_y / x + x) / 2;
}
} else if (_y != 0) {
z = 1;
}
}
}
function _safeTransfer(
address _token,
address _to,
uint256 _value
)
internal
{
(bool success, bytes memory data) = _token.call(
abi.encodeWithSelector(
SELECTOR,
_to,
_value
)
);
require(
success && (
data.length == 0 || abi.decode(
data, (bool)
)
),
"SwapsPair: TRANSFER_FAILED"
);
}
}
/IERC20.sol
// SPDX-License-Identifier: BCOM
pragma solidity =0.8.14;
interface IERC20 {
function balanceOf(
address _owner
)
external
view
returns (uint256);
}
Compiler Settings
{"remappings":[],"optimizer":{"runs":200,"enabled":true},"metadata":{"bytecodeHash":"ipfs"},"libraries":{},"evmVersion":"london","compilationTarget":{"SwapsFactory.sol":"SwapsFactory"}}
Contract ABI
[{"type":"constructor","stateMutability":"nonpayable","inputs":[{"type":"address","name":"_feeToSetter","internalType":"address"}]},{"type":"event","name":"PairCreated","inputs":[{"type":"address","name":"token0","internalType":"address","indexed":true},{"type":"address","name":"token1","internalType":"address","indexed":true},{"type":"address","name":"pair","internalType":"address","indexed":false},{"type":"uint256","name":"","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"allPairs","inputs":[{"type":"uint256","name":"","internalType":"uint256"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"uint256","name":"","internalType":"uint256"}],"name":"allPairsLength","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"cloneTarget","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[{"type":"address","name":"pair","internalType":"address"}],"name":"createPair","inputs":[{"type":"address","name":"_tokenA","internalType":"address"},{"type":"address","name":"_tokenB","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"feeTo","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"feeToSetter","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"getPair","inputs":[{"type":"address","name":"","internalType":"address"},{"type":"address","name":"","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setFeeTo","inputs":[{"type":"address","name":"_feeTo","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setFeeToSetter","inputs":[{"type":"address","name":"_feeToSetter","internalType":"address"}]}]
Contract Creation Code
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