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- Contract name:
- Collector
- Optimization enabled
- false
- Compiler version
- v0.6.12+commit.27d51765
- EVM Version
- default
- Verified at
- 2022-11-01T12:17:22.352792Z
Constructor Arguments
0000000000000000000000002ef06a90b0e7ae3ae508e83ea6628a3987945460000000000000000000000000f0c73e6287867baa4f865a17ee711ec989c78ac0000000000000000000000000ae83571000af4499798d1e3b0fa0070eb3a3e3f9
Arg [0] (address) : 0x2ef06a90b0e7ae3ae508e83ea6628a3987945460
Arg [1] (address) : 0xf0c73e6287867baa4f865a17ee711ec989c78ac0
Arg [2] (address) : 0xae83571000af4499798d1e3b0fa0070eb3a3e3f9
Contract source code
// Sources flattened with hardhat v2.7.0 https://hardhat.org
// File contracts/libraries/SafeMath.sol
pragma solidity ^0.6.0;
// a library for performing overflow-safe math, courtesy of DappHub (https://github.com/dapphub/ds-math)
library SafeMath {
function add(uint x, uint y) internal pure returns (uint z) {
require((z = x + y) >= x, 'ds-math-add-overflow');
}
function sub(uint x, uint y) internal pure returns (uint z) {
require((z = x - y) <= x, 'ds-math-sub-underflow');
}
function mul(uint x, uint y) internal pure returns (uint z) {
require(y == 0 || (z = x * y) / y == x, 'ds-math-mul-overflow');
}
}
// File contracts/interfaces/IERC20.sol
pragma solidity >=0.6.0;
interface IERC20 {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function decimals() external view returns (uint8);
function totalSupply() external view returns (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint value) external returns (bool);
}
// File contracts/libraries/SafeERC20.sol
pragma solidity ^0.6.0;
library SafeERC20 {
function safeSymbol(IERC20 token) internal view returns(string memory) {
(bool success, bytes memory data) = address(token).staticcall(abi.encodeWithSelector(0x95d89b41));
return success && data.length > 0 ? abi.decode(data, (string)) : "???";
}
function safeName(IERC20 token) internal view returns(string memory) {
(bool success, bytes memory data) = address(token).staticcall(abi.encodeWithSelector(0x06fdde03));
return success && data.length > 0 ? abi.decode(data, (string)) : "???";
}
function safeDecimals(IERC20 token) public view returns (uint8) {
(bool success, bytes memory data) = address(token).staticcall(abi.encodeWithSelector(0x313ce567));
return success && data.length == 32 ? abi.decode(data, (uint8)) : 18;
}
function safeTransfer(IERC20 token, address to, uint256 amount) internal {
(bool success, bytes memory data) = address(token).call(abi.encodeWithSelector(0xa9059cbb, to, amount));
require(success && (data.length == 0 || abi.decode(data, (bool))), "SafeERC20: Transfer failed");
}
function safeTransferFrom(IERC20 token, address from, uint256 amount) internal {
(bool success, bytes memory data) = address(token).call(abi.encodeWithSelector(0x23b872dd, from, address(this), amount));
require(success && (data.length == 0 || abi.decode(data, (bool))), "SafeERC20: TransferFrom failed");
}
}
// File contracts/interfaces/IPair.sol
pragma solidity ^0.6.0;
interface IPair {
event Approval(address indexed owner, address indexed spender, uint value);
event Transfer(address indexed from, address indexed to, uint value);
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 (uint);
function balanceOf(address owner) external view returns (uint);
function allowance(address owner, address spender) external view returns (uint);
function approve(address spender, uint value) external returns (bool);
function transfer(address to, uint value) external returns (bool);
function transferFrom(address from, address to, uint 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 (uint);
function permit(address owner, address spender, uint value, uint deadline, uint8 v, bytes32 r, bytes32 s) external;
event Mint(address indexed sender, uint amount0, uint amount1);
event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);
event Swap(
address indexed sender,
uint amount0In,
uint amount1In,
uint amount0Out,
uint amount1Out,
address indexed to
);
event Sync(uint112 reserve0, uint112 reserve1);
function MINIMUM_LIQUIDITY() external pure returns (uint);
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 (uint);
function price1CumulativeLast() external view returns (uint);
function kLast() external view returns (uint);
function mint(address to) external returns (uint liquidity);
function burn(address to) external returns (uint amount0, uint amount1);
function swap(uint amount0Out, uint amount1Out, address to, bytes calldata data) external;
function skim(address to) external;
function sync() external;
function initialize(address, address) external;
}
// File contracts/interfaces/IFactory.sol
pragma solidity ^0.6.0;
interface IFactory {
event PairCreated(address indexed token0, address indexed token1, address pair, uint);
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(uint) external view returns (address pair);
function allPairsLength() external view returns (uint);
function createPair(address tokenA, address tokenB) external returns (address pair);
function setFeeTo(address) external;
function setFeeToSetter(address) external;
}
// File contracts/Ownable.sol
// Audit on 5-Jan-2021 by Keno and BoringCrypto
// P1 - P3: OK
pragma solidity ^0.6.0;
// Source: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/access/Ownable.sol + Claimable.sol
// Edited by BoringCrypto
// T1 - T4: OK
contract OwnableData {
// V1 - V5: OK
address public owner;
// V1 - V5: OK
address public pendingOwner;
}
// T1 - T4: OK
contract Ownable is OwnableData {
// E1: OK
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
constructor () internal {
owner = msg.sender;
emit OwnershipTransferred(address(0), msg.sender);
}
// F1 - F9: OK
// C1 - C21: OK
function transferOwnership(address newOwner, bool direct, bool renounce) public onlyOwner {
if (direct) {
// Checks
require(newOwner != address(0) || renounce, "Ownable: zero address");
// Effects
emit OwnershipTransferred(owner, newOwner);
owner = newOwner;
} else {
// Effects
pendingOwner = newOwner;
}
}
// F1 - F9: OK
// C1 - C21: OK
function claimOwnership() public {
address _pendingOwner = pendingOwner;
// Checks
require(msg.sender == _pendingOwner, "Ownable: caller != pending owner");
// Effects
emit OwnershipTransferred(owner, _pendingOwner);
owner = _pendingOwner;
pendingOwner = address(0);
}
// M1 - M5: OK
// C1 - C21: OK
modifier onlyOwner() {
require(msg.sender == owner, "Ownable: caller is not the owner");
_;
}
}
// File contracts/Collector.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;
contract Collector is Ownable {
using SafeMath for uint256;
using SafeERC20 for IERC20;
IFactory public immutable factory;
address public PToken;
address public immutable wada;
address public stakingContract;
bool public locked; //lock liquidity inside the collector until the staking contract is deployed
mapping(address => address) internal _bridges;
event LogBridgeSet(address indexed token, address indexed bridge);
event LogConvert(
address indexed server,
address indexed token0,
address indexed token1,
uint256 amount0,
uint256 amount1,
uint256 amountPToken
);
constructor(
address _factory,
address _PToken,
address _wada
) public {
factory = IFactory(_factory);
PToken = _PToken;
wada = _wada;
locked = true;
}
function bridgeFor(address token) public view returns (address bridge) {
bridge = _bridges[token];
if (bridge == address(0)) {
bridge = wada;
}
}
function setBridge(address token, address bridge) external onlyOwner {
// Checks
require(
token != PToken && token != wada && token != bridge,
"Collector: Invalid bridge"
);
// Effects
_bridges[token] = bridge;
emit LogBridgeSet(token, bridge);
}
function setStakingContract(address _stakingContract) external onlyOwner {
stakingContract = _stakingContract;
}
function setPToken(address _PToken) external onlyOwner {
PToken = _PToken;
}
modifier onlyEOA() {
// Try to make flash-loan exploit harder to do by only allowing externally owned addresses.
require(msg.sender == tx.origin, "Collector: must use EOA");
_;
}
modifier onlyWhenUnlocked() {
require(locked == false, "Collector: liquidity is locked");
_;
}
function setLock(bool _locked) external onlyOwner {
locked = _locked;
}
function convert(address token0, address token1) external onlyEOA() onlyWhenUnlocked() onlyOwner {
_convert(token0, token1);
}
function convertMultiple(
address[] calldata token0,
address[] calldata token1
) external onlyEOA() onlyWhenUnlocked() onlyOwner {
require(token0.length == token1.length, "the length of the array is invalid");
uint256 len = token0.length;
for (uint256 i = 0; i < len; i++) {
_convert(token0[i], token1[i]);
}
}
function _convert(address token0, address token1) internal {
IPair pair = IPair(factory.getPair(token0, token1));
require(address(pair) != address(0), "Collector: Invalid pair");
IERC20(address(pair)).safeTransfer(
address(pair),
pair.balanceOf(address(this))
);
(uint256 amount0, uint256 amount1) = pair.burn(address(this));
if (token0 != pair.token0()) {
(amount0, amount1) = (amount1, amount0);
}
emit LogConvert(
msg.sender,
token0,
token1,
amount0,
amount1,
_convertStep(token0, token1, amount0, amount1)
);
}
function _convertStep(
address token0,
address token1,
uint256 amount0,
uint256 amount1
) internal returns (uint256 PTokenOut) {
// Interactions
if (token0 == token1) {
uint256 amount = amount0.add(amount1);
if (token0 == PToken) {
IERC20(PToken).safeTransfer(stakingContract, amount);
PTokenOut = amount;
} else if (token0 == wada) {
PTokenOut = _toPToken(wada, amount);
} else {
address bridge = bridgeFor(token0);
amount = _swap(token0, bridge, amount, address(this));
PTokenOut = _convertStep(bridge, bridge, amount, 0);
}
} else if (token0 == PToken) {
IERC20(PToken).safeTransfer(stakingContract, amount0);
PTokenOut = _toPToken(token1, amount1).add(amount0);
} else if (token1 == PToken) {
IERC20(PToken).safeTransfer(stakingContract, amount1);
PTokenOut = _toPToken(token0, amount0).add(amount1);
} else if (token0 == wada) {
// eg. ADA - USDC
PTokenOut = _toPToken(
wada,
_swap(token1, wada, amount1, address(this)).add(amount0)
);
} else if (token1 == wada) {
// eg. USDT - ADA
PTokenOut = _toPToken(
wada,
_swap(token0, wada, amount0, address(this)).add(amount1)
);
} else {
// eg. MIC - USDT
address bridge0 = bridgeFor(token0);
address bridge1 = bridgeFor(token1);
if (bridge0 == token1) {
// eg. MIC - USDT - and bridgeFor(MIC) = USDT
PTokenOut = _convertStep(
bridge0,
token1,
_swap(token0, bridge0, amount0, address(this)),
amount1
);
} else if (bridge1 == token0) {
// eg. WBTC - DSD - and bridgeFor(DSD) = WBTC
PTokenOut = _convertStep(
token0,
bridge1,
amount0,
_swap(token1, bridge1, amount1, address(this))
);
} else {
PTokenOut = _convertStep(
bridge0,
bridge1, // eg. USDT - DSD - and bridgeFor(DSD) = WBTC
_swap(token0, bridge0, amount0, address(this)),
_swap(token1, bridge1, amount1, address(this))
);
}
}
}
function _swap(
address fromToken,
address toToken,
uint256 amountIn,
address to
) internal returns (uint256 amountOut) {
IPair pair = IPair(factory.getPair(fromToken, toToken));
require(address(pair) != address(0), "Collector: Cannot convert");
(uint256 reserve0, uint256 reserve1, ) = pair.getReserves();
uint256 amountInWithFee = amountIn.mul(997);
if (fromToken == pair.token0()) {
amountOut =
amountInWithFee.mul(reserve1) /
reserve0.mul(1000).add(amountInWithFee);
IERC20(fromToken).safeTransfer(address(pair), amountIn);
pair.swap(0, amountOut, to, new bytes(0));
// TODO: Add maximum slippage?
} else {
amountOut =
amountInWithFee.mul(reserve0) /
reserve1.mul(1000).add(amountInWithFee);
IERC20(fromToken).safeTransfer(address(pair), amountIn);
pair.swap(amountOut, 0, to, new bytes(0));
// TODO: Add maximum slippage?
}
}
function _toPToken(address token, uint256 amountIn)
internal
returns (uint256 amountOut)
{
amountOut = _swap(token, PToken, amountIn, stakingContract);
}
}
Contract ABI
[{"type":"constructor","stateMutability":"nonpayable","inputs":[{"type":"address","name":"_factory","internalType":"address"},{"type":"address","name":"_PToken","internalType":"address"},{"type":"address","name":"_wada","internalType":"address"}]},{"type":"event","name":"LogBridgeSet","inputs":[{"type":"address","name":"token","internalType":"address","indexed":true},{"type":"address","name":"bridge","internalType":"address","indexed":true}],"anonymous":false},{"type":"event","name":"LogConvert","inputs":[{"type":"address","name":"server","internalType":"address","indexed":true},{"type":"address","name":"token0","internalType":"address","indexed":true},{"type":"address","name":"token1","internalType":"address","indexed":true},{"type":"uint256","name":"amount0","internalType":"uint256","indexed":false},{"type":"uint256","name":"amount1","internalType":"uint256","indexed":false},{"type":"uint256","name":"amountPToken","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"OwnershipTransferred","inputs":[{"type":"address","name":"previousOwner","internalType":"address","indexed":true},{"type":"address","name":"newOwner","internalType":"address","indexed":true}],"anonymous":false},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"PToken","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"bridge","internalType":"address"}],"name":"bridgeFor","inputs":[{"type":"address","name":"token","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"claimOwnership","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"convert","inputs":[{"type":"address","name":"token0","internalType":"address"},{"type":"address","name":"token1","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"convertMultiple","inputs":[{"type":"address[]","name":"token0","internalType":"address[]"},{"type":"address[]","name":"token1","internalType":"address[]"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"contract IFactory"}],"name":"factory","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"locked","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"owner","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"pendingOwner","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setBridge","inputs":[{"type":"address","name":"token","internalType":"address"},{"type":"address","name":"bridge","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setLock","inputs":[{"type":"bool","name":"_locked","internalType":"bool"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setPToken","inputs":[{"type":"address","name":"_PToken","internalType":"address"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"setStakingContract","inputs":[{"type":"address","name":"_stakingContract","internalType":"address"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"stakingContract","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"transferOwnership","inputs":[{"type":"address","name":"newOwner","internalType":"address"},{"type":"bool","name":"direct","internalType":"bool"},{"type":"bool","name":"renounce","internalType":"bool"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"wada","inputs":[]}]
Deployed ByteCode
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