Address Contract Partially Verified
Address
0x0612e37Ea353D53d89727d4229EB3cbFa4C95594
Balance
0 ETH
Nonce
1
Code Size
9167 bytes
Creator
0xe7Bcb124...69b3 at tx 0x0f7db2b3...ded86e
Indexed Transactions
0 (1 on-chain, 0.7% indexed)
Contract Bytecode
9167 bytes
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Verified Source Code Partial Match
Compiler: v0.8.30+commit.73712a01
EVM: prague
Optimization: No
ArbitrageExecutor.sol 188 lines
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;
/// ---- Minimal ERC20 interface (no OZ dependency) ----
interface IERC20 {
function balanceOf(address) external view returns (uint256);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address, uint256) external returns (bool);
function transfer(address, uint256) external returns (bool);
function transferFrom(address, address, uint256) external returns (bool);
}
/// ---- Aave V3 pool interface (simple flash loan) ----
interface IAaveV3Pool {
function flashLoanSimple(
address receiverAddress,
address asset,
uint256 amount,
bytes calldata params,
uint16 referralCode
) external;
}
contract ArbitrageExecutor {
address public owner;
constructor() {
owner = msg.sender;
}
modifier onlyOwner() {
require(msg.sender == owner, "Not owner");
_;
}
struct CallData {
address to;
bytes data;
uint256 value; // ETH value if needed (usually 0)
}
struct ArbitrageParams {
address beneficiary; // Address to receive profit
address intermediateAsset; // Asset received after preSwap
address targetAsset; // Asset received after fillOrder
CallData fillOrder; // fillOrder call details
CallData swap; // Reserved (not used here)
CallData preSwap; // Optional: loaned asset -> intermediate asset
CallData postSwap; // Optional: target asset -> loaned asset
bool enablePreSwap;
bool enablePostSwap;
}
/// @notice Initiate Aave V3 simple flash loan
/// @dev The pool address is encoded into params for validation in callback
function execute(
address flashLoanProvider,
address flashLoanToken,
uint256 flashLoanAmount,
bytes calldata, // flashLoanParams placeholder
ArbitrageParams calldata arbitrageParams
) external onlyOwner {
bytes memory params = abi.encode(
flashLoanProvider,
arbitrageParams
);
IAaveV3Pool(flashLoanProvider).flashLoanSimple(
address(this),
flashLoanToken,
flashLoanAmount,
params,
0
);
}
/// @notice Aave V3 flash loan callback
/// @dev Uses _forceApprove to handle USDT-style non-zero -> non-zero approve restrictions.
/// Uses _safeTransfer to handle tokens that return false or have no return value.
function executeOperation(
address asset,
uint256 amount,
uint256 premium,
address initiator,
bytes calldata params
) external returns (bool) {
(address pool, ArbitrageParams memory ap) =
abi.decode(params, (address, ArbitrageParams));
// Security checks: only the correct pool can call, and must be initiated by this contract
require(msg.sender == pool, "Invalid pool caller");
require(initiator == address(this), "Invalid initiator");
// Step 0: preSwap (loaned asset -> intermediate asset)
if (ap.enablePreSwap) {
_forceApprove(IERC20(asset), ap.preSwap.to, amount);
(bool okPre, ) = ap.preSwap.to.call{value: ap.preSwap.value}(ap.preSwap.data);
require(okPre, "preSwap failed");
}
// Step 1: fillOrder (intermediate asset -> target asset)
{
uint256 intermediateBalance = IERC20(ap.intermediateAsset).balanceOf(address(this));
require(intermediateBalance > 0, "No intermediate asset");
_forceApprove(IERC20(ap.intermediateAsset), ap.fillOrder.to, intermediateBalance);
(bool okFill, ) = ap.fillOrder.to.call{value: ap.fillOrder.value}(ap.fillOrder.data);
require(okFill, "fillOrder failed");
}
// Step 2: postSwap (target asset -> loaned asset)
if (ap.enablePostSwap) {
uint256 targetBalance = IERC20(ap.targetAsset).balanceOf(address(this));
require(targetBalance > 0, "No target asset");
_forceApprove(IERC20(ap.targetAsset), ap.postSwap.to, targetBalance);
(bool okPost, ) = ap.postSwap.to.call{value: ap.postSwap.value}(ap.postSwap.data);
require(okPost, "postSwap failed");
}
// Step 3: repay flash loan
uint256 totalOwed = amount + premium;
uint256 repayAssetBalance = IERC20(asset).balanceOf(address(this));
require(repayAssetBalance >= totalOwed, "Insufficient repay balance");
// Approve the pool (msg.sender) to pull repayment
_forceApprove(IERC20(asset), msg.sender, totalOwed);
// Step 4: transfer profit to beneficiary
uint256 profit = repayAssetBalance - totalOwed;
if (profit > 0) {
_safeTransfer(IERC20(asset), ap.beneficiary, profit);
}
return true;
}
/// @notice Withdraw tokens or ETH (only owner)
function withdraw(address token, uint256 amount) external onlyOwner {
if (token == address(0)) {
require(address(this).balance >= amount, "Insufficient ETH");
(bool ok, ) = msg.sender.call{value: amount}("");
require(ok, "ETH withdraw failed");
} else {
_safeTransfer(IERC20(token), msg.sender, amount);
}
}
/// ---- Internal helper functions (no OZ dependency) ----
/// @dev Safe approve handling USDT-style non-zero -> non-zero restrictions.
/// Also handles tokens with no return value or bool return.
function _forceApprove(IERC20 token, address spender, uint256 value) internal {
require(spender != address(0), "Zero spender");
// Try direct approve(value)
(bool s1, bytes memory r1) = address(token).call(
abi.encodeWithSelector(token.approve.selector, spender, value)
);
if (s1 && (r1.length == 0 || abi.decode(r1, (bool)))) {
return; // Succeeded directly
}
// If failed, approve(0) first
(bool s2, bytes memory r2) = address(token).call(
abi.encodeWithSelector(token.approve.selector, spender, 0)
);
require(s2 && (r2.length == 0 || abi.decode(r2, (bool))), "approve(0) failed");
// Then approve(value)
(bool s3, bytes memory r3) = address(token).call(
abi.encodeWithSelector(token.approve.selector, spender, value)
);
require(s3 && (r3.length == 0 || abi.decode(r3, (bool))), "approve(value) failed");
}
/// @dev Safe transfer handling tokens with no return value or bool return.
function _safeTransfer(IERC20 token, address to, uint256 value) internal {
require(to != address(0), "Zero recipient");
(bool s, bytes memory r) = address(token).call(
abi.encodeWithSelector(token.transfer.selector, to, value)
);
require(s && (r.length == 0 || abi.decode(r, (bool))), "transfer failed");
}
/// Accept ETH
receive() external payable {}
}
Read Contract
owner 0x8da5cb5b → address
Write Contract 3 functions
These functions modify contract state and require a wallet transaction to execute.
execute 0xe429ae13
address flashLoanProvider
address flashLoanToken
uint256 flashLoanAmount
bytes
tuple arbitrageParams
executeOperation 0x1b11d0ff
address asset
uint256 amount
uint256 premium
address initiator
bytes params
returns: bool
withdraw 0xf3fef3a3
address token
uint256 amount
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