Untitled
unknown
plain_text
a year ago
7.2 kB
2
Indexable
Never
// The logic is simply to borrow some amount of tokens from any V2Pair or V3Pool, make a flash swap on it, swap then again in other
// two DEXs, finalize the flash swap and keep the remaning balance in the smart contract of that borrowed token.
// The borrowed token is usually the wrapped native token of the network. WETH for Ethereum, WBNB for BSC. I focused on BSC for budget
// reasons. BOR contains the address of the borrowed token, OTH the other transition token involved
pragma solidity ^0.8.19;
interface ierc {
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
function totalSupply() external view returns (uint256);
function balanceOf(address account) external view returns (uint256);
function transfer(address to, uint256 value) external returns (bool);
function allowance(address owner, address spender) external view returns (uint256);
function approve(address spender, uint256 value) external returns (bool);
function transferFrom(address from, address to, uint256 value) external returns (bool);
}
using Math for uint256;
//using SafeCast for uint256;
contract UBahn6 {
address Pair1;
address Pair2;
uint DEXA;
uint DEXB;
address t0;
address t1;
uint In;
address PancakePool = 0x0eD7e52944161450477ee417DE9Cd3a859b14fD0;
address BOR = 0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c;
uint160 MIN_SQRT_RATIO = 4295128739;
uint160 MAX_SQRT_RATIO = 1461446703485210103287273052203988822378723970342;
address OTH;
address owner;
bool secondo = false;
uint Q1;
uint Q2;
function uniswapV3SwapCallback(
int256 amount0Delta,
int256 amount1Delta,
bytes memory data
) external {
// Pay back the Pool
(uint ze, address to, address pai, uint Inn) = abi.decode(data,(uint,address,address,uint));
// IUniswapV3Pool(Pair1).swap(address(this),true,In,0,"");
uint F3 = uint(IUniswapV3Pool(pai).fee()/10**6);
if (ze==0) {
ierc(to).approve(pai,uint(amount0Delta*(1+int(F3))));
ierc(to).transfer(pai,uint(amount0Delta*(1+int(F3))));
}
if (ze==1) {
ierc(to).approve(pai,uint(amount1Delta*(1+int(F3))));
ierc(to).transfer(pai,uint(amount1Delta*(1+int(F3))));
}
}
function pancakeV3SwapCallback(
int256 amount0Delta,
int256 amount1Delta,
bytes memory data
) external {
// Pay back the Pool
(uint ze, address to, address pai, uint Inn) = abi.decode(data,(uint,address,address,uint));
// IUniswapV3Pool(Pair1).swap(address(this),true,In,0,"");
uint F3 = uint(IUniswapV3Pool(pai).fee()/10**6);
if (ze==0) {
ierc(to).approve(pai,uint(amount0Delta*(1+int(F3))));
ierc(to).transfer(pai,uint(amount0Delta*(1+int(F3))));
}
if (ze==1) {
ierc(to).approve(pai,uint(amount1Delta*(1+int(F3))));
ierc(to).transfer(pai,uint(amount1Delta*(1+int(F3))));
}
}
function Pairswap(uint amount,
uint dexa,
uint dexb,
address pair1,
address pair2,
uint q1,
uint q2) external payable
{
owner = msg.sender;
bytes memory by = abi.encode(dexa,dexb,pair1,pair2,q1,q2);
IUniswapV2Pair(PancakePool).swap(0,amount,address(this),by);
}
function pancakeCall(address sender, uint amount0, uint amount1, bytes calldata data) external {
(DEXA, DEXB, Pair1, Pair2, Q1, Q2) = abi.decode(data, (uint,uint,address,address,uint,uint));
In = ierc(BOR).balanceOf(address(this));
if (DEXA==2) {
t0 = IUniswapV2Pair(Pair1).token0();
t1 = IUniswapV2Pair(Pair1).token1();
(uint112 r0,uint112 r1,) = IUniswapV2Pair(Pair1).getReserves();
ierc(BOR).approve(address(this),ierc(BOR).balanceOf(address(this)));
ierc(BOR).transferFrom(address(this),Pair1,ierc(BOR).balanceOf(address(this)));
// uint Q = BOR==t0 ? getAmountOut(In,r0,r1) : getAmountOut(In,r1,r0);
if (BOR==t0) {
IUniswapV2Pair(Pair1).swap(0,Q1,address(this),"");
} else {
IUniswapV2Pair(Pair1).swap(Q1,0,address(this),""); }
} else {
t0 = IUniswapV3Pool(Pair1).token0();
t1 = IUniswapV3Pool(Pair1).token1();
if (BOR==t0) {
uint z = 0;
IUniswapV3Pool(Pair1).swap(address(this),true,int(In),MIN_SQRT_RATIO+1,abi.encode(z,BOR,Pair1,In));
} else {
uint z = 1;
IUniswapV3Pool(Pair1).swap(address(this),false,int(In),MAX_SQRT_RATIO-1,abi.encode(z,BOR,Pair1,In));
}}
secondo = true;
if (In==1500011) { revert("SECONDO TRUE"); }
uint am2;
if (BOR==t0) {
am2 = ierc(t1).balanceOf(address(this));
OTH = t1;
} else {
am2 = ierc(t0).balanceOf(address(this));
OTH = t0;
}
if (DEXB==2) {
address t2 = IUniswapV2Pair(Pair2).token0();
address t3 = IUniswapV2Pair(Pair2).token1();
(uint112 r2,uint112 r3,) = IUniswapV2Pair(Pair2).getReserves();
if (t2!=OTH && t3!=OTH) {
revert("Stesso token ma con indirizzi diversi");
}
// uint Q2;
// Q2 = BOR==t3 ? getAmountOut(am2,r2,r3) : getAmountOut(am2,r3,r2);
ierc(OTH).approve(address(this),ierc(OTH).balanceOf(address(this)));
ierc(OTH).transferFrom(address(this),Pair2,ierc(OTH).balanceOf(address(this)));
if (BOR==t3) {
IUniswapV2Pair(Pair2).swap(0,Q2,address(this),"");
} else {
IUniswapV2Pair(Pair2).swap(Q2,0,address(this),"");
}} else {
uint In2 = ierc(OTH).balanceOf(address(this));
address t2 = IUniswapV3Pool(Pair2).token0();
address t3 = IUniswapV3Pool(Pair2).token1();
if (BOR==t3) {
uint z = 0;
IUniswapV3Pool(Pair2).swap(address(this),true,int(In2),MIN_SQRT_RATIO+1,abi.encode(z,OTH,Pair2,In));
} else {
uint z = 1;
IUniswapV3Pool(Pair2).swap(address(this),false,int(In2),MAX_SQRT_RATIO-1,abi.encode(z,OTH,Pair2,In));
}}
uint Out = ierc(BOR).balanceOf(address(this));
if (Out<In) {
revert("T");
} else {
uint256 loanFee = Math.mulDiv(In,25,9997)+1;
ierc(BOR).approve(PancakePool,In+loanFee);
ierc(BOR).transferFrom(address(this),PancakePool,In+loanFee);
ierc(BOR).approve(owner,ierc(BOR).balanceOf(address(this)));
ierc(BOR).transferFrom(address(this),owner,ierc(BOR).balanceOf(address(this)));
}
}}