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// This contract is part of Zellic’s smart contract dataset, which is a collection of publicly available contract code gathered as of March 2023.
pragma solidity ^0.8.7;
/* Interface for ERC20 Tokens */
abstract contract Token {
function transferFrom(address _from, address _to, uint256 _value) public virtual returns (bool success);
function approve(address _spender, uint256 _value) public virtual returns (bool success);
}
abstract contract pToken {
function redeem(uint256 _value, string memory destinationAddress, bytes4 destinationChainId) public virtual returns (bool _success);
}
interface Curve {
function exchange_underlying(int128 i, int128 j, uint256 dx, uint256 min_dy, address receiver) external returns (uint256);
}
abstract contract WETH {
function deposit() external virtual payable;
function withdraw(uint256 amount) external virtual;
function approve(address guy, uint256 wad) external virtual;
}
interface UniswapRouter {
struct ExactInputSingleParams {
address tokenIn;
address tokenOut;
uint24 fee;
address recipient;
uint256 deadline;
uint256 amountIn;
uint256 amountOutMinimum;
uint160 sqrtPriceLimitX96;
}
function exactInputSingle(ExactInputSingleParams calldata params) external returns (uint256 amountOut);
}
contract BTCETHSwap {
fallback() external {
revert();
}
// ARB
address public PBTC_ADDRESS = address(0x62199B909FB8B8cf870f97BEf2cE6783493c4908);
address public WBTC_ADDRESS = address(0x2260FAC5E5542a773Aa44fBCfeDf7C193bc2C599);
address payable WETH_ADDRESS = payable(address(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2));
address public CURVE_PBTC_POOL = address(0xC9467E453620f16b57a34a770C6bceBECe002587);
address public UNISWAP_ROUTER = address(0x68b3465833fb72A70ecDF485E0e4C7bD8665Fc45);
int128 public CURVE_WBTC_INDEX = 2;
int128 public CURVE_PBTC_INDEX = 0;
bytes4 public PTOKENS_BTC_CHAINID = 0x01ec97de;
// Constructor function, initializes the contract and sets the core variables
constructor() {}
// Swap PBTC for ETH
function swapBTCforETH (uint256 amount, address payable recipient) public payable
{
Token(PBTC_ADDRESS).transferFrom(msg.sender, address(this), amount);
// Curve pBTC for wBTC
uint256 amount_wbtc = CurveSwap(
false,
amount
);
// Uniswap wBTC for ETH
uint256 amountETH = Uniswap(
WBTC_ADDRESS,
WETH_ADDRESS,
amount_wbtc,
recipient,
3000
);
WETH(WETH_ADDRESS).withdraw(amountETH);
}
// Swap ETH for PBTC
function swapETHforBTC (string memory recipient) public payable {
WETH(WETH_ADDRESS).deposit{value: msg.value}();
WETH(WETH_ADDRESS).approve(UNISWAP_ROUTER, msg.value);
// Uniswap ETH for WBTC
uint256 amount_WBTC = Uniswap(
WETH_ADDRESS,
WBTC_ADDRESS,
msg.value,
address(this),
3000
);
// Token(WBTC_ADDRESS).approve(CURVE_PBTC_POOL, amount_WBTC);
// // Curve wBTC to pBTC
// uint256 amount_pbtc = CurveSwap(
// true,
// amount_WBTC
// );
// // Redeem pBTC to recipient address
// pToken(PBTC_ADDRESS).redeem(
// amount_pbtc,
// recipient,
// PTOKENS_BTC_CHAINID
// );
}
// Uniswap
function Uniswap(
address tokenIn,
address tokenOut,
uint256 amountIn,
address recipient,
uint24 fee) internal returns (uint256)
{
UniswapRouter.ExactInputSingleParams memory params = UniswapRouter.ExactInputSingleParams(
tokenIn,
tokenOut,
fee,
recipient,
block.timestamp,
amountIn,
0,
0
);
uint256 amountOut = UniswapRouter(UNISWAP_ROUTER).exactInputSingle(params);
return amountOut;
}
// Curve
function CurveSwap(bool wtop, uint256 amountSell) internal returns (uint256)
{
int128 i;
int128 j;
if (wtop)
{
i = CURVE_WBTC_INDEX;
j = CURVE_PBTC_INDEX;
}
else
{
i = CURVE_PBTC_INDEX;
j = CURVE_WBTC_INDEX;
}
Curve(CURVE_PBTC_POOL).exchange_underlying(i, j, amountSell, 0, address(this));
}
} |