mirror of
https://github.com/Instadapp/smart-contract.git
synced 2024-07-29 22:08:07 +00:00
423 lines
14 KiB
Solidity
423 lines
14 KiB
Solidity
pragma solidity ^0.5.7;
|
|
|
|
interface CTokenInterface {
|
|
function redeemUnderlying(uint redeemAmount) external returns (uint);
|
|
function borrow(uint borrowAmount) external returns (uint);
|
|
function exchangeRateCurrent() external returns (uint);
|
|
function borrowBalanceCurrent(address account) external returns (uint);
|
|
|
|
function totalSupply() external view returns (uint256);
|
|
function balanceOf(address owner) external view returns (uint256 balance);
|
|
function allowance(address, address) external view returns (uint);
|
|
function approve(address, uint) external;
|
|
function transfer(address, uint) external returns (bool);
|
|
function transferFrom(address, address, uint) external returns (bool);
|
|
}
|
|
|
|
interface CERC20Interface {
|
|
function mint(uint mintAmount) external returns (uint); // For ERC20
|
|
function repayBorrow(uint repayAmount) external returns (uint); // For ERC20
|
|
function borrowBalanceCurrent(address account) external returns (uint);
|
|
}
|
|
|
|
interface CETHInterface {
|
|
function mint() external payable; // For ETH
|
|
function repayBorrow() external payable; // For ETH
|
|
function borrowBalanceCurrent(address account) external returns (uint);
|
|
}
|
|
|
|
interface ERC20Interface {
|
|
function allowance(address, address) external view returns (uint);
|
|
function balanceOf(address) external view returns (uint);
|
|
function approve(address, uint) external;
|
|
function transfer(address, uint) external returns (bool);
|
|
function transferFrom(address, address, uint) external returns (bool);
|
|
function deposit() external payable;
|
|
function withdraw(uint) external;
|
|
}
|
|
|
|
interface ComptrollerInterface {
|
|
function enterMarkets(address[] calldata cTokens) external returns (uint[] memory);
|
|
function getAssetsIn(address account) external view returns (address[] memory);
|
|
function getAccountLiquidity(address account) external view returns (uint, uint, uint);
|
|
}
|
|
|
|
interface CompOracleInterface {
|
|
function getUnderlyingPrice(address) external view returns (uint);
|
|
}
|
|
|
|
interface KyberInterface {
|
|
function trade(
|
|
address src,
|
|
uint srcAmount,
|
|
address dest,
|
|
address destAddress,
|
|
uint maxDestAmount,
|
|
uint minConversionRate,
|
|
address walletId
|
|
) external payable returns (uint);
|
|
}
|
|
|
|
|
|
contract DSMath {
|
|
|
|
function add(uint x, uint y) internal pure returns (uint z) {
|
|
require((z = x + y) >= x, "math-not-safe");
|
|
}
|
|
|
|
function sub(uint x, uint y) internal pure returns (uint z) {
|
|
z = x - y <= x ? x - y : 0;
|
|
}
|
|
|
|
function mul(uint x, uint y) internal pure returns (uint z) {
|
|
require(y == 0 || (z = x * y) / y == x, "math-not-safe");
|
|
}
|
|
|
|
uint constant WAD = 10 ** 18;
|
|
|
|
function wmul(uint x, uint y) internal pure returns (uint z) {
|
|
z = add(mul(x, y), WAD / 2) / WAD;
|
|
}
|
|
|
|
function wdiv(uint x, uint y) internal pure returns (uint z) {
|
|
z = add(mul(x, WAD), y / 2) / y;
|
|
}
|
|
|
|
}
|
|
|
|
|
|
contract Helpers is DSMath {
|
|
|
|
/**
|
|
* @dev get ethereum address for trade
|
|
*/
|
|
function getAddressETH() public pure returns (address eth) {
|
|
eth = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
|
|
}
|
|
|
|
/**
|
|
* @dev get ethereum address for trade
|
|
*/
|
|
function getAddressWETH() public pure returns (address eth) {
|
|
eth = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
|
|
}
|
|
|
|
/**
|
|
* @dev get ethereum address for trade
|
|
*/
|
|
function getAddressUSDC() public pure returns (address usdc) {
|
|
usdc = 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48;
|
|
}
|
|
|
|
/**
|
|
* @dev get ethereum address for trade
|
|
*/
|
|
function getAddressZRXExchange() public pure returns (address zrxExchange) {
|
|
zrxExchange = 0x080bf510FCbF18b91105470639e9561022937712;
|
|
}
|
|
|
|
function getAddressZRXERC20() public pure returns (address zrxerc20) {
|
|
zrxerc20 = 0x95E6F48254609A6ee006F7D493c8e5fB97094ceF;
|
|
}
|
|
|
|
/**
|
|
* @dev get ethereum address for trade
|
|
*/
|
|
function getAddressKyberProxy() public pure returns (address kyberProxy) {
|
|
kyberProxy = 0x818E6FECD516Ecc3849DAf6845e3EC868087B755;
|
|
}
|
|
|
|
/**
|
|
* @dev get Compound Comptroller Address
|
|
*/
|
|
function getComptrollerAddress() public pure returns (address troller) {
|
|
troller = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B;
|
|
}
|
|
|
|
/**
|
|
* @dev get Compound Comptroller Address
|
|
*/
|
|
function getCompOracleAddress() public pure returns (address troller) {
|
|
troller = 0xe7664229833AE4Abf4E269b8F23a86B657E2338D;
|
|
}
|
|
|
|
/**
|
|
* @dev get Compound Comptroller Address
|
|
*/
|
|
function getCETHAddress() public pure returns (address cEth) {
|
|
cEth = 0x4Ddc2D193948926D02f9B1fE9e1daa0718270ED5;
|
|
}
|
|
|
|
/**
|
|
* @dev get Compound Comptroller Address
|
|
*/
|
|
function getCUSDCAddress() public pure returns (address cUsdc) {
|
|
cUsdc = 0x39AA39c021dfbaE8faC545936693aC917d5E7563;
|
|
}
|
|
|
|
/**
|
|
* @dev get Compound Comptroller Address
|
|
*/
|
|
function getAddressAdmin() public pure returns (address admin) {
|
|
admin = 0xa7615CD307F323172331865181DC8b80a2834324;
|
|
}
|
|
|
|
function enterMarket(address cErc20) internal {
|
|
ComptrollerInterface troller = ComptrollerInterface(getComptrollerAddress());
|
|
address[] memory markets = troller.getAssetsIn(address(this));
|
|
bool isEntered = false;
|
|
for (uint i = 0; i < markets.length; i++) {
|
|
if (markets[i] == cErc20) {
|
|
isEntered = true;
|
|
}
|
|
}
|
|
if (!isEntered) {
|
|
address[] memory toEnter = new address[](1);
|
|
toEnter[0] = cErc20;
|
|
troller.enterMarkets(toEnter);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @dev setting allowance to compound for the "user proxy" if required
|
|
*/
|
|
function setApproval(address erc20, uint srcAmt, address to) internal {
|
|
ERC20Interface erc20Contract = ERC20Interface(erc20);
|
|
uint tokenAllowance = erc20Contract.allowance(address(this), to);
|
|
if (srcAmt > tokenAllowance) {
|
|
erc20Contract.approve(to, 2**255);
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
|
|
contract CompoundHelper is Helpers {
|
|
|
|
/**
|
|
* @dev get users overall details for Compound
|
|
*/
|
|
function getCompStats(
|
|
address user,
|
|
address[] memory cTokenAddr,
|
|
uint[] memory cTokenFactor
|
|
) public returns (uint totalSupply, uint totalBorrow, uint maxBorrow, uint borrowRemain, uint maxWithdraw, uint ratio)
|
|
{
|
|
for (uint i = 0; i < cTokenAddr.length; i++) {
|
|
address cTokenAdd = cTokenAddr[i];
|
|
uint factor = cTokenFactor[i];
|
|
(uint supplyInEth, uint borrowInEth) = compSupplyBorrow(cTokenAdd, user);
|
|
totalSupply += supplyInEth;
|
|
totalBorrow += borrowInEth;
|
|
maxBorrow += wmul(supplyInEth, factor);
|
|
}
|
|
borrowRemain = sub(maxBorrow, totalBorrow);
|
|
maxWithdraw = sub(wdiv(borrowRemain, 750000000000000000), 10); // divide it by 0.75 (ETH Factor)
|
|
uint userEthSupply = getEthSupply(user);
|
|
maxWithdraw = userEthSupply > maxWithdraw ? maxWithdraw : userEthSupply;
|
|
ratio = wdiv(totalBorrow, totalSupply);
|
|
}
|
|
|
|
/**
|
|
* @dev get user's token supply and borrow in ETH
|
|
*/
|
|
function compSupplyBorrow(address cTokenAdd, address user) internal returns(uint supplyInEth, uint borrowInEth) {
|
|
CTokenInterface cTokenContract = CTokenInterface(cTokenAdd);
|
|
uint tokenPriceInEth = CompOracleInterface(getCompOracleAddress()).getUnderlyingPrice(cTokenAdd);
|
|
uint cTokenBal = sub(cTokenContract.balanceOf(user), 1);
|
|
uint cTokenExchangeRate = cTokenContract.exchangeRateCurrent();
|
|
uint tokenSupply = sub(wmul(cTokenBal, cTokenExchangeRate), 1);
|
|
supplyInEth = sub(wmul(tokenSupply, tokenPriceInEth), 10);
|
|
uint tokenBorrowed = cTokenContract.borrowBalanceCurrent(user);
|
|
borrowInEth = add(wmul(tokenBorrowed, tokenPriceInEth), 10);
|
|
}
|
|
|
|
function getEthSupply(address user) internal returns (uint ethSupply) {
|
|
CTokenInterface cTokenContract = CTokenInterface(getCETHAddress());
|
|
uint cTokenBal = sub(cTokenContract.balanceOf(user), 1);
|
|
uint cTokenExchangeRate = cTokenContract.exchangeRateCurrent();
|
|
ethSupply = wmul(cTokenBal, cTokenExchangeRate);
|
|
}
|
|
|
|
function usdcBorrowed(address user) internal returns (uint usdcAmt) {
|
|
CTokenInterface cTokenContract = CTokenInterface(getCUSDCAddress());
|
|
usdcAmt = cTokenContract.borrowBalanceCurrent(user);
|
|
}
|
|
|
|
function getUsdcRemainBorrow(uint usdcInEth) internal view returns (uint usdcAmt) {
|
|
uint tokenPriceInEth = CompOracleInterface(getCompOracleAddress()).getUnderlyingPrice(getCUSDCAddress());
|
|
usdcAmt = sub(wdiv(usdcInEth, tokenPriceInEth), 10);
|
|
}
|
|
|
|
}
|
|
|
|
|
|
contract CompoundResolver is CompoundHelper {
|
|
|
|
event LogMint(address erc20, address cErc20, uint tokenAmt, address owner);
|
|
event LogRedeem(address erc20, address cErc20, uint tokenAmt, address owner);
|
|
event LogBorrow(address erc20, address cErc20, uint tokenAmt, address owner);
|
|
event LogRepay(address erc20, address cErc20, uint tokenAmt, address owner);
|
|
|
|
/**
|
|
* @dev Deposit ETH/ERC20 and mint Compound Tokens
|
|
*/
|
|
function mintCEth(uint tokenAmt) internal {
|
|
CETHInterface cToken = CETHInterface(getCETHAddress());
|
|
cToken.mint.value(tokenAmt)();
|
|
emit LogMint(
|
|
getAddressETH(),
|
|
getCETHAddress(),
|
|
tokenAmt,
|
|
msg.sender
|
|
);
|
|
}
|
|
|
|
/**
|
|
* @dev Redeem ETH/ERC20 and mint Compound Tokens
|
|
* @param tokenAmt Amount of token To Redeem
|
|
*/
|
|
function redeemEth(uint tokenAmt) internal {
|
|
CTokenInterface cToken = CTokenInterface(getCETHAddress());
|
|
setApproval(getCETHAddress(), 10**30, getCETHAddress());
|
|
require(cToken.redeemUnderlying(tokenAmt) == 0, "something went wrong");
|
|
emit LogRedeem(
|
|
getAddressETH(),
|
|
getCETHAddress(),
|
|
tokenAmt,
|
|
address(this)
|
|
);
|
|
}
|
|
|
|
/**
|
|
* @dev borrow ETH/ERC20
|
|
*/
|
|
function borrow(uint tokenAmt) internal {
|
|
require(CTokenInterface(getCUSDCAddress()).borrow(tokenAmt) == 0, "got collateral?");
|
|
emit LogBorrow(
|
|
getAddressUSDC(),
|
|
getCUSDCAddress(),
|
|
tokenAmt,
|
|
address(this)
|
|
);
|
|
}
|
|
|
|
/**
|
|
* @dev Pay Debt ETH/ERC20
|
|
*/
|
|
function repayUsdc(uint tokenAmt) internal {
|
|
CERC20Interface cToken = CERC20Interface(getCUSDCAddress());
|
|
setApproval(getAddressUSDC(), tokenAmt, getCUSDCAddress());
|
|
require(cToken.repayBorrow(tokenAmt) == 0, "transfer approved?");
|
|
emit LogRepay(
|
|
getAddressUSDC(),
|
|
getCUSDCAddress(),
|
|
tokenAmt,
|
|
address(this)
|
|
);
|
|
}
|
|
|
|
}
|
|
|
|
|
|
contract CompoundSave is CompoundResolver {
|
|
|
|
event LogSaveCompoundUsdc(uint srcETH, uint destDAI);
|
|
|
|
event LogLeverageCompoundUsdc(uint srcDAI,uint destETH);
|
|
|
|
function save(
|
|
uint ethToFree,
|
|
uint zrxEthAmt,
|
|
bool isKyber,
|
|
bytes memory calldataHexString,
|
|
address[] memory ctokenAddr,
|
|
uint[] memory ctokenFactor
|
|
) public
|
|
{
|
|
enterMarket(getCETHAddress());
|
|
enterMarket(getCUSDCAddress());
|
|
(,,,,uint maxWithdraw,) = getCompStats(address(this), ctokenAddr, ctokenFactor);
|
|
uint ethToSwap = ethToFree < maxWithdraw ? ethToFree : maxWithdraw;
|
|
redeemEth(ethToSwap);
|
|
ERC20Interface wethContract = ERC20Interface(getAddressWETH());
|
|
wethContract.deposit.value(zrxEthAmt)();
|
|
wethContract.approve(getAddressZRXERC20(), zrxEthAmt);
|
|
(bool swapSuccess,) = getAddressZRXExchange().call(calldataHexString);
|
|
assert(swapSuccess);
|
|
uint remainEth = sub(ethToSwap, zrxEthAmt);
|
|
if (remainEth > 0 && isKyber) {
|
|
KyberInterface(getAddressKyberProxy()).trade.value(remainEth)(
|
|
getAddressETH(),
|
|
remainEth,
|
|
getAddressUSDC(),
|
|
address(this),
|
|
2**255,
|
|
0,
|
|
getAddressAdmin()
|
|
);
|
|
}
|
|
ERC20Interface usdcContract = ERC20Interface(getAddressUSDC());
|
|
uint usdcBal = usdcContract.balanceOf(address(this));
|
|
repayUsdc(usdcBal);
|
|
emit LogSaveCompoundUsdc(ethToSwap, usdcBal);
|
|
}
|
|
|
|
function leverage(
|
|
uint usdcToBorrow,
|
|
uint zrxUsdcAmt,
|
|
bytes memory calldataHexString,
|
|
bool isKyber,
|
|
address[] memory cTokenAddr,
|
|
uint[] memory ctokenFactor
|
|
) public
|
|
{
|
|
enterMarket(getCETHAddress());
|
|
enterMarket(getCUSDCAddress());
|
|
(,,,uint borrowRemain,,) = getCompStats(address(this), cTokenAddr, ctokenFactor);
|
|
uint usdcToSwap = getUsdcRemainBorrow(borrowRemain);
|
|
usdcToSwap = usdcToSwap < usdcToBorrow ? usdcToSwap : usdcToBorrow;
|
|
borrow(usdcToSwap);
|
|
ERC20Interface usdcContract = ERC20Interface(getAddressUSDC());
|
|
usdcContract.approve(getAddressZRXERC20(), zrxUsdcAmt);
|
|
(bool swapSuccess,) = getAddressZRXExchange().call(calldataHexString);
|
|
assert(swapSuccess);
|
|
uint usdcRemain = sub(usdcToSwap, zrxUsdcAmt);
|
|
if (usdcRemain > 0 && isKyber) {
|
|
usdcContract.approve(getAddressKyberProxy(), usdcRemain);
|
|
KyberInterface(getAddressKyberProxy()).trade.value(uint(0))(
|
|
getAddressUSDC(),
|
|
usdcRemain,
|
|
getAddressETH(),
|
|
address(this),
|
|
2**255,
|
|
0,
|
|
getAddressAdmin()
|
|
);
|
|
}
|
|
ERC20Interface wethContract = ERC20Interface(getAddressWETH());
|
|
uint wethBal = wethContract.balanceOf(address(this));
|
|
wethContract.approve(getAddressWETH(), wethBal);
|
|
wethContract.withdraw(wethBal);
|
|
mintCEth(address(this).balance);
|
|
emit LogLeverageCompoundUsdc(usdcToSwap, address(this).balance);
|
|
}
|
|
|
|
}
|
|
|
|
|
|
contract InstaCompSaveUsdc is CompoundSave {
|
|
|
|
uint public version;
|
|
|
|
/**
|
|
* @dev setting up variables on deployment
|
|
* 1...2...3 versioning in each subsequent deployments
|
|
*/
|
|
constructor(uint _version) public {
|
|
version = _version;
|
|
}
|
|
|
|
function() external payable {}
|
|
|
|
} |