mirror of
https://github.com/Instadapp/smart-contract.git
synced 2024-07-29 22:08:07 +00:00
322 lines
10 KiB
Solidity
322 lines
10 KiB
Solidity
pragma solidity ^0.5.0;
|
|
|
|
interface TubInterface {
|
|
function open() external returns (bytes32);
|
|
function join(uint) external;
|
|
function exit(uint) external;
|
|
function lock(bytes32, uint) external;
|
|
function free(bytes32, uint) external;
|
|
function draw(bytes32, uint) external;
|
|
function wipe(bytes32, uint) external;
|
|
function give(bytes32, address) external;
|
|
function shut(bytes32) external;
|
|
function cups(bytes32) external view returns (address, uint, uint, uint);
|
|
function gem() external view returns (IERC20);
|
|
function gov() external view returns (IERC20);
|
|
function skr() external view returns (IERC20);
|
|
function sai() external view returns (IERC20);
|
|
function ink(bytes32) external view returns (uint);
|
|
function tab(bytes32) external returns (uint);
|
|
function rap(bytes32) external returns (uint);
|
|
function per() external view returns (uint);
|
|
}
|
|
|
|
interface oracleInterface {
|
|
function read() external view returns (bytes32);
|
|
}
|
|
|
|
interface IERC20 {
|
|
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 KyberInterface {
|
|
function trade(
|
|
address src,
|
|
uint srcAmount,
|
|
address dest,
|
|
address destAddress,
|
|
uint maxDestAmount,
|
|
uint minConversionRate,
|
|
address walletId
|
|
) external payable returns (uint);
|
|
|
|
function getExpectedRate(
|
|
address src,
|
|
address dest,
|
|
uint srcQty
|
|
) external view returns (uint, 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) {
|
|
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, "math-not-safe");
|
|
}
|
|
|
|
uint constant WAD = 10 ** 18;
|
|
uint constant RAY = 10 ** 27;
|
|
|
|
function rmul(uint x, uint y) internal pure returns (uint z) {
|
|
z = add(mul(x, y), RAY / 2) / RAY;
|
|
}
|
|
|
|
function rdiv(uint x, uint y) internal pure returns (uint z) {
|
|
z = add(mul(x, RAY), y / 2) / y;
|
|
}
|
|
|
|
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 MakerDAO CDP engine
|
|
*/
|
|
function getSaiTubAddress() public pure returns (address sai) {
|
|
sai = 0x448a5065aeBB8E423F0896E6c5D525C040f59af3;
|
|
}
|
|
|
|
/**
|
|
* @dev get MakerDAO Oracle for ETH price
|
|
*/
|
|
function getOracleAddress() public pure returns (address oracle) {
|
|
oracle = 0x729D19f657BD0614b4985Cf1D82531c67569197B;
|
|
}
|
|
|
|
/**
|
|
* @dev get uniswap MKR exchange
|
|
*/
|
|
function getUniswapMKRExchange() public pure returns (address ume) {
|
|
ume = 0x2C4Bd064b998838076fa341A83d007FC2FA50957;
|
|
}
|
|
|
|
/**
|
|
* @dev get uniswap DAI exchange
|
|
*/
|
|
function getUniswapDAIExchange() public pure returns (address ude) {
|
|
ude = 0x09cabEC1eAd1c0Ba254B09efb3EE13841712bE14;
|
|
}
|
|
|
|
/**
|
|
* @dev get ethereum address for trade
|
|
*/
|
|
function getAddressETH() public pure returns (address eth) {
|
|
eth = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
|
|
}
|
|
|
|
/**
|
|
* @dev get ethereum address for trade
|
|
*/
|
|
function getAddressDAI() public pure returns (address dai) {
|
|
dai = 0x89d24A6b4CcB1B6fAA2625fE562bDD9a23260359;
|
|
}
|
|
|
|
/**
|
|
* @dev get kyber proxy address
|
|
*/
|
|
function getAddressKyber() public pure returns (address kyber) {
|
|
kyber = 0x818E6FECD516Ecc3849DAf6845e3EC868087B755;
|
|
}
|
|
|
|
/**
|
|
* @dev get admin address
|
|
*/
|
|
function getAddressAdmin() public pure returns (address admin) {
|
|
admin = 0x7284a8451d9a0e7Dc62B3a71C0593eA2eC5c5638;
|
|
}
|
|
|
|
/**
|
|
* @dev get CDP bytes by CDP ID
|
|
*/
|
|
function getCDPBytes(uint cdpNum) public pure returns (bytes32 cup) {
|
|
cup = bytes32(cdpNum);
|
|
}
|
|
|
|
/**
|
|
* @dev getting rates from Kyber
|
|
* @param src is the token being sold
|
|
* @param dest is the token being bought
|
|
* @param srcAmt is the amount of token being sold
|
|
* @return expectedRate - the current rate
|
|
* @return slippageRate - rate with 3% slippage
|
|
*/
|
|
function getExpectedRate(
|
|
address src,
|
|
address dest,
|
|
uint srcAmt
|
|
) public view returns (
|
|
uint expectedRate,
|
|
uint slippageRate
|
|
)
|
|
{
|
|
(expectedRate,) = KyberInterface(getAddressKyber()).getExpectedRate(src, dest, srcAmt);
|
|
slippageRate = (expectedRate / 100) * 99; // changing slippage rate upto 99%
|
|
}
|
|
|
|
/**
|
|
* @dev fetching token from the trader if ERC20
|
|
* @param trader is the trader
|
|
* @param src is the token which is being sold
|
|
* @param srcAmt is the amount of token being sold
|
|
*/
|
|
function getToken(address trader, address src, uint srcAmt) internal returns (uint ethQty) {
|
|
if (src == getAddressETH()) {
|
|
require(msg.value == srcAmt, "not-enough-src");
|
|
ethQty = srcAmt;
|
|
} else {
|
|
IERC20 tknContract = IERC20(src);
|
|
setApproval(tknContract, srcAmt);
|
|
tknContract.transferFrom(trader, address(this), srcAmt);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @dev setting allowance to kyber for the "user proxy" if required
|
|
* @param token is the token
|
|
* @param srcAmt is the amount of token to sell
|
|
*/
|
|
function setApproval(IERC20 tknContract, uint srcAmt) internal returns (uint) {
|
|
uint tokenAllowance = tknContract.allowance(address(this), getAddressKyber());
|
|
if (srcAmt > tokenAllowance) {
|
|
tknContract.approve(getAddressKyber(), 2**255);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @dev setting allowance to kyber for the "user proxy" if required
|
|
* @param token is the token
|
|
* @param srcAmt is the amount of token to sell
|
|
*/
|
|
function getCDPRatio(uint ethCol, uint daiDebt) internal returns (uint ratio) {
|
|
TubInterface tub = TubInterface(getSaiTubAddress());
|
|
}
|
|
|
|
}
|
|
|
|
|
|
contract GetDetails is Helpers {
|
|
|
|
function checkFinalPosition(uint cdpID) public view returns (uint finalEthCol, uint finalDaiDebt, uint finalColToUSD, uint timesPossible) {
|
|
bytes32 cdpToBytes = bytes32(cdpID);
|
|
TubInterface tub = TubInterface(getSaiTubAddress());
|
|
uint usdPerEth = uint(oracleInterface(getOracleAddress()).read());
|
|
(, uint pethCol, uint daiDebt,) = tub.cups(cdpToBytes);
|
|
uint ethCol = rmul(pethCol, tub.per()); // get ETH col from PETH col
|
|
(finalEthCol, finalDaiDebt, finalColToUSD, timesPossible) = _checkPositionLoop(
|
|
ethCol,
|
|
daiDebt,
|
|
usdPerEth,
|
|
0
|
|
);
|
|
}
|
|
|
|
function _checkPositionLoop(
|
|
uint ethCol,
|
|
uint daiDebt,
|
|
uint usdPerEth,
|
|
uint runTime
|
|
) internal view returns (
|
|
uint finalEthCol,
|
|
uint finalDaiDebt,
|
|
uint finalColToUSD,
|
|
uint timesPossible
|
|
)
|
|
{
|
|
uint colToUSD = wmul(ethCol, usdPerEth) - 10;
|
|
uint minColNeeded = wmul(daiDebt, 1500000000000000000) + 10;
|
|
uint colToFree = wdiv(sub(colToUSD, minColNeeded), usdPerEth);
|
|
(uint expectedRate,) = KyberInterface(getAddressKyber()).getExpectedRate(getAddressETH(), getAddressDAI(), colToFree);
|
|
uint expectedDAI = wmul(colToFree, expectedRate);
|
|
if (expectedDAI < daiDebt) {
|
|
uint runTimePlus = add(runTime, 1);
|
|
(finalEthCol, finalDaiDebt, finalColToUSD, timesPossible) = _checkPositionLoop(
|
|
sub(ethCol, colToFree),
|
|
sub(daiDebt, expectedDAI),
|
|
usdPerEth,
|
|
runTimePlus
|
|
);
|
|
} else {
|
|
finalEthCol = ethCol;
|
|
finalDaiDebt = daiDebt;
|
|
finalColToUSD = wmul(ethCol, usdPerEth);
|
|
timesPossible = runTime;
|
|
}
|
|
}
|
|
|
|
function getFinalPosition(uint cdpID, uint runTime) public view returns (uint finalEthCol, uint finalDaiDebt, uint finalColToUSD) {
|
|
bytes32 cdpToBytes = bytes32(cdpID);
|
|
TubInterface tub = TubInterface(getSaiTubAddress());
|
|
uint usdPerEth = uint(oracleInterface(getOracleAddress()).read());
|
|
(, uint pethCol, uint daiDebt,) = tub.cups(cdpToBytes);
|
|
uint ethCol = rmul(pethCol, tub.per()); // get ETH col from PETH col
|
|
(finalEthCol, finalDaiDebt, finalColToUSD) = _finalPositionLoop(
|
|
ethCol,
|
|
daiDebt,
|
|
usdPerEth,
|
|
runTime
|
|
);
|
|
}
|
|
|
|
function _finalPositionLoop(
|
|
uint ethCol,
|
|
uint daiDebt,
|
|
uint usdPerEth,
|
|
uint runTime
|
|
) internal view returns (
|
|
uint finalEthCol,
|
|
uint finalDaiDebt,
|
|
uint finalColToUSD
|
|
)
|
|
{
|
|
if (runTime != 0) {
|
|
uint colToUSD = wmul(ethCol, usdPerEth) - 10;
|
|
require(wdiv(colToUSD, daiDebt) > 1500000000000000000, "No-margin-to-leverage");
|
|
uint minColNeeded = wmul(daiDebt, 1500000000000000000) + 10;
|
|
uint colToFree = wdiv(sub(colToUSD, minColNeeded), usdPerEth);
|
|
(uint expectedRate,) = KyberInterface(getAddressKyber()).getExpectedRate(getAddressETH(), getAddressDAI(), colToFree);
|
|
uint expectedDAI = wmul(colToFree, expectedRate);
|
|
uint runTimeMinus = sub(runTime, 1);
|
|
(finalEthCol, finalDaiDebt, finalColToUSD) = _finalPositionLoop(
|
|
sub(ethCol, colToFree),
|
|
sub(daiDebt, expectedDAI),
|
|
usdPerEth,
|
|
runTimeMinus
|
|
);
|
|
} else {
|
|
finalEthCol = ethCol;
|
|
finalDaiDebt = daiDebt;
|
|
finalColToUSD = wmul(ethCol, usdPerEth);
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
|
|
contract Save is GetDetails {
|
|
|
|
|
|
|
|
} |