mirror of
https://github.com/Instadapp/smart-contract.git
synced 2024-07-29 22:08:07 +00:00
Added previous InstaMaker contract.
This commit is contained in:
Sowmayjain
parent
bc895045e0
commit
65a97fa1d0
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@ -2,6 +2,7 @@ pragma solidity ^0.5.0;
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library SafeMath {
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library SafeMath {
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function mul(uint256 a, uint256 b) internal pure returns (uint256) {
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function mul(uint256 a, uint256 b) internal pure returns (uint256) {
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if (a == 0) {
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if (a == 0) {
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return 0;
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return 0;
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@ -10,255 +11,203 @@ library SafeMath {
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require(c / a == b, "Assertion Failed");
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require(c / a == b, "Assertion Failed");
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return c;
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return c;
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}
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}
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function div(uint256 a, uint256 b) internal pure returns (uint256) {
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require(b > 0, "Assertion Failed");
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uint256 c = a / b;
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return c;
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}
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}
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}
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contract IERC20 {
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contract IERC20 {
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function balanceOf(address who) public view returns (uint256);
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function balanceOf(address who) external view returns (uint256);
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function allowance(address _owner, address _spender) public view returns (uint256);
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function transfer(address to, uint256 value) external returns (bool);
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function transfer(address to, uint256 value) public returns (bool);
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function approve(address spender, uint256 value) external returns (bool);
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function approve(address spender, uint256 value) public returns (bool);
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function transferFrom(address from, address to, uint256 value) external returns (bool);
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function transferFrom(address from, address to, uint256 value) public returns (bool);
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}
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}
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contract KyberInterface {
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contract MakerCDP {
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function trade(
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function open() external returns (bytes32 cup);
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address src,
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function join(uint wad) external; // Join PETH
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uint srcAmount,
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function exit(uint wad) external; // Exit PETH
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address dest,
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function give(bytes32 cup, address guy) external;
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address destAddress,
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function lock(bytes32 cup, uint wad) external;
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uint maxDestAmount,
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function free(bytes32 cup, uint wad) external;
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uint minConversionRate,
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function draw(bytes32 cup, uint wad) external;
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address walletId
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function wipe(bytes32 cup, uint wad) external;
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) public payable returns (uint);
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function per() external view returns (uint ray);
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function lad(bytes32 cup) external view returns (address);
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function getExpectedRate(
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address src,
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address dest,
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uint srcQty
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) public view returns (uint, uint);
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}
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}
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contract Helper {
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contract PriceInterface {
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function peek() external view returns (bytes32, bool);
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}
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contract WETHFace {
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function deposit() external payable;
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function withdraw(uint wad) external;
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}
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contract Helpers {
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using SafeMath for uint;
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using SafeMath for uint;
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using SafeMath for uint256;
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using SafeMath for uint256;
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/**
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function getETHRate() public view returns (uint) {
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* @dev get ethereum address for trade
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PriceInterface ethRate = PriceInterface(getAddress("ethfeed"));
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*/
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bytes32 ethrate;
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function getAddressETH() public pure returns (address eth) {
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(ethrate, ) = ethRate.peek();
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eth = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
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return uint(ethrate);
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}
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}
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/**
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function getCDP(address borrower) public view returns (uint, bytes32) {
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* @dev get kyber proxy address
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return (uint(cdps[borrower]), cdps[borrower]);
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*/
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function getAddressKyber() public pure returns (address kyber) {
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kyber = 0x692f391bCc85cefCe8C237C01e1f636BbD70EA4D;
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}
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}
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/**
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function approveERC20() public {
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* @dev get admin address
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IERC20 wethTkn = IERC20(getAddress("weth"));
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*/
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wethTkn.approve(cdpAddr, 2**256 - 1);
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function getAddressAdmin() public pure returns (address admin) {
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IERC20 pethTkn = IERC20(getAddress("peth"));
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admin = 0x7284a8451d9a0e7Dc62B3a71C0593eA2eC5c5638;
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pethTkn.approve(cdpAddr, 2**256 - 1);
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IERC20 mkrTkn = IERC20(getAddress("mkr"));
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mkrTkn.approve(cdpAddr, 2**256 - 1);
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IERC20 daiTkn = IERC20(getAddress("dai"));
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daiTkn.approve(cdpAddr, 2**256 - 1);
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}
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}
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/**
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* @dev get fees to trade // 200 => 0.2%
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*/
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function getUintFees() public pure returns (uint fees) {
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fees = 200;
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}
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/**
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* @dev gets ETH & token balance
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* @param src is the token being sold
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* @return ethBal - if not erc20, eth balance
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* @return tknBal - if not eth, erc20 balance
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*/
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function getBal(address src, address _owner) public view returns (uint, uint) {
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uint tknBal;
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if (src != getAddressETH()) {
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tknBal = IERC20(src).balanceOf(address(_owner));
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}
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return (address(_owner).balance, tknBal);
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}
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/**
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* @dev getting rates from Kyber
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* @param src is the token being sold
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* @param dest is the token being bought
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* @param srcAmt is the amount of token being sold
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* @return expectedRate - the current rate
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* @return slippageRate - rate with 3% slippage
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*/
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function getExpectedRate(
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address src,
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address dest,
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uint srcAmt
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) public view returns (
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uint expectedRate,
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uint slippageRate
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)
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{
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(expectedRate, slippageRate) = KyberInterface(getAddressKyber()).getExpectedRate(src, dest, srcAmt);
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slippageRate = (slippageRate / 97) * 99; // changing slippage rate upto 99%
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}
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/**
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* @dev fetching token from the trader if ERC20
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* @param trader is the trader
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* @param src is the token which is being sold
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* @param srcAmt is the amount of token being sold
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*/
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function getToken(address trader, address src, uint srcAmt) internal returns (uint ethQty) {
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if (src == getAddressETH()) {
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require(msg.value == srcAmt, "not-enough-src");
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ethQty = srcAmt;
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} else {
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manageApproval(src, srcAmt);
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IERC20(src).transferFrom(trader, address(this), srcAmt);
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}
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}
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/**
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* @dev setting allowance to kyber for the "user proxy" if required
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* @param token is the token address
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*/
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function setApproval(address token) internal returns (uint) {
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IERC20(token).approve(getAddressKyber(), 2**255);
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}
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/**
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* @dev configuring token approval with user proxy
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* @param token is the token
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*/
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function manageApproval(address token, uint srcAmt) internal returns (uint) {
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uint tokenAllowance = IERC20(token).allowance(address(this), getAddressKyber());
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if (srcAmt > tokenAllowance) {
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setApproval(token);
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}
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}
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}
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}
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contract Swap is Helper {
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contract IssueLoan is Helpers {
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/**
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event LockedETH(address borrower, uint lockETH, uint lockPETH, address lockedBy);
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* @param what 0 for BUY & 1 for SELL
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event LoanedDAI(address borrower, uint loanDAI, address payTo);
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*/
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event NewCDP(address borrower, bytes32 cdpBytes);
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event LogTrade(
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uint what,
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address src,
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uint srcAmt,
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address dest,
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uint destAmt,
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address beneficiary,
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uint minConversionRate,
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address affiliate
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);
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/**
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function pethPEReth(uint ethNum) public view returns (uint rPETH) {
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* @dev buying token where destAmt is fixed
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MakerCDP loanMaster = MakerCDP(cdpAddr);
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* @param src - token to sell
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rPETH = (ethNum.mul(10 ** 27)).div(loanMaster.per());
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* @param dest - token to buy
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}
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* @param srcAmt - token amount to sell
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* @param maxDestAmt is the max amount of token to be bought
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*/
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function buy(
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address src,
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address dest,
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uint srcAmt,
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uint maxDestAmt
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) public payable returns (uint destAmt)
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{
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uint ethQty = getToken(msg.sender, src, srcAmt);
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(, uint slippageRate) = getExpectedRate(src, dest, srcAmt);
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// (uint ethBal, uint tknBal) = getBal(src, address(this));
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function borrow(uint daiDraw, address beneficiary) public payable {
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if (msg.value > 0) {lockETH(msg.sender);}
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if (daiDraw > 0) {drawDAI(daiDraw, beneficiary);}
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}
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destAmt = KyberInterface(getAddressKyber()).trade.value(ethQty)(
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function lockETH(address borrower) public payable {
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src,
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MakerCDP loanMaster = MakerCDP(cdpAddr);
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srcAmt,
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if (cdps[borrower] == blankCDP) {
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dest,
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require(msg.sender == borrower, "Creating CDP for others is not permitted at the moment.");
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msg.sender,
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cdps[msg.sender] = loanMaster.open();
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maxDestAmt,
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emit NewCDP(msg.sender, cdps[msg.sender]);
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slippageRate,
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}
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getAddressAdmin()
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WETHFace wethTkn = WETHFace(getAddress("weth"));
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wethTkn.deposit.value(msg.value)(); // ETH to WETH
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uint pethToLock = pethPEReth(msg.value);
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loanMaster.join(pethToLock); // WETH to PETH
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loanMaster.lock(cdps[borrower], pethToLock); // PETH to CDP
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emit LockedETH(
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borrower, msg.value, pethToLock, msg.sender
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);
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);
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}
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// maxDestAmt usecase implementated on user proxy
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function drawDAI(uint daiDraw, address beneficiary) public {
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require(!freezed, "Operation Disabled");
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MakerCDP loanMaster = MakerCDP(cdpAddr);
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loanMaster.draw(cdps[msg.sender], daiDraw);
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IERC20 daiTkn = IERC20(getAddress("dai"));
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address payTo = msg.sender;
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if (payTo != address(0)) {
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payTo = beneficiary;
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}
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daiTkn.transfer(payTo, daiDraw);
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emit LoanedDAI(msg.sender, daiDraw, payTo);
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}
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}
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contract RepayLoan is IssueLoan {
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event WipedDAI(address borrower, uint daiWipe, uint mkrCharged, address wipedBy);
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event UnlockedETH(address borrower, uint ethFree);
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function repay(uint daiWipe, uint ethFree) public payable {
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if (daiWipe > 0) {wipeDAI(daiWipe, msg.sender);}
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if (ethFree > 0) {unlockETH(ethFree);}
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}
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function wipeDAI(uint daiWipe, address borrower) public payable {
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address dai = getAddress("dai");
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address mkr = getAddress("mkr");
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address eth = getAddress("eth");
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IERC20 daiTkn = IERC20(dai);
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IERC20 mkrTkn = IERC20(mkr);
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uint contractMKR = mkrTkn.balanceOf(address(this)); // contract MKR balance before wiping
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daiTkn.transferFrom(msg.sender, address(this), daiWipe); // get DAI to pay the debt
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MakerCDP loanMaster = MakerCDP(cdpAddr);
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loanMaster.wipe(cdps[borrower], daiWipe); // wipe DAI
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uint mkrCharged = contractMKR - mkrTkn.balanceOf(address(this)); // MKR fee = before wiping bal - after wiping bal
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// claiming paid MKR back
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if (msg.value > 0) { // Interacting with Kyber to swap ETH with MKR
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swapETHMKR(
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eth, mkr, mkrCharged, msg.value
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);
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} else { // take MKR directly from address
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mkrTkn.transferFrom(msg.sender, address(this), mkrCharged); // user paying MKR fees
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}
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emit WipedDAI(
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borrower, daiWipe, mkrCharged, msg.sender
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);
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}
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function unlockETH(uint ethFree) public {
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require(!freezed, "Operation Disabled");
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uint pethToUnlock = pethPEReth(ethFree);
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MakerCDP loanMaster = MakerCDP(cdpAddr);
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loanMaster.free(cdps[msg.sender], pethToUnlock); // CDP to PETH
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loanMaster.exit(pethToUnlock); // PETH to WETH
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WETHFace wethTkn = WETHFace(getAddress("weth"));
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wethTkn.withdraw(ethFree); // WETH to ETH
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msg.sender.transfer(ethFree);
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emit UnlockedETH(msg.sender, ethFree);
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}
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function swapETHMKR(
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address eth,
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address mkr,
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uint mkrCharged,
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uint ethQty
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) internal
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{
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InstaKyber instak = InstaKyber(getAddress("InstaKyber"));
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uint minRate;
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(, minRate) = instak.getExpectedPrice(eth, mkr, ethQty);
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uint mkrBought = instak.executeTrade.value(ethQty)(
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eth, mkr, ethQty, minRate, mkrCharged
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);
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require(mkrCharged == mkrBought, "ETH not sufficient to cover the MKR fees.");
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if (address(this).balance > 0) {
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if (address(this).balance > 0) {
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msg.sender.transfer(address(this).balance);
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msg.sender.transfer(address(this).balance);
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} else if (src != getAddressETH()) {
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IERC20 srcTkn = IERC20(src);
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uint srcBal = srcTkn.balanceOf(address(this));
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if (srcBal > 0) {
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srcTkn.transfer(msg.sender, srcBal);
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}
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}
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}
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emit LogTrade(
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0,
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src,
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srcAmt,
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dest,
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destAmt,
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msg.sender,
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slippageRate,
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getAddressAdmin()
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);
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}
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}
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/**
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* @dev selling token where srcAmt is fixed
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* @param src - token to sell
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* @param dest - token to buy
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* @param srcAmt - token amount to sell
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*/
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function sell(
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address src,
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address dest,
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uint srcAmt
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) public payable returns (uint destAmt)
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{
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uint ethQty = getToken(msg.sender, src, srcAmt);
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(, uint slippageRate) = getExpectedRate(src, dest, srcAmt);
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KyberInterface swapCall = KyberInterface(getAddressKyber());
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destAmt = swapCall.trade.value(ethQty)(
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src,
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srcAmt,
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dest,
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msg.sender,
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2**255,
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slippageRate,
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getAddressAdmin()
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);
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emit LogTrade(
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1,
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src,
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srcAmt,
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|
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dest,
|
|
||||||
destAmt,
|
|
||||||
msg.sender,
|
|
||||||
slippageRate,
|
|
||||||
getAddressAdmin()
|
|
||||||
);
|
|
||||||
|
|
||||||
}
|
|
||||||
|
|
||||||
}
|
}
|
||||||
|
|
||||||
|
contract InstaMaker is BorrowTasks {
|
||||||
contract InstaTrade is Swap {
|
|
||||||
|
|
||||||
uint public version;
|
uint public version;
|
||||||
|
|
||||||
|
|
|
||||||
Loading…
Reference in New Issue
Block a user