mirror of
https://github.com/Instadapp/smart-contract.git
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maker implementation completed
This commit is contained in:
Samyak Jain
parent
ccd5d036a8
commit
df2b7f043d
330
contracts/ProxyLogics/InstaBridge.sol
Normal file
330
contracts/ProxyLogics/InstaBridge.sol
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@ -0,0 +1,330 @@
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pragma solidity ^0.5.7;
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interface TubInterface {
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function open() external returns (bytes32);
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function join(uint) external;
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function exit(uint) external;
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function lock(bytes32, uint) external;
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function free(bytes32, uint) external;
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function draw(bytes32, uint) external;
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function wipe(bytes32, uint) external;
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function give(bytes32, address) external;
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function shut(bytes32) external;
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function cups(bytes32) external view returns (address, uint, uint, uint);
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function gem() external view returns (TokenInterface);
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function gov() external view returns (TokenInterface);
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function skr() external view returns (TokenInterface);
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function sai() external view returns (TokenInterface);
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function ink(bytes32) external view returns (uint);
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function tab(bytes32) external returns (uint);
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function rap(bytes32) external returns (uint);
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function per() external view returns (uint);
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function pep() external view returns (PepInterface);
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}
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interface TokenInterface {
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function allowance(address, address) external view returns (uint);
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function balanceOf(address) external view returns (uint);
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function approve(address, uint) external;
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function transfer(address, uint) external returns (bool);
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function transferFrom(address, address, uint) external returns (bool);
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function deposit() external payable;
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function withdraw(uint) external;
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}
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interface PepInterface {
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function peek() external returns (bytes32, bool);
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}
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interface UniswapExchange {
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function getEthToTokenOutputPrice(uint256 tokensBought) external view returns (uint256 ethSold);
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function getTokenToEthOutputPrice(uint256 ethBought) external view returns (uint256 tokensSold);
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function tokenToTokenSwapOutput(
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uint256 tokensBought,
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uint256 maxTokensSold,
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uint256 maxEthSold,
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uint256 deadline,
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address tokenAddr
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) external returns (uint256 tokensSold);
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}
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interface BridgeInterface {
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function transferDAI(uint) external;
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}
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interface CTokenInterface {
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function redeem(uint redeemTokens) external returns (uint);
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function redeemUnderlying(uint redeemAmount) external returns (uint);
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function borrow(uint borrowAmount) external returns (uint);
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function liquidateBorrow(address borrower, uint repayAmount, address cTokenCollateral) external returns (uint);
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function liquidateBorrow(address borrower, address cTokenCollateral) external payable;
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function exchangeRateCurrent() external returns (uint);
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function getCash() external view returns (uint);
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function totalBorrowsCurrent() external returns (uint);
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function borrowRatePerBlock() external view returns (uint);
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function supplyRatePerBlock() external view returns (uint);
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function totalReserves() external view returns (uint);
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function reserveFactorMantissa() external view returns (uint);
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function totalSupply() external view returns (uint256);
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function balanceOf(address owner) external view returns (uint256 balance);
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function allowance(address, address) external view returns (uint);
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function approve(address, uint) external;
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function transfer(address, uint) external returns (bool);
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function transferFrom(address, address, uint) external returns (bool);
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}
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interface CERC20Interface {
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function mint(uint mintAmount) external returns (uint); // For ERC20
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function repayBorrow(uint repayAmount) external returns (uint); // For ERC20
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function repayBorrowBehalf(address borrower, uint repayAmount) external returns (uint); // For ERC20
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function borrowBalanceCurrent(address account) external returns (uint);
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}
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interface CETHInterface {
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function mint() external payable; // For ETH
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function repayBorrow() external payable; // For ETH
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function repayBorrowBehalf(address borrower) external payable; // For ETH
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function borrowBalanceCurrent(address account) external returns (uint);
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}
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interface ERC20Interface {
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function allowance(address, address) external view returns (uint);
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function balanceOf(address) external view returns (uint);
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function approve(address, uint) external;
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function transfer(address, uint) external returns (bool);
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function transferFrom(address, address, uint) external returns (bool);
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}
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interface ComptrollerInterface {
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function enterMarkets(address[] calldata cTokens) external returns (uint[] memory);
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function exitMarket(address cTokenAddress) external returns (uint);
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function getAssetsIn(address account) external view returns (address[] memory);
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function getAccountLiquidity(address account) external view returns (uint, uint, uint);
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}
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contract DSMath {
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function add(uint x, uint y) internal pure returns (uint z) {
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require((z = x + y) >= x, "math-not-safe");
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}
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function mul(uint x, uint y) internal pure returns (uint z) {
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require(y == 0 || (z = x * y) / y == x, "math-not-safe");
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}
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uint constant WAD = 10 ** 18;
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uint constant RAY = 10 ** 27;
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function rmul(uint x, uint y) internal pure returns (uint z) {
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z = add(mul(x, y), RAY / 2) / RAY;
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}
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function rdiv(uint x, uint y) internal pure returns (uint z) {
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z = add(mul(x, RAY), y / 2) / y;
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}
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function wmul(uint x, uint y) internal pure returns (uint z) {
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z = add(mul(x, y), WAD / 2) / WAD;
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}
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function wdiv(uint x, uint y) internal pure returns (uint z) {
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z = add(mul(x, WAD), y / 2) / y;
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}
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}
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contract Helper is DSMath {
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/**
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* @dev setting allowance to compound for the "user proxy" if required
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*/
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function setApproval(address erc20, uint srcAmt, address to) internal {
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TokenInterface erc20Contract = TokenInterface(erc20);
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uint tokenAllowance = erc20Contract.allowance(address(this), to);
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if (srcAmt > tokenAllowance) {
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erc20Contract.approve(to, 2**255);
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}
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}
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/**
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* @dev get ethereum address for trade
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*/
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function getAddressETH() public pure returns (address eth) {
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eth = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
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}
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/**
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* @dev get MakerDAO CDP engine
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*/
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function getSaiTubAddress() public pure returns (address sai) {
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sai = 0x448a5065aeBB8E423F0896E6c5D525C040f59af3;
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}
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/**
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* @dev get uniswap MKR exchange
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*/
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function getUniswapMKRExchange() public pure returns (address ume) {
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ume = 0x2C4Bd064b998838076fa341A83d007FC2FA50957;
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}
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/**
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* @dev get uniswap DAI exchange
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*/
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function getUniswapDAIExchange() public pure returns (address ude) {
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ude = 0x09cabEC1eAd1c0Ba254B09efb3EE13841712bE14;
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}
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/**
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* @dev get uniswap DAI exchange
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*/
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function getBridgeAddress() public pure returns (address bridge) {
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// bridge = <BRIDGE ADDRESS>;
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}
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/**
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* @dev get CDP bytes by CDP ID
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*/
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function getCDPBytes(uint cdpNum) public pure returns (bytes32 cup) {
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cup = bytes32(cdpNum);
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}
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}
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contract MakerHelper is Helper {
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event LogFree(uint cdpNum, uint amtETH, uint amtPETH, address owner);
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event LogWipe(uint cdpNum, uint daiAmt, uint mkrFee, uint daiFee, address owner);
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event LogShut(uint cdpNum);
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function setAllowance(TokenInterface _token, address _spender) private {
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if (_token.allowance(address(this), _spender) != uint(-1)) {
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_token.approve(_spender, uint(-1));
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}
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}
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function getCDPStats(bytes32 cup) internal view returns (uint ethCol, uint daiDebt) {
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TubInterface tub = TubInterface(getSaiTubAddress());
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(, uint pethCol, uint debt,) = tub.cups(cup);
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ethCol = rmul(pethCol, tub.per()); // get ETH col from PETH col
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daiDebt = debt;
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}
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function free(bytes32 cup, uint jam) internal {
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if (jam > 0) {
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address tubAddr = getSaiTubAddress();
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TubInterface tub = TubInterface(tubAddr);
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TokenInterface peth = tub.skr();
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TokenInterface weth = tub.gem();
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uint ink = rdiv(jam, tub.per());
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ink = rmul(ink, tub.per()) <= jam ? ink : ink - 1;
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tub.free(cup, ink);
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setAllowance(peth, tubAddr);
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tub.exit(ink);
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uint freeJam = weth.balanceOf(address(this)); // convert previous WETH into ETH as well
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weth.withdraw(freeJam);
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emit LogFree(
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uint(cup),
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freeJam,
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ink,
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address(this)
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);
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}
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}
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function wipe(bytes32 cup, uint _wad) internal returns (uint daiAmt) {
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if (_wad > 0) {
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TubInterface tub = TubInterface(getSaiTubAddress());
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UniswapExchange daiEx = UniswapExchange(getUniswapDAIExchange());
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UniswapExchange mkrEx = UniswapExchange(getUniswapMKRExchange());
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TokenInterface dai = tub.sai();
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TokenInterface mkr = tub.gov();
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(address lad,,,) = tub.cups(cup);
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require(lad == address(this), "cup-not-owned");
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setAllowance(dai, getSaiTubAddress());
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setAllowance(mkr, getSaiTubAddress());
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setAllowance(dai, getUniswapDAIExchange());
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(bytes32 val, bool ok) = tub.pep().peek();
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// MKR required for wipe = Stability fees accrued in Dai / MKRUSD value
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uint mkrFee = wdiv(rmul(_wad, rdiv(tub.rap(cup), tub.tab(cup))), uint(val));
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uint daiFeeAmt = daiEx.getTokenToEthOutputPrice(mkrEx.getEthToTokenOutputPrice(mkrFee));
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daiAmt = add(_wad, daiFeeAmt);
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BridgeInterface(getBridgeAddress()).transferDAI(daiAmt);
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if (ok && val != 0) {
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daiEx.tokenToTokenSwapOutput(
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mkrFee,
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daiAmt,
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uint(999000000000000000000),
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uint(1899063809), // 6th March 2030 GMT // no logic
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address(mkr)
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);
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}
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tub.wipe(cup, _wad);
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emit LogWipe(
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uint(cup),
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daiAmt,
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mkrFee,
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daiFeeAmt,
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address(this)
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);
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}
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}
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function wipeAndFree(bytes32 cup, uint jam, uint _wad) internal returns (uint daiAmt) {
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daiAmt = wipe(cup, _wad);
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free(cup, jam);
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}
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/**
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* @dev close CDP
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*/
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function shut(bytes32 cup) internal returns (uint daiAmt) {
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TubInterface tub = TubInterface(getSaiTubAddress());
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daiAmt = wipeAndFree(cup, rmul(tub.ink(cup), tub.per()), tub.tab(cup));
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tub.shut(cup);
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emit LogShut(uint(cup)); // fetch remaining data from WIPE & FREE events
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}
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}
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contract CompoundHelper is MakerHelper {
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}
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contract Bridge is CompoundHelper {
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function makerToCompound(uint cdpId, uint toConvert) public { // toConvert ranges from 0 to 1 and has (18 decimals)
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bytes32 cup = bytes32(cdpId);
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(uint ethCol, uint daiDebt) = getCDPStats(cup);
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uint ethFree = ethCol;
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uint daiAmt = daiDebt;
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if (toConvert < 10**18) {
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uint wipeAmt = wmul(daiDebt, toConvert);
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ethFree = wmul(ethCol, toConvert);
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daiAmt = wipe(cup, wipeAmt);
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free(cup, ethFree);
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} else {
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daiAmt = shut(cup);
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}
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}
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}
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