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InstaCompMigrate basics done
This commit is contained in:
Samyak Jain
parent
74a5924195
commit
a2568d7de2
255
contracts/ProxyLogics/InstaCompMigrate.sol
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255
contracts/ProxyLogics/InstaCompMigrate.sol
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pragma solidity ^0.5.7;
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interface CTokenInterface {
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function borrow(uint borrowAmount) external returns (uint);
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function borrowBalanceCurrent(address account) external returns (uint);
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function repayBorrow(uint repayAmount) external returns (uint); // For ERC20
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function totalReserves() external view returns (uint);
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function underlying() external view returns (address);
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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 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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interface PoolInterface {
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function accessToken(address[] calldata ctknAddr, uint[] calldata tknAmt, bool isCompound) external;
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function paybackToken(address[] calldata ctknAddr, bool isCompound) external payable;
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}
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/** Swap Functionality */
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interface ScdMcdMigration {
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function swapDaiToSai(uint daiAmt) external;
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}
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contract DSMath {
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function sub(uint x, uint y) internal pure returns (uint z) {
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z = x - y <= x ? x - y : 0;
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}
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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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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 Helpers is DSMath {
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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 Compound Comptroller Address
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*/
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function getComptrollerAddress() public pure returns (address troller) {
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troller = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B;
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}
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/**
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* @dev get Compound Comptroller Address
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*/
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function getCSaiAddress() public pure returns (address saiAddr) {
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// troller = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B;
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}
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/**
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* @dev get Compound Comptroller Address
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*/
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function getCDaiAddress() public pure returns (address daiAddr) {
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// troller = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B;
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}
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/**
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* @dev get Compound Comptroller Address
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*/
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function getSaiAddress() public pure returns (address saiAddr) {
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// troller = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B;
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}
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/**
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* @dev get Compound Comptroller Address
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*/
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function getDaiAddress() public pure returns (address daiAddr) {
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// troller = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B;
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}
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/**
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* @dev get Compound Comptroller Address
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*/
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function getLiquidityAddress() public pure returns (address poolAddr) {
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// poolAddr = 0x3d9819210A31b4961b30EF54bE2aeD79B9c9Cd3B;
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}
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function enterMarket(address cErc20) internal {
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ComptrollerInterface troller = ComptrollerInterface(getComptrollerAddress());
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address[] memory markets = troller.getAssetsIn(address(this));
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bool isEntered = false;
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for (uint i = 0; i < markets.length; i++) {
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if (markets[i] == cErc20) {
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isEntered = true;
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}
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}
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if (!isEntered) {
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address[] memory toEnter = new address[](1);
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toEnter[0] = cErc20;
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troller.enterMarkets(toEnter);
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}
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}
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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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ERC20Interface erc20Contract = ERC20Interface(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, uint(-1));
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}
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}
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}
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contract PoolActions is Helpers {
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function accessLiquidity(uint amt) internal {
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address[] memory ctknAddrArr = new address[](1);
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ctknAddrArr[0] = getCSaiAddress();
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uint[] memory tknAmtArr = new uint[](1);
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tknAmtArr[0] = amt;
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PoolInterface(getLiquidityAddress()).accessToken(ctknAddrArr, tknAmtArr, false);
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}
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function paybackLiquidity(uint amt) internal {
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address[] memory ctknAddrArr = new address[](1);
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ctknAddrArr[0] = getCSaiAddress();
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ERC20Interface(getDaiAddress()).transfer(getLiquidityAddress(), amt);
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PoolInterface(getLiquidityAddress()).paybackToken(ctknAddrArr, false);
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}
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}
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/** Swap from Dai to Sai */
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contract MigrationProxyActions is PoolActions {
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function swapDaiToSai(
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address scdMcdMigration, // Migration contract address
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uint wad // Amount to swap
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) internal
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{
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ERC20Interface sai = ERC20Interface(getSaiAddress());
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ERC20Interface dai = ERC20Interface(getDaiAddress());
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if (dai.allowance(address(this), scdMcdMigration) < wad) {
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dai.approve(scdMcdMigration, wad);
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}
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ScdMcdMigration(scdMcdMigration).swapDaiToSai(wad);
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sai.transfer(getLiquidityAddress(), wad);
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paybackLiquidity(wad);
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}
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}
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contract CompoundResolver is MigrationProxyActions {
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event LogBorrow(address erc20, address cErc20, uint tokenAmt, address owner);
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event LogRepay(address erc20, address cErc20, uint tokenAmt, address owner);
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/**
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* @dev borrow ETH/ERC20
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*/
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function borrow(uint tokenAmt) internal {
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enterMarket(getCDaiAddress());
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require(CTokenInterface(getCDaiAddress()).borrow(tokenAmt) == 0, "got collateral?");
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address erc20 = CTokenInterface(getCDaiAddress()).underlying();
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ERC20Interface(erc20).transfer(getLiquidityAddress(), tokenAmt);
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emit LogBorrow(
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erc20,
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getCDaiAddress(),
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tokenAmt,
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address(this)
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);
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}
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/**
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* @dev Pay Debt ETH/ERC20
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*/
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function repayToken(uint tokenAmt) internal returns (uint toRepay) {
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CTokenInterface cToken = CTokenInterface(getCSaiAddress());
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address erc20 = CTokenInterface(getCSaiAddress()).underlying();
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ERC20Interface token = ERC20Interface(erc20);
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toRepay = token.balanceOf(msg.sender);
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uint borrows = cToken.borrowBalanceCurrent(address(this));
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toRepay = toRepay > tokenAmt ? tokenAmt : toRepay;
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toRepay = toRepay > borrows ? borrows : toRepay;
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accessLiquidity(toRepay);
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setApproval(erc20, toRepay, getCSaiAddress());
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require(cToken.repayBorrow(toRepay) == 0, "Enough Tokens?");
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emit LogRepay(
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erc20,
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getCSaiAddress(),
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toRepay,
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address(this)
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);
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}
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}
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contract CompMigration is CompoundResolver {
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function migrate(uint debtToMigrate, address scdMcdMigration) external {
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uint initialPoolBal = sub(getLiquidityAddress().balance, 10000000000);
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uint debtPaid = repayToken(debtToMigrate);
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borrow(debtPaid);
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swapDaiToSai(scdMcdMigration, debtPaid);
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uint finalPoolBal = getLiquidityAddress().balance;
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assert(finalPoolBal >= initialPoolBal);
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}
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}
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contract InstaCompound is CompMigration {
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function() external payable {}
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}
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