diff --git a/contracts/ProxyLogics/dydx/instaDydx.sol b/contracts/ProxyLogics/dydx/instaDydx.sol new file mode 100644 index 0000000..635ae28 --- /dev/null +++ b/contracts/ProxyLogics/dydx/instaDydx.sol @@ -0,0 +1,262 @@ +pragma solidity ^0.5.8; +pragma experimental ABIEncoderV2; + +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; +} + + +contract SoloMarginContract { + + struct Info { + address owner; // The address that owns the account + uint256 number; // A nonce that allows a single address to control many accounts + } + + enum ActionType { + Deposit, // supply tokens + Withdraw, // borrow tokens + Transfer, // transfer balance between accounts + Buy, // buy an amount of some token (externally) + Sell, // sell an amount of some token (externally) + Trade, // trade tokens against another account + Liquidate, // liquidate an undercollateralized or expiring account + Vaporize, // use excess tokens to zero-out a completely negative account + Call // send arbitrary data to an address + } + + enum AssetDenomination { + Wei, // the amount is denominated in wei + Par // the amount is denominated in par + } + + enum AssetReference { + Delta, // the amount is given as a delta from the current value + Target // the amount is given as an exact number to end up at + } + + struct AssetAmount { + bool sign; // true if positive + AssetDenomination denomination; + AssetReference ref; + uint256 value; + } + + struct ActionArgs { + ActionType actionType; + uint256 accountId; + AssetAmount amount; + uint256 primaryMarketId; + uint256 secondaryMarketId; + address otherAddress; + uint256 otherAccountId; + bytes data; + } + + struct Wei { + bool sign; // true if positive + uint256 value; + } + + function operate(Info[] memory accounts, ActionArgs[] memory actions) public; + function getAccountWei(Info memory account, uint256 marketId) public returns (Wei memory); + +} + + +contract DSMath { + + function add(uint x, uint y) internal pure returns (uint z) { + require((z = x + y) >= x, "math-not-safe"); + } + + 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 + */ + function getAddressETH() public pure returns (address eth) { + eth = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE; + } + + /** + * @dev get WETH address + */ + function getAddressWETH() public pure returns (address weth) { + weth = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; + } + + /** + * @dev get Dydx Solo Address + */ + function getSoloAddress() public pure returns (address addr) { + addr = 0x1E0447b19BB6EcFdAe1e4AE1694b0C3659614e4e; + } + + /** + * @dev setting allowance to dydx 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, uint(-1)); + } + } + + /** + * @dev getting actions arg + */ + function getActionsArgs(uint256 marketId, uint256 tokenAmt, bool sign) internal view returns (SoloMarginContract.ActionArgs[] memory) { + SoloMarginContract.ActionArgs[] memory actions = new SoloMarginContract.ActionArgs[](1); + SoloMarginContract.AssetAmount memory amount = SoloMarginContract.AssetAmount( + sign, + SoloMarginContract.AssetDenomination.Wei, + SoloMarginContract.AssetReference.Delta, + tokenAmt + ); + bytes memory empty; + // address otherAddr = (marketId == 0 && sign) ? getSoloPayableAddress() : address(this); + SoloMarginContract.ActionType action = sign ? SoloMarginContract.ActionType.Deposit : SoloMarginContract.ActionType.Withdraw; + actions[0] = SoloMarginContract.ActionArgs( + action, + 0, + amount, + marketId, + 0, + address(this), + 0, + empty + ); + return actions; + } + + /** + * @dev getting acccount arg + */ + function getAccountArgs(address owner) internal view returns (SoloMarginContract.Info[] memory) { + SoloMarginContract.Info[] memory accounts = new SoloMarginContract.Info[](1); + accounts[0] = (SoloMarginContract.Info(owner, 0)); + return accounts; + } + + /** + * @dev getting dydx balance + */ + function getDydxBal(address owner, uint256 marketId) internal returns (uint tokenBal, bool tokenSign) { + SoloMarginContract solo = SoloMarginContract(getSoloAddress()); + SoloMarginContract.Wei memory tokenWeiBal = solo.getAccountWei(getAccountArgs(owner)[0], marketId); + tokenBal = tokenWeiBal.value; + tokenSign = tokenWeiBal.sign; + } + +} + + +contract DydxResolver is Helpers { + + event LogDeposit(address erc20Addr, uint tokenAmt, address owner); + event LogWithdraw(address erc20Addr, uint tokenAmt, address owner); + event LogBorrow(address erc20Addr, uint tokenAmt, address owner); + event LogPayback(address erc20Addr, uint tokenAmt, address owner); + + /** + * @dev Deposit ETH/ERC20 + */ + function deposit(uint256 marketId, address erc20Addr, uint256 tokenAmt) public payable { + if (erc20Addr == getAddressETH()) { + ERC20Interface(getAddressWETH()).deposit.value(msg.value)(); + setApproval(getAddressWETH(), tokenAmt, getSoloAddress()); + } else { + require(ERC20Interface(erc20Addr).transferFrom(msg.sender, address(this), tokenAmt), "Allowance or not enough bal"); + setApproval(erc20Addr, tokenAmt, getSoloAddress()); + } + SoloMarginContract(getSoloAddress()).operate(getAccountArgs(), getActionsArgs(marketId, tokenAmt, true)); + emit LogDeposit(erc20Addr, tokenAmt, address(this)); + } + + /** + * @dev Payback ETH/ERC20 + */ + function payback(uint256 marketId, address erc20Addr, uint256 tokenAmt) public payable { + (uint toPayback, bool tokenSign) = getDydxBal(marketId); + require(!tokenSign, "No debt to payback"); + toPayback = toPayback > tokenAmt ? tokenAmt : toPayback; + if (erc20Addr == getAddressETH()) { + ERC20Interface(getAddressWETH()).deposit.value(toPayback)(); + setApproval(getAddressWETH(), toPayback, getSoloAddress()); + msg.sender.transfer(address(this).balance); + } else { + require(ERC20Interface(erc20Addr).transferFrom(msg.sender, address(this), toPayback), "Allowance or not enough bal"); + setApproval(erc20Addr, toPayback, getSoloAddress()); + } + SoloMarginContract(getSoloAddress()).operate(getAccountArgs(), getActionsArgs(marketId, toPayback, true)); + emit LogPayback(erc20Addr, toPayback, address(this)); + } + + /** + * @dev Withdraw ETH/ERC20 + */ + function withdraw(uint256 marketId, address erc20Addr, uint256 tokenAmt) public { + (uint toWithdraw, bool tokenSign) = getDydxBal(marketId); + require(tokenSign, "token not deposited"); + toWithdraw = toWithdraw > tokenAmt ? tokenAmt : toWithdraw; + SoloMarginContract solo = SoloMarginContract(getSoloAddress()); + solo.operate(getAccountArgs(), getActionsArgs(marketId, toWithdraw, false)); + if (erc20Addr == getAddressETH()) { + ERC20Interface wethContract = ERC20Interface(getAddressWETH()); + uint wethBal = wethContract.balanceOf(address(this)); + toWithdraw = toWithdraw < wethBal ? wethBal : toWithdraw; + setApproval(getAddressWETH(), toWithdraw, getAddressWETH()); + ERC20Interface(getAddressWETH()).withdraw(toWithdraw); + msg.sender.transfer(toWithdraw); + } else { + require(ERC20Interface(erc20Addr).transfer(msg.sender, toWithdraw), "Allowance or not enough bal"); + } + emit LogWithdraw(erc20Addr, toWithdraw, address(this)); + } + + /** + * @dev Borrow ETH/ERC20 + */ + function borrow(uint256 marketId, address erc20Addr, uint256 tokenAmt) public { + SoloMarginContract(getSoloAddress()).operate(getAccountArgs(), getActionsArgs(marketId, tokenAmt, false)); + if (erc20Addr == getAddressETH()) { + setApproval(getAddressWETH(), tokenAmt, getAddressWETH()); + ERC20Interface(getAddressWETH()).withdraw(tokenAmt); + msg.sender.transfer(tokenAmt); + } else { + require(ERC20Interface(erc20Addr).transfer(msg.sender, tokenAmt), "Allowance or not enough bal"); + } + emit LogBorrow(erc20Addr, tokenAmt, address(this)); + } + +} + + +contract InstaDydx is DydxResolver { + function() external payable {} +}