Merge pull request #126 from Instadapp/feat/paraswap

[mainnet] added paraswap v5

contracts/avalanche/connectors/paraswap/helpers.sol

@@ -1,12 +1,11 @@
 pragma solidity ^0.7.0;
 
-import { DSMath } from "../../common/math.sol";
-import { Basic } from "../../common/basic.sol";
-import { TokenInterface } from "../../common/interfaces.sol";
-import { AugustusSwapperInterface } from "./interface.sol";
+import {DSMath} from "../../common/math.sol";
+import {Basic} from "../../common/basic.sol";
+import {TokenInterface} from "../../common/interfaces.sol";
+import {AugustusSwapperInterface} from "./interface.sol";
 
 abstract contract Helpers is DSMath, Basic {
-
     struct SwapData {
         TokenInterface sellToken;
         TokenInterface buyToken;
@@ -16,13 +15,23 @@ abstract contract Helpers is DSMath, Basic {
         bytes callData;
     }
 
-    address internal constant paraswap = 0xDEF171Fe48CF0115B1d80b88dc8eAB59176FEe57;
-
-    function _swapHelper(SwapData memory swapData, uint256 wavaxAmt) internal returns (uint256 buyAmt) {
+    address internal constant paraswap =
+        0xDEF171Fe48CF0115B1d80b88dc8eAB59176FEe57;
+        
+    function _swapHelper(SwapData memory swapData, uint256 wavaxAmt)
+        internal
+        returns (uint256 buyAmt)
+    {
         TokenInterface buyToken = swapData.buyToken;
-        (uint256 _buyDec, uint256 _sellDec) = getTokensDec(buyToken, swapData.sellToken);
+        (uint256 _buyDec, uint256 _sellDec) = getTokensDec(
+            buyToken,
+            swapData.sellToken
+        );
         uint256 _sellAmt18 = convertTo18(_sellDec, swapData._sellAmt);
-        uint256 _slippageAmt = convert18ToDec(_buyDec, wmul(swapData.unitAmt, _sellAmt18));
+        uint256 _slippageAmt = convert18ToDec(
+            _buyDec,
+            wmul(swapData.unitAmt, _sellAmt18)
+        );
 
         uint256 initalBal = getTokenBal(buyToken);
 
@@ -36,7 +45,10 @@ abstract contract Helpers is DSMath, Basic {
         require(_slippageAmt <= buyAmt, "Too much slippage");
     }
 
-    function _swap(SwapData memory swapData, uint256 setId) internal returns (SwapData memory) {
+    function _swap(SwapData memory swapData, uint256 setId)
+        internal
+        returns (SwapData memory)
+    {
         TokenInterface _sellAddr = swapData.sellToken;
 
         uint256 avaxAmt;
@@ -44,7 +56,8 @@ abstract contract Helpers is DSMath, Basic {
         if (address(_sellAddr) == avaxAddr) {
             avaxAmt = swapData._sellAmt;
         } else {
-            address tokenProxy = AugustusSwapperInterface(paraswap).getTokenTransferProxy();
+            address tokenProxy = AugustusSwapperInterface(paraswap)
+                .getTokenTransferProxy();
             approve(TokenInterface(_sellAddr), tokenProxy, swapData._sellAmt);
         }
 
@@ -54,4 +67,4 @@ abstract contract Helpers is DSMath, Basic {
 
         return swapData;
     }
-}
+}

contracts/mainnet/connectors/paraswap/events.sol

@@ -0,0 +1,11 @@
+pragma solidity ^0.7.0;
+
+contract Events {
+    event LogSwap(
+        address buyToken,
+        address sellToken,
+        uint256 buyAmt,
+        uint256 sellAmt,
+        uint256 setId
+    );
+}

contracts/mainnet/connectors/paraswap/helpers.sol

@@ -0,0 +1,70 @@
+pragma solidity ^0.7.0;
+
+import {DSMath} from "../../common/math.sol";
+import {Basic} from "../../common/basic.sol";
+import {TokenInterface} from "../../common/interfaces.sol";
+import {AugustusSwapperInterface} from "./interface.sol";
+
+abstract contract Helpers is DSMath, Basic {
+    struct SwapData {
+        TokenInterface sellToken;
+        TokenInterface buyToken;
+        uint256 _sellAmt;
+        uint256 _buyAmt;
+        uint256 unitAmt;
+        bytes callData;
+    }
+
+    address internal constant paraswap =
+        0xDEF171Fe48CF0115B1d80b88dc8eAB59176FEe57;
+
+    function _swapHelper(SwapData memory swapData, uint256 wethAmt)
+        internal
+        returns (uint256 buyAmt)
+    {
+        TokenInterface buyToken = swapData.buyToken;
+        (uint256 _buyDec, uint256 _sellDec) = getTokensDec(
+            buyToken,
+            swapData.sellToken
+        );
+        uint256 _sellAmt18 = convertTo18(_sellDec, swapData._sellAmt);
+        uint256 _slippageAmt = convert18ToDec(
+            _buyDec,
+            wmul(swapData.unitAmt, _sellAmt18)
+        );
+
+        uint256 initalBal = getTokenBal(buyToken);
+
+        (bool success, ) = paraswap.call{value: wethAmt}(swapData.callData);
+        if (!success) revert("paraswap-failed");
+
+        uint256 finalBal = getTokenBal(buyToken);
+
+        buyAmt = sub(finalBal, initalBal);
+
+        require(_slippageAmt <= buyAmt, "Too much slippage");
+    }
+
+    function _swap(SwapData memory swapData, uint256 setId)
+        internal
+        returns (SwapData memory)
+    {
+        TokenInterface _sellAddr = swapData.sellToken;
+
+        uint256 ethAmt;
+
+        if (address(_sellAddr) == ethAddr) {
+            ethAmt = swapData._sellAmt;
+        } else {
+            address tokenProxy = AugustusSwapperInterface(paraswap)
+                .getTokenTransferProxy();
+            approve(TokenInterface(_sellAddr), tokenProxy, swapData._sellAmt);
+        }
+
+        swapData._buyAmt = _swapHelper(swapData, ethAmt);
+
+        setUint(setId, swapData._buyAmt);
+
+        return swapData;
+    }
+}

contracts/mainnet/connectors/paraswap/interface.sol

@@ -0,0 +1,5 @@
+pragma solidity ^0.7.0;
+
+interface AugustusSwapperInterface {
+    function getTokenTransferProxy() external view returns (address);
+}

contracts/mainnet/connectors/paraswap/main.sol

@@ -0,0 +1,59 @@
+pragma solidity ^0.7.0;
+
+/**
+ * @title Paraswap.
+ * @dev DEX Aggregator.
+ */
+
+import {TokenInterface} from "../../common/interfaces.sol";
+import {Stores} from "../../common/stores.sol";
+import {Helpers} from "./helpers.sol";
+
+abstract contract ParaswapResolver is Helpers {
+    /**
+     * @dev Sell ETH/ERC20_Token using ParaSwap.
+     * @notice Swap tokens from exchanges like kyber, 0x etc, with calculation done off-chain.
+     * @param buyAddr The address of the token to buy.(For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
+     * @param sellAddr The address of the token to sell.(For ETH: 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE)
+     * @param sellAmt The amount of the token to sell.
+     * @param unitAmt The amount of buyAmt/sellAmt with slippage.
+     * @param callData Data from paraswap API.
+     * @param setId ID stores the amount of token brought.
+     */
+    function swap(
+        address buyAddr,
+        address sellAddr,
+        uint256 sellAmt,
+        uint256 unitAmt,
+        bytes calldata callData,
+        uint256 setId
+    )
+        external
+        payable
+        returns (string memory _eventName, bytes memory _eventParam)
+    {
+        Helpers.SwapData memory swapData = Helpers.SwapData({
+            buyToken: TokenInterface(buyAddr),
+            sellToken: TokenInterface(sellAddr),
+            unitAmt: unitAmt,
+            callData: callData,
+            _sellAmt: sellAmt,
+            _buyAmt: 0
+        });
+
+        swapData = _swap(swapData, setId);
+
+        _eventName = "LogSwap(address,address,uint256,uint256,uint256)";
+        _eventParam = abi.encode(
+            address(swapData.buyToken),
+            address(swapData.sellToken),
+            swapData._buyAmt,
+            swapData._sellAmt,
+            setId
+        );
+    }
+}
+
+contract ConnectV2ParaswapV5 is ParaswapResolver {
+    string public name = "Paraswap-v5";
+}

test/mainnet/paraswap/paraswap.test.ts

@@ -0,0 +1,177 @@
+import hre from "hardhat";
+import { expect } from "chai";
+import { abis } from "../../../scripts/constant/abis";
+import { addresses } from "../../../scripts/tests/mainnet/addresses";
+import { deployAndEnableConnector } from "../../../scripts/tests/deployAndEnableConnector";
+import { getMasterSigner } from "../../../scripts/tests/getMasterSigner";
+import { buildDSAv2 } from "../../../scripts/tests/buildDSAv2";
+import {
+  ConnectV2ParaswapV5__factory,
+} from "../../../typechain"
+import { parseEther } from "@ethersproject/units";
+import { encodeSpells } from "../../../scripts/tests/encodeSpells";
+import { tokens } from "../../../scripts/tests/mainnet/tokens";
+import { constants } from "../../../scripts/constant/constant";
+import { addLiquidity } from "../../../scripts/tests/addLiquidity";
+import BigNumber from "bignumber.js";
+import axios from "axios";
+const { web3, deployments, waffle, ethers } = hre;
+const { provider, deployContract } = waffle;
+describe("Paraswap", function() {
+  const connectorName = "paraswap-test";
+  let dsaWallet0: any;
+  let masterSigner: any;
+  let instaConnectorsV2: any;
+  let connector: any;
+  const wallets = provider.getWallets();
+  const [wallet0, wallet1, wallet2, wallet3] = wallets;
+  before(async () => {
+    await hre.network.provider.request({
+        method: "hardhat_reset",
+        params: [
+            {
+                forking: {
+                  // @ts-ignore
+                    jsonRpcUrl: hre.config.networks.hardhat.forking.url,
+                    // blockNumber: 13300000,
+                },
+            },
+        ],
+    });
+    masterSigner = await getMasterSigner();
+    const erc20 = abis.basic.erc20;
+    instaConnectorsV2 = await ethers.getContractAt(
+      abis.core.connectorsV2,
+      addresses.core.connectorsV2
+    );
+
+    connector = await deployAndEnableConnector({
+      connectorName,
+      contractArtifact: ConnectV2ParaswapV5__factory,
+      signer: masterSigner,
+      connectors: instaConnectorsV2,
+    });
+    // console.log("Connector address", connector.address);
+  });
+  it("Should have contracts deployed.", async function() {
+    expect(!!instaConnectorsV2.address).to.be.true;
+    expect(!!connector.address).to.be.true;
+    expect(!!masterSigner.address).to.be.true;
+  });
+  describe("DSA wallet setup", function() {
+    it("Should build DSA v2", async function() {
+      dsaWallet0 = await buildDSAv2(wallet0.address);
+      expect(!!dsaWallet0.address).to.be.true;
+    });
+    it("Deposit ETH into DSA wallet", async function() {
+      await wallet0.sendTransaction({
+        to: dsaWallet0.address,
+        value: ethers.utils.parseEther("10"),
+      });
+
+      expect(await ethers.provider.getBalance(dsaWallet0.address)).to.be.gte(
+        ethers.utils.parseEther("10")
+      );
+    });
+  });
+  describe("Main", function() {
+    it("should swap successfully", async function() {
+      async function getArg() {
+        const slippage = 1;
+        /* eth -> USDT */
+        const sellTokenAddress = "0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE"; // eth,  decimals 18
+        const sellTokenDecimals = 18;
+        const buyTokenAddress = "0xdac17f958d2ee523a2206206994597c13d831ec7"; // USDT, decimals 6
+        const buyTokenDecimals = 6;
+        const amount = 2;
+        const srcAmount = new BigNumber(amount)
+          .times(new BigNumber(10).pow(sellTokenDecimals))
+          .toFixed(0);
+        const fromAddress = dsaWallet0.address;
+        let url = `https://apiv5.paraswap.io/prices/`;
+        let params = {
+          srcToken: sellTokenAddress,
+          destToken: buyTokenAddress,
+          srcDecimals: sellTokenDecimals,
+          destDecimals: buyTokenDecimals,
+          amount: srcAmount,
+          side: "SELL",
+          network: 1,
+        };
+
+        const priceRoute = await axios
+          .get(url, { params: params })
+          .then((data) => data.data.priceRoute);
+
+        let buyTokenAmount = priceRoute.destAmount;
+        let minAmount = new BigNumber(priceRoute.destAmount)
+          .times(1 - slippage / 100)
+          .toFixed(0);
+
+        let txConfig = {
+          priceRoute: priceRoute,
+          srcToken: sellTokenAddress,
+          destToken: buyTokenAddress,
+          srcDecimals: sellTokenDecimals,
+          destDecimals: buyTokenDecimals,
+          srcAmount: srcAmount,
+          destAmount: minAmount,
+          userAddress: fromAddress,
+        };
+        let url2 = "https://apiv5.paraswap.io/transactions/1?ignoreChecks=true";
+        const calldata = await axios
+          .post(url2, txConfig)
+          .then((data) => data.data.data);
+
+        function caculateUnitAmt(
+          buyAmount: any,
+          sellAmount: any,
+          buyDecimal: any,
+          sellDecimal: any,
+          maxSlippage: any
+        ) {
+          let unitAmt: any;
+          unitAmt = new BigNumber(buyAmount)
+            .dividedBy(10 ** buyDecimal)
+            .dividedBy(new BigNumber(sellAmount).dividedBy(10 ** sellDecimal));
+          unitAmt = unitAmt.multipliedBy((100 - maxSlippage) / 100);
+          unitAmt = unitAmt.multipliedBy(1e18).toFixed(0);
+          return unitAmt;
+        }
+
+        let unitAmt = caculateUnitAmt(
+          buyTokenAmount,
+          srcAmount,
+          buyTokenDecimals,
+          sellTokenDecimals,
+          1
+        );
+
+        return [
+          buyTokenAddress,
+          sellTokenAddress,
+          srcAmount,
+          unitAmt,
+          calldata,
+          0,
+        ];
+      }
+      let arg = await getArg();
+      const spells = [
+        {
+          connector: connectorName,
+          method: "swap",
+          args: arg,
+        },
+      ];
+      const tx = await dsaWallet0
+        .connect(wallet0)
+        .cast(...encodeSpells(spells), wallet1.address);
+      const receipt = await tx.wait();
+
+      expect(await ethers.provider.getBalance(dsaWallet0.address)).to.be.lte(
+        ethers.utils.parseEther("8")
+      );
+    });
+  });
+});