Merge pull request #86 from Instadapp/weth-arbitrum-deployment

[Arbitrum] WETH connector

contracts/arbitrum/connectors/weth/events.sol

@@ -0,0 +1,6 @@
+pragma solidity ^0.7.0;
+
+contract Events {
+    event LogDeposit(uint256 tokenAmt, uint256 getId, uint256 setId);
+    event LogWithdraw(uint256 tokenAmt, uint256 getId, uint256 setId);
+}

contracts/arbitrum/connectors/weth/helpers.sol

@@ -0,0 +1,8 @@
+pragma solidity ^0.7.0;
+
+import { TokenInterface } from "../../common/interfaces.sol";
+
+
+abstract contract Helpers  {
+    TokenInterface constant internal wethContract = TokenInterface(0x82aF49447D8a07e3bd95BD0d56f35241523fBab1);
+}

contracts/arbitrum/connectors/weth/main.sol

@@ -0,0 +1,65 @@
+pragma solidity ^0.7.0;
+
+/**
+ * @title WETH.
+ * @dev Wrap and Unwrap WETH.
+ */
+
+import { DSMath } from "../../common/math.sol";
+import { Basic } from "../../common/basic.sol";
+import { Events } from "./events.sol";
+import { Helpers } from "./helpers.sol";
+
+abstract contract Resolver is Events, DSMath, Basic, Helpers {
+
+    /**
+     * @dev Deposit ETH into WETH.
+     * @notice Wrap ETH into WETH
+     * @param amt The amount of ETH to deposit. (For max: `uint256(-1)`)
+     * @param getId ID to retrieve amt.
+     * @param setId ID stores the amount of ETH deposited.
+     */
+    function deposit(
+        uint256 amt,
+        uint256 getId,
+        uint256 setId
+    ) public payable returns (string memory _eventName, bytes memory _eventParam) {
+        uint _amt = getUint(getId, amt);
+
+        _amt = _amt == uint(-1) ? address(this).balance : _amt;
+        wethContract.deposit{value: _amt}();
+        
+        setUint(setId, _amt);
+
+        _eventName = "LogDeposit(uint256,uint256,uint256)";
+        _eventParam = abi.encode(_amt, getId, setId);
+    }
+
+    /**
+     * @dev Withdraw ETH from WETH from Smart  Account
+     * @notice Unwrap ETH from WETH
+     * @param amt The amount of weth to withdraw. (For max: `uint256(-1)`)
+     * @param getId ID to retrieve amt.
+     * @param setId ID stores the amount of ETH withdrawn.
+     */
+    function withdraw(
+        uint amt,
+        uint getId,
+        uint setId
+    ) public payable returns (string memory _eventName, bytes memory _eventParam) {
+        uint _amt = getUint(getId, amt);
+
+        _amt = _amt == uint(-1) ? wethContract.balanceOf(address(this)) : _amt;
+        approve(wethContract, wethAddr, _amt);
+        wethContract.withdraw(_amt);
+
+        setUint(setId, _amt);
+
+        _eventName = "LogWithdraw(uint256,uint256,uint256)";
+        _eventParam = abi.encode(_amt, getId, setId);
+    }
+}
+
+contract ConnectV2WETHArbitrum is Resolver {
+    string constant public name = "WETH-v1.0";
+}

docs/connectors.json

@@ -45,7 +45,8 @@
       "BASIC-B": "0xa9b99766e6c676cf1975c0d3166f96c0848ff5ad",
       "BASIC-C": "0x839c2d3ade63df5b0b8f3e57d5e145057ab41556",
       "UNISWAP-V3-A": "0x3254Ce8f5b1c82431B8f21Df01918342215825C2",
-      "1INCH-A": "0xA4BF319968986D2352FA1c550D781bBFCCE3FcaB"
+      "1INCH-A": "0xA4BF319968986D2352FA1c550D781bBFCCE3FcaB",
+      "WETH-A": "0x6C7256cf7C003dD85683339F75DdE9971f98f2FD"
     }
   },
   "mappings": {