feat: Multicall v2 (pancakeswap#1436)

* feat: Multicall v2

* refactor: Remove useless try/catch

src/config/abi/Multicall.json

@@ -1,54 +1,165 @@
 [
   {
-    "constant": true,
     "inputs": [
       {
         "components": [
-          {
-            "name": "target",
-            "type": "address"
-          },
-          {
-            "name": "callData",
-            "type": "bytes"
-          }
+          { "internalType": "address", "name": "target", "type": "address" },
+          { "internalType": "bytes", "name": "callData", "type": "bytes" }
         ],
+        "internalType": "struct Multicall2.Call[]",
         "name": "calls",
         "type": "tuple[]"
       }
     ],
     "name": "aggregate",
     "outputs": [
+      { "internalType": "uint256", "name": "blockNumber", "type": "uint256" },
+      { "internalType": "bytes[]", "name": "returnData", "type": "bytes[]" }
+    ],
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "inputs": [
       {
-        "name": "blockNumber",
-        "type": "uint256"
-      },
+        "components": [
+          { "internalType": "address", "name": "target", "type": "address" },
+          { "internalType": "bytes", "name": "callData", "type": "bytes" }
+        ],
+        "internalType": "struct Multicall2.Call[]",
+        "name": "calls",
+        "type": "tuple[]"
+      }
+    ],
+    "name": "blockAndAggregate",
+    "outputs": [
+      { "internalType": "uint256", "name": "blockNumber", "type": "uint256" },
+      { "internalType": "bytes32", "name": "blockHash", "type": "bytes32" },
       {
+        "components": [
+          { "internalType": "bool", "name": "success", "type": "bool" },
+          { "internalType": "bytes", "name": "returnData", "type": "bytes" }
+        ],
+        "internalType": "struct Multicall2.Result[]",
         "name": "returnData",
-        "type": "bytes[]"
+        "type": "tuple[]"
       }
     ],
-    "payable": false,
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "inputs": [{ "internalType": "uint256", "name": "blockNumber", "type": "uint256" }],
+    "name": "getBlockHash",
+    "outputs": [{ "internalType": "bytes32", "name": "blockHash", "type": "bytes32" }],
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "inputs": [],
+    "name": "getBlockNumber",
+    "outputs": [{ "internalType": "uint256", "name": "blockNumber", "type": "uint256" }],
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "inputs": [],
+    "name": "getCurrentBlockCoinbase",
+    "outputs": [{ "internalType": "address", "name": "coinbase", "type": "address" }],
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "inputs": [],
+    "name": "getCurrentBlockDifficulty",
+    "outputs": [{ "internalType": "uint256", "name": "difficulty", "type": "uint256" }],
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "inputs": [],
+    "name": "getCurrentBlockGasLimit",
+    "outputs": [{ "internalType": "uint256", "name": "gaslimit", "type": "uint256" }],
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "inputs": [],
+    "name": "getCurrentBlockTimestamp",
+    "outputs": [{ "internalType": "uint256", "name": "timestamp", "type": "uint256" }],
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "inputs": [{ "internalType": "address", "name": "addr", "type": "address" }],
+    "name": "getEthBalance",
+    "outputs": [{ "internalType": "uint256", "name": "balance", "type": "uint256" }],
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "inputs": [],
+    "name": "getLastBlockHash",
+    "outputs": [{ "internalType": "bytes32", "name": "blockHash", "type": "bytes32" }],
     "stateMutability": "view",
     "type": "function"
   },
   {
-    "constant": true,
     "inputs": [
+      { "internalType": "bool", "name": "requireSuccess", "type": "bool" },
       {
-        "name": "addr",
-        "type": "address"
+        "components": [
+          { "internalType": "address", "name": "target", "type": "address" },
+          { "internalType": "bytes", "name": "callData", "type": "bytes" }
+        ],
+        "internalType": "struct Multicall2.Call[]",
+        "name": "calls",
+        "type": "tuple[]"
       }
     ],
-    "name": "getEthBalance",
+    "name": "tryAggregate",
     "outputs": [
       {
-        "name": "balance",
-        "type": "uint256"
+        "components": [
+          { "internalType": "bool", "name": "success", "type": "bool" },
+          { "internalType": "bytes", "name": "returnData", "type": "bytes" }
+        ],
+        "internalType": "struct Multicall2.Result[]",
+        "name": "returnData",
+        "type": "tuple[]"
       }
     ],
-    "payable": false,
-    "stateMutability": "view",
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "inputs": [
+      { "internalType": "bool", "name": "requireSuccess", "type": "bool" },
+      {
+        "components": [
+          { "internalType": "address", "name": "target", "type": "address" },
+          { "internalType": "bytes", "name": "callData", "type": "bytes" }
+        ],
+        "internalType": "struct Multicall2.Call[]",
+        "name": "calls",
+        "type": "tuple[]"
+      }
+    ],
+    "name": "tryBlockAndAggregate",
+    "outputs": [
+      { "internalType": "uint256", "name": "blockNumber", "type": "uint256" },
+      { "internalType": "bytes32", "name": "blockHash", "type": "bytes32" },
+      {
+        "components": [
+          { "internalType": "bool", "name": "success", "type": "bool" },
+          { "internalType": "bytes", "name": "returnData", "type": "bytes" }
+        ],
+        "internalType": "struct Multicall2.Result[]",
+        "name": "returnData",
+        "type": "tuple[]"
+      }
+    ],
+    "stateMutability": "nonpayable",
     "type": "function"
   }
 ]

src/config/constants/contracts.ts

@@ -20,8 +20,8 @@ export default {
     56: '',
   },
   multiCall: {
-    56: '0x1ee38d535d541c55c9dae27b12edf090c608e6fb',
-    97: '0x67ADCB4dF3931b0C5Da724058ADC2174a9844412',
+    56: '0xfF6FD90A470Aaa0c1B8A54681746b07AcdFedc9B',
+    97: '',
   },
   pancakeProfile: {
     56: '0xDf4dBf6536201370F95e06A0F8a7a70fE40E388a',

src/utils/multicall.ts

@@ -22,4 +22,27 @@ const multicall = async (abi: any[], calls: Call[]) => {
   return res
 }
 
+/**
+ * Multicall V2 uses the new "tryAggregate" function. It is different in 2 ways
+ *
+ * 1. If "requireSuccess" is false multicall will not bail out if one of the calls fails
+ * 2. The return inclues a boolean whether the call was successful e.g. [wasSuccessfull, callResult]
+ */
+export const multicallv2 = async (abi: any[], calls: Call[], requireSuccess = true) => {
+  const web3 = getWeb3NoAccount()
+  const multi = new web3.eth.Contract(MultiCallAbi as unknown as AbiItem, getMulticallAddress())
+  const itf = new Interface(abi)
+
+  const calldata = calls.map((call) => [call.address.toLowerCase(), itf.encodeFunctionData(call.name, call.params)])
+  const returnData = await multi.methods.tryAggregate(requireSuccess, calldata).call()
+  const res = returnData.map((call, i) => {
+    const [result, data] = call
+    return {
+      result,
+      data: itf.decodeFunctionResult(calls[i].name, data),
+    }
+  })
+
+  return res
+}
 export default multicall