Multicall web3js tuple encoding

web3js-tuple.js

const { Web3 } = require("web3");


async function multiCall() {
  const abi =
  {
    "stateMutability": "payable",
    "type": "function",
    "name": "aggregate3",
    "inputs": [
      {
        "components": [
          {
            "internalType": "address",
            "name": "target",
            "type": "address"
          },
          {
            "internalType": "bool",
            "name": "allowFailure",
            "type": "bool"
          },
          {
            "internalType": "bytes",
            "name": "callData",
            "type": "bytes"
          },
        ],
        "internalType": "struct Multicall3.Call3[]",
        "name": "calls",
        "type": "tuple[]"
      }
    ],
    "outputs": [
      {
        "components": [
          {
            "internalType": "bool",
            "name": "success",
            "type": "bool"
          },
          {
            "internalType": "bytes",
            "name": "returnData",
            "type": "bytes"
          }
        ],
        "internalType": "struct Multicall3.Result[]",
        "name": "returnData",
        "type": "tuple[]"
      }
    ],

  }

  const web3 = new Web3(`https://goerli.infura.io/v3/${key}`);

  const hello = web3.eth.abi.encodeFunctionCall({
    name: 'setGreeting',
    type: 'function',
    inputs: [{
      type: 'string',
      name: '_greeting'
    }]
  }, ['bonjour'])

  const greet = web3.eth.abi.encodeFunctionCall({
    name: 'greet',
    type: 'function'
  })

  const goodbye = web3.eth.abi.encodeFunctionCall({
    name: 'setGreeting',
    type: 'function',
    inputs: [{
      type: 'string',
      name: '_greeting'
    }]
  }, ['au revoir'])


  //
  const multiCall = web3.eth.abi.encodeFunctionCall(abi, [[
    { 'target': '0x8d9fBC02598e32C8d594bbEF4257846653ff4732', 'allowFailure': false, "callData": hello },
    { 'target': '0x8d9fBC02598e32C8d594bbEF4257846653ff4732', 'allowFailure': false, "callData": greet },
    { 'target': '0x8d9fBC02598e32C8d594bbEF4257846653ff4732', 'allowFailure': false, "callData": goodbye },
    { 'target': '0x8d9fBC02598e32C8d594bbEF4257846653ff4732', 'allowFailure': false, "callData": greet },
  ]])

  const hexString = await web3.eth.call({
    from: '0x673D2EBe4B6BAA946345C7b1F8d3Cc2FfB3429Bf',
    to: '0xcA11bde05977b3631167028862bE2a173976CA11',
    data: multiCall,
  })

  const multiCallResult = web3.eth.abi.decodeParameters(abi.outputs, hexString).returnData

  console.log(web3.eth.abi.decodeParameters([{"internalType":"string","name":"response","type":"string"}], multiCallResult[1].returnData).response)
  console.log(web3.eth.abi.decodeParameters([{"internalType":"string","name":"response","type":"string"}], multiCallResult[3].returnData).response)

}

async function estimateGas() {
  const web3 = new Web3(`https://goerli.infura.io/v3/${key}`);
  const hexString = await web3.eth.estimateGas({
    "from": "0x673D2EBe4B6BAA946345C7b1F8d3Cc2FfB3429Bf",
    "to": "0xebF43e1E2AA01651705764848D057AeC92a041FA",
    "value": 0,
    "data": "0xa41368620000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000000441484f5900000000000000000000000000000000000000000000000000000000",
    "nonce": 77
  })

  console.log(hexString);
}


// Call start
(async () => {

  multiCall()
})();