Aggregate eth_calls Vs single call

This make use of multicall contract (https://github.com/makerdao/multicall)

Chart here: https://live.amcharts.com/mEyZD/

Number of eth_Call	Aggregate call (Time in milliseconds)	Single call (Time in milliseconds)	Comment
1	650.3	611.8	Single is faster
2	276.1	1880.4	Aggregate is faster
3	759.9	1484.9	Aggregate is faster
4	592.0	1583.2	Aggregate is faster
5	613.2	1822.2	Aggregate is faster
6	1225.1	2967.0	Aggregate is faster
7	931.9	2871.9	Aggregate is faster

From the demo, one can deduce that

• Time taken depend on network/internet speed and machine
• If the number of call is 1, single call maybe faster
• The more the number of calls the higher the time taken for a single call to complete while aggregate call stays relatively below 1 seconds on average.

How to use

1.

Using the file utils/ethCall.js

import {aggregateCalls} from "../utils/ethCalls";
// `aggregateCalls` takes an array of object of calls 

let abi = require("abi.json");
let contractAddress = "0x738cb...";

let callsSample = [
    {
        contractAbi: abi /* Abi of the contract your're interacting with */,
        contractAddress: contractAddress /* contract address */,
        contractMethod: "totalSupply" /* The method of the contract */,
        methodArgs: [] /* array of parameter of the contract method. It can be omitted if no arg is required */
    },
    {
         contractAbi: abi /* or another contract ABI */,
         contractAddress: contractAddress /* could be another contract address different from callsSample[0] */,
         contractMethod: "balanceOf" /* requires a parameter (address) */, 
         methodArgs: ["0x128383abcd..."] /* balanceOf which address? */

    },
    ...
];

// use callsSample 

makeCall(callsSample);

async function makeCall(callsProp) {
    let result = await aggregateCalls(callsProp);
    console.log(result);
    /* 
        {
        0: "9342397", /* block number */
        1: [ /* result of methods in order of callsSample*/
            "0x00000000000004602913d0701e0",
            "0x000000000000de0b6b3a7640000"
            ]
        }
    */
} 

2. Run locally

• Clone this repo
• Run npm install
• Update utils/sampleCalls.js (add or remove method in the calls function)
• Do not forget to import the ABI .json file of the contract you will be interacting with. erc20Abiis already provided for convenience.