Hello Folks,

So in this session we will be discussing about checksum addresses and to convert any ethereum address to checksum address using web3 from nodejs.

To do that we need to have web3 Node module installed on our system.

We can do this by running the following code on the cmd

npm install web3

Then let's run our node server. Just run the following code on cmd.

node

Then we need web3 module in our server so run the following code

var Web3 = require('web3')

we will be needing a Blockchain network to create an account  so get an rpc url from here

Just click on the link -> Login to your account ->Click on ethereum on left side bar ->create project ->settings->keys->endpoints 

and choose your respective testnet rpc url

rpc url it will look like this - https://kovan.infura.io/v3/your_api_key

 var url = 'your RPC url here'

Then run this one

var web3 = new Web3(url)

Our Ethereum address, as well as every other Ethereum address in existence, has two versions - one that includes uppercase letters and one that doesn’t. These are called the checksummed and non-checksummed version. Here’s an example of the same address as a:

• Non-checksummed version: 0x12ae66cdc592e10b60f9097a7b0d3c59fce29876
• Checksummed version: 0x12AE66CDc592e10B60f9097a7b0D3C59fce29876

Checksummed addresses contain both uppercase and lowercase letters whereas the non-checksummed addresses contain either uppercase letters or lowercase letters

To convert an upper or lowercase Ethereum address to a checksum address.

we can use the following utility function

web3.utils.toChecksumAddress('your address here')

This will return the checksum version of the given address.

To check whether the given address is checksummed or not we can use this utility function

web3.utils.checkAddressChecksum('your address here')

This will return false if the given address is non-checked address.

So that's all for today's session.

For test ethers and link tokens. Click Here

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!!!!!HAPPY LEARNING!!!!