feat: Add token command to check any ERC20 balance, transfer ERC20

[Pratham-19]

Implementing

• Check any token balance
• Transfer any ERC20 token

1. Check balance

• Check any ERC20 token balance by default using the stored balance else can also provide address using
  rsk-cli token balance --contract <address> --address (optional) -t

• Added contract validation
  

2. Transfer token

in progress...

[chrisarevalodev]

Hey @Pratham-19!

I’m really impressed with your improvements to the CLI—they look fantastic. I have a few comments about your implementation that are critical to address before we can merge your PR.

I’ve already tested it, and it works well! However, there are some aspects of the implementation that don’t align with the existing CLI structure and the plans outlined for upcoming features in our backlog.

Specifically, you created a new program called token in the bin/index.ts file, where you can call both balance and transfer commands for custom tokens. While this is a great addition, there are already existing commands named balance and transfer. The goal is to update these commands so that users can execute them as follows:

• Balance Command: Run rsk-cli balance or rsk-cli balance --testnet. Using inquirer and ora, the CLI should prompt the user to choose between rBTC, RIF, USD RIF, DoC, or a custom token. If the user selects custom, the CLI should then ask for the contract address using inquirer.

• Transfer Command: Similarly, run rsk-cli transfer or rsk-cli transfer --testnet. Here too, the CLI should prompt the user to specify the token type (rBTC, RIF, etc.) or provide a contract address for custom tokens and also the amount to be transferred.

For reference, there is a very similar implementation using inquirer and ora in the contract command, which you may find helpful as a guide.

Thanks again for your hard work! You’re doing an amazing job. If you have any questions or need further clarification, feel free to reach out.

[Pratham-19]

Thanks for your comment @chrisarevalodev

I got the requirements, I'll revamp my code and add inquirer and ora for the same