feat(base-token): automatic fetching

[fborello-lambda]

What ❔

Provide a way to track the Base and ETH tokens.

Why ❔

Maybe the blockExplorerApi is not set and the tokens are not specified in the config file, so if everything fails, ask the RPC for the main tokens.

How to Reproduce ❔

I've created a hyperchain with basetoken, then npm run hyperchain:create and finally: npm run dev:node:hyperchain

Note

I also have a block explorer running but the api is not working, what's the solution for this? or how can i test it out?

If i do:

curl -X 'GET' \
  'http://block-explorer:3020/tokens?page=1&limit=10&minLiquidity=0' \
  -H 'accept: application/json'

I get:

{
  "items": [],
  "meta": {
    "totalItems": 0,
    "itemCount": 0,
    "itemsPerPage": 10,
    "totalPages": 0,
    "currentPage": 1
  },
  "links": {
    "first": "tokens?limit=10&minLiquidity=0",
    "previous": "",
    "next": "",
    "last": ""
  }
}

It doesn't even return the base-token address

I've seen that the mainnet blockExplorerApi doesn't even have this method. How are extra tokens managed? By just looking at the code, seems that the tokens are manually predefined is that the case?