Token Balances

[bh2smith]

This is a self-hosted approach to fetching token balances for a given account address across many chains.

It retrieves balances by making (simultaneous) direct rpc calls to token.balanceOf(account) for a fixed tokenList.

Some drawbacks here are

• [maintenance] having a fixed token list. However, there are several publicly available token lists here: https://tokenlists.org/ so we don't need to maintain our own fixed list.
• [scalability] if the token list is too large, we will be limited by the node provider to too many simultaneous requests.

Alternative options:

There are services that offer token balances. For example

• Covalent: https://www.npmjs.com/package/@covalenthq/client-sdk
• TokenBalance (seems SUPER old -- only mainnet): website & (github)
• Alchemy API: Tried it for one account on mainnet like so:

curl --request POST \
     --url https://eth-mainnet.g.alchemy.com/v2/$ALCHEMY_KEY \
     --header 'accept: application/json' \
     --header 'content-type: application/json' \
     --data '{"id": 1,"jsonrpc": "2.0","method": "alchemy_getTokenBalances","params": ["0x7f01D9b227593E033bf8d6FC86e634d27aa85568"]}'

it returned a page key and the docs are unclear on how to get the next page.

• QuickNode

curl https://docs-demo.quiknode.pro/ \
  -X POST \
  -H "Content-Type: application/json" \
  --data '{
    "id":67,
    "jsonrpc":"2.0",
    "method":"qn_getWalletTokenBalance",
    "params": [{
      "wallet": "0xd8da6bf26964af9d7eed9e03e53415d37aa96045",
      "page": 2
    }]
  }'

cc @SurgeCode