Feature: Historical sync of tokens before the fork

[jxom]

The Request

The ability to (already) see all of an account's ERC20 tokens when a forked instance has been set up.

Problem

Right now, when we set up a forked instance of an Anvil node, and import an account that holds ERC20 balances, we cannot see those tokens in the ERC20 token list until we import them.

Solution

As a user, when I spin up a forked instance and import my account (which has some ERC20 tokens) into Rivet, then I would expect to see them already in my token list instead of importing each one.

Notes

Should we just do pagination on eth_getLogs (viem's getLogs action) on the RPC Provider? Or should we use an external indexer to find all Transfer events against an account address?

[b4s36t4]

https://viem.sh/docs/actions/public/getFilterLogs.html we can use this to get the events which are Transfer right?

[jxom]

@b4s36t4, yes but maybe https://viem.sh/docs/actions/public/getLogs.html#getlogs will be better

[b4s36t4]

Yep, I think we can scope the events in getlogs too. So pagination or using external indexer? like etherscan? These providers do have indexed all ERC20 tokens for a specific address.

https://docs.etherscan.io/api-endpoints/accounts#get-a-list-of-erc20-token-transfer-events-by-address