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Bulk fetching historical ERC20 token balances for wallets

Etherum Reddit

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If you’re a dev doing on-chain wallet analysis: I wrote a guide on bulk fetching token balances for multiple wallets and across different time periods.

When I first started working with Ethereum data I found it surprisingly difficult to figure out how to do this - especially in a way that was cost effective (didn’t burn through all my API credits).

It honestly took me forever to find the best method. So I decided I wanted to write a guide about it. You can find it here: https://medium.com/coinmonks/the-best-method-for-bulk-fetching-erc20-token-balances-99da12f4d839

Fetching token balances is a common task but super tricky to get right. In this article I go over the different approaches and share the best one.

EDIT: Fixed broken link

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