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Download offchain BSC, ETH and MATIC

(Almost all) ERC-20 token contracts do not maintain a list of iterable token holders, but you need to build a database offchain yourself. mapping in EVM is not iterable, you can only check for a known key value.

I have created a standalone tool which collects ERC-20 token holders and transactions to SQLite database and using [login to view URL] library.

Take a token contract address

Iterate over all Transfer events for token using eth_getLogs JSON-RPC API

Build a local database of these events

Allow you to use SQL to query any account balance on any point of time (block num)

You can find the command line application execution example how to build the token holder database here

The core Python logic is here.

There are some quirks here and there: for example detecting mint / creation event for some tokens is not straightforward. Thus, you will may negative balance on the account receiving initial total supply if you rely on Transfer event only.

Навыки: Python, Java, Программирование на С, Архитектура ПО, Программирование на C++

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О работодателе:
( 24 отзыв(-а, -ов) ) Toronto, Canada

ID проекта: #31499057

11 фрилансеров(-а) готовы выполнить эту работу в среднем за $545

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