This repository contains code examples to obtain balances from multiple ERC20 tokens for a blockchain wallet.
Check out the article in the Chainstack blog for a complete description of how to query balances.
The cli-app folder contains an app that can be used to query token balances from different blockchain protocols from the command line. Supported blockchains are: Ethereum, Binance Smart Chain, Avalanche and Polygon.
This application requires Node.js v15
This app requires access to blockchain archive nodes via RPC. Sign up with Chainstack to get access to multiple blockchain protocols.
In addition, it uses the APIs from Etherscan, Snowtrace, BscScan and PolygonScan so API keys for all those are also requred.
Note: not all API keys are mandatory, just the ones from the blockchain protocol you'd use.
Both archive nodes endpoints and API keys must be configured in an .env file. Just enter the values in the .env.example file and rename it to .env.
ETH_ARCHIVE_NODE=
BNB_ARCHIVE_NODE=
AVA_ARCHIVE_NODE=
POLY_ARCHIVE_NODE=
ETHERSCAN_API_KEY=
SNOWTRACE_API_KEY=
BSCSCAN_API_KEY=
POLYSCAN_API_KEY=
Install all dependencies with npm i. Start the CLI program with node index.js