What is Starknet.js ?

Starknet.js is a library that helps to connect your website or your Decentralized Application (DAPP) to the blockchain-based Starknet network, using JavaScript / TypeScript language.

Overview

Some important topics that have to be understood:

• You can connect your DAPP to several networks:

  • Starknet mainnet (Layer 2 of Ethereum network ).
  • Starknet testnet (Layer 2 of Sepolia network (testnet of Ethereum)).
  • Starknet-devnet (your local Starknet network, for developers).

  and also to some more specific solutions:

  • private customized version of Starknet.
  • local Starknet node (connected to mainnet or testnet).

Understanding what Starknet is and how it works is necessary. Then, you can learn how to interact with it using Starknet.js. So, at this stage, you should be aware of the content of the Starknet official doc and the Starknet Book.

• Only the RpcProvider object communicates directly with the network; your DAPP will mainly interact with Account and Contract objects. You will define with the RpcProvider with which network you want to work. You can use the provider to access some low-level data from the network (block, timestamp, ...).
• Signer and Utils objects contain many useful functions for interaction with Starknet.js.
• The Contract object is mainly used to read the memory of a blockchain contract.
• The Account object is the most useful:
  • as a wallet, to store your tokens.
  • as a way to pay the fees to the network, and to be able to write in its memory.