Polkadot.js

Developer library for Web3 apps, smart contracts, wallets, and RPC. In a production build, Polkadot.js fits when the implementation needs a focused contract, SDK, test, or deployment layer.

用途：

• 构建类型化的区块链集成。
• 通过 RPC 提供程序读取链状态。
• 发送交易并调用智能合约。
• 编写脚本、后端程序和应用程序库。

最合适的：

Developers who want a clear tool in the contract, application, or deployment workflow.