How to securely sign transactions with eosjs in a production environment?

Avoid the JsSignatureProvider and integrate with secure external solutions like hardware wallets or server-side key management systems, as the README warns it's for development only. This requires additional setup and security audits.

eosjs vs ethers.js for blockchain development?

eosjs is specifically for EOSIO blockchains, while ethers.js targets Ethereum; choose eosjs if you're building on EOSIO, but for multi-chain projects, you'll need separate libraries or a more generic solution.

How to set up eosjs with TypeScript in a Node.js project?

Install eosjs and @types/text-encoding as dev dependencies, then update your tsconfig.json to include the 'dom' lib, as detailed in the README. This ensures proper type definitions and avoids compilation errors.

Can eosjs be used with React for building dApp frontends?

Yes, but you must handle the browser build step or use a bundler like webpack, and implement secure signing outside the client, such as through wallet integrations, to prevent key exposure.

How does eosjs handle RPC errors when transactions fail?

It provides an RpcError class for structured error handling; catch exceptions and use JSON.stringify on e.json to get detailed error information, as shown in the Error Handling example for debugging.

What are the alternatives to eosjs for EOSIO development?

Community libraries like eosjs-ng or direct RPC calls exist, but eosjs is the official option with comprehensive features and documentation. Evaluate based on your project's needs for stability and support.

eosjs — JavaScript Library for EOSIO

What is eosjs?

eosjs is a JavaScript library that provides an API for interacting with EOSIO-based blockchains. It allows developers to send transactions, query blockchain data, and integrate EOSIO functionality into web and Node.js applications by leveraging the EOSIO RPC API.

Target Audience

Developers building decentralized applications (dApps) or tools on EOSIO blockchains, including those working with web frontends, Node.js backends, or TypeScript projects.

Value Proposition

eosjs offers a standardized and well-documented interface for EOSIO blockchain interactions, reducing the complexity of direct RPC calls and providing built-in support for transaction signing, error handling, and cross-environment compatibility.

Overview

General purpose library for the EOSIO blockchain.

Use Cases

Best For

Building web-based dApps that interact with EOSIO blockchains
Creating Node.js scripts for automating blockchain transactions
Developing wallet interfaces or blockchain explorers for EOSIO
Integrating EOSIO smart contract functionality into JavaScript applications
Prototyping EOSIO applications with TypeScript for type safety
Connecting to EOSIO testnets or mainnets via JSON-RPC endpoints

Not Ideal For

Projects targeting non-EOSIO blockchains like Ethereum or Solana
Applications needing out-of-the-box, secure key management for production without custom integration
Teams looking for a lightweight library solely for read-only blockchain queries without transaction capabilities
Developers wanting pre-built UI components for dApp interfaces without additional frontend work

Pros & Cons

Pros

Cross-Environment Support

Works seamlessly in both browser and Node.js, with clear examples for ES Modules and CommonJS imports, as shown in the README's import sections.

TypeScript Integration

Includes TypeScript definitions and detailed setup instructions, such as adding the 'dom' lib for Node.js, ensuring type-safe development.

Comprehensive Transaction API

Provides a full-featured transact() method for signing and broadcasting transactions, with configurable TAPOS fields like blocksBehind and expireSeconds.

Structured Error Handling

Uses RpcError for managing RPC-related exceptions, allowing developers to catch and parse errors with JSON.stringify, as demonstrated in the Error Handling section.

Cons

Insecure Default Signing

The built-in JsSignatureProvider is explicitly for development only, forcing developers to implement external secure vaults for production, adding significant complexity.

Browser Build Overhead

Requires running 'yarn build-web' to generate browser distributions manually, unlike libraries that offer direct CDN links or simpler npm setups for immediate use.

Node.js Dependency Bloat

Needs additional packages like node-fetch and util for TextEncoder/Decoder in Node.js, which increases bundle size and complicates initial configuration.

eosjs

What is eosjs?

Overview

Use Cases

Best For

Not Ideal For

Pros & Cons

Pros

Cons

Frequently Asked Questions

Related Projects

Found a gem we're missing?

eosjs

What is eosjs?

Overview

Use Cases

Best For

Not Ideal For

Pros & Cons

Pros

Cons

Frequently Asked Questions

Related Projects

Found a gem we're missing?