Developing a cryptocurrency wallet is a fantastic way to deepen your understanding of Web3 and blockchain interactions. This guide documents the development journey of a functional Ethereum wallet named "Beaver Wallet," covering its core features, technical stack, and implementation progress.
Core Features of the Beaver ETH Wallet
A robust self-custody wallet requires several fundamental components to securely manage assets and interact with the decentralized web.
- Multi-Account Management: Users can create new wallets or import existing ones using private keys or seed phrases.
- Balance and Transaction History: Fetches and displays the user's ETH balance with fiat currency conversion and a full transaction history log.
- ETH Transfers: Enables users to send ETH to any valid Ethereum address.
- WalletConnect Integration: Allows the wallet to seamlessly connect with and interact with thousands of decentralized applications (dapps).
Chosen Technology Stack
Selecting the right tools is crucial for performance and developer experience.
- React Native: This framework was chosen for cross-platform development, allowing the wallet to be built for both iOS and Android from a single codebase. It provides a near-native user experience.
- Ethers.js: A complete and compact library for interacting with the Ethereum Blockchain. It is used for all core operations, including creating wallets, making transactions, and reading data from the blockchain.
Development Progress and Status
The project follows an iterative approach, focusing on core functionality first before expanding to additional features.
✅ Completed Features
- Wallet creation and management
- Switching between different Ethereum networks (Mainnet, Testnets)
- Sending ETH transfers
- Importing wallets via private key or seed phrase
- Integration of exchange rate API for balance conversion
- Full WalletConnect V2 protocol support (Sign & Auth)
🚧 Features In Progress
- Multi-language (i18n) support
- Dark/Night mode theme
- Enhanced Ethereum API queries for balances and transactions
📋 Planned Compatibility
- Backward compatibility with WalletConnect V1 protocol
A Closer Look at Key Functions
The Home Screen
The home screen provides a clear overview of the user's primary account. It displays the total portfolio value, converted to a chosen fiat currency, and shows the latest transaction activity for quick reference.
Adding a New Wallet
Users can easily generate a new wallet, which creates a new seed phrase. The interface emphasizes critical security steps, instructing users to write down and securely store their recovery phrase offline.
Managing Transfers
The transfer function is designed for clarity and safety. Users input a recipient address and amount, with the interface showing estimated network gas fees before the user confirms and signs the transaction.
Viewing Transaction History
This section provides a detailed, chronological list of all incoming and outgoing transactions. Each entry includes the transaction hash, amount, date, and status (confirmed/pending), fetched directly from the blockchain. 👉 Explore more strategies for on-chain data analysis
Implementing WalletConnect V2
Integrating WalletConnect V2 was a major milestone. This protocol allows the wallet to establish a secure, remote connection between a user's wallet and a dapp using a QR code or deep link.
- Session Establishment: The wallet scans a QR code provided by a dapp to initiate a pairing request.
Request Handling: Once a session is active, the wallet can receive and respond to various signature requests from the dapp, including:
- Personal Sign requests (for logging in or verifying ownership)
- ETH Transfer requests
- Sign Typed Data v4 requests (common for NFT marketplaces and DeFi protocols)
This functionality transforms the wallet from a simple asset holder into a key management tool for the entire Web3 ecosystem.
Frequently Asked Questions
What is the main benefit of building your own wallet?
Developing a wallet provides deep, hands-on experience with core Web3 concepts like key management, transaction signing, and blockchain interaction. This knowledge is directly transferable to building complex dapps.
Is it safe to use a self-built wallet?
While excellent for learning, any new wallet software should be used with extreme caution. Always start with small, insignificant amounts of crypto and never store large sums in a wallet that is still under active development and unaudited.
What's the difference between WalletConnect V1 and V2?
V2 is a complete rewrite offering significant improvements, including a multi-chain architecture, better session management, and a more efficient relay network. While V1 is still used by some dapps, V2 is the current standard.
Can this wallet hold NFTs and other tokens?
The current focus is on core ETH functionality. However, because the wallet manages an Ethereum address, it can receive any ETH-based asset (like ERC-20 tokens or ERC-721 NFTs). Displaying and interacting with these assets would require additional development.
Do I need a full Ethereum node to build this?
No. While you can use a node you operate, libraries like Ethers.js allow you to interact with the blockchain by connecting to remote node providers via APIs, which is much simpler for development.
What are the biggest challenges in wallet development?
Security is paramount. Safely handling private keys and seed phrases on a device is the greatest challenge. User experience is also critical; simplifying complex blockchain actions into an intuitive interface is a significant design task. 👉 Get advanced methods for secure key management