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Quick, practical guide for integrating wallets, SDKs and best practices

1. Why this guide?

Purpose

This presentation is a compact, practical walkthrough to help developers integrate Trust Wallet and other Web3 tools into apps and services. It focuses on concrete steps: environment setup, SDK choices, security patterns, testing and deployment.

Who this is for

Frontend and backend engineers, product managers, and blockchain developers who want an actionable on-ramp for wallet integration and secure transaction flows.

2. Quick prerequisites

Basic JavaScript/TypeScript experience
Node.js (LTS) and a package manager (npm/yarn)
Understanding of accounts, signatures and gas (blockchain basics)
A testnet account or faucet funds for experimentation

Local setup (example)

$ node -v $ npm init -y $ npm i ethers web3 web3modal walletconnect

3. Choose the right integration path

Embedded / Mobile-first

If you are building a mobile app, use deep links or Trust Wallet SDKs designed for mobile. WalletConnect provides a standard bridge between mobile wallets and dApps.

Web / Desktop dApp

For web dApps, integrate Web3Modal, Ethers.js, or Web3.js and present the user with a wallet selection experience. Prioritise non-custodial flows and explicit signature prompts.

4. Key libraries and SDKs

WalletConnect

Standard for connecting mobile wallets to web dApps. Works well with Trust Wallet and many others.

Ethers.js / Web3.js

Lightweight and battle-tested JavaScript libraries for interacting with Ethereum-compatible chains. Use Ethers.js for a modern developer experience.

Trust Wallet Core

Native library (C++) used by Trust Wallet for signing and key management. Useful for building wallet features or for deep integration in mobile native apps.

5. Basic integration example (Web)

Connect and request accounts

import { ethers } from 'ethers' async function connect() { if (window.ethereum) { await window.ethereum.request({ method: 'eth_requestAccounts' }) const provider = new ethers.providers.Web3Provider(window.ethereum) const signer = provider.getSigner() const address = await signer.getAddress() return { provider, signer, address } } else { throw new Error('No injected wallet found') } }

Notes

Always show clear UI explaining what the wallet will do (e.g., sign a message, send a transaction). Avoid unexpected prompts.

6. Security & UX best practices

Never transmit private keys

Private keys must remain in the user's wallet — never on your server. Use signed messages and on-chain transactions to prove intent.

Explain gas and transaction lifecycle

Make gas estimations visible and explain that transactions might fail or be pending. Provide a clear retry and cancellation flow when appropriate.

Anti-phishing tips

Use HTTPS and certificate pinning where possible
Display transaction details (to/from, amount, data) before signing
Encourage users to verify destination addresses on their device

7. Testing and staging

Use testnets

Test on Goerli, Sepolia, or other relevant testnets. Use faucet funds and simulate edge cases: low gas, nonce errors, chain reorgs.

Automated tests

Write unit tests for contract interactions and integration tests for end-to-end flows (e.g., wallet connect -> sign -> broadcast).

8. Deployment checklist

Lock down CORS and backend APIs
Ensure environment variables do not contain private keys (use a secrets manager)
Provide clear recovery and support documentation for users

Monitoring

Track failed transactions, signature errors, and wallet connection failures. Capture user agent and device data for debugging (without storing sensitive account data).

9. Community & support

Join developer forums, GitHub repos and Discord/Telegram channels for Trust Wallet and WalletConnect. Report bugs with reproducible steps and include logs (non-sensitive).

10. Quick reference links

Trust Wallet — Official Trust Developers (Docs) Trust Wallet on GitHub Wallet Core WalletConnect Web3.js Docs Ethers.js Docs MetaMask (Wallet example) BNB Chain Docs Ethereum — Developers