Crypto Wallet Integration

MetaMask, WalletConnect, TON Connect, Phantom, TronLink

CryptonisLabs will help integrate crypto wallet functionality into your project (website, application, or dApp platform) – from connection and authorization via Web3 wallets to secure transaction processing, token and NFT operations, and interaction with smart contracts.

Discuss the integration with our team and receive a personalized consultation on wallet connection, security, and the optimal architecture of your project. We will help you choose the best solution for your business goals and technical requirements.

Web3 Wallet Integration for Websites, Applications, and dApps

Modern Web3 products are moving away from traditional logins and passwords in favor of decentralized authorization via crypto wallets. NFT marketplaces, launchpad platforms, DeFi services, and Telegram mini-apps use wallets as the primary tool for user interaction with the product.

CryptonisLabs provides professional services for integrating crypto wallets into Web3 products of any scale. We connect popular wallets and protocols, configure secure transaction handling, and create a unified multi-wallet interface tailored to your project’s architecture.

Working with both EVM blockchains and non-EVM networks, our team ensures correct multichain integration without compromising security or UX.

Why Integrate Web3 Wallets into Your Product

Crypto wallet integration allows you to turn a website or application into a полноценный Web3 product and simplify the user journey.

Key benefits of integration:

• Passwordless authentication (Web3 Login)
  Users log in via a wallet, without email, usernames, or storing personal data.
• Receiving and sending crypto payments
  Payment for goods, services, NFTs, or subscriptions directly from the user’s wallet.
• Transaction signing and smart contract interaction
  All actions are confirmed by the user in the wallet and executed by the contract.
• NFT and token operations
  Mint, transfer, claim, stake, vote – via standard Web3 mechanisms.
• Increased user trust
  Users always control their funds and actions, increasing product transparency.

💡 Example:

The user connects MetaMask → confirms the transaction → the token is automatically credited by the smart contract.

Wallets We Integrate

MetaMask

The most popular Web3 wallet for Ethereum and EVM networks.

Supports browser extensions, mobile applications, and MetaMask SDK.

WalletConnect

A universal protocol for connecting hundreds of wallets (Trust Wallet, SafePal, Crypto.com Wallet, etc.) via QR code or deep link.

TON Connect

Official SDK for the TON ecosystem.

Integration of Tonkeeper, Telegram Wallet, and other TON wallets, including Telegram Mini-Apps.

Phantom

The main wallet for the Solana network with support for Ethereum and Polygon.

Used in NFT marketplaces, GameFi, and DeFi products.

TronLink

A popular wallet for the Tron network for working with TRC-20 tokens and smart contracts via TronWeb.

Coinbase Wallet / OKX Wallet

Integration of wallets from major CEX ecosystems for the convenience of centralized exchange users.

Key Use Cases

Web3 authentication (Login via Wallet)

User login via MetaMask, WalletConnect, or TON Connect without a username and password.

Crypto payments

Payment for goods, services, donations, and subscriptions directly from the wallet.

Token Sale / Launchpad

Connecting wallets to IDO/ICO platforms for purchasing tokens via smart contracts.

NFT Minting and Transfer

Transaction signing during NFT creation, purchase, and transfer.

DeFi, Staking, and DAO

Interaction with smart contracts for staking, farming, and voting.

Telegram Mini-Apps

Integration of TON Connect for Web3 payments and NFTs within Telegram.

What Crypto Wallet Integration Includes

Web3 wallet integration is not just a “Connect Wallet” button. It is a comprehensive technical implementation that ensures correct user authentication, secure transaction handling, and stable interaction with blockchain networks and smart contracts.

CryptonisLabs delivers crypto wallet integration as a complete functional module adapted to the architecture of a specific product.

1. SDK and API Integration

We connect and configure official SDKs and APIs of crypto wallets and protocols, ensuring correct interaction between the frontend and blockchain infrastructure.

Libraries and tools used:

• MetaMask SDK – wallet integration for Ethereum and EVM networks (browser, mobile).
• WalletConnect v2 – a universal protocol for connecting dozens of wallets via QR code and deep link.
• TON Connect JS – official SDK for connecting TON wallets, including Telegram Wallet and Tonkeeper.
• Phantom SDK – integration of the Solana wallet for NFT and DeFi scenarios.
• TronWeb – interaction with wallets and smart contracts on the Tron network.

Integration is performed taking into account the SDK version, network requirements, and product specifics (web, mobile, dApp, Telegram Mini-App).

2. Wallet Connection UI/UX Module

We design and configure the wallet connection interface with a focus on user convenience and transparency of all actions.

The interface is adapted for web, mobile, PWA, and Telegram Mini-Apps.

3. Session Management and Authentication

Integration is implemented without storing private keys or seed phrases on the server or client side.

We ensure:

• user authentication via message signing (Sign Message);
• secure session creation and storage;
• session lifetime control;
• automatic session refresh and revocation when the wallet is disconnected;
• protection against signature reuse.

This approach complies with Web3 security best practices.

4. Transaction Processing

A full transaction lifecycle is implemented – from initiation to confirmation on the blockchain.

Includes:

• transaction creation and submission;
• user signing via the wallet;
• status tracking (pending / confirmed / failed);
• proper handling of errors and failures;
• transaction logging for analytics and user support.

The integration takes into account the specifics of different networks (gas, fees, confirmations).

5. Network Switching and Support

Correct operation with multiple blockchain networks within a single product is configured.

Supports:

• automatic detection of the current network;
• verification that the network meets product requirements;
• requesting network switching in the user’s wallet;
• working with Ethereum, BNB Chain, Polygon, TON, Solana, Tron, and other networks;
• multichain logic without interface duplication.

6. Security Layer

Security is a key element of crypto wallet integration. Additional layers of protection are added on the frontend and backend sides.

Includes:

• message signing to confirm user actions;
• chainId verification to prevent operation on the wrong network;
• protection against network spoofing and malicious RPCs;
• validation of wallet and contract addresses;
• protection against replay attacks and signature reuse;
• use of secure HTTPS channels and Webhooks.

💡 Result:

You get a stable, secure, and scalable crypto wallet module that functions correctly in a multichain environment and is ready for use in commercial Web3 products.

Supported Blockchains

CryptonisLabs implements crypto wallet and Web3 functionality integration with leading blockchain networks, ensuring correct transaction processing, smart contract execution, and user operations across different ecosystems.

We work with both EVM-compatible blockchains and non-EVM networks, taking into account the specifics of their architecture, SDKs, and transaction signing mechanisms.

Supported networks:

Ethereum • BNB Chain • Polygon • Arbitrum • Avalanche • TON • Solana • Tron • Near • Aptos

• For EVM networks, we implement interaction with smart contracts in Solidity, support ERC-20 / ERC-721 / ERC-1155 standards, manage fees, and ensure correct transaction routing.
• For non-EVM blockchains (TON, Solana, Tron, Near, Aptos), we configure work with native SDKs, RPC nodes, and specific transaction and wallet logic.

📘 Multichain integration is available – a unified wallet connection and transaction management interface that allows your product to work with multiple blockchain networks simultaneously without duplicating business logic and UI.

Technologies and Architecture Used

Crypto wallet and Web3 functionality integration is built on a modern technology stack, taking into account security, scalability, and fault tolerance requirements.

Frontend Layer

The client side is implemented as a Web3 interface for web, mobile, and PWA applications:

• React / Next.js – used to build dApp interfaces with SSR support and loading optimization.
• Vue – applied in projects with custom business logic and complex user scenarios.
• Svelte – used for lightweight Web3 interfaces with minimal runtime and high performance.

SDKs and Web3 Libraries

Interaction with wallets and blockchains is implemented through official SDKs and proven Web3 libraries:

• MetaMask SDK – wallet integration for Ethereum and EVM networks (browser / mobile).
• WalletConnect v2 – protocol for connecting external wallets via QR codes and deep links.
• TON Connect 2.0 – official SDK for the TON ecosystem and Telegram Mini-Apps.
• Phantom SDK – interaction with wallets and programs on the Solana network.
• TronWeb – working with wallets and smart contracts on the Tron network.

Backend and Web3 Infrastructure

The server side is implemented as a service layer that ensures security, coordination of Web3 operations, and integration with the product’s business logic.

• Node.js / NestJS – used to build scalable APIs and services.
• Ethers.js / Web3.js – interaction with EVM blockchains and smart contracts.
• TonWeb – working with TON nodes and transactions.
• Solana Web3.js – interaction with Solana RPC and programs.

Security and Access Control

Security is implemented at multiple levels of the architecture:

• message signing to confirm wallet ownership;
• verification of chainId and transaction execution network;
• protection against RPC spoofing and malicious networks;
• validation of wallet and contract addresses;
• protection against replay attacks and signature reuse;
• secure HTTPS Webhooks for events and transactions;
• OAuth2-proxy for access control between services;
• rate limiting and basic API DDoS protection.

Operations and Scaling

Integration is designed with future load growth in mind:

• support for multichain architecture;
• isolation of Web3 logic from the business layer;
• ability to connect custom RPC nodes;
• horizontal scaling of backend services;
• readiness for high-load scenarios (NFT minting, token sales, DeFi).

Examples of Implemented Use Cases

Launchpad Platform

Integration of MetaMask and WalletConnect was implemented for user participation in token sales.

Wallet connection is used for Web3 authentication, transaction signing, and direct token purchases via smart contracts.

The integration includes network verification, transaction status tracking, and correct token crediting after blockchain confirmation.

NFT Marketplace

Web3 user authentication and NFT operations were implemented via Phantom and TON Connect.

NFT minting, token transfers, and transaction status display are supported.

The integration is adapted for non-EVM networks and ensures correct operation with native wallets and smart contracts.

Donation Platform

Crypto donation acceptance via MetaMask is configured.

Users connect their wallet, confirm the transaction, and send funds directly to a smart contract or specified address without payment intermediaries.

Transaction status processing and result display in the interface are implemented.

Telegram Mini-App

Integration of the TON Connect SDK for Web3 payments within the Telegram ecosystem is implemented.

Users authenticate via a TON wallet, confirm transactions, and pay for digital goods or services directly in the mini-app.

The integration takes into account the specifics of TON and Telegram Mini-Apps, including session handling and UX within the messenger.

Why Choose CryptonisLabs

• Expertise in EVM and non-EVM networks (TON, Solana, Tron).
• Proprietary Connect Wallet UI component library.
• Ability to integrate SDK or white-label wallets.
• Support for websites, dApps, PWA, and Telegram Mini-Apps.
• Secure architecture without storing private keys.

We build integrations that scale with your product and are ready for increasing load.

Planning to implement Web3 authentication and crypto payments on your website or application?

CryptonisLabs will help integrate MetaMask, WalletConnect, TON Connect, and other Web3 wallets into your product, taking into account security, architecture, and multichain support requirements.