How to call operations with FT4 authentication

This recipe demonstrates how to call dapp operations that require FT4 authentication using a Web3 provider (e.g., MetaMask). This is essential for interacting with custom dapp operations that need authenticated user accounts.

JS/TS client

Prerequisites

• Node.js
• Web3 provider (e.g., MetaMask browser extension)
• FT4 client: npm install @chromia/ft4
• Postchain client: npm install postchain-client

Demo script

• Call operation with FT4 auth demo

Key Features

This recipe includes examples for:

• Web3 integration - Using injected Web3 providers like MetaMask for key management
• FT4 authentication - Creating authenticated sessions for operation calls
• Custom operations - Calling arbitrary dapp operations that require user authentication
• Session management - Handling FT4 session creation and operation execution

Authentication Flow

The recipe demonstrates this flow:

1. Connect to Web3 provider - Uses createWeb3ProviderEvmKeyStore to integrate with MetaMask
2. Get FT4 accounts - Retrieves accounts associated with the Web3 provider
3. Create session - Establishes an authenticated FT4 session
4. Call operations - Executes custom dapp operations with proper authentication

Learn more

• FT4 client documentation — covers account management and FT4 operations.
• Account management — understanding FT4 accounts and authentication.
• JavaScript/TypeScript client — covers setup, connection, and usage patterns.