Sequence V3 Backend Transaction Example

This project demonstrates how to control a Sequence V3 Smart Wallet using a standard Private Key (EOA) in a Node.js environment. It covers counterfactual address derivation, configuration publishing, and relaying transactions.

Prerequisites

• Node.js v18+
• A Project Access Key from Sequence Builder

⛽ Gas Fees & Sponsorship

This example is configured for Arbitrum Sepolia (Testnet).

You do not need Testnet ETH. The Sequence Relayer automatically sponsors gas fees on testnets, so you can run this script immediately without funding the Smart Wallet.

Setup

1. Install dependencies:

   npm install

2. Configure Environment: Copy the example file and fill in your details.

   cp .env.example .env

   Required .env variables:

   • PROJECT_ACCESS_KEY: From Sequence Builder.
   • PRIVATE_KEY: Your EOA private key (starts with 0x...).
   • TARGET_ADDRESS: Where you want to send the transaction.
   • CHAIN_ID: 421614 (Arbitrum Sepolia).
   • NODE_URL: https://nodes.sequence.app/arbitrum-sepolia
   • RELAYER_URL: https://arbitrum-sepolia-relayer.sequence.app
   • EXPLORER_URL: https://sepolia.arbiscan.io

Usage

Run the script:

npm run dev