Features

Safe Smart Accounts integrates Safe Smart Accounts (formerly Gnosis Safe) into Drupal, enabling users to deploy and manage multi-signature Ethereum wallets directly from their Drupal user profiles.

Basic Functionality

Deploy Safe Smart Accounts: Users can deploy their own Safe accounts to Sepolia testnet (or mainnet) with custom signer configurations and threshold requirements
Multi-Signature Management: Create transactions that require multiple signatures before execution, ideal for shared treasuries and collaborative fund management
Transaction Workflow: Full transaction lifecycle from creation through signature collection to on-chain execution, all within Drupal's UI
Signer Management: Add or remove signers and adjust signature thresholds through on-chain configuration changes
Role-Based Access: Supports both Safe owners (creators) and signers (collaborators) with appropriate permissions

Unique Features

Entity-First Architecture: Safe accounts, transactions, and configurations are Drupal entities with full CRUD workflows, caching, and access control
Deterministic Deployment: Uses CREATE2 for predictable Safe addresses before deployment
MetaMask Integration: Seamless wallet integration for deployment, signing, and execution without custom backend infrastructure
SIWE Authentication: Integrates with the SIWE Login module for Ethereum wallet-based authentication
Automatic State Sync: Database automatically updates to reflect on-chain state changes after transaction execution

Use Cases

DAO Treasuries: Enable Drupal-based DAOs and communities to manage shared funds with multi-signature security
Group Financial Management: Organizations using Drupal can deploy Safe accounts for collaborative fund management
Web3 Community Platforms: Social platforms built with Open Social or similar distributions can offer treasury features to groups
Crypto-Native Organizations: Companies operating on-chain can use Drupal as their organizational interface while maintaining custody through Safe accounts

Post-Installation

Initial Setup

Enable the Module: drush en safe_smart_accounts -y
Configure Network Settings: Visit /admin/config/safe-smart-accounts/settings to configure:
- Ethereum network (Sepolia testnet or Ethereum mainnet)
- RPC endpoint URL (Alchemy, Infura, or custom)
- Safe contract addresses (pre-filled for standard deployments)
Ensure SIWE Login is Enabled: Users must authenticate with Ethereum wallets via the SIWE Login module

User Workflow

Once installed, SIWE-authenticated users can:

Navigate to their profile tab: "Manage Safes"
Click "Create Safe Smart Account" to deploy a new Safe
Configure initial signers (Ethereum addresses) and threshold (e.g., 2 of 3 signatures required)
Approve deployment transaction in MetaMask
Wait for blockchain confirmation (~30 seconds on testnet)
Begin creating and signing transactions from the Safe management interface

Special Considerations

MetaMask Required: Users need MetaMask or a compatible Web3 wallet browser extension
Gas Fees: Deploying Safes and executing transactions requires ETH for gas fees
Testnet First: Start with Sepolia testnet to familiarize users before mainnet deployment
Cache Management: The module uses Drupal's cache system extensively; always use drush cr after configuration changes

Additional Requirements

Drupal Modules

SIWE Login (Required) - Provides Ethereum wallet authentication (EIP-4361: Sign-In with Ethereum)

PHP Requirements

PHP 8.2+ with GMP extension (required for Ethereum address checksum validation)
DDEV users: Add webimage_extra_packages: [php8.3-gmp] to .ddev/config.yaml

JavaScript Libraries

ethers.js v6 - Loaded via CDN (no local installation required)
Module includes all necessary JavaScript for Safe deployment, transaction signing, and configuration management

Blockchain Infrastructure

Ethereum RPC Endpoint - Alchemy, Infura, or self-hosted node
Safe Contracts - Pre-deployed on Sepolia and mainnet (addresses configured in module settings)

Recommended modules/libraries

Open Social - This module integrates seamlessly with Open Social distributions for group treasury functionality
Group - For organizing users and associating Safe accounts with Drupal groups
Group Treasury - A companion module that extends Safe Smart Accounts to provide group-based treasury management for Drupal groups

Similar projects

To our knowledge, there are no other Drupal modules providing Safe Smart Account integration. Related projects include:

Ethereum - Provides lower-level Ethereum blockchain integration but does not include Safe-specific functionality or multi-signature wallet management
Web3 - General Web3 connectivity utilities, but lacks the entity-first Safe account management approach
SIWE Login - Required dependency; handles wallet authentication but not treasury management

What differentiates Safe Smart Accounts:

Complete entity-based architecture with Drupal-native CRUD workflows
Full Safe Smart Account lifecycle management (deployment, configuration, transactions)
Multi-signature transaction signing and execution workflows
Automatic synchronization between blockchain state and Drupal database
Production-ready MetaMask integration with proper signature handling (eth_sign flow with v=31/32)

Supporting this Module

This module was developed as part of ongoing research into decentralized governance and Web3 community tools. If you find it useful, consider:

Contributing bug reports and feature requests on the issue queue
Submitting patches and improvements via merge requests
Sharing your use cases and deployment stories with the community
Sponsoring development through GitHub Sponsors (link coming soon)

Community Documentation

GitHub Repository: https://github.com/proofoftom/drupal_safe_smart_accounts - Includes comprehensive CLAUDE.md documentation and service interface specs
User Guide: See USERGUIDE.md in the module directory for step-by-step workflows
Service Interfaces: See SERVICE_INTERFACES.md for developer documentation on the service architecture
Safe Documentation: https://docs.safe.global - Official Safe Smart Account documentation for understanding the underlying protocol
Demo Site: Coming soon - DrupalPod instance for testing without local setup

Development & Testing

This module includes comprehensive development tooling:

Hardhat Integration: Smart contract testing environment included in hardhat.config.ts
TypeScript Tests: Integration tests in test-safe-contracts.ts using Mocha and ethers.js v6
Manual QA Checklists: Validation checklists in validation/ directory for Safe deployment, transactions, and configuration management
PHPStan & PHPCS: Static analysis and coding standards compliance

Architecture Highlights

Safe Smart Accounts follows Drupal best practices with a service-oriented architecture:

Three Custom Entities: SafeAccount, SafeTransaction, SafeConfiguration
Service Layer: SafeConfigurationService, SafeTransactionService, SafeBlockchainService, UserSignerResolver
Cache Invalidation: Automatic cache tag invalidation when Safe state changes, including propagation to all signers
Access Control: Both route-level and entity-level access checks supporting owners and signers
Post-Execution Sync: Database automatically updates after on-chain configuration changes

Roadmap

Planned features for future releases:

Support for additional EVM networks (Polygon, Optimism, Arbitrum, Base)
Integration with Safe Transaction Service API for off-chain signature collection
Module support (enable Safe modules like spending limits, recovery mechanisms)
ENS name resolution for signer addresses
Transaction templates and common operation shortcuts
Safe app integration framework for extending functionality

Safe{Wallet} Smart Accounts