Multisig Treasury Smart Contract

A secure multisignature treasury implementation for Cardano using Aiken smart contracts

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About Multisig Treasury

This project is a multisignature treasury smart contract implementation for Cardano, built with Aiken and Next.js. It provides a secure, on-chain mechanism for managing shared assets that require multiple signatures for fund transfers, making it ideal for DAOs, organizations, and collaborative asset management.

This implementation provides:

• Aiken-based smart contracts for multisig treasury validation and security
• Next.js frontend for treasury management and monitoring
• Mesh SDK integration for wallet connectivity and transaction building
• Blockfrost API integration for blockchain data queries and asset tracking
• Comprehensive documentation for developers implementing multisig solutions

The project serves as both a practical tool for creating secure multisig treasuries and an educational resource for understanding Cardano's smart contract capabilities.

Key Benefits

• Multi-Signature Security: Require multiple signatures for fund transfers to prevent unauthorized access
• Flexible Authorization: Configurable threshold signatures (M-of-N multisig schemes)
• Asset Management: Support for ADA and native tokens in treasury storage
• Developer-Friendly: Aiken smart contracts ensure safe, auditable code
• Transparent Operations: All transactions recorded on-chain for full auditability
• Wallet Integration: Support for major Cardano wallets via CIP-30 standard

Use Cases

• DAO Treasuries: Decentralized organization fund management with multisig approval
• Organizational Accounts: Enterprise-grade asset custody with shared control
• Escrow Services: Secure holding of assets pending condition fulfillment
• Collaborative Investment: Joint account management with agreed-upon rules

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🌐 Features

• Multisig Authorization
  Require multiple wallet signatures before fund transfers. Configurable M-of-N schemes (e.g., 2-of-3, 3-of-5) for flexible security levels.

• Treasury Management
  Deposit, store, and withdraw ADA and native tokens with full multisig approval workflow. Track all treasury operations on-chain.

• Proposal System
  Create transfer proposals with detailed specifications. Signatories review and approve/reject proposals within the smart contract.

• Wallet Integration
  Seamless integration with Nami, Eternl, Flint, Lace, and other CIP-30 compatible wallets.

• Transaction Building
  Mesh SDK-powered transaction builder for treasury operations and multisig approvals.

• Blockchain Explorer Integration
  Real-time querying via Blockfrost API for treasury status and transaction verification.

• Comprehensive Validation
  Aiken smart contracts ensure all multisig requirements and treasury rules are enforced before on-chain settlement.

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🛠️ Technology Stack

Component	Technologies	Purpose
Frontend	Next.js 13, React, TypeScript, TailwindCSS	Treasury dashboard and multisig interface
Blockchain	Mesh SDK, CIP-30, Blockfrost API	Wallet integration and blockchain interaction
Smart Contracts	Aiken (compiles to Plutus Core)	Multisig validation and treasury logic
Transaction	Mesh TxBuilder	High-level transaction construction
Data	TypeScript interfaces, Plutus JSON	Type-safe data structures and contract exports

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⚡ Getting Started

Prerequisites: Node.js 18+, npm/yarn, and Cardano wallets with testnet ADA.

1. Clone the Repository

   git clone https://github.com/independenceee/multisig-treasury.git
   cd multisig-treasury

2. Install Dependencies

   npm install
   # or
   yarn install

3. Configure Environment

   cp .env.example .env

   Edit .env with:

   • BLOCKFROST_API_KEY: Get from Blockfrost
   • NETWORK: Set to preview or mainnet
   • CARDANO_NETWORK: Network configuration

4. Build Smart Contracts

   cd contract
   aiken build

5. Run Locally

   npm run dev

   Access at http://localhost:3000

6. Build for Production

   npm run build
   npm start

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📁 Project Structure

├── app/                    # Next.js pages and layouts
│   ├── layout.tsx         # Root layout component
│   └── page.tsx           # Homepage
├── adapters/              # Blockchain adapters
│   └── mesh.adapter.ts    # Mesh SDK adapter
├── providers/             # Blockchain providers
│   └── blockfrost.provider.ts  # Blockfrost integration
├── txbuilders/            # Transaction builders
│   └── mesh.txbuilder.ts  # Transaction construction logic
├── constants/             # Application constants
│   ├── common.constant.ts # Common configurations
│   └── enviroments.constant.ts  # Environment settings
├── types/                 # TypeScript definitions
│   └── index.d.ts         # Type definitions
├── contract/              # Smart contracts
│   ├── lib/               # Aiken library modules
│   │   └── contract/      # Treasury contract types
│   ├── validators/        # Plutus validators
│   │   └── treasury.ak    # Main multisig treasury validator
│   ├── aiken.toml         # Aiken configuration
│   └── plutus.json        # Compiled Plutus Core
├── tests/                 # Test suite
│   └── mesh.test.ts       # Integration tests
└── README.md              # This file

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🧑‍💻 Developer Notes

• Treasury Validator: The main smart contract in contract/validators/treasury.ak handles all multisig authorization logic
• Proposal Datum: Stores transfer proposals with recipient, amount, and signature count
• Multisig Logic: Smart contract verifies required number of signatures before allowing fund transfers
• Testing: Run npm test for Jest unit tests
• Extending: Add new treasury features in contract/validators/ and compile with aiken build
• Type Safety: Leverage TypeScript for frontend and Aiken for smart contracts

For detailed Multisig patterns on Cardano, consult Cardano Developer Portal.

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🤝 Contributing

Contributions are welcome! Please:

1. Fork and create a feature branch
2. Commit with clear messages
3. Push to your fork
4. Open a Pull Request

See CONTRIBUTING.md for guidelines.

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📚 Resources

• Aiken Language Book
• Mesh SDK Documentation
• Cardano Developer Portal
• Blockfrost API Docs
• Plutus Documentation

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📝 License

Licensed under the MIT License. Copyright © 2026 independenceee.