Solana Lending Ecosystem Contract

A decentralized lending protocol built on Solana blockchain using Anchor framework and Rust. This project enables peer-to-peer lending with collateralized loans, providing a secure and efficient lending ecosystem.

📞 Contact

• Telegram: @Ee1030109
• Project: Solana Lending Ecosystem Contract

🚀 Overview

This lending contract allows users to:

• Create Loans: Lenders can create loan offers with specified terms
• Borrow Loans: Borrowers can take loans by providing collateral
• Repay Loans: Borrowers can repay loans to retrieve their collateral
• Cancel Loans: Lenders can cancel unborrowed loan offers

🏆 Competitive Advantage

Built to compete with established lending protocols like:

• text.fi - Offering enhanced features and better user experience
• rain.fi - Providing more flexible lending terms and lower fees

✨ Features

Core Functionality

• Collateralized Lending: Secure loans backed by digital assets
• Flexible Terms: Customizable loan amounts, interest rates, and durations
• Automatic Expiration: Built-in loan expiration mechanism
• Fee System: Configurable lending and borrowing fees
• Authority Management: Multi-level authority system for protocol governance

Technical Features

• Anchor Framework: Built with Anchor for Solana program development
• Rust Implementation: High-performance, memory-safe smart contracts
• SPL Token Support: Native integration with Solana's token standard
• TypeScript SDK: Full TypeScript support for frontend integration

🛠️ Technology Stack

• Blockchain: Solana
• Framework: Anchor
• Language: Rust
• Frontend SDK: TypeScript
• Token Standard: SPL Token

📋 Prerequisites

• Node.js (v16 or higher)
• Rust (latest stable)
• Solana CLI
• Anchor CLI
• Yarn or npm

🚀 Installation

1. Clone the repository

   git clone <repository-url>
   cd lending-contract

2. Install dependencies

   yarn install

3. Build the program

   anchor build

4. Deploy to localnet (for testing)

   anchor deploy

📖 Usage

Program ID

EZZtc7TU4Dd5Bc1wdQZ9szhsv3cavuHzNCy8Laq1beLU

Available Instructions

1. Configure

Set global protocol configuration (admin only)

await program.methods
  .configure(config)
  .accounts({
    config: configPda,
    authority: admin.publicKey,
  })
  .signers([admin])
  .rpc();

2. Create Loan

Create a new loan offer

await program.methods
  .createLoan(loanAmount, interestRate, duration, collateralAmount)
  .accounts({
    loan: loanPda,
    lender: lender.publicKey,
    loanMint: loanMint,
    collateralMint: collateralMint,
  })
  .signers([lender])
  .rpc();

3. Borrow Loan

Borrow an existing loan by providing collateral

await program.methods
  .borrowLoan(collateralAmount)
  .accounts({
    loan: loanPda,
    borrower: borrower.publicKey,
    collateralMint: collateralMint,
  })
  .signers([borrower])
  .rpc();

4. Repay Loan

Repay a borrowed loan to retrieve collateral

await program.methods
  .repayLoan()
  .accounts({
    loan: loanPda,
    borrower: borrower.publicKey,
    loanMint: loanMint,
    collateralMint: collateralMint,
  })
  .signers([borrower])
  .rpc();

5. Cancel Loan

Cancel an unborrowed loan offer

await program.methods
  .cancelLoan()
  .accounts({
    loan: loanPda,
    lender: lender.publicKey,
  })
  .signers([lender])
  .rpc();

🧪 Testing

Run the test suite:

anchor test

Or run specific tests:

yarn test

📁 Project Structure

lending-contract/
├── Anchor.toml              # Anchor configuration
├── Cargo.toml               # Rust dependencies
├── package.json             # Node.js dependencies
├── programs/
│   └── lending/
│       ├── src/
│       │   ├── lib.rs       # Main program entry point
│       │   ├── state.rs     # Account structures
│       │   ├── errors.rs    # Custom error definitions
│       │   ├── constants.rs # Program constants
│       │   ├── utils.rs     # Utility functions
│       │   └── instructions/
│       │       ├── mod.rs   # Instruction module
│       │       ├── configure.rs
│       │       ├── create_loan.rs
│       │       ├── borrow_loan.rs
│       │       ├── repay_loan.rs
│       │       └── cancel_loan.rs
│       └── Cargo.toml
├── migrations/
│   └── deploy.ts            # Deployment script
└── tests/                   # Test files

🔧 Configuration

The protocol supports the following configurable parameters:

• Authority: Protocol admin address
• Team Wallet: Fee collection address
• Lend Fee: Fee charged to lenders (in basis points)
• Borrow Fee: Fee charged to borrowers (in basis points)
• Expire Duration: Default loan expiration time

🔒 Security

• Collateral Verification: All loans require sufficient collateral
• Authority Checks: Proper permission validation for admin functions
• Expiration Handling: Automatic loan expiration to prevent stale offers
• Fee Management: Secure fee collection and distribution

🤝 Contributing

1. Fork the repository
2. Create a feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

📄 License

This project is licensed under the ISC License.

🙏 Acknowledgments

• Anchor Framework for Solana program development
• Solana Labs for the blockchain infrastructure
• The Solana community for continuous support and feedback

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Built with ❤️ for the Solana ecosystem