FlowCreditMarket - DeFi Lending Protocol on Flow

📊 Project Status

• Contract: ✅ Implemented with FungibleToken Standard
• Tests: ✅ 100% Passing (22/22 tests)
• Coverage: ✅ 89.7%
• Documentation: ✅ Complete
• Standards: ✅ FungibleToken & DeFi Actions Compatible
• FlowVault Removal: ✅ Complete (Ready for FlowVaults Integration)

🎯 FlowVaults Integration Milestones

Current Status (Tracer Bullet Phase)

• ✅ Smart Contract Integration: FlowCreditMarket provides sink/source interfaces for token swapping
• ✅ Development & Testing: Automated testing framework for FlowCreditMarket and DefiActions
• ✅ Repository Structure: FlowCreditMarket code in private repo, DefiActions in public repo
• 💛 Test Coverage: Working towards comprehensive test suite for FlowVaults functionality
• 👌 AMM Integration: Currently using dummy swapper, real AMM deployment planned

Upcoming (Limited Beta)

• ✅ Documentation: First pass documentation of FlowCreditMarket (this README)
• ✅ Testing: Extensive test suite for FlowCreditMarket and DefiActions
• 💛 Sample Code: DefiActions sample code and tutorials needed
• 👌 Advanced Features: Per-user limits and controlled testing capabilities

Future (Open Beta)

• ✅ Open Access: Full public access to FlowCreditMarket and DefiActions
• 💛 Documentation: Improved documentation and tutorials
• ✅ Sample Code: Complete tutorials for DefiActions integration

🏦 About FlowCreditMarket

FlowCreditMarket is a decentralized lending and borrowing protocol built on the Flow blockchain. It implements the Flow FungibleToken standard and integrates with DeFi Actions for composability.

Key Features

• FungibleToken Standard: Full compatibility with Flow wallets and DEXs
• DeFi Actions Integration: Composable with other DeFi protocols via Sink/Source interfaces
• Vault Operations: Secure deposit and withdraw functionality
• Position Management: Create and manage lending/borrowing positions
• Interest Mechanics: Compound interest calculations with configurable rates
• Health Monitoring: Real-time position health calculations and overdraft protection
• Access Control: Secure entitlement-based access with proper authorization
• Token Agnostic: Supports any FungibleToken.Vault implementation (FlowVault removed)

Technical Highlights

• Implements FungibleToken.Vault interface for standard token operations
• Provides DeFiActions.Sink and DeFiActions.Source for DeFi composability
• Uses scaled balance tracking for efficient interest accrual
• Supports multiple positions per pool with independent tracking
• Includes comprehensive metadata views for wallet integration

🧪 Test Suite

The project includes comprehensive tests covering all functionality:

# Run all tests with coverage
flow test --cover

# Run specific test file
flow test cadence/tests/core_vault_test.cdc

Test Results Summary

• Core Vault Operations: ✅ 3/3 passing
• Interest Mechanics: ✅ 6/6 passing
• Position Health: ✅ 3/3 passing
• Token State Management: ✅ 3/3 passing
• Reserve Management: ✅ 3/3 passing
• Access Control: ✅ 2/2 passing
• Edge Cases: ✅ 3/3 passing
• Simple Import: ✅ 2/2 passing

Total: 22/22 tests passing with 89.7% code coverage

For detailed test status and FlowVault removal summary, see TestingCompletionSummary.md

🚀 Quick Start

Prerequisites

• Flow CLI installed
• Visual Studio Code with Cadence extension

Installation

1. Clone the repository:

git clone https://github.com/your-username/FlowCreditMarket.git
cd FlowCreditMarket

2. Install dependencies:

flow dependencies install

3. Run tests:

flow test --cover

Deploy to Emulator

1. Start the Flow emulator:

flow emulator --start

2. Deploy the contracts:

flow project deploy --network=emulator

📦 Project Structure

FlowCreditMarket/
├── cadence/
│   ├── contracts/
│   │   └── FlowCreditMarket.cdc           # Main lending protocol contract
│   ├── tests/
│   │   ├── test_helpers.cdc            # Shared test utilities
│   │   ├── core_vault_test.cdc         # Vault operation tests
│   │   ├── interest_mechanics_test.cdc # Interest calculation tests
│   │   └── ...                         # Other test files
│   ├── transactions/                   # Transaction templates (coming soon)
│   └── scripts/                        # Query scripts (coming soon)
├── FlowActions/
│   └── cadence/contracts/interfaces/
│       └── DeFiActions.cdc             # DeFi Actions interface
├── imports/                            # Flow standard contracts
├── flow.json                           # Flow configuration
└── README.md                           # This file

🔧 Contract Architecture

Core Components

1. Pool: Main lending pool managing positions and reserves
2. Position: User positions tracking deposits and borrows
3. TokenState: Per-token state including interest indices
4. FlowCreditMarketSink/Source: DeFi Actions integration for composability

Key Interfaces

• FungibleToken.Vault: Standard token operations
• ViewResolver: Metadata views for wallets
• Burner.Burnable: Token burning capability
• DeFiActions.Sink/Source: DeFi protocol composability

🛠️ Development

Creating a Position

// Create a new pool with your token type
let pool <- FlowCreditMarket.createPool(
    defaultToken: Type<@YourToken.Vault>(),
    defaultTokenThreshold: 0.8
)

// Create a position
let positionId = pool.createPosition()

// Deposit funds
let vault <- YourToken.mintTokens(amount: 100.0)
pool.deposit(pid: positionId, funds: <-vault)

Running Tests

# Run all tests
flow test --cover

# Run specific test category
flow test cadence/tests/interest_mechanics_test.cdc

📚 Documentation

Current Documentation

• Testing Completion Summary - Latest test results and FlowVault removal
• Tests Overview - Comprehensive test blueprint
• Intensive Test Analysis - Security testing results
• Cadence Testing Best Practices - Testing guidelines

Planning & Roadmap

• FlowVaults Integration Milestones - Integration phases
• Future Features - Upcoming development

🤝 Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

📄 License

This project is licensed under the MIT License.

🔗 Resources

• Flow Documentation
• Cadence Language
• FungibleToken Standard
• DeFi Actions
• Flow Discord

Note

Tests are being updated for the new contract implementation and will be added in the next PR.