Smart Contracts v2

This section of the repository contains the second-generation smart contracts designed for the check-in system and related hub membership logic within the Belong ecosystem.

View the source code and documentation here:
👉 GitHub — checkin-contracts

🧩 Architecture Overview

The Smart Contracts v2 are modular and built with extensibility in mind.
They define the core logic for hub membership, user verification, and activity check-ins.

Main Components

HubRegistry

• Manages registration and ownership of hubs.
• Keeps track of hub metadata and authorized administrators.
• Provides access control for other contracts interacting with specific hubs.

Membership

• Handles user memberships within hubs.
• Supports joining and leaving hubs, as well as assigning roles.
• Integrates with HubRegistry for permission validation.

CheckIn

• Implements the check-in mechanism for events or hubs.
• Verifies user membership and eligibility.
• Emits on-chain events for transparency and analytics.

Utils and Interfaces

• Contain shared utilities and standardized interfaces for interoperability.
• Ensure that external integrations can interact safely with the core contracts.

⚙️ Technical Details

• Language: Solidity
• Framework: Hardhat
• Network Support: EVM-compatible chains (BNB, Polygon, Skale, etc.)
• Version: v2 branch (active development)