Building a Compliant ERC-4626 Tokenized Vault on Redbelly Network.

Deliverable 5: Compliance Asset Tokenization Vault (CATVault) Documentation Guide

Welcome to the official technical documentation guide for the CATVault protocol implementation on the Redbelly Network. This vault utilizes the OpenZeppelin ERC-4626 Tokenized Vault Standard coupled with institutional jurisdiction verification.

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1. Architectural Design Overview

The CATVault acts as a compliance-gated wrapper for Real World Assets (RWAs). It intercepts standard token interactions via internal lifecycle hooks to enforce strict regulatory boundaries before any state change occurs.

Core Component Relationships:

*CATVault.sol: The primary smart contract inheriting from OpenZeppelin’s ERC-4626 implementation. It overrides internal _deposit and _withdraw hooks.

IRedbellyBusinessIdentifier.sol: The interface that links our vault to Redbelly’s native on-chain identity protocol.

MockRedbellyRegistry.sol: A high-fidelity testing double used to simulate authenticated user network identity data during development.

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2. Technical Feature Breakdown

A. Automatic Hook Interception

Every time a user invokes deposit() or mint(), the contract checks the user’s wallet address against the Redbelly Identity Registry to retrieve their 2-letter ISO country code (e.g., NG, US).

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B. Admin-Enforced Jurisdiction Blocklist

In institutional asset tokenization, regulatory landscapes can change overnight. A jurisdiction that was compliant yesterday might face new restrictions tomorrow. To handle this volatility without requiring a full contract redeployment, the CATVault includes an admin-controlled, dynamic geographic gating mechanism.

The contract owner can dynamically restrict or grant access to entire geographic regions in real time using the following function:

/**

• @notice Dynamically updates the compliance status of a geographic region
• @param jurisdictionCode The 2-letter ISO country code (e.g., “US”, “NG”)
• @param status True to block the jurisdiction, False to allow it */ function updateJurisdictionBlocklist( string memory jurisdictionCode, bool status ) external onlyOwner;