# Protocol Components

## Sub-chain 1: Semantic & Behavior Layer:

Sub-chain 1 is a behavior analysis blockchain built on a lightweight node listening network and AI tagging nodes. It implements the following functions:

* Listen to full-chain transaction events and parse them with unified encoding.
* Generate a trusted full-chain tagging knowledge base through node voting consensus.
* AI analysis model on nodes analyzes behavior, intent, and characteristics of on-chain behavior, generating behavioral context.
* Node cooperation training to improve the tagging knowledge base.

Sub-chain Components:

1. On-chain lightweight node network: Listens to multi-chain transactions and events, serving as the on-chain behavior data collection layer.
2. Intelligent tagging node network: Combines models and knowledge bases to structure address/transaction behavior tagging.
3. AI tagging model: Maintained by the official FinTax, with node cooperation training, it tags transaction types, address identities, etc., and is deployed on intelligent tagging nodes.
4. On-chain tagging consensus mechanism: Node voting mechanism to unify address labels and behavior classification results.
5. Tagging knowledge base: A structured tagging database synchronized across all nodes.

## Sub-chain 2: zkPassport Layer

Sub-chain 2 is the identity infrastructure based on VC credentials, Zero-Knowledge Proof (zkProof), and privacy proofs.

* Address is identity, allowing for the programmable issuance of VCs.
* Proves permissions/identity/asset legitimacy through Zero-Knowledge Proof.
* Integrates with the True Value Layer, providing full-chain asset proof for zkPassport users.
* Supports integration with real-world credential systems (such as tax certificates, KYC VCs, etc.).
* zkProof is stored on-chain, immutable and verifiable.

Sub-chain Components:

1. Zero-Knowledge Proof generator and verifier: Generates and verifies privacy proofs based on zkSNARK, ensuring data is verified without being disclosed.
2. Off-chain credential integration module: Supports local apps or DApps to upload and verify off-chain credentials. zkProof is stored on-chain in a privacy-preserving manner, while real credentials remain on the local device.
3. zkPassport SDK: A development toolkit that provides VC display, zk generation, and interaction functions for front-end or wallet integration.
4. VC-zkProof on-chain storage node: Managed by a decentralized node network, responsible for receiving, verifying, and storing zkProof, ensuring that proof data on-chain is verifiable, immutable, and consensus-driven.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.mercurynet.org/2.-technical-architecture/protocol-components.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.