Date: 2026-05-14
Author: DCC Infrastructure Team

# DCC (Data Collection Coin) System Whitepaper

## 1. Overview
This document describes the technical infrastructure configuration, data flow, and integration methods with external systems that support the DCC ecosystem.

## 2. System Architecture

### 2.1 High-Level Architecture
- **Client Layer**: Mobile apps, web dashboards, data collection SDKs.
- **Service Layer**: API Gateway, data verification servers, transaction managers.
- **Blockchain Layer**: Polygon Mainnet, smart contracts (DCC, Manager).
- **Storage Layer**: Cloud DB (Metadata), IPFS (Original Data).

## 3. Core Module Description

### 3.1 Transaction Engine
Manages gas fees and the signing process occurring when users purchase data or receive rewards.
- **Gas Relay**: Considering support for Meta-transaction features to improve user experience (gas fee payment on behalf of the user).
- **Nonce Manager**: Ensures transaction ordering and retry logic upon failure.

### 3.2 Wallet Integration and Security
- **Supported Wallets**: ERC20 compatible wallets such as MetaMask, WalletConnect, and Trust Wallet.
- **KMS (Key Management System)**: Integration with HSM (Hardware Security Module) for safe management of administrative wallet private keys.

### 3.3 Data Processing Pipeline
1. **Collection**: Client SDK encrypts and uploads data.
2. **Verification**: Off-chain verification server performs data validity checks.
3. **Recording**: Records the hash value of valid data on the blockchain and triggers the reward transaction.

## 4. Infrastructure Operation (Node Strategy)
- **RPC Nodes**: Ensures stable network access via Infura, Alchemy, or self-hosted Polygon full nodes.
- **Redundancy**: Distributed server placement in major global regions to provide uninterrupted service.

## 5. Monitoring and Dashboard
- **On-chain Analysis**: Real-time visualization of token circulation and burn status using tools like Dune Analytics.
- **System Logs**: Monitoring server errors and transaction failures using the ELK Stack.

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