# Technical Architecture

PennyWhale WORLD adopts a hybrid architecture model of "on-chain assets + off-chain computing + multi-chain compatibility" to ensure playability, security and scalability of the economic model.

### Technical Architecture Overview

Multi-layer collaboration and module decoupling

<figure><img src="/files/3ZCBoPBSkrvqkFMd0ER7" alt=""><figcaption></figcaption></figure>

### Core module description

① Blind box generation and prize drawing logic (Chain + Offchain Hybrid)
\
Rarity algorithm: pre-configure NFT pool and drop probability to ensure fairness and anti-cheating.

Off-chain preprocessing + on-chain prize drawing: off-chain calculation results are confirmed by smart contract signature to ensure a balance between efficiency and security.

Anti-brushing protection mechanism: rate limit and risk control interception for high-frequency requests from the same wallet or IP.

<figure><img src="/files/Oo9lSXfbLV2rqfqZFjLT" alt=""><figcaption></figcaption></figure>

② NFT management system
\
Support ERC-721/1155 protocol, all characters, props, pets and other assets are on-chain.

Provide visual market orders, leasing, synthesis and other operations.

Realize cross-chain asset bridging (EVM compatible chains, such as BNB, Polygon, Avalanche, etc.).

③ User identity and wallet system
\
Support multi-wallet login (MetaMask, OKX Wallet, WalletConnect, etc.).

DID integration combined with user level system, open achievement/identity authentication NFT.

Bind user social ID (such as Twitter, Discord) as the basis for fission.

<figure><img src="/files/L4Y71CZTF75vxTnP8V2K" alt=""><figcaption></figcaption></figure>

④ Data analysis and dynamic adjustment module
\
Track player behavior data (box opening frequency, activity, LTV, etc.).

Real-time feedback to adjust the blind box output ratio, rare NFT drop rate, etc..

Used to optimize player life cycle management and dynamic stability of economic models.

### &#x20;Security mechanism

Multi-round audit of smart contracts&#x20;

<figure><img src="/files/0osQYNBwYFMJvoAGTdBZ" alt=""><figcaption></figcaption></figure>

All blind box prizes are recorded on the chain, open for query, and prevent dark box operations.

Multi-signature and hardware wallet support for user assets to ensure fund security.

| penny Modules      | Technical Support                                                        | Benefit experience                                 |
| ------------------ | ------------------------------------------------------------------------ | -------------------------------------------------- |
| Blind Box System   | Configure probability/rarity algorithm + on-chain signature verification | Ensure fairness, transparency and anti-cheating    |
| NFT System         | Asset model support + strong interactive synthesis gameplay              | Enhance asset playability and economic depth       |
| Wallet Integration | Multi-wallet support + DID binding + limit protection mechanism          | Improve security and identity authentication value |
| Economic Structure | Market + Cross-chain Bridge + Penny Economic Model                       | Realize free trade and global liquidity of assets  |

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