# On chain architecture

> **Every compound scored on Peptosis is permanent. No institution can alter it. No platform shutdown can erase it.**

The on-chain layer is what separates Peptosis from every other biotech intelligence tool. It is not a feature — it is a philosophical commitment to open science.

## What Goes On-Chain

```solidity
// Peptosis On-Chain Registry — Base Network

// Every graded compound emits an on-chain event
contract PeptosisRegistry {

  event CompoundScored(
    bytes32 indexed compound_id,  // unique compound identifier
    address indexed scorer,        // AI agent or validator address
    uint8   grade,                 // 0=D, 1=C, 2=B, 3=A, 4=A+
    uint16  score,                 // 0-1000 (div 10 for display)
    uint256 timestamp,             // block timestamp
    bytes32 data_hash              // IPFS hash of full analysis
  );

  // Anyone can verify any score at any time
  function verify_score(bytes32 compound_id)
    external view returns (CompoundRecord memory);
}
```

Every scoring event is an immutable on-chain record. The full analysis data is stored on IPFS and referenced by hash. This means the complete intelligence output for every compound — every score, every factor, every grade — is publicly verifiable, permanently available, and owned by no one.

***

## Why Base

* **Low fees** make on-chain logging practical at scale — every compound score is logged without cost being a barrier.
* **Coinbase ecosystem alignment** brings mainstream trust and discoverability.
* **Strong consumer app and AI × crypto developer culture.**
* **Long-term Ethereum security** guarantees the permanence of on-chain records.
* **Base is early enough** for a category leader to define the landscape.


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