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Raven Scott
2026-05-20 21:02:45 -04:00
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# API: hyper-p2p-reputation-system
**Protocol:** `hyper-p2p-reputation-system/v1`
**Export:** `HyperP2PReputationSystem`
## Overview
HyperP2PReputationSystem Novel P2P reputation/trust primitive for Bare/Pear. - Cryptographic Ed25519 signed attestations for tamper-proof updates - Time-decaying scores with configurable rate
## Constructor
```js
const mod = new HyperP2PReputationSystem(opts)
```
| Option | Type | Default | Description |
|--------|------|---------|-------------|
| `keyPair` | KeyPair | random Ed25519 | keyPair |
| `storageDir` | `<cwd>/{module}-storage` | `<cwd>/{module}-storage` | Hypercore/Hyperbee storage root |
| `decayIntervalMs` | varies | DEFAULT_DECAY_INTERVAL_MS | decayInterval (ms) |
| `decayRate` | varies | DEFAULT_DECAY_RATE | decayRate |
| `minScore` | varies | DEFAULT_MIN_SCORE | minScore |
| `maxScore` | varies | DEFAULT_MAX_SCORE | maxScore |
| `topic` | varies | null | topic |
| `enableBackgroundTimers` | boolean | `false` | Periodic timers (off in tests) |
## Methods
### `ready(—)`
- **Returns:** `Promise`
- **Throws:** — (none documented in method body)
### `attest(targetPeerId, delta, metadata = {}, remoteAttestation = null)`
- **Returns:** `Promise`
- **Throws:** — (none documented in method body)
### `receiveAttestation(attestation, targetPeerId)`
- **Returns:** `Promise`
- **Throws:** — (none documented in method body)
### `getReputation(peerId)`
- **Returns:** `value`
- **Throws:** — (none documented in method body)
### `getTopPeers(k = 10)`
- **Returns:** `value`
- **Throws:** — (none documented in method body)
### `getHistory(peerId, limit = 50)`
- **Returns:** `value`
- **Throws:** — (none documented in method body)
### `exportSnapshot(—)`
- **Returns:** `value`
- **Throws:** — (none documented in method body)
### `importSnapshot(snapshot)`
- **Returns:** `Promise`
- **Throws:**
- `Error: Invalid or unsupported snapshot version`
- `Error: Invalid snapshot: must be an object`
### `getStats(—)`
- **Returns:** `object`
- **Throws:** — (none documented in method body)
### `close(—)`
- **Returns:** `Promise<void>`
- **Throws:** — (none documented in method body)
### `getCausalTick(—)`
- **Returns:** `value`
- **Throws:** — (none documented in method body)
### `simulateRemoteAttestation(targetPeerId, delta, fromPeerHex = 'remote-peer')`
- **Returns:** `value`
- **Throws:** — (none documented in method body)
## Events
| Event | Payload |
|-------|---------|
| `attestation` | target, local |
| `close` | no payload |
| `error` | err |
| `hyperbee-fallback` | err |
| `peerBanned` | score |
| `ready` | no payload |
| `scoreUpdated` | peerId, score, attester |
| `snapshotImported` | timestamp, scoresCount, historyEntries |
## getStats()
Returns `{ ...this._stats }` — typically `ops`, `errors`, and module-specific counters (`created`, `relays`, `open`, `peers`, etc.).
Library-only modules may include `mode: 'local'`.
## Errors
Stable message substrings: see [`../_shared/ERROR_CODES.md`](../../_shared/ERROR_CODES.md).
## P2P
When `topic` is set, `ready()` joins Hyperswarm and opens Protomux `hyper-p2p-reputation-system/v1`.
## Testing
```bash
npm install && npm test
```
Integration: [`../../real_tests/integration/reputation-system-two-node.js`](../../../real_tests/integration/reputation-system-two-node.js)
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# Architecture: hyper-p2p-reputation-system
**Category:** Trust & security
```mermaid
flowchart LR
App[Application] --> Mod[HyperP2PReputationSystem]
Mod --> Mux[Protomux hyper-p2p-reputation-system/v1]
Mux --> Swarm[Hyperswarm]
```
## Sequence (P2P)
```mermaid
sequenceDiagram
participant App
participant Mod as Module
participant SW as Hyperswarm
participant Peer
App->>Mod: ready(topic)
Mod->>SW: join(topic)
SW->>Peer: connection
Mod->>Peer: gossip / Protomux
Peer-->>Mod: onmessage
Mod-->>App: emit(event)
```
## Wire messages
| type | fields | direction | behavior |
|------|--------|-----------|----------|
| `attestation` | attestation, target | gossip | Handled in onmessage / gossipSend |
## State model
- In-memory `Map` / `Set` structures for hot path
- Optional Hyperbee/Hypercore persistence when `storageDir` or `memoryOnly` is configured
- `close()` tears down swarm, timers, and clears ephemeral state
## Composition
Composes with: `hyper-p2p-attestation-chain`, `hyper-p2p-trust-graph`.