# Interconnections Guide

## Hypercore + Hyperswarm + Hyperdrive Stack

```
Hypercore (logs) → Hyperdrive (FS) → Hyperswarm (swarm)
  ↓ DHT announce
HyperDHT (discovery)
```

**Example: Collaborative FS**

```js
const Hypercore = require('hypercore')
const Hyperdrive = require('hyperdrive')
const Hyperswarm = require('hyperswarm')

const core = new Hypercore(Randy('./meta'))
const drive = new Hyperdrive('./drive', core)
const swarm = new Hyperswarm()

swarm.join(core.discoveryKey)
swarm.on('connection', (conn) => drive.replicate(conn))
```

## Tradeoffs Table

| Combo | Use Case | Perf Note |
|-------|----------|-----------|
| Hypercore + Swarm | Chat logs | Low latency gossip |
| Drive + DHT | File share | Sparse replication |
| Bee + Multisig | DB collab | Append-proof integrity |

More: Autobase for CRDT over cores.

## Full Stack Interconnect (Hypercore + Swarm + DHT)

```
mermaid
graph TB
  App[App/Pear] --> HS[Hyperswarm.join(topic)]
  HS --> HD[HyperDHT.lookup/announce]
  HD --> DHT[Kademlia + Holepunch]
  HS -->|Noise Stream| HC[Hypercore.replicate]
  HC --> Drive[Hyperdrive/Hyperbee]
```

**DHT-Swarm Flow:** Topic hash → DHT peers → direct Noise conn → protocol mux (Protomux for cores).

**Perf Notes:** 95% direct conn, relays <5%.