69 lines
2.0 KiB
Markdown
69 lines
2.0 KiB
Markdown
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# P2PBox Reference (Phase 9.79 Minimal)
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Status: Experimental (Loopback-ready)
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Updated: 2025-08-26
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## Overview
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P2PBox is a structured P2P node built on IntentBox + MessageBus + Transport.
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This document covers the minimal API implemented for Phase 9.79.
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## Core API
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- new(nodeId: String, transport: String)
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- getNodeId() -> String
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- getTransportType() -> String
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- isReachable(nodeId: String) -> Bool
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- send(to: String, intent: IntentBox) -> ResultBox<Bool, Error>
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- on(intentName: String, handler: MethodBox) -> ResultBox<Bool, Error>
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- getLastIntentName() -> String // testing helper
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- getLastFrom() -> String // testing helper
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Notes:
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- send() returns ResultBox; Ok(true) on success, Err(message) on failure
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- on() currently wires MethodBox to transport and will call MethodBox.invoke(intent, from)
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- MethodBox.invoke is a stub until Interpreter hook is added (see Roadmap)
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## Transport
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- InProcessTransport only (in-proc MessageBus)
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- Transport trait exposes register_intent_handler(intent, cb) used by on()
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## Lifecycle
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Typical pattern where handler captures 'me':
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```nyash
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static box Node {
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init { p2p, handle }
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birth() {
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me.p2p = new P2PBox("alice", "inprocess")
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me.handle = new MethodBox(me, "onPing")
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me.p2p.on("ping", me.handle)
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}
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onPing(intent, from) {
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// TODO: requires MethodBox.invoke integration with interpreter
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// print("got " + intent.getName() + " from " + from)
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}
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}
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```
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Destruction order (no strong-cycle):
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- Node (me) drops → fields drop (p2p, handle)
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- P2PBox drops → InProcessTransport Drop → MessageBus unregister
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- Registered handlers released → MethodBox released → me released
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## Quick Smoke
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```bash
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cargo build -j32
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./target/debug/nyash local_tests/p2p_self_ping.nyash
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# Expect:
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# last intent: ping
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# last from: alice
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```
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## Roadmap
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- MethodBox.invoke → Interpreter hook (global invoker or dedicated API)
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- P2PBox.off(intent) and onOnce(intent, handler)
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- WebSocket/WebRTC transports implementing register_intent_handler
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- Remove testing helpers (getLast*) once full handler path is live
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