feat: codec as a property of the protocol implementations

For easy access from `@waku/core` without the need to depend on package
implementing the protocol.

packages/core/CHANGELOG.md

@@ -7,6 +7,14 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- `multicodec` property from protocol interfaces.
+
+### Removed
+
+- Dependency on `@waku/peer-exchange`.
+
 ## [@waku/core@0.0.10] - 2023-01-25
 
 ### Changed

packages/core/src/lib/filter/index.ts

@@ -65,6 +65,7 @@ export type UnsubscribeFunction = () => Promise<void>;
  * - https://github.com/status-im/nwaku/issues/948
  */
 class Filter implements IFilter {
+  multicodec: string;
   pubSubTopic: string;
   private subscriptions: Map<string, Callback<any>>;
   private decoders: Map<
@@ -73,6 +74,7 @@ class Filter implements IFilter {
   >;
 
   constructor(public components: FilterComponents, options?: CreateOptions) {
+    this.multicodec = FilterCodec;
     this.subscriptions = new Map();
     this.decoders = new Map();
     this.pubSubTopic = options?.pubSubTopic ?? DefaultPubSubTopic;

packages/core/src/lib/light_push/index.ts

@@ -52,9 +52,11 @@ export interface CreateOptions {
  * Implements the [Waku v2 Light Push protocol](https://rfc.vac.dev/spec/19/).
  */
 class LightPush implements ILightPush {
+  multicodec: string;
   pubSubTopic: string;
 
   constructor(public components: LightPushComponents, options?: CreateOptions) {
+    this.multicodec = LightPushCodec;
     this.pubSubTopic = options?.pubSubTopic ?? DefaultPubSubTopic;
   }
 

packages/core/src/lib/store/index.ts

@@ -105,9 +105,11 @@ export interface QueryOptions {
  * The Waku Store protocol can be used to retrieved historical messages.
  */
 class Store implements IStore {
+  multicodec: string;
   pubSubTopic: string;
 
   constructor(public components: StoreComponents, options?: CreateOptions) {
+    this.multicodec = StoreCodec;
     this.pubSubTopic = options?.pubSubTopic ?? DefaultPubSubTopic;
   }
 

packages/interfaces/CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- `multicodec` property on protocol interfaces.
+
 ## [0.0.7] - 2023-01-18
 
 ### Added

packages/interfaces/src/protocols.ts

@@ -12,6 +12,7 @@ export enum Protocols {
 }
 
 export interface PointToPointProtocol {
+  multicodec: string;
   peerStore: PeerStore;
   peers: () => Promise<Peer[]>;
 }

packages/peer-exchange/src/waku_peer_exchange.ts

@@ -30,6 +30,7 @@ const log = debug("waku:peer-exchange");
  * Implementation of the Peer Exchange protocol (https://rfc.vac.dev/spec/34/)
  */
 export class WakuPeerExchange implements IPeerExchange {
+  multicodec: string;
   private callback:
     | ((response: PeerExchangeResponse) => Promise<void>)
     | undefined;
@@ -42,6 +43,7 @@ export class WakuPeerExchange implements IPeerExchange {
     public components: PeerExchangeComponents,
     public createOptions?: ProtocolOptions
   ) {
+    this.multicodec = PeerExchangeCodec;
     this.components.registrar
       .handle(PeerExchangeCodec, this.handler.bind(this))
       .catch((e) => log("Failed to register peer exchange protocol", e));