diff --git a/.size-limit.cjs b/.size-limit.cjs
index 6116b79fc7..9c7cd40900 100644
--- a/.size-limit.cjs
+++ b/.size-limit.cjs
@@ -6,19 +6,24 @@ module.exports = [
   },
   {
     name: "Waku default setup",
-    path: "packages/create/bundle/index.js",
-    import:
-      "{ createLightNode, waitForRemotePeer, createEncoder, createDecoder }",
+    path: ["packages/create/bundle/index.js", "packages/core/bundle/index.js"],
+    import: {
+      "packages/create/bundle/index.js": "{ createLightNode }",
+      "packages/core/bundle/index.js":
+        "{ waitForRemotePeer, createEncoder, createDecoder }",
+    },
   },
   {
     name: "ECIES encryption",
     path: "packages/message-encryption/bundle/ecies.js",
-    import: "{ generatePrivateKey, createEncoder, createDecoder, DecodedMessage }",
+    import:
+      "{ generatePrivateKey, createEncoder, createDecoder, DecodedMessage }",
   },
   {
     name: "Symmetric encryption",
     path: "packages/message-encryption/bundle/symmetric.js",
-    import: "{ generateSymmetricKey, createEncoder,  createDecoder, DecodedMessage }",
+    import:
+      "{ generateSymmetricKey, createEncoder,  createDecoder, DecodedMessage }",
   },
   {
     name: "DNS discovery",
@@ -28,16 +33,16 @@ module.exports = [
   {
     name: "Privacy preserving protocols",
     path: "packages/core/bundle/index.js",
-    import: "{ WakuRelay }",
+    import: "{ wakuRelay }",
   },
   {
     name: "Light protocols",
     path: "packages/core/bundle/index.js",
-    import: "{ WakuLightPush, WakuFilter }",
+    import: "{ wakuLightPush, wakuFilter }",
   },
   {
     name: "History retrieval protocols",
     path: "packages/core/bundle/index.js",
-    import: "{ WakuStore }",
+    import: "{ wakuStore }",
   },
 ];
diff --git a/package.json b/package.json
index aebf347a73..0ae010f263 100644
--- a/package.json
+++ b/package.json
@@ -133,7 +133,7 @@
     "*.ts": [
       "eslint --fix"
     ],
-    "*.{ts,json,js,md}": [
+    "*.{ts,json,js,md,cjs}": [
       "prettier --write"
     ]
   }
diff --git a/packages/core/src/lib/to_proto_message.ts b/packages/core/src/lib/to_proto_message.ts
index e9bc99aeaf..e4c4f8c49d 100644
--- a/packages/core/src/lib/to_proto_message.ts
+++ b/packages/core/src/lib/to_proto_message.ts
@@ -1,7 +1,7 @@
-import { ProtoMessage } from "@waku/interfaces";
+import { IProtoMessage } from "@waku/interfaces";
 import { WakuMessage as WakuMessageProto } from "@waku/proto";
 
-const EmptyMessage: ProtoMessage = {
+const EmptyMessage: IProtoMessage = {
   payload: undefined,
   contentTopic: undefined,
   version: undefined,
@@ -10,6 +10,6 @@ const EmptyMessage: ProtoMessage = {
   ephemeral: undefined,
 };
 
-export function toProtoMessage(wire: WakuMessageProto): ProtoMessage {
+export function toProtoMessage(wire: WakuMessageProto): IProtoMessage {
   return { ...EmptyMessage, ...wire };
 }
diff --git a/packages/core/src/lib/waku_filter/index.ts b/packages/core/src/lib/waku_filter/index.ts
index 7d7714a659..c8b2ab2b51 100644
--- a/packages/core/src/lib/waku_filter/index.ts
+++ b/packages/core/src/lib/waku_filter/index.ts
@@ -7,10 +7,10 @@ import type { IncomingStreamData } from "@libp2p/interface-registrar";
 import type { Registrar } from "@libp2p/interface-registrar";
 import type {
   Callback,
-  DecodedMessage,
-  Decoder,
   Filter,
-  Message,
+  IDecodedMessage,
+  IDecoder,
+  IMessage,
   ProtocolOptions,
 } from "@waku/interfaces";
 import {
@@ -69,7 +69,7 @@ class WakuFilter implements Filter {
   private subscriptions: Map<string, Callback<any>>;
   private decoders: Map<
     string, // content topic
-    Set<Decoder<any>>
+    Set<IDecoder<any>>
   >;
 
   constructor(public components: FilterComponents, options?: CreateOptions) {
@@ -87,8 +87,8 @@ class WakuFilter implements Filter {
    * @param opts The FilterSubscriptionOpts used to narrow which messages are returned, and which peer to connect to.
    * @returns Unsubscribe function that can be used to end the subscription.
    */
-  async subscribe<T extends DecodedMessage>(
-    decoders: Decoder<T>[],
+  async subscribe<T extends IDecodedMessage>(
+    decoders: IDecoder<T>[],
     callback: Callback<T>,
     opts?: ProtocolOptions
   ): Promise<UnsubscribeFunction> {
@@ -198,7 +198,7 @@ class WakuFilter implements Filter {
         return;
       }
 
-      let msg: Message | undefined;
+      let msg: IMessage | undefined;
       // We don't want to wait for decoding failure, just attempt to decode
       // all messages and do the call back on the one that works
       // noinspection ES6MissingAwait
@@ -225,8 +225,8 @@ class WakuFilter implements Filter {
     this.subscriptions.delete(requestId);
   }
 
-  private addDecoders<T extends DecodedMessage>(
-    decoders: Map<string, Array<Decoder<T>>>
+  private addDecoders<T extends IDecodedMessage>(
+    decoders: Map<string, Array<IDecoder<T>>>
   ): void {
     decoders.forEach((decoders, contentTopic) => {
       const currDecs = this.decoders.get(contentTopic);
@@ -238,8 +238,8 @@ class WakuFilter implements Filter {
     });
   }
 
-  private deleteDecoders<T extends DecodedMessage>(
-    decoders: Map<string, Array<Decoder<T>>>
+  private deleteDecoders<T extends IDecodedMessage>(
+    decoders: Map<string, Array<IDecoder<T>>>
   ): void {
     decoders.forEach((decoders, contentTopic) => {
       const currDecs = this.decoders.get(contentTopic);
diff --git a/packages/core/src/lib/waku_light_push/index.ts b/packages/core/src/lib/waku_light_push/index.ts
index 88c166c652..54c8db3afb 100644
--- a/packages/core/src/lib/waku_light_push/index.ts
+++ b/packages/core/src/lib/waku_light_push/index.ts
@@ -3,9 +3,9 @@ import type { PeerId } from "@libp2p/interface-peer-id";
 import type { Peer } from "@libp2p/interface-peer-store";
 import type { PeerStore } from "@libp2p/interface-peer-store";
 import type {
-  Encoder,
+  IEncoder,
+  IMessage,
   LightPush,
-  Message,
   ProtocolOptions,
   SendResult,
 } from "@waku/interfaces";
@@ -59,8 +59,8 @@ class WakuLightPush implements LightPush {
   }
 
   async push(
-    encoder: Encoder,
-    message: Message,
+    encoder: IEncoder,
+    message: IMessage,
     opts?: ProtocolOptions
   ): Promise<SendResult> {
     const pubSubTopic = opts?.pubSubTopic ? opts.pubSubTopic : this.pubSubTopic;
diff --git a/packages/core/src/lib/waku_message/topic_only_message.ts b/packages/core/src/lib/waku_message/topic_only_message.ts
index 42c89cc6b5..fadf956700 100644
--- a/packages/core/src/lib/waku_message/topic_only_message.ts
+++ b/packages/core/src/lib/waku_message/topic_only_message.ts
@@ -1,10 +1,14 @@
-import type { DecodedMessage, Decoder, ProtoMessage } from "@waku/interfaces";
+import type {
+  IDecodedMessage,
+  IDecoder,
+  IProtoMessage,
+} from "@waku/interfaces";
 import { proto_topic_only_message as proto } from "@waku/proto";
 import debug from "debug";
 
 const log = debug("waku:message:topic-only");
 
-export class TopicOnlyMessage implements DecodedMessage {
+export class TopicOnlyMessage implements IDecodedMessage {
   public payload: undefined;
   public rateLimitProof: undefined;
   public timestamp: undefined;
@@ -17,10 +21,10 @@ export class TopicOnlyMessage implements DecodedMessage {
   }
 }
 
-export class TopicOnlyDecoder implements Decoder<TopicOnlyMessage> {
+export class TopicOnlyDecoder implements IDecoder<TopicOnlyMessage> {
   public contentTopic = "";
 
-  fromWireToProtoObj(bytes: Uint8Array): Promise<ProtoMessage | undefined> {
+  fromWireToProtoObj(bytes: Uint8Array): Promise<IProtoMessage | undefined> {
     const protoMessage = proto.TopicOnlyMessage.decode(bytes);
     log("Message decoded", protoMessage);
     return Promise.resolve({
@@ -34,7 +38,7 @@ export class TopicOnlyDecoder implements Decoder<TopicOnlyMessage> {
   }
 
   async fromProtoObj(
-    proto: ProtoMessage
+    proto: IProtoMessage
   ): Promise<TopicOnlyMessage | undefined> {
     return new TopicOnlyMessage(proto);
   }
diff --git a/packages/core/src/lib/waku_message/version_0.ts b/packages/core/src/lib/waku_message/version_0.ts
index 469fe0be20..48ea0cb05f 100644
--- a/packages/core/src/lib/waku_message/version_0.ts
+++ b/packages/core/src/lib/waku_message/version_0.ts
@@ -1,10 +1,10 @@
 import type {
-  DecodedMessage as IDecodedMessage,
-  Decoder as IDecoder,
-  Encoder as IEncoder,
-  Message,
-  ProtoMessage,
-  RateLimitProof,
+  IDecodedMessage,
+  IDecoder,
+  IEncoder,
+  IMessage,
+  IProtoMessage,
+  IRateLimitProof,
 } from "@waku/interfaces";
 import { proto_message as proto } from "@waku/proto";
 import debug from "debug";
@@ -65,7 +65,7 @@ export class DecodedMessage implements IDecodedMessage {
     return this.proto.version ?? 0;
   }
 
-  get rateLimitProof(): RateLimitProof | undefined {
+  get rateLimitProof(): IRateLimitProof | undefined {
     return this.proto.rateLimitProof;
   }
 }
@@ -73,11 +73,11 @@ export class DecodedMessage implements IDecodedMessage {
 export class Encoder implements IEncoder {
   constructor(public contentTopic: string, public ephemeral: boolean = false) {}
 
-  async toWire(message: Message): Promise<Uint8Array> {
+  async toWire(message: IMessage): Promise<Uint8Array> {
     return proto.WakuMessage.encode(await this.toProtoObj(message));
   }
 
-  async toProtoObj(message: Message): Promise<ProtoMessage> {
+  async toProtoObj(message: IMessage): Promise<IProtoMessage> {
     const timestamp = message.timestamp ?? new Date();
 
     return {
@@ -113,7 +113,7 @@ export function createEncoder(
 export class Decoder implements IDecoder<DecodedMessage> {
   constructor(public contentTopic: string) {}
 
-  fromWireToProtoObj(bytes: Uint8Array): Promise<ProtoMessage | undefined> {
+  fromWireToProtoObj(bytes: Uint8Array): Promise<IProtoMessage | undefined> {
     const protoMessage = proto.WakuMessage.decode(bytes);
     log("Message decoded", protoMessage);
     return Promise.resolve({
@@ -126,7 +126,9 @@ export class Decoder implements IDecoder<DecodedMessage> {
     });
   }
 
-  async fromProtoObj(proto: ProtoMessage): Promise<DecodedMessage | undefined> {
+  async fromProtoObj(
+    proto: IProtoMessage
+  ): Promise<DecodedMessage | undefined> {
     // https://github.com/status-im/js-waku/issues/921
     if (proto.version === undefined) {
       proto.version = 0;
diff --git a/packages/core/src/lib/waku_relay/index.ts b/packages/core/src/lib/waku_relay/index.ts
index 3e8459e6c4..d3a4861ffe 100644
--- a/packages/core/src/lib/waku_relay/index.ts
+++ b/packages/core/src/lib/waku_relay/index.ts
@@ -8,13 +8,13 @@ import type { PeerIdStr, TopicStr } from "@chainsafe/libp2p-gossipsub/types";
 import { SignaturePolicy } from "@chainsafe/libp2p-gossipsub/types";
 import type {
   Callback,
-  Decoder,
-  Encoder,
-  Message,
+  IDecoder,
+  IEncoder,
+  IMessage,
   Relay,
   SendResult,
 } from "@waku/interfaces";
-import { DecodedMessage } from "@waku/interfaces";
+import { IDecodedMessage } from "@waku/interfaces";
 import debug from "debug";
 
 import { DefaultPubSubTopic } from "../constants.js";
@@ -25,8 +25,8 @@ import * as constants from "./constants.js";
 
 const log = debug("waku:relay");
 
-export type Observer<T extends DecodedMessage> = {
-  decoder: Decoder<T>;
+export type Observer<T extends IDecodedMessage> = {
+  decoder: IDecoder<T>;
   callback: Callback<T>;
 };
 
@@ -55,7 +55,7 @@ export type CreateOptions = {
  */
 class WakuRelay extends GossipSub implements Relay {
   pubSubTopic: string;
-  defaultDecoder: Decoder<DecodedMessage>;
+  defaultDecoder: IDecoder<IDecodedMessage>;
   public static multicodec: string = constants.RelayCodecs[0];
 
   /**
@@ -99,7 +99,7 @@ class WakuRelay extends GossipSub implements Relay {
   /**
    * Send Waku message.
    */
-  public async send(encoder: Encoder, message: Message): Promise<SendResult> {
+  public async send(encoder: IEncoder, message: IMessage): Promise<SendResult> {
     const msg = await encoder.toWire(message);
     if (!msg) {
       log("Failed to encode message, aborting publish");
@@ -113,8 +113,8 @@ class WakuRelay extends GossipSub implements Relay {
    *
    * @returns Function to delete the observer
    */
-  addObserver<T extends DecodedMessage>(
-    decoder: Decoder<T>,
+  addObserver<T extends IDecodedMessage>(
+    decoder: IDecoder<T>,
     callback: Callback<T>
   ): () => void {
     const observer = {
diff --git a/packages/core/src/lib/waku_store/index.ts b/packages/core/src/lib/waku_store/index.ts
index 6d9e7545c1..78c890164d 100644
--- a/packages/core/src/lib/waku_store/index.ts
+++ b/packages/core/src/lib/waku_store/index.ts
@@ -6,8 +6,8 @@ import { sha256 } from "@noble/hashes/sha256";
 import { concat, utf8ToBytes } from "@waku/byte-utils";
 import {
   Cursor,
-  DecodedMessage,
-  Decoder,
+  IDecodedMessage,
+  IDecoder,
   Index,
   Store,
 } from "@waku/interfaces";
@@ -128,8 +128,8 @@ class WakuStore implements Store {
    * or if an error is encountered when processing the reply,
    * or if two decoders with the same content topic are passed.
    */
-  async queryOrderedCallback<T extends DecodedMessage>(
-    decoders: Decoder<T>[],
+  async queryOrderedCallback<T extends IDecodedMessage>(
+    decoders: IDecoder<T>[],
     callback: (message: T) => Promise<void | boolean> | boolean | void,
     options?: QueryOptions
   ): Promise<void> {
@@ -177,8 +177,8 @@ class WakuStore implements Store {
    * or if an error is encountered when processing the reply,
    * or if two decoders with the same content topic are passed.
    */
-  async queryCallbackOnPromise<T extends DecodedMessage>(
-    decoders: Decoder<T>[],
+  async queryCallbackOnPromise<T extends IDecodedMessage>(
+    decoders: IDecoder<T>[],
     callback: (
       message: Promise<T | undefined>
     ) => Promise<void | boolean> | boolean | void,
@@ -215,8 +215,8 @@ class WakuStore implements Store {
    * or if an error is encountered when processing the reply,
    * or if two decoders with the same content topic are passed.
    */
-  async *queryGenerator<T extends DecodedMessage>(
-    decoders: Decoder<T>[],
+  async *queryGenerator<T extends IDecodedMessage>(
+    decoders: IDecoder<T>[],
     options?: QueryOptions
   ): AsyncGenerator<Promise<T | undefined>[]> {
     let startTime, endTime;
@@ -295,11 +295,11 @@ class WakuStore implements Store {
   }
 }
 
-async function* paginate<T extends DecodedMessage>(
+async function* paginate<T extends IDecodedMessage>(
   connection: Connection,
   protocol: string,
   queryOpts: Params,
-  decoders: Map<string, Decoder<T>>,
+  decoders: Map<string, IDecoder<T>>,
   cursor?: Cursor
 ): AsyncGenerator<Promise<T | undefined>[]> {
   if (
@@ -404,7 +404,7 @@ export function isDefined<T>(msg: T | undefined): msg is T {
 }
 
 export async function createCursor(
-  message: DecodedMessage,
+  message: IDecodedMessage,
   pubsubTopic: string = DefaultPubSubTopic
 ): Promise<Index> {
   if (
diff --git a/packages/interfaces/src/filter.ts b/packages/interfaces/src/filter.ts
new file mode 100644
index 0000000000..74c8e9c4fd
--- /dev/null
+++ b/packages/interfaces/src/filter.ts
@@ -0,0 +1,14 @@
+import type { IDecodedMessage, IDecoder } from "./message.js";
+import type {
+  Callback,
+  PointToPointProtocol,
+  ProtocolOptions,
+} from "./protocols.js";
+
+export interface Filter extends PointToPointProtocol {
+  subscribe: <T extends IDecodedMessage>(
+    decoders: IDecoder<T>[],
+    callback: Callback<T>,
+    opts?: ProtocolOptions
+  ) => Promise<() => Promise<void>>;
+}
diff --git a/packages/interfaces/src/index.ts b/packages/interfaces/src/index.ts
index b9598d6f6f..3e9c3f3948 100644
--- a/packages/interfaces/src/index.ts
+++ b/packages/interfaces/src/index.ts
@@ -1,247 +1,8 @@
-import type { GossipSub } from "@chainsafe/libp2p-gossipsub";
-import type { Stream } from "@libp2p/interface-connection";
-import type { ConnectionManager } from "@libp2p/interface-connection-manager";
-import type { PeerId } from "@libp2p/interface-peer-id";
-import type { Peer } from "@libp2p/interface-peer-store";
-import type { PeerStore } from "@libp2p/interface-peer-store";
-import type { Registrar } from "@libp2p/interface-registrar";
-import type { Multiaddr } from "@multiformats/multiaddr";
-import { ENR } from "@waku/enr";
-import type { Libp2p } from "libp2p";
-
-export enum Protocols {
-  Relay = "relay",
-  Store = "store",
-  LightPush = "lightpush",
-  Filter = "filter",
-  PeerExchange = "peer-exchange",
-}
-
-export interface PointToPointProtocol {
-  peerStore: PeerStore;
-  peers: () => Promise<Peer[]>;
-}
-export interface Index {
-  digest?: Uint8Array;
-  receivedTime?: bigint;
-  senderTime?: bigint;
-  pubsubTopic?: string;
-}
-
-export type ProtocolOptions = {
-  pubSubTopic?: string;
-  /**
-   * Optionally specify an PeerId for the protocol request. If not included, will use a random peer.
-   */
-  peerId?: PeerId;
-};
-
-export type Callback<T extends Message> = (msg: T) => void | Promise<void>;
-
-export interface Filter extends PointToPointProtocol {
-  subscribe: <T extends DecodedMessage>(
-    decoders: Decoder<T>[],
-    callback: Callback<T>,
-    opts?: ProtocolOptions
-  ) => Promise<() => Promise<void>>;
-}
-
-export interface LightPush extends PointToPointProtocol {
-  push: (
-    encoder: Encoder,
-    message: Message,
-    opts?: ProtocolOptions
-  ) => Promise<SendResult>;
-}
-
-export interface PeerExchange extends PointToPointProtocol {
-  query(
-    params: PeerExchangeQueryParams,
-    callback: (response: PeerExchangeResponse) => Promise<void> | void
-  ): Promise<void>;
-}
-
-export interface PeerExchangeQueryParams {
-  numPeers: number;
-}
-
-export interface PeerExchangeResponse {
-  peerInfos: PeerInfo[];
-}
-
-export interface PeerInfo {
-  ENR?: ENR;
-}
-
-export enum PageDirection {
-  BACKWARD = "backward",
-  FORWARD = "forward",
-}
-
-export interface TimeFilter {
-  startTime: Date;
-  endTime: Date;
-}
-
-export interface PeerExchangeComponents {
-  connectionManager: ConnectionManager;
-  peerStore: PeerStore;
-  registrar: Registrar;
-}
-export type Cursor = {
-  digest?: Uint8Array;
-  senderTime?: bigint;
-  pubsubTopic?: string;
-};
-
-export type StoreQueryOptions = {
-  /**
-   * The direction in which pages are retrieved:
-   * - { @link PageDirection.BACKWARD }: Most recent page first.
-   * - { @link PageDirection.FORWARD }: Oldest page first.
-   *
-   * Note: This does not affect the ordering of messages with the page
-   * (the oldest message is always first).
-   *
-   * @default { @link PageDirection.BACKWARD }
-   */
-  pageDirection?: PageDirection;
-  /**
-   * The number of message per page.
-   */
-  pageSize?: number;
-  /**
-   * Retrieve messages with a timestamp within the provided values.
-   */
-  timeFilter?: TimeFilter;
-  /**
-   * Cursor as an index to start a query from.
-   */
-  cursor?: Cursor;
-} & ProtocolOptions;
-
-export interface Store extends PointToPointProtocol {
-  queryOrderedCallback: <T extends DecodedMessage>(
-    decoders: Decoder<T>[],
-    callback: (message: T) => Promise<void | boolean> | boolean | void,
-    options?: StoreQueryOptions
-  ) => Promise<void>;
-  queryCallbackOnPromise: <T extends DecodedMessage>(
-    decoders: Decoder<T>[],
-    callback: (
-      message: Promise<T | undefined>
-    ) => Promise<void | boolean> | boolean | void,
-    options?: StoreQueryOptions
-  ) => Promise<void>;
-  queryGenerator: <T extends DecodedMessage>(
-    decoders: Decoder<T>[],
-    options?: StoreQueryOptions
-  ) => AsyncGenerator<Promise<T | undefined>[]>;
-}
-
-export interface Relay extends GossipSub {
-  send: (encoder: Encoder, message: Message) => Promise<SendResult>;
-  addObserver: <T extends DecodedMessage>(
-    decoder: Decoder<T>,
-    callback: Callback<T>
-  ) => () => void;
-  getMeshPeers: () => string[];
-}
-
-export interface Waku {
-  libp2p: Libp2p;
-  relay?: Relay;
-  store?: Store;
-  filter?: Filter;
-  lightPush?: LightPush;
-  peerExchange?: PeerExchange;
-
-  dial(peer: PeerId | Multiaddr, protocols?: Protocols[]): Promise<Stream>;
-
-  start(): Promise<void>;
-
-  stop(): Promise<void>;
-
-  isStarted(): boolean;
-}
-
-export interface WakuLight extends Waku {
-  relay: undefined;
-  store: Store;
-  filter: Filter;
-  lightPush: LightPush;
-  peerExchange: PeerExchange;
-}
-
-export interface WakuPrivacy extends Waku {
-  relay: Relay;
-  store: undefined;
-  filter: undefined;
-  lightPush: undefined;
-  peerExchange: undefined;
-}
-
-export interface WakuFull extends Waku {
-  relay: Relay;
-  store: Store;
-  filter: Filter;
-  lightPush: LightPush;
-  peerExchange: PeerExchange;
-}
-
-export interface RateLimitProof {
-  proof: Uint8Array;
-  merkleRoot: Uint8Array;
-  epoch: Uint8Array;
-  shareX: Uint8Array;
-  shareY: Uint8Array;
-  nullifier: Uint8Array;
-  rlnIdentifier: Uint8Array;
-}
-
-/**
- * Interface matching the protobuf library.
- * Field types matches the protobuf type over the wire
- */
-export interface ProtoMessage {
-  payload: Uint8Array | undefined;
-  contentTopic: string | undefined;
-  version: number | undefined;
-  timestamp: bigint | undefined;
-  rateLimitProof: RateLimitProof | undefined;
-  ephemeral: boolean | undefined;
-}
-
-/**
- * Interface for messages to encode and send.
- */
-export interface Message {
-  payload?: Uint8Array;
-  timestamp?: Date;
-  rateLimitProof?: RateLimitProof;
-}
-
-export interface Encoder {
-  contentTopic: string;
-  ephemeral: boolean;
-  toWire: (message: Message) => Promise<Uint8Array | undefined>;
-  toProtoObj: (message: Message) => Promise<ProtoMessage | undefined>;
-}
-
-export interface DecodedMessage {
-  payload: Uint8Array | undefined;
-  contentTopic: string | undefined;
-  timestamp: Date | undefined;
-  rateLimitProof: RateLimitProof | undefined;
-  ephemeral: boolean | undefined;
-}
-
-export interface Decoder<T extends DecodedMessage> {
-  contentTopic: string;
-  fromWireToProtoObj: (bytes: Uint8Array) => Promise<ProtoMessage | undefined>;
-  fromProtoObj: (proto: ProtoMessage) => Promise<T | undefined>;
-}
-
-export interface SendResult {
-  recipients: PeerId[];
-}
+export * from "./filter.js";
+export * from "./light_push.js";
+export * from "./message.js";
+export * from "./peer_exchange.js";
+export * from "./protocols.js";
+export * from "./relay.js";
+export * from "./store.js";
+export * from "./waku.js";
diff --git a/packages/interfaces/src/light_push.ts b/packages/interfaces/src/light_push.ts
new file mode 100644
index 0000000000..2afb674ae9
--- /dev/null
+++ b/packages/interfaces/src/light_push.ts
@@ -0,0 +1,14 @@
+import type { IEncoder, IMessage } from "./message.js";
+import type {
+  PointToPointProtocol,
+  ProtocolOptions,
+  SendResult,
+} from "./protocols.js";
+
+export interface LightPush extends PointToPointProtocol {
+  push: (
+    encoder: IEncoder,
+    message: IMessage,
+    opts?: ProtocolOptions
+  ) => Promise<SendResult>;
+}
diff --git a/packages/interfaces/src/message.ts b/packages/interfaces/src/message.ts
new file mode 100644
index 0000000000..ca2770d399
--- /dev/null
+++ b/packages/interfaces/src/message.ts
@@ -0,0 +1,52 @@
+export interface IRateLimitProof {
+  proof: Uint8Array;
+  merkleRoot: Uint8Array;
+  epoch: Uint8Array;
+  shareX: Uint8Array;
+  shareY: Uint8Array;
+  nullifier: Uint8Array;
+  rlnIdentifier: Uint8Array;
+}
+
+/**
+ * Interface matching the protobuf library.
+ * Field types matches the protobuf type over the wire
+ */
+export interface IProtoMessage {
+  payload: Uint8Array | undefined;
+  contentTopic: string | undefined;
+  version: number | undefined;
+  timestamp: bigint | undefined;
+  rateLimitProof: IRateLimitProof | undefined;
+  ephemeral: boolean | undefined;
+}
+
+/**
+ * Interface for messages to encode and send.
+ */
+export interface IMessage {
+  payload?: Uint8Array;
+  timestamp?: Date;
+  rateLimitProof?: IRateLimitProof;
+}
+
+export interface IEncoder {
+  contentTopic: string;
+  ephemeral: boolean;
+  toWire: (message: IMessage) => Promise<Uint8Array | undefined>;
+  toProtoObj: (message: IMessage) => Promise<IProtoMessage | undefined>;
+}
+
+export interface IDecodedMessage {
+  payload: Uint8Array | undefined;
+  contentTopic: string | undefined;
+  timestamp: Date | undefined;
+  rateLimitProof: IRateLimitProof | undefined;
+  ephemeral: boolean | undefined;
+}
+
+export interface IDecoder<T extends IDecodedMessage> {
+  contentTopic: string;
+  fromWireToProtoObj: (bytes: Uint8Array) => Promise<IProtoMessage | undefined>;
+  fromProtoObj: (proto: IProtoMessage) => Promise<T | undefined>;
+}
diff --git a/packages/interfaces/src/peer_exchange.ts b/packages/interfaces/src/peer_exchange.ts
new file mode 100644
index 0000000000..05359e25da
--- /dev/null
+++ b/packages/interfaces/src/peer_exchange.ts
@@ -0,0 +1,31 @@
+import type { ConnectionManager } from "@libp2p/interface-connection-manager";
+import type { PeerStore } from "@libp2p/interface-peer-store";
+import type { Registrar } from "@libp2p/interface-registrar";
+import { ENR } from "@waku/enr";
+
+import { PointToPointProtocol } from "./protocols.js";
+
+export interface PeerExchange extends PointToPointProtocol {
+  query(
+    params: PeerExchangeQueryParams,
+    callback: (response: PeerExchangeResponse) => Promise<void> | void
+  ): Promise<void>;
+}
+
+export interface PeerExchangeQueryParams {
+  numPeers: number;
+}
+
+export interface PeerExchangeResponse {
+  peerInfos: PeerInfo[];
+}
+
+export interface PeerInfo {
+  ENR?: ENR;
+}
+
+export interface PeerExchangeComponents {
+  connectionManager: ConnectionManager;
+  peerStore: PeerStore;
+  registrar: Registrar;
+}
diff --git a/packages/interfaces/src/protocols.ts b/packages/interfaces/src/protocols.ts
new file mode 100644
index 0000000000..685c6de1a7
--- /dev/null
+++ b/packages/interfaces/src/protocols.ts
@@ -0,0 +1,31 @@
+import type { PeerId } from "@libp2p/interface-peer-id";
+import type { Peer, PeerStore } from "@libp2p/interface-peer-store";
+
+import type { IMessage } from "./message.js";
+
+export enum Protocols {
+  Relay = "relay",
+  Store = "store",
+  LightPush = "lightpush",
+  Filter = "filter",
+  PeerExchange = "peer-exchange",
+}
+
+export interface PointToPointProtocol {
+  peerStore: PeerStore;
+  peers: () => Promise<Peer[]>;
+}
+
+export type ProtocolOptions = {
+  pubSubTopic?: string;
+  /**
+   * Optionally specify an PeerId for the protocol request. If not included, will use a random peer.
+   */
+  peerId?: PeerId;
+};
+
+export type Callback<T extends IMessage> = (msg: T) => void | Promise<void>;
+
+export interface SendResult {
+  recipients: PeerId[];
+}
diff --git a/packages/interfaces/src/relay.ts b/packages/interfaces/src/relay.ts
new file mode 100644
index 0000000000..76d1a76958
--- /dev/null
+++ b/packages/interfaces/src/relay.ts
@@ -0,0 +1,18 @@
+import type { GossipSub } from "@chainsafe/libp2p-gossipsub";
+
+import type {
+  IDecodedMessage,
+  IDecoder,
+  IEncoder,
+  IMessage,
+} from "./message.js";
+import type { Callback, SendResult } from "./protocols.js";
+
+export interface Relay extends GossipSub {
+  send: (encoder: IEncoder, message: IMessage) => Promise<SendResult>;
+  addObserver: <T extends IDecodedMessage>(
+    decoder: IDecoder<T>,
+    callback: Callback<T>
+  ) => () => void;
+  getMeshPeers: () => string[];
+}
diff --git a/packages/interfaces/src/store.ts b/packages/interfaces/src/store.ts
new file mode 100644
index 0000000000..b7d7b355ce
--- /dev/null
+++ b/packages/interfaces/src/store.ts
@@ -0,0 +1,70 @@
+import type { IDecodedMessage, IDecoder } from "./message.js";
+import type { PointToPointProtocol, ProtocolOptions } from "./protocols.js";
+
+export enum PageDirection {
+  BACKWARD = "backward",
+  FORWARD = "forward",
+}
+
+export interface TimeFilter {
+  startTime: Date;
+  endTime: Date;
+}
+
+export interface Index {
+  digest?: Uint8Array;
+  receivedTime?: bigint;
+  senderTime?: bigint;
+  pubsubTopic?: string;
+}
+
+export type Cursor = {
+  digest?: Uint8Array;
+  senderTime?: bigint;
+  pubsubTopic?: string;
+};
+
+export type StoreQueryOptions = {
+  /**
+   * The direction in which pages are retrieved:
+   * - { @link PageDirection.BACKWARD }: Most recent page first.
+   * - { @link PageDirection.FORWARD }: Oldest page first.
+   *
+   * Note: This does not affect the ordering of messages with the page
+   * (the oldest message is always first).
+   *
+   * @default { @link PageDirection.BACKWARD }
+   */
+  pageDirection?: PageDirection;
+  /**
+   * The number of message per page.
+   */
+  pageSize?: number;
+  /**
+   * Retrieve messages with a timestamp within the provided values.
+   */
+  timeFilter?: TimeFilter;
+  /**
+   * Cursor as an index to start a query from.
+   */
+  cursor?: Cursor;
+} & ProtocolOptions;
+
+export interface Store extends PointToPointProtocol {
+  queryOrderedCallback: <T extends IDecodedMessage>(
+    decoders: IDecoder<T>[],
+    callback: (message: T) => Promise<void | boolean> | boolean | void,
+    options?: StoreQueryOptions
+  ) => Promise<void>;
+  queryCallbackOnPromise: <T extends IDecodedMessage>(
+    decoders: IDecoder<T>[],
+    callback: (
+      message: Promise<T | undefined>
+    ) => Promise<void | boolean> | boolean | void,
+    options?: StoreQueryOptions
+  ) => Promise<void>;
+  queryGenerator: <T extends IDecodedMessage>(
+    decoders: IDecoder<T>[],
+    options?: StoreQueryOptions
+  ) => AsyncGenerator<Promise<T | undefined>[]>;
+}
diff --git a/packages/interfaces/src/waku.ts b/packages/interfaces/src/waku.ts
new file mode 100644
index 0000000000..19e0e429ff
--- /dev/null
+++ b/packages/interfaces/src/waku.ts
@@ -0,0 +1,52 @@
+import type { Stream } from "@libp2p/interface-connection";
+import type { PeerId } from "@libp2p/interface-peer-id";
+import type { Multiaddr } from "@multiformats/multiaddr";
+import type { Libp2p } from "libp2p";
+
+import type { Filter } from "./filter.js";
+import type { LightPush } from "./light_push.js";
+import type { PeerExchange } from "./peer_exchange.js";
+import { Protocols } from "./protocols.js";
+import type { Relay } from "./relay.js";
+import type { Store } from "./store.js";
+
+export interface Waku {
+  libp2p: Libp2p;
+  relay?: Relay;
+  store?: Store;
+  filter?: Filter;
+  lightPush?: LightPush;
+  peerExchange?: PeerExchange;
+
+  dial(peer: PeerId | Multiaddr, protocols?: Protocols[]): Promise<Stream>;
+
+  start(): Promise<void>;
+
+  stop(): Promise<void>;
+
+  isStarted(): boolean;
+}
+
+export interface WakuLight extends Waku {
+  relay: undefined;
+  store: Store;
+  filter: Filter;
+  lightPush: LightPush;
+  peerExchange: PeerExchange;
+}
+
+export interface WakuPrivacy extends Waku {
+  relay: Relay;
+  store: undefined;
+  filter: undefined;
+  lightPush: undefined;
+  peerExchange: undefined;
+}
+
+export interface WakuFull extends Waku {
+  relay: Relay;
+  store: Store;
+  filter: Filter;
+  lightPush: LightPush;
+  peerExchange: PeerExchange;
+}
diff --git a/packages/message-encryption/src/ecies.ts b/packages/message-encryption/src/ecies.ts
index 6b73c5f38c..f55b7ca0f0 100644
--- a/packages/message-encryption/src/ecies.ts
+++ b/packages/message-encryption/src/ecies.ts
@@ -3,10 +3,10 @@ import {
   proto,
 } from "@waku/core/lib/waku_message/version_0";
 import type {
-  Decoder as IDecoder,
-  Encoder as IEncoder,
-  Message,
-  ProtoMessage,
+  IDecoder,
+  IEncoder,
+  IMessage,
+  IProtoMessage,
 } from "@waku/interfaces";
 import debug from "debug";
 
@@ -37,14 +37,14 @@ class Encoder implements IEncoder {
     public ephemeral: boolean = false
   ) {}
 
-  async toWire(message: Message): Promise<Uint8Array | undefined> {
+  async toWire(message: IMessage): Promise<Uint8Array | undefined> {
     const protoMessage = await this.toProtoObj(message);
     if (!protoMessage) return;
 
     return proto.WakuMessage.encode(protoMessage);
   }
 
-  async toProtoObj(message: Message): Promise<ProtoMessage | undefined> {
+  async toProtoObj(message: IMessage): Promise<IProtoMessage | undefined> {
     const timestamp = message.timestamp ?? new Date();
     if (!message.payload) {
       log("No payload to encrypt, skipping: ", message);
@@ -98,7 +98,7 @@ class Decoder extends DecoderV0 implements IDecoder<DecodedMessage> {
   }
 
   async fromProtoObj(
-    protoMessage: ProtoMessage
+    protoMessage: IProtoMessage
   ): Promise<DecodedMessage | undefined> {
     const cipherPayload = protoMessage.payload;
 
diff --git a/packages/message-encryption/src/index.ts b/packages/message-encryption/src/index.ts
index 7705df57c3..118e0ade9f 100644
--- a/packages/message-encryption/src/index.ts
+++ b/packages/message-encryption/src/index.ts
@@ -2,7 +2,7 @@ import {
   DecodedMessage as DecodedMessageV0,
   proto,
 } from "@waku/core/lib/waku_message/version_0";
-import type { DecodedMessage as IDecodedMessage } from "@waku/interfaces";
+import type { IDecodedMessage } from "@waku/interfaces";
 
 import {
   generatePrivateKey,
diff --git a/packages/message-encryption/src/symmetric.ts b/packages/message-encryption/src/symmetric.ts
index 794cf47f4f..b177813a5e 100644
--- a/packages/message-encryption/src/symmetric.ts
+++ b/packages/message-encryption/src/symmetric.ts
@@ -3,10 +3,10 @@ import {
   proto,
 } from "@waku/core/lib/waku_message/version_0";
 import type {
-  Decoder as IDecoder,
-  Encoder as IEncoder,
-  Message,
-  ProtoMessage,
+  IDecoder,
+  IEncoder,
+  IMessage,
+  IProtoMessage,
 } from "@waku/interfaces";
 import debug from "debug";
 
@@ -36,14 +36,14 @@ class Encoder implements IEncoder {
     public ephemeral: boolean = false
   ) {}
 
-  async toWire(message: Message): Promise<Uint8Array | undefined> {
+  async toWire(message: IMessage): Promise<Uint8Array | undefined> {
     const protoMessage = await this.toProtoObj(message);
     if (!protoMessage) return;
 
     return proto.WakuMessage.encode(protoMessage);
   }
 
-  async toProtoObj(message: Message): Promise<ProtoMessage | undefined> {
+  async toProtoObj(message: IMessage): Promise<IProtoMessage | undefined> {
     const timestamp = message.timestamp ?? new Date();
     if (!message.payload) {
       log("No payload to encrypt, skipping: ", message);
@@ -96,7 +96,7 @@ class Decoder extends DecoderV0 implements IDecoder<DecodedMessage> {
   }
 
   async fromProtoObj(
-    protoMessage: ProtoMessage
+    protoMessage: IProtoMessage
   ): Promise<DecodedMessage | undefined> {
     const cipherPayload = protoMessage.payload;
 
diff --git a/packages/tests/tests/filter.node.spec.ts b/packages/tests/tests/filter.node.spec.ts
index df2b9eb597..543a122bd4 100644
--- a/packages/tests/tests/filter.node.spec.ts
+++ b/packages/tests/tests/filter.node.spec.ts
@@ -1,7 +1,12 @@
 import { bytesToUtf8, utf8ToBytes } from "@waku/byte-utils";
-import { createDecoder, createEncoder, waitForRemotePeer } from "@waku/core";
+import {
+  createDecoder,
+  createEncoder,
+  DecodedMessage,
+  waitForRemotePeer,
+} from "@waku/core";
 import { createLightNode } from "@waku/create";
-import type { DecodedMessage, WakuLight } from "@waku/interfaces";
+import type { WakuLight } from "@waku/interfaces";
 import { Protocols } from "@waku/interfaces";
 import { expect } from "chai";
 import debug from "debug";
diff --git a/packages/tests/tests/store.node.spec.ts b/packages/tests/tests/store.node.spec.ts
index c7645de550..1f49ec3633 100644
--- a/packages/tests/tests/store.node.spec.ts
+++ b/packages/tests/tests/store.node.spec.ts
@@ -7,7 +7,7 @@ import {
   waitForRemotePeer,
 } from "@waku/core";
 import { createLightNode } from "@waku/create";
-import type { DecodedMessage, Message, WakuLight } from "@waku/interfaces";
+import type { IDecodedMessage, IMessage, WakuLight } from "@waku/interfaces";
 import { Protocols } from "@waku/interfaces";
 import {
   createDecoder as createEciesDecoder,
@@ -74,7 +74,7 @@ describe("Waku Store", () => {
     await waku.dial(await nwaku.getMultiaddrWithId());
     await waitForRemotePeer(waku, [Protocols.Store]);
 
-    const messages: Message[] = [];
+    const messages: IMessage[] = [];
     let promises: Promise<void>[] = [];
     for await (const msgPromises of waku.store.queryGenerator([TestDecoder])) {
       const _promises = msgPromises.map(async (promise) => {
@@ -105,7 +105,7 @@ describe("Waku Store", () => {
     await waku.dial(await nwaku.getMultiaddrWithId());
     await waitForRemotePeer(waku, [Protocols.Store]);
 
-    const messages: Message[] = [];
+    const messages: IMessage[] = [];
     let promises: Promise<void>[] = [];
     for await (const msgPromises of waku.store.queryGenerator([TestDecoder])) {
       const _promises = msgPromises.map(async (promise) => {
@@ -147,10 +147,10 @@ describe("Waku Store", () => {
     const query = waku.store.queryGenerator([TestDecoder]);
 
     // messages in reversed order (first message at last index)
-    const messages: DecodedMessage[] = [];
+    const messages: IDecodedMessage[] = [];
     for await (const page of query) {
       for await (const msg of page.reverse()) {
-        messages.push(msg as DecodedMessage);
+        messages.push(msg as IDecodedMessage);
       }
     }
 
@@ -160,12 +160,12 @@ describe("Waku Store", () => {
     // create cursor to extract messages after the 3rd index
     const cursor = await createCursor(messages[cursorIndex]);
 
-    const messagesAfterCursor: DecodedMessage[] = [];
+    const messagesAfterCursor: IDecodedMessage[] = [];
     for await (const page of waku.store.queryGenerator([TestDecoder], {
       cursor,
     })) {
       for await (const msg of page.reverse()) {
-        messagesAfterCursor.push(msg as DecodedMessage);
+        messagesAfterCursor.push(msg as IDecodedMessage);
       }
     }
 
@@ -201,7 +201,7 @@ describe("Waku Store", () => {
     await waku.dial(await nwaku.getMultiaddrWithId());
     await waitForRemotePeer(waku, [Protocols.Store]);
 
-    const messages: Message[] = [];
+    const messages: IMessage[] = [];
     await waku.store.queryCallbackOnPromise(
       [TestDecoder],
       async (msgPromise) => {
@@ -243,7 +243,7 @@ describe("Waku Store", () => {
     await waitForRemotePeer(waku, [Protocols.Store]);
 
     const desiredMsgs = 14;
-    const messages: Message[] = [];
+    const messages: IMessage[] = [];
     await waku.store.queryCallbackOnPromise(
       [TestDecoder],
       async (msgPromise) => {
@@ -282,7 +282,7 @@ describe("Waku Store", () => {
     await waku.dial(await nwaku.getMultiaddrWithId());
     await waitForRemotePeer(waku, [Protocols.Store]);
 
-    const messages: Message[] = [];
+    const messages: IMessage[] = [];
     await waku.store.queryOrderedCallback(
       [TestDecoder],
       async (msg) => {
@@ -321,7 +321,7 @@ describe("Waku Store", () => {
     await waku.dial(await nwaku.getMultiaddrWithId());
     await waitForRemotePeer(waku, [Protocols.Store]);
 
-    let messages: Message[] = [];
+    let messages: IMessage[] = [];
     await waku.store.queryOrderedCallback(
       [TestDecoder],
       async (msg) => {
@@ -413,7 +413,7 @@ describe("Waku Store", () => {
 
     await waitForRemotePeer(waku2, [Protocols.Store]);
 
-    const messages: DecodedMessage[] = [];
+    const messages: IDecodedMessage[] = [];
     log("Retrieve messages from store");
 
     for await (const msgPromises of waku2.store.queryGenerator([
@@ -482,7 +482,7 @@ describe("Waku Store", () => {
 
     const nwakuPeerId = await nwaku.getPeerId();
 
-    const firstMessages: Message[] = [];
+    const firstMessages: IMessage[] = [];
     await waku.store.queryOrderedCallback(
       [TestDecoder],
       (msg) => {
@@ -496,7 +496,7 @@ describe("Waku Store", () => {
       }
     );
 
-    const bothMessages: Message[] = [];
+    const bothMessages: IMessage[] = [];
     await waku.store.queryOrderedCallback(
       [TestDecoder],
       async (msg) => {
@@ -543,7 +543,7 @@ describe("Waku Store", () => {
     await waitForRemotePeer(waku, [Protocols.Store]);
 
     const desiredMsgs = 14;
-    const messages: Message[] = [];
+    const messages: IMessage[] = [];
     await waku.store.queryOrderedCallback(
       [TestDecoder],
       async (msg) => {
@@ -601,7 +601,7 @@ describe("Waku Store, custom pubsub topic", () => {
     await waku.dial(await nwaku.getMultiaddrWithId());
     await waitForRemotePeer(waku, [Protocols.Store]);
 
-    const messages: Message[] = [];
+    const messages: IMessage[] = [];
     let promises: Promise<void>[] = [];
     for await (const msgPromises of waku.store.queryGenerator([TestDecoder])) {
       const _promises = msgPromises.map(async (promise) => {
diff --git a/packages/tests/tests/waku.node.spec.ts b/packages/tests/tests/waku.node.spec.ts
index 10f372ae2f..e873107f35 100644
--- a/packages/tests/tests/waku.node.spec.ts
+++ b/packages/tests/tests/waku.node.spec.ts
@@ -1,14 +1,13 @@
 import { bootstrap } from "@libp2p/bootstrap";
 import type { PeerId } from "@libp2p/interface-peer-id";
 import { bytesToUtf8, utf8ToBytes } from "@waku/byte-utils";
-import { DefaultUserAgent, waitForRemotePeer } from "@waku/core";
-import { createLightNode, createPrivacyNode } from "@waku/create";
-import type {
+import {
   DecodedMessage,
-  Waku,
-  WakuLight,
-  WakuPrivacy,
-} from "@waku/interfaces";
+  DefaultUserAgent,
+  waitForRemotePeer,
+} from "@waku/core";
+import { createLightNode, createPrivacyNode } from "@waku/create";
+import type { Waku, WakuLight, WakuPrivacy } from "@waku/interfaces";
 import { Protocols } from "@waku/interfaces";
 import {
   createDecoder,