feat: Farcaster Client

.env.example

@@ -91,6 +91,12 @@ STARKNET_ADDRESS=
 STARKNET_PRIVATE_KEY=
 STARKNET_RPC_URL=
 
+
+# Farcaster
+FARCASTER_HUB_URL=
+FARCASTER_FID=
+FARCASTER_PRIVATE_KEY=
+
 # Coinbase
 COINBASE_COMMERCE_KEY= # from coinbase developer portal
 COINBASE_API_KEY= # from coinbase developer portal
@@ -112,6 +118,7 @@ ZEROG_EVM_RPC=
 ZEROG_PRIVATE_KEY=
 ZEROG_FLOW_ADDRESS=
 
+
 # Coinbase Commerce
 COINBASE_COMMERCE_KEY=
 

packages/client-farcaster/package.json

@@ -0,0 +1,20 @@
+{
+    "name": "@ai16z/client-farcaster",
+    "version": "0.0.1",
+    "main": "dist/index.js",
+    "type": "module",
+    "types": "dist/index.d.ts",
+    "dependencies": {
+        "@ai16z/eliza": "workspace:*",
+        "@farcaster/hub-nodejs": "^0.12.7",
+        "viem": "^2.21.47"
+    },
+    "devDependencies": {
+        "tsup": "^8.3.5"
+    },
+    "scripts": {
+        "build": "tsup --format esm --dts",
+        "dev": "tsup --watch"
+    },
+    "peerDependencies": {}
+}

packages/client-farcaster/src/actions.ts

@@ -0,0 +1,79 @@
+import { CastId, FarcasterNetwork, Signer } from "@farcaster/hub-nodejs";
+import { CastType, makeCastAdd } from "@farcaster/hub-nodejs";
+import type { FarcasterClient } from "./client";
+import type { Content, IAgentRuntime, Memory, UUID } from "@ai16z/eliza";
+import type { Cast, Profile } from "./types";
+import { createCastMemory } from "./memory";
+import { splitPostContent } from "./utils";
+
+export async function sendCast({
+    client,
+    runtime,
+    content,
+    roomId,
+    inReplyTo,
+    signer,
+    profile,
+}: {
+    profile: Profile;
+    client: FarcasterClient;
+    runtime: IAgentRuntime;
+    content: Content;
+    roomId: UUID;
+    signer: Signer;
+    inReplyTo?: CastId;
+}): Promise<{ memory: Memory; cast: Cast }[]> {
+    const chunks = splitPostContent(content.text);
+    const sent: Cast[] = [];
+    let parentCastId = inReplyTo;
+
+    for (const chunk of chunks) {
+        const castAddMessageResult = await makeCastAdd(
+            {
+                text: chunk,
+                embeds: [],
+                embedsDeprecated: [],
+                mentions: [],
+                mentionsPositions: [],
+                type: CastType.CAST, // TODO: check CastType.LONG_CAST
+                parentCastId,
+            },
+            {
+                fid: profile.fid,
+                network: FarcasterNetwork.MAINNET,
+            },
+            signer
+        );
+
+        if (castAddMessageResult.isErr()) {
+            throw castAddMessageResult.error;
+        }
+
+        await client.submitMessage(castAddMessageResult.value);
+
+        const cast = await client.loadCastFromMessage(
+            castAddMessageResult.value
+        );
+
+        sent.push(cast);
+
+        parentCastId = {
+            fid: cast.profile.fid,
+            hash: cast.message.hash,
+        };
+
+        // TODO: check rate limiting
+        // Wait a bit between tweets to avoid rate limiting issues
+        // await wait(1000, 2000);
+    }
+
+    return sent.map((cast) => ({
+        cast,
+        memory: createCastMemory({
+            roomId,
+            agentId: runtime.agentId,
+            userId: runtime.agentId,
+            cast,
+        }),
+    }));
+}

packages/client-farcaster/src/client.ts

@@ -0,0 +1,193 @@
+import { IAgentRuntime } from "@ai16z/eliza";
+import {
+    CastAddMessage,
+    CastId,
+    FidRequest,
+    getInsecureHubRpcClient,
+    getSSLHubRpcClient,
+    HubRpcClient,
+    isCastAddMessage,
+    isUserDataAddMessage,
+    Message,
+    MessagesResponse,
+} from "@farcaster/hub-nodejs";
+import { Cast, Profile } from "./types";
+import { toHex } from "viem";
+import { populateMentions } from "./utils";
+
+export class FarcasterClient {
+    runtime: IAgentRuntime;
+    farcaster: HubRpcClient;
+
+    cache: Map<string, any>;
+
+    constructor(opts: {
+        runtime: IAgentRuntime;
+        url: string;
+        ssl: boolean;
+        cache: Map<string, any>;
+    }) {
+        this.cache = opts.cache;
+        this.runtime = opts.runtime;
+        this.farcaster = opts.ssl
+            ? getSSLHubRpcClient(opts.url)
+            : getInsecureHubRpcClient(opts.url);
+    }
+
+    async submitMessage(cast: Message, retryTimes?: number): Promise<void> {
+        const result = await this.farcaster.submitMessage(cast);
+
+        if (result.isErr()) {
+            throw result.error;
+        }
+    }
+
+    async loadCastFromMessage(message: CastAddMessage): Promise<Cast> {
+        const profileMap = {};
+
+        const profile = await this.getProfile(message.data.fid);
+
+        profileMap[message.data.fid] = profile;
+
+        for (const mentionId of message.data.castAddBody.mentions) {
+            if (profileMap[mentionId]) continue;
+            profileMap[mentionId] = await this.getProfile(mentionId);
+        }
+
+        const text = populateMentions(
+            message.data.castAddBody.text,
+            message.data.castAddBody.mentions,
+            message.data.castAddBody.mentionsPositions,
+            profileMap
+        );
+
+        return {
+            id: toHex(message.hash),
+            message,
+            text,
+            profile,
+        };
+    }
+
+    async getCast(castId: CastId): Promise<Message> {
+        const castHash = toHex(castId.hash);
+
+        if (this.cache.has(`farcaster/cast/${castHash}`)) {
+            return this.cache.get(`farcaster/cast/${castHash}`);
+        }
+
+        const cast = await this.farcaster.getCast(castId);
+
+        if (cast.isErr()) {
+            throw cast.error;
+        }
+
+        this.cache.set(`farcaster/cast/${castHash}`, cast);
+
+        return cast.value;
+    }
+
+    async getCastsByFid(request: FidRequest): Promise<MessagesResponse> {
+        const cast = await this.farcaster.getCastsByFid(request);
+        if (cast.isErr()) {
+            throw cast.error;
+        }
+
+        cast.value.messages.map((cast) => {
+            this.cache.set(`farcaster/cast/${toHex(cast.hash)}`, cast);
+        });
+
+        return cast.value;
+    }
+
+    async getMentions(request: FidRequest): Promise<MessagesResponse> {
+        const cast = await this.farcaster.getCastsByMention(request);
+        if (cast.isErr()) {
+            throw cast.error;
+        }
+
+        cast.value.messages.map((cast) => {
+            this.cache.set(`farcaster/cast/${toHex(cast.hash)}`, cast);
+        });
+
+        return cast.value;
+    }
+
+    async getProfile(fid: number): Promise<Profile> {
+        if (this.cache.has(`farcaster/profile/${fid}`)) {
+            return this.cache.get(`farcaster/profile/${fid}`) as Profile;
+        }
+
+        const result = await this.farcaster.getUserDataByFid({
+            fid: fid,
+            reverse: true,
+        });
+
+        if (result.isErr()) {
+            throw result.error;
+        }
+
+        const profile: Profile = {
+            fid,
+            name: "",
+            signer: "0x",
+            username: "",
+        };
+
+        const userDataBodyType = {
+            1: "pfp",
+            2: "name",
+            3: "bio",
+            5: "url",
+            6: "username",
+            // 7: "location",
+            // 8: "twitter",
+            // 9: "github",
+        } as const;
+
+        for (const message of result.value.messages) {
+            if (isUserDataAddMessage(message)) {
+                if (message.data.userDataBody.type in userDataBodyType) {
+                    const prop =
+                        userDataBodyType[message.data.userDataBody.type];
+                    profile[prop] = message.data.userDataBody.value;
+                }
+            }
+        }
+
+        const [lastMessage] = result.value.messages;
+
+        if (lastMessage) {
+            profile.signer = toHex(lastMessage.signer);
+        }
+
+        this.cache.set(`farcaster/profile/${fid}`, profile);
+
+        return profile;
+    }
+
+    async getTimeline(request: FidRequest): Promise<{
+        timeline: Cast[];
+        nextPageToken?: Uint8Array<ArrayBufferLike> | undefined;
+    }> {
+        const timeline: Cast[] = [];
+
+        const results = await this.getCastsByFid(request);
+
+        for (const message of results.messages) {
+            if (isCastAddMessage(message)) {
+                this.cache.set(
+                    `farcaster/cast/${toHex(message.hash)}`,
+                    message
+                );
+
+                timeline.push(await this.loadCastFromMessage(message));
+            }
+        }
+
+        return {
+            timeline,
+            nextPageToken: results.nextPageToken,
+        };
+    }
+}

packages/client-farcaster/src/index.ts

@@ -0,0 +1,58 @@
+import { Client, IAgentRuntime } from "@ai16z/eliza";
+import { Signer, NobleEd25519Signer } from "@farcaster/hub-nodejs";
+import { Hex, hexToBytes } from "viem";
+import { FarcasterClient } from "./client";
+import { FarcasterPostManager } from "./post";
+import { FarcasterInteractionManager } from "./interactions";
+
+export class FarcasterAgentClient implements Client {
+    client: FarcasterClient;
+    posts: FarcasterPostManager;
+    interactions: FarcasterInteractionManager;
+
+    private signer: Signer;
+
+    constructor(
+        public runtime: IAgentRuntime,
+        client?: FarcasterClient
+    ) {
+        const cache = new Map<string, any>();
+
+        this.signer = new NobleEd25519Signer(
+            hexToBytes(runtime.getSetting("FARCASTER_PRIVATE_KEY")! as Hex)
+        );
+
+        this.client =
+            client ??
+            new FarcasterClient({
+                runtime,
+                ssl: true,
+                url:
+                    runtime.getSetting("FARCASTER_HUB_URL") ??
+                    "hub.pinata.cloud",
+                cache,
+            });
+
+        this.posts = new FarcasterPostManager(
+            this.client,
+            this.runtime,
+            this.signer,
+            cache
+        );
+
+        this.interactions = new FarcasterInteractionManager(
+            this.client,
+            this.runtime,
+            this.signer,
+            cache
+        );
+    }
+
+    async start() {
+        await Promise.all([this.posts.start(), this.interactions.start()]);
+    }
+
+    async stop() {
+        await Promise.all([this.posts.stop(), this.interactions.stop()]);
+    }
+}