diff --git a/keyserver/src/responders/farcaster-webhook-responders.js b/keyserver/src/responders/farcaster-webhook-responders.js index 900623f6a..bc094d6cd 100644 --- a/keyserver/src/responders/farcaster-webhook-responders.js +++ b/keyserver/src/responders/farcaster-webhook-responders.js @@ -1,327 +1,330 @@ // @flow import { createHmac } from 'crypto'; import type { $Request } from 'express'; import invariant from 'invariant'; import bots from 'lib/facts/bots.js'; import { inviteLinkURL } from 'lib/facts/links.js'; import { extractKeyserverIDFromID } from 'lib/keyserver-conn/keyserver-call-utils.js'; import { createSidebarThreadName } from 'lib/shared/sidebar-utils.js'; import { type NeynarWebhookCastCreatedEvent } from 'lib/types/farcaster-types.js'; import { messageTypes } from 'lib/types/message-types-enum.js'; import { threadTypes } from 'lib/types/thread-types-enum.js'; import { type NewThreadResponse } from 'lib/types/thread-types.js'; import { neynarWebhookCastCreatedEventValidator } from 'lib/types/validators/farcaster-webhook-validators.js'; import { ServerError } from 'lib/utils/errors.js'; import { assertWithValidator } from 'lib/utils/validation-utils.js'; import { getFarcasterChannelTagBlob, createOrUpdateFarcasterChannelTag, farcasterChannelTagBlobValidator, } from '../creators/farcaster-channel-tag-creator.js'; import { createOrUpdatePublicLink } from '../creators/invite-link-creator.js'; import createMessages from '../creators/message-creator.js'; import { createThread } from '../creators/thread-creator.js'; import { fetchServerThreadInfos } from '../fetchers/thread-fetchers.js'; import { createBotViewer } from '../session/bots.js'; import { createScriptViewer } from '../session/scripts.js'; import { changeRole, commitMembershipChangeset, } from '../updaters/thread-permission-updaters.js'; import { updateRole, joinThread } from '../updaters/thread-updaters.js'; import { thisKeyserverAdmin, thisKeyserverID } from '../user/identity.js'; import { getFarcasterBotConfig } from '../utils/farcaster-bot.js'; import { getVerifiedUserIDForFID } from '../utils/farcaster-utils.js'; import { neynarClient } from '../utils/fc-cache.js'; import { getNeynarConfig } from '../utils/neynar-utils.js'; const taggedCommFarcasterInputValidator = neynarWebhookCastCreatedEventValidator; const threadHashTagRegex = /\B#createathread\b/i; const noChannelCommunityID = '80887273'; const { commbot } = bots; const commbotViewer = createBotViewer(commbot.userID); async function createCastSidebar( sidebarCastHash: string, channelName: ?string, channelCommunityID: string, taggerUserID: ?string, ): Promise { const sidebarCast = await neynarClient?.fetchFarcasterCastByHash(sidebarCastHash); if (!sidebarCast) { return null; } const { author: { username: castAuthor }, text: castText, } = sidebarCast; + const warpcastLink = `https://warpcast.com/${castAuthor}/${sidebarCastHash}`; + const saidText = `[said](${warpcastLink})`; const channelText = channelName ? ` in channel ${channelName}` : ''; - const messageText = `${castAuthor} said "${castText}"${channelText}`; + + const messageText = `${castAuthor} ${saidText} "${castText}"${channelText}`; let viewer = commbotViewer; if (taggerUserID) { viewer = createScriptViewer(taggerUserID); await joinThread(viewer, { threadID: channelCommunityID, }); } else { const changeset = await changeRole( channelCommunityID, [commbot.userID], -1, ); await commitMembershipChangeset(viewer, changeset); } const [{ id: messageID }] = await createMessages(viewer, [ { type: messageTypes.TEXT, threadID: channelCommunityID, creatorID: viewer.id, time: Date.now(), text: messageText, }, ]); invariant( messageID, 'message returned from createMessages always has ID set', ); const sidebarThreadName = createSidebarThreadName(messageText); const response = await createThread( viewer, { type: threadTypes.SIDEBAR, parentThreadID: channelCommunityID, name: sidebarThreadName, sourceMessageID: messageID, }, { addViewerAsGhost: !taggerUserID, }, ); return response; } async function createTaggedFarcasterCommunity( channelID: string, taggerUserID: ?string, ): Promise { const keyserverAdminPromise = thisKeyserverAdmin(); const neynarChannel = await neynarClient?.fetchFarcasterChannelByID(channelID); if (!neynarChannel) { throw new ServerError('channel_not_found'); } const leadFID = neynarChannel.lead.fid.toString(); const [leadUserID, keyserverAdmin] = await Promise.all([ getVerifiedUserIDForFID(leadFID), keyserverAdminPromise, ]); const communityAdminID = leadUserID ? leadUserID : taggerUserID || keyserverAdmin.id; const initialMemberIDs = [ ...new Set([leadUserID, taggerUserID, communityAdminID].filter(Boolean)), ]; const newThreadResponse = await createThread( commbotViewer, { type: threadTypes.COMMUNITY_ROOT, name: neynarChannel.name, initialMemberIDs, }, { forceAddMembers: true, addViewerAsGhost: true, }, ); const { newThreadID } = newThreadResponse; const fetchThreadResult = await fetchServerThreadInfos({ threadID: newThreadResponse.newThreadID, }); const threadInfo = fetchThreadResult.threadInfos[newThreadID]; if (!threadInfo) { throw new ServerError('fetch_failed'); } const adminRoleID = Object.keys(threadInfo.roles).find( roleID => threadInfo.roles[roleID].name === 'Admins', ); if (!adminRoleID) { throw new ServerError('community_missing_admin'); } await updateRole(commbotViewer, { threadID: newThreadID, memberIDs: [communityAdminID], role: adminRoleID, }); await createOrUpdateFarcasterChannelTag(commbotViewer, { commCommunityID: newThreadResponse.newThreadID, farcasterChannelID: channelID, }); return newThreadResponse; } async function verifyNeynarWebhookSignature( signature: string, event: NeynarWebhookCastCreatedEvent, ): Promise { const neynarSecret = await getNeynarConfig(); if (!neynarSecret?.neynarWebhookSecret) { throw new ServerError('missing_webhook_secret'); } const hmac = createHmac('sha512', neynarSecret.neynarWebhookSecret); hmac.update(JSON.stringify(event)); return hmac.digest('hex') === signature; } async function taggedCommFarcasterResponder(req: $Request): Promise { const { body } = req; const event = assertWithValidator(body, taggedCommFarcasterInputValidator); const { author: { fid: eventTaggerFID }, text: eventText, channel: eventChannel, } = event.data; const foundCreateThreadHashTag = threadHashTagRegex.test(eventText); if (!foundCreateThreadHashTag) { return; } const neynarConfigPromise = getNeynarConfig(); const taggerUserIDPromise = getVerifiedUserIDForFID( eventTaggerFID.toString(), ); const signature = req.header('X-Neynar-Signature'); if (!signature) { throw new ServerError('missing_neynar_signature'); } const [isValidSignature, farcasterBotConfig] = await Promise.all([ verifyNeynarWebhookSignature(signature, event), getFarcasterBotConfig(), ]); if (!isValidSignature) { throw new ServerError('invalid_webhook_signature'); } const eventChannelID = eventChannel?.id; const isAuthoritativeFarcasterBot = farcasterBotConfig.authoritativeFarcasterBot; if (!eventChannelID && !isAuthoritativeFarcasterBot) { return; } let channelCommunityID = noChannelCommunityID; if (eventChannelID) { const blobDownload = await getFarcasterChannelTagBlob(eventChannelID); if (blobDownload.found) { const blobText = await blobDownload.blob.text(); const blobObject = JSON.parse(blobText); const farcasterChannelTagBlob = assertWithValidator( blobObject, farcasterChannelTagBlobValidator, ); const { commCommunityID } = farcasterChannelTagBlob; const commCommunityKeyserverID = extractKeyserverIDFromID(commCommunityID); const keyserverID = await thisKeyserverID(); if (keyserverID !== commCommunityKeyserverID) { return; } channelCommunityID = commCommunityID.split('|')[1]; } else if (!blobDownload.found && blobDownload.status === 404) { if (!isAuthoritativeFarcasterBot) { return; } const taggerUserID = await taggerUserIDPromise; const newThreadResponse = await createTaggedFarcasterCommunity( eventChannelID, taggerUserID, ); channelCommunityID = newThreadResponse.newThreadID; } else { throw new ServerError('blob_fetch_failed'); } } const { hash: castHash, parent_hash: parentHash } = event.data; const taggerUserID = await taggerUserIDPromise; // we use the parent cast to create the sidebar source message if it exists const sidebarCastHash = parentHash ?? castHash; const sidebarThreadResponse = await createCastSidebar( sidebarCastHash, eventChannel?.name, channelCommunityID, taggerUserID, ); if (!sidebarThreadResponse) { return; } const inviteLinkName = Math.random().toString(36).slice(-9); const [inviteLink, neynarConfig] = await Promise.all([ createOrUpdatePublicLink(commbotViewer, { name: inviteLinkName, communityID: channelCommunityID, threadID: sidebarThreadResponse.newThreadID, }), neynarConfigPromise, ]); const introText = 'I created a thread on Comm. Join the conversation here:'; const replyText = `${introText} ${inviteLinkURL(inviteLink.name)}`; if (!neynarConfig?.signerUUID) { throw new ServerError('missing_signer_uuid'); } const postCastResponse = await neynarClient?.postCast( neynarConfig.signerUUID, castHash, replyText, ); if (!postCastResponse?.success) { throw new ServerError('post_cast_failed'); } } export { taggedCommFarcasterResponder, taggedCommFarcasterInputValidator };