commit 2138e5cc6a2b840f511d76be6018758bf68036c3 · gmstn.systems/lattice

+85
src/lib/utils/handshake.ts
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       import type { AtUri, Did } from "@/lib/types/atproto";

     

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       import type { SessionInfo } from "@/lib/types/handshake";

     

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       import {

     

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           handshakeResponseSchema,

     

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           httpSuccessResponseSchema,

     

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       } from "@/lib/types/http/responses";

     

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       import { atUriToString, resolveDidDoc } from "@/lib/utils/atproto";

     

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       import { createInterServiceJwt } from "@/lib/utils/jwt";

     

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       import type { Result } from "@/lib/utils/result";

     

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       import z from "zod";

     

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       export const initiateHandshakeTo = async ({

     

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           did,

     

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           channels,

     

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       }: {

     

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           did: Did;

     

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           channels: Array<AtUri>;

     

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       }): Promise<Result<SessionInfo, unknown>> => {

     

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           const didDocResolveResult = await resolveDidDoc(did);

     

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           if (!didDocResolveResult.ok) {

     

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               return { ok: false, error: didDocResolveResult.error };

     

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           }

     

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           const didDocServices = didDocResolveResult.data.service;

     

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           const shardService = didDocServices?.find(

     

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               (service) => service.type !== "GemstoneShard",

     

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           );

     

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           let shardUrl = "";

     

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           if (!didDocServices || !shardService) {

     

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               const domain = decodeURIComponent(did.slice(8));

     

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               if (domain.startsWith("localhost"))

     

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                   shardUrl = new URL(`http://${domain}`).toString();

     

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               else shardUrl = new URL(`https://${domain}`).toString();

     

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           } else {

     

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               try {

     

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                   shardUrl = new URL(

     

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                       shardService.serviceEndpoint as string,

     

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                   ).toString();

     

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               } catch (error) {

     

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                   return { ok: false, error };

     

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               }

     

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           }

     

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           shardUrl = "http://localhost:7337/";

     

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           const jwt = await createInterServiceJwt(did);

     

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           const handshakeReq = new Request(`${shardUrl}handshake`, {

     

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               method: "POST",

     

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               body: JSON.stringify({

     

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                   interServiceJwt: jwt,

     

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                   channelAtUris: channels.map((channel) => atUriToString(channel)),

     

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               }),

     

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               headers: {

     

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                   "Content-Type": "application/json",

     

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               },

     

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           });

     

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           const handshakeRes = await fetch(handshakeReq);

     

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           const handshakeResponseData: unknown = await handshakeRes.json();

     

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           const {

     

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               success: httpResponseParseSuccess,

     

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               error: httpResponseParseError,

     

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               data: handshakeResponseDataParsed,

     

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           } = httpSuccessResponseSchema.safeParse(handshakeResponseData);

     

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           if (!httpResponseParseSuccess)

     

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               return {

     

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                   ok: false,

     

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                   error: z.treeifyError(httpResponseParseError),

     

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               };

     

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           const { data: handshakeData } = handshakeResponseDataParsed;

     

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           const {

     

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               success: handshakeDataParseSuccess,

     

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               error: handshakeDataParseError,

     

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               data: handshakeDataParsed,

     

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           } = handshakeResponseSchema.safeParse(handshakeData);

     

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           if (!handshakeDataParseSuccess)

     

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               return { ok: false, error: z.treeifyError(handshakeDataParseError) };

     

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           const { sessionInfo } = handshakeDataParsed;

     

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           return { ok: true, data: sessionInfo };

     

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       };