How do I extend convex auth with my custom auth provider?

So idea is to pass 3 things from frontend

singIn("my-custom-provider", {address, message, signature})

singIn("my-custom-provider", {address, message, signature})

and this is where I'm stuck at:

export const { auth, signIn, signOut, store } = convexAuth({
  providers: [
    GitHub,
    ConvexCredentials({
      id: "my-custom-provider"
      authorize: async (credentials, ctx) => {
        const { address, message, signature } = credentials

        const evmAddress = ethers.verifyMessage(message, signature);
        const isVerified = evmAddress === address;

        // ???
      },
    }),
  ],
});

export const { auth, signIn, signOut, store } = convexAuth({
  providers: [
    GitHub,
    ConvexCredentials({
      id: "my-custom-provider"
      authorize: async (credentials, ctx) => {
        const { address, message, signature } = credentials

        const evmAddress = ethers.verifyMessage(message, signature);
        const isVerified = evmAddress === address;

        // ???
      },
    }),
  ],
});

How do I finish this implementation? Should I use ConvexCredentials or should I use something else?

2 Replies

Michal Srb•5mo ago

As the authorize method's signature suggests, you need to return

  {
    userId: GenericId<"users">;
    sessionId?: GenericId<"authSessions">;
  } | null

  {
    userId: GenericId<"users">;
    sessionId?: GenericId<"authSessions">;
  } | null

the sessionId is optional, if you don't return it a session will be created automatically. If you return null the signIn will fail. For example:

export const { auth, signIn, signOut, store } = convexAuth({
  providers: [
    GitHub,
    ConvexCredentials({
      id: "my-custom-provider"
      authorize: async (credentials, ctx) => {
        const { address, message, signature } = credentials

        const evmAddress = ethers.verifyMessage(message, signature);
        const isVerified = evmAddress === address;

        return isVerified ? await ctx.db.runMutation(internal.users.create) : null; 
      },
    }),
  ],
});

export const { auth, signIn, signOut, store } = convexAuth({
  providers: [
    GitHub,
    ConvexCredentials({
      id: "my-custom-provider"
      authorize: async (credentials, ctx) => {
        const { address, message, signature } = credentials

        const evmAddress = ethers.verifyMessage(message, signature);
        const isVerified = evmAddress === address;

        return isVerified ? await ctx.db.runMutation(internal.users.create) : null; 
      },
    }),
  ],
});

kstulgysOP•5mo ago

Thank you sir, just one correction for those who will see this:

const userId = await ctx.db.runMutation(internal.users.create, userData) 
return { userId }

const userId = await ctx.db.runMutation(internal.users.create, userData) 
return { userId }

How do I extend convex auth with my custom auth provider?

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