Error: Not implemented: crypto.Sign

import { createClient } from 'https://esm.sh/@supabase/supabase-js@2';
import { JWT } from 'https://esm.sh/google-auth-library@9.4.1';
import serviceAccount from '../service-account.json' assert { type: "json" };


const supabase = createClient(
  Deno.env.get('SUPABASE_URL')!,
  Deno.env.get('SUPABASE_SERVICE_ROLE_KEY')!
)

Deno.serve(async (req) => {
  const payload: WebhookPayload = await req.json()

  const accessToken = await getAccessToken({
    clientEmail: serviceAccount.client_email,
    privateKey: serviceAccount.private_key,
  })

   //...
})

const getAccessToken = ({
  clientEmail,
  privateKey,
}: {
  clientEmail: string
  privateKey: string
}): Promise<string> => {
  return new Promise((resolve, reject) => {
    const jwtClient = new JWT({
      email: clientEmail,
      key: privateKey,
      scopes: ['https://www.googleapis.com/auth/firebase.messaging'],
    })
    jwtClient.authorize((err, tokens) => {
      if (err) {
        reject(err)
        return
      }
      resolve(tokens!.access_token!)
    })
  })
}

import { createClient } from 'https://esm.sh/@supabase/supabase-js@2';
import { JWT } from 'https://esm.sh/google-auth-library@9.4.1';
import serviceAccount from '../service-account.json' assert { type: "json" };


const supabase = createClient(
  Deno.env.get('SUPABASE_URL')!,
  Deno.env.get('SUPABASE_SERVICE_ROLE_KEY')!
)

Deno.serve(async (req) => {
  const payload: WebhookPayload = await req.json()

  const accessToken = await getAccessToken({
    clientEmail: serviceAccount.client_email,
    privateKey: serviceAccount.private_key,
  })

   //...
})

const getAccessToken = ({
  clientEmail,
  privateKey,
}: {
  clientEmail: string
  privateKey: string
}): Promise<string> => {
  return new Promise((resolve, reject) => {
    const jwtClient = new JWT({
      email: clientEmail,
      key: privateKey,
      scopes: ['https://www.googleapis.com/auth/firebase.messaging'],
    })
    jwtClient.authorize((err, tokens) => {
      if (err) {
        reject(err)
        return
      }
      resolve(tokens!.access_token!)
    })
  })
}