Expected data to be a string, Uint8Array or ArrayBuffer

When attempting to upload a file to arlocal in node.js I get the following error

Error: Expected data to be a string, Uint8Array or ArrayBuffer

It looks like I am passing an ArrayBuffer:

const Arweave = require('arweave')
const arweave = Arweave.init({
  host: '127.0.0.1',
  port: 1984,
  protocol: 'http',
})

async function createTransaction(arrayBuffer: ArrayBuffer) {
    if (!arrayBuffer) return

    try {
      // generate test wallet
      const key = await arweave.wallets.generate()

      /* creates and sends transaction to Arweave */
      const transaction = await arweave.createTransaction({ data: arrayBuffer }, key)
      await arweave.transactions.sign(transaction, key)
      const uploader = await arweave.transactions.getUploader(transaction)

      /* upload indicator */
      while (!uploader.isComplete) {
        //
        await uploader.uploadChunk()
      }
      return transaction.id
    } catch (err) {
      console.log('createTransaction error: ', (err))
    }
  }
  
  const file = await admin.storage().bucket('my-bucket').file(filePath).download();
  // typecast to Array Buffer
  const ab = file as unknown as ArrayBuffer;

  const id = await createTransaction(ab)

What am I doing wrong?

[rosmcmahon]

looks like an array buffer

is that a buffer inside of an array? [ buffer ] i would definitely take a look at what is being returned before passing to arweave-js. i think maybe Typescript is trying to help you, which is why you had to force it by using as unknown.

in theory you would just need to change this line here, destructuring to: const [ file ] = await admin.storage().bucket('my-bucket').file(filePath).download();

[cedriking]

Hey @cormacncheese , I haven’t used GCS with Arweave so not sure what is happening here. But, I also think this is related to not sending the right data type.

You can always give a try to submit the tx to mainnet too, to see what happens. Should receive the same error message.