const {
  signer,
  BatchEncoder,
  TransactionEncoder
} = require('sawtooth-sdk/signing')
const {createHash}  = require('crypto')
const {protobuf}    = require('sawtooth-sdk/protobuf')
// Submit signed Transaction to validator
const submitUpdate = (payload, privateKey, cb) => {

  const transactionHeaderBytes = protobuf.TransactionHeader.encode({
    familyName: 'intkey',
    familyVersion: '1.0',
    inputs: ['1cf1266e282c41be5e4254d8820772c5518a2c5a8c0c7f7eda19594a7eb539453e1ed7'],
    outputs: ['1cf1266e282c41be5e4254d8820772c5518a2c5a8c0c7f7eda19594a7eb539453e1ed7'],
    signerPublicKey: signer.getPublicKey().asHex(),
    // In this example, we're signing the batch with the same private key,
    // but the batch can be signed by another party, in which case, the
    // public key will need to be associated with that key.
    batcherPublicKey: signer.getPublicKey().asHex(),
    // In this example, there are no dependencies.  This list should include
    // an previous transaction header signatures that must be applied for
    // this transaction to successfully commit.
    // For example,
    // dependencies: ['540a6803971d1880ec73a96cb97815a95d374cbad5d865925e5aa0432fcf1931539afe10310c122c5eaae15df61236079abbf4f258889359c4d175516934484a'],
    dependencies: [],
    payloadSha512: createHash('sha512').update(payloadBytes).digest('hex')
  }).finish()
  const transaction = new TransactionEncoder(privateKey, {
    inputs: [PREFIX],
    outputs: [PREFIX],
    familyName: FAMILY,
    familyVersion: VERSION,
    payloadEncoding: 'application/json',
    payloadEncoder: p => Buffer.from(JSON.stringify(p))
  }).create(payload)

  // const batchBytes = new BatchEncoder(privateKey).createEncoded(transaction)

  $.post({
    url: `${API_URL}/batches?wait`,
    data: batchBytes,
    headers: {'Content-Type': 'application/octet-stream'},
    processData: false,
    // Any data object indicates the Batch was not committed
    success: ({ data }) => cb(!data),
    error: () => cb(false)
  })
}