Batch sending

batch.ts

import {
  PrivateKey,
  Mina,
  isReady,
  shutdown,
  PublicKey,
  UInt64,
  AccountUpdate,
  UInt32,
} from 'snarkyjs';
import * as fs from 'fs';

await isReady;

// Use MinaExplorer GraphQL endpoint
let Berkeley = Mina.BerkeleyQANet('https://proxy.berkeley.minaexplorer.com/graphql');
Mina.setActiveInstance(Berkeley);

let nonce = 456;

// Fee payer key this is B62qij84rwTzzTiompizumg46WFAGgQ7bss7ephB47xxag8oDaDsGhX
// These are throwaway testnet keys, intentionally left in so easy to replicate - don't use these outside of this script
// This uses the same account to pay fees and also to send funds
let feePayerKey = PrivateKey.fromBase58(
  'EKEEvWvRxGzLmb4RY2EFtMMxr2tAbKUnmMUBh6K5iv73VjnassXH'
);
let feePayerAddress = feePayerKey.toPublicKey();

// These are the precalculated values that we have determined via a payout script to send
let zkAppSendAddresses = [
  {
    publicKey: 'B62qmQsEHcsPUs5xdtHKjEmWqqhUPRSF2GNmdguqnNvpEZpKftPC69e',
    total: 100_000,
  },
];

// Transaction fee to use
let transactionFee = 100_000_000;

// This will increment the nonce for the zkApp tx
for (let i = nonce; i < nonce + 5; i = i + 1) {
  console.log('Making a transfer');
  let tx = await Mina.transaction(
    {
      feePayerKey,
      fee: transactionFee,
      memo: 'Constrain nonce',
      nonce: i,
    },
    () => {
      let payer = AccountUpdate.create(feePayerAddress);
      for (let [key, value] of Object.entries(zkAppSendAddresses)) {
        payer.send({
          to: PublicKey.fromBase58(value['publicKey']),
          amount: UInt64.from(value['total']),
        });
      }
      // This doesn't work, maybe another way to do this...
      //payer.account.nonce.assertEquals(UInt32.from(i+1));
      payer.sign(feePayerKey);
    }
  );

  // Need to sign the transaction before broadcast
  tx.sign();

  // Write this to a file so we can broadcast seperately
  fs.writeFileSync('payments/' + i + '.json', tx.toGraphqlQuery());

  // Sending the transaction to debug
  await tx.send().wait();
}

shutdown();