/**
 * XRP Ledger Batch Transactions Tutorial
 *
 * This tutorial demonstrates how to use the Batch transaction feature (XLS-56)
 * to perform a multi-account batch transaction.
*/

import xrpl from "xrpl"
import { BatchFlags } from 'xrpl/dist/npm/models/transactions/batch.js'
import { GlobalFlags } from 'xrpl/dist/npm/models/transactions/common.js'
import { signMultiBatch, combineBatchSigners } from 'xrpl/dist/npm/Wallet/batchSigner.js'

const client = new xrpl.Client("wss://s.devnet.rippletest.net:51233/")
await client.connect()

// Create and fund wallets
console.log("Funding new wallets from faucet...")
const { wallet: alice } = await client.fundWallet()
const { wallet: bob } = await client.fundWallet()
const { wallet: charlie } = await client.fundWallet()
const { wallet: thirdPartyWallet } = await client.fundWallet()

console.log(`Alice: ${alice.address}, Balance: ${await client.getXrpBalance(alice.address)} XRP`)
console.log(`Bob: ${bob.address}, Balance: ${await client.getXrpBalance(bob.address)} XRP`)
console.log(`Charlie: ${charlie.address}, Balance: ${await client.getXrpBalance(charlie.address)} XRP`)
console.log(`Third-party wallet: ${thirdPartyWallet.address}, Balance: ${await client.getXrpBalance(thirdPartyWallet.address)} XRP`)

// Create inner transactions  --------------------------------------------
// REQUIRED: Inner transactions MUST have the tfInnerBatchTxn flag (0x40000000).
// This marks them as part of a batch (allows Fee: 0 and empty SigningPubKey).

// Transaction 1: Charlie pays Alice
const charliePayment = {
  TransactionType: "Payment",
  Account: charlie.address,
  Destination: alice.address,
  Amount: xrpl.xrpToDrops(50),
  Flags: GlobalFlags.tfInnerBatchTxn // THIS IS REQUIRED
}

// Transaction 2: Bob pays Alice
const bobPayment = {
  TransactionType: "Payment",
  Account: bob.address,
  Destination: alice.address,
  Amount: xrpl.xrpToDrops(50),
  Flags: GlobalFlags.tfInnerBatchTxn // THIS IS REQUIRED
}

// Send Batch transaction --------------------------------------------
console.log("\nCreating batch transaction:")
const batchTx = {
  TransactionType: "Batch",
  Account: thirdPartyWallet.address,
  Flags: BatchFlags.tfAllOrNothing, // tfAllOrNothing: All inner transactions must succeed
  RawTransactions: [
    { RawTransaction: charliePayment },
    { RawTransaction: bobPayment },
  ]
}
console.log(JSON.stringify(batchTx, null, 2))

// Validate the transaction structure
xrpl.validate(batchTx)

// Set the expected number of signers for this transaction.
// "autofill" will automatically add Fee: "0" and SigningPubKey: "".
const autofilledBatchTx = await client.autofill(batchTx, 2)

// Gather batch signatures --------------------------------
// Each signer needs their own tx copy because signMultiBatch modifies the object.
// Charlie signs the Batch transaction
const charlieBatch = { ...autofilledBatchTx }
signMultiBatch(charlie, charlieBatch)

// Bob signs the Batch transaction
const bobBatch = { ...autofilledBatchTx }
signMultiBatch(bob, bobBatch)

// Combine inner transaction signatures.
// This returns a signed transaction blob (hex string) ready for submission.
const combinedSignedTx = combineBatchSigners([charlieBatch, bobBatch])

// Submit the signed blob with the third-party's wallet
console.log("\nSubmitting batch transaction...")
const submitResponse = await client.submitAndWait(combinedSignedTx, 
  { wallet: thirdPartyWallet }
)

// Check Batch transaction result --------------------------------
if (submitResponse.result.meta.TransactionResult !== "tesSUCCESS") {
  const resultCode = submitResponse.result.meta.TransactionResult
  console.warn(`\nTransaction failed with result code ${resultCode}`)
  process.exit(1)
}

console.log("\nBatch transaction submitted successfully!")
console.log("Result:\n", JSON.stringify(submitResponse.result, null, 2))

// Verify balances after transaction
console.log("\nFinal balances after batch transaction:")
console.log(`Alice: ${alice.address}, Balance: ${await client.getXrpBalance(alice.address)} XRP`)
console.log(`Bob: ${bob.address}, Balance: ${await client.getXrpBalance(bob.address)} XRP`)
console.log(`Charlie: ${charlie.address}, Balance: ${await client.getXrpBalance(charlie.address)} XRP`)
console.log(`Third-party wallet: ${thirdPartyWallet.address}, Balance: ${await client.getXrpBalance(thirdPartyWallet.address)} XRP`)

// View the transaction on the XRPL Explorer 
console.log(`\nTransaction URL:\nhttps://devnet.xrpl.org/transactions/${submitResponse.result.hash}`)

await client.disconnect()