feat: extra protection for AccountDelete transactions (#1626)

* add deletion blockers check to autofill

* add tests

* add fail_hard: true

* pass in account_objects response to error

* only fail_hard for AccountDelete

* reject promise instead of throwing error

* fix rebase issue

src/sugar/autofill.ts

@@ -2,8 +2,12 @@ import BigNumber from 'bignumber.js'
 import { xAddressToClassicAddress, isValidXAddress } from 'ripple-address-codec'
 
 import type { Client } from '..'
-import { ValidationError } from '../errors'
-import { AccountInfoRequest, LedgerRequest } from '../models/methods'
+import { ValidationError, XrplError } from '../errors'
+import {
+  AccountInfoRequest,
+  AccountObjectsRequest,
+  LedgerRequest,
+} from '../models/methods'
 import { Transaction } from '../models/transactions'
 import setTransactionFlagsToNumber from '../models/utils/flags'
 import { xrpToDrops } from '../utils'
@@ -46,6 +50,9 @@ async function autofill<T extends Transaction>(
   if (tx.LastLedgerSequence == null) {
     promises.push(setLatestValidatedLedgerSequence(this, tx))
   }
+  if (tx.TransactionType === 'AccountDelete') {
+    promises.push(checkAccountDeleteBlockers(this, tx))
+  }
 
   return Promise.all(promises).then(() => tx)
 }
@@ -193,4 +200,28 @@ async function setLatestValidatedLedgerSequence(
   tx.LastLedgerSequence = ledgerSequence + LEDGER_OFFSET
 }
 
+async function checkAccountDeleteBlockers(
+  client: Client,
+  tx: Transaction,
+): Promise<void> {
+  const request: AccountObjectsRequest = {
+    command: 'account_objects',
+    account: tx.Account,
+    ledger_index: 'validated',
+    deletion_blockers_only: true,
+  }
+  const response = await client.request(request)
+  return new Promise((resolve, reject) => {
+    if (response.result.account_objects.length > 0) {
+      reject(
+        new XrplError(
+          `Account ${tx.Account} cannot be deleted; there are Escrows, PayChannels, RippleStates, or Checks associated with the account.`,
+          response.result.account_objects,
+        ),
+      )
+    }
+    resolve()
+  })
+}
+
 export default autofill

src/sugar/submit.ts

@@ -51,6 +51,7 @@ async function submitSignedTransaction(
   const request: SubmitRequest = {
     command: 'submit',
     tx_blob: signedTxEncoded,
+    fail_hard: isAccountDelete(signedTransaction),
   }
   return this.request(request)
 }
@@ -63,4 +64,9 @@ function isSigned(transaction: Transaction | string): boolean {
   )
 }
 
+function isAccountDelete(transaction: Transaction | string): boolean {
+  const tx = typeof transaction === 'string' ? decode(transaction) : transaction
+  return tx.TransactionType === 'AccountDelete'
+}
+
 export { submitTransaction, submitSignedTransaction }

test/client/autofill.ts

@@ -1,9 +1,16 @@
 import { assert } from 'chai'
 
-import { AccountDelete, EscrowFinish, Payment, Transaction } from 'xrpl-local'
+import {
+  XrplError,
+  AccountDelete,
+  EscrowFinish,
+  Payment,
+  Transaction,
+} from 'xrpl-local'
 
 import rippled from '../fixtures/rippled'
 import { setupClient, teardownClient } from '../setupClient'
+import { assertRejects } from '../testUtils'
 
 const Fee = '10'
 const Sequence = 1432
@@ -71,6 +78,27 @@ describe('client.autofill', function () {
     assert.strictEqual(txResult.Sequence, 23)
   })
 
+  it('should throw error if account deletion blockers exist', async function () {
+    this.mockRippled.addResponse('account_info', rippled.account_info.normal)
+    this.mockRippled.addResponse('ledger', rippled.ledger.normal)
+    this.mockRippled.addResponse('server_info', rippled.server_info.normal)
+    this.mockRippled.addResponse(
+      'account_objects',
+      rippled.account_objects.normal,
+    )
+
+    const tx: AccountDelete = {
+      Account: 'rf1BiGeXwwQoi8Z2ueFYTEXSwuJYfV2Jpn',
+      TransactionType: 'AccountDelete',
+      Destination: 'X7AcgcsBL6XDcUb289X4mJ8djcdyKaB5hJDWMArnXr61cqZ',
+      Fee,
+      Sequence,
+      LastLedgerSequence,
+    }
+
+    await assertRejects(this.client.autofill(tx), XrplError)
+  })
+
   describe('when autofill Fee is missing', function () {
     it('should autofill Fee of a Transaction', async function () {
       const tx: Transaction = {
@@ -80,17 +108,7 @@ describe('client.autofill', function () {
         Sequence,
         LastLedgerSequence,
       }
-      this.mockRippled.addResponse('server_info', {
-        status: 'success',
-        type: 'response',
-        result: {
-          info: {
-            validated_ledger: {
-              base_fee_xrp: 0.00001,
-            },
-          },
-        },
-      })
+      this.mockRippled.addResponse('server_info', rippled.server_info.normal)
       const txResult = await this.client.autofill(tx)
 
       assert.strictEqual(txResult.Fee, '12')
@@ -108,19 +126,9 @@ describe('client.autofill', function () {
       }
       this.mockRippled.addResponse('account_info', rippled.account_info.normal)
       this.mockRippled.addResponse('ledger', rippled.ledger.normal)
-      this.mockRippled.addResponse('server_info', {
-        status: 'success',
-        type: 'response',
-        result: {
-          info: {
-            validated_ledger: {
-              base_fee_xrp: 0.00001,
-            },
-          },
-        },
-      })
-      const txResult = await this.client.autofill(tx)
+      this.mockRippled.addResponse('server_info', rippled.server_info.normal)
 
+      const txResult = await this.client.autofill(tx)
       assert.strictEqual(txResult.Fee, '399')
     })
 
@@ -132,17 +140,11 @@ describe('client.autofill', function () {
       }
       this.mockRippled.addResponse('account_info', rippled.account_info.normal)
       this.mockRippled.addResponse('ledger', rippled.ledger.normal)
-      this.mockRippled.addResponse('server_info', {
-        status: 'success',
-        type: 'response',
-        result: {
-          info: {
-            validated_ledger: {
-              base_fee_xrp: 0.00001,
-            },
-          },
-        },
-      })
+      this.mockRippled.addResponse('server_info', rippled.server_info.normal)
+      this.mockRippled.addResponse(
+        'account_objects',
+        rippled.account_objects.empty,
+      )
       const txResult = await this.client.autofill(tx)
 
       assert.strictEqual(txResult.Fee, '5000000')
@@ -160,17 +162,7 @@ describe('client.autofill', function () {
       }
       this.mockRippled.addResponse('account_info', rippled.account_info.normal)
       this.mockRippled.addResponse('ledger', rippled.ledger.normal)
-      this.mockRippled.addResponse('server_info', {
-        status: 'success',
-        type: 'response',
-        result: {
-          info: {
-            validated_ledger: {
-              base_fee_xrp: 0.00001,
-            },
-          },
-        },
-      })
+      this.mockRippled.addResponse('server_info', rippled.server_info.normal)
       const txResult = await this.client.autofill(tx, 4)
 
       assert.strictEqual(txResult.Fee, '459')

test/fixtures/rippled/accountObjectsEmpty.json

@@ -0,0 +1,13 @@
+{
+  "id": 1,
+  "status": "success",
+  "type": "response",
+  "result": {
+    "account": "r9cZA1mLK5R5Am25ArfXFmqgNwjZgnfk59",
+    "account_objects": [],
+    "ledger_hash":
+      "053DF17D2289D1C4971C22F235BC1FCA7D4B3AE966F842E5819D0749E0B8ECD3",
+    "ledger_index": 14378733,
+    "validated": true
+  }
+}

test/fixtures/rippled/index.ts

@@ -1,5 +1,6 @@
 import normalAccountInfo from './accountInfo.json'
 import notfoundAccountInfo from './accountInfoNotFound.json'
+import emptyAccountObjects from './accountObjectsEmpty.json'
 import normalAccountObjects from './accountObjectsNormal.json'
 import account_offers from './accountOffers'
 import normalAccountTx from './accountTx'
@@ -133,7 +134,7 @@ const streams = {
 
 const account_objects = {
   normal: normalAccountObjects,
-  //   notfound: notfoundAccountObjects
+  empty: emptyAccountObjects,
 }
 
 const account_info = {