Fix AccountRoot ledger object (#3010)

* fix AccountRoot ledger object

* update HISTORY.md

* fix import and lint errors

* request a validated ledger

Author: Patel-Raj11

packages/xrpl/HISTORY.md

@@ -4,6 +4,9 @@ Subscribe to [the **xrpl-announce** mailing list](https://groups.google.com/g/xr
 
 ## Unreleased
 
+### Fixed
+* Fix `AccountRoot` ledger object to correctly parse `FirstNFTokenSequence` field.
+
 ## 4.3.0 (2025-6-09)
 
 ### Added

packages/xrpl/src/models/ledger/AccountRoot.ts

@@ -73,7 +73,7 @@ export default interface AccountRoot extends BaseLedgerEntry, HasPreviousTxnID {
   /** Total NFTokens this account's issued that have been burned. This number is always equal or less than MintedNFTokens. */
   BurnedNFTokens?: number
   /** The sequence that the account first minted an NFToken */
-  FirstNFTSequence: number
+  FirstNFTokenSequence?: number
   /** Total NFTokens have been minted by and on behalf of this account. */
   MintedNFTokens?: number
   /** Another account that can mint NFTokens on behalf of this account. */

packages/xrpl/test/integration/transactions/nftokenMint.test.ts

@@ -1,6 +1,7 @@
 import { assert } from 'chai'
 
 import {
+  AccountInfoRequest,
   convertStringToHex,
   getNFTokenID,
   NFTokenMint,
@@ -48,6 +49,8 @@ describe('NFTokenMint', function () {
       )
       assert.equal(response.type, 'response')
 
+      const mintTransactionSeq = response.result.tx_json.Sequence
+
       const txRequest: TxRequest = {
         command: 'tx',
         transaction: hashSignedTx(response.result.tx_blob),
@@ -93,6 +96,26 @@ describe('NFTokenMint', function () {
         getNFTokenID(binaryTxResponse.result.meta_blob) ?? 'undefined',
         `getNFTokenID produced a different outcome when decoding the metadata in binary format.`,
       )
+
+      // Check if AccountRoot ledger object reflects minted token
+      const accountInfoRequest: AccountInfoRequest = {
+        command: 'account_info',
+        account: testContext.wallet.address,
+        ledger_index: 'validated',
+      }
+      const accountInfoResponse = await testContext.client.request(
+        accountInfoRequest,
+      )
+      assert.equal(
+        accountInfoResponse.result.account_data.FirstNFTokenSequence,
+        mintTransactionSeq,
+        `FirstNFTokenSequence is not same as NFTokenMint's transaction sequence.`,
+      )
+      assert.equal(
+        accountInfoResponse.result.account_data.MintedNFTokens,
+        1,
+        `MintedNFTokens is not 1.`,
+      )
     },
     TIMEOUT,
   )