Add testing for assetId access from ExtrinsicPayload (#6033)

* Fix ExtrinsicPayload to return correct assetId as its type

* add tests and cleanup

* revert original deletion and fix test

* remove console

Author: TarikGul

packages/types/src/extrinsic/ExtrinsicPayload.spec.ts

@@ -6,6 +6,7 @@
 import { u8aToHex } from '@polkadot/util';
 
 import { TypeRegistry } from '../create/index.js';
+import { fallbackExtensions } from './signedExtensions/index.js';
 import { GenericExtrinsicPayload as ExtrinsicPayload } from './index.js';
 
 describe('ExtrinsicPayload', (): void => {
@@ -21,6 +22,18 @@ describe('ExtrinsicPayload', (): void => {
     tip: '0x00000000000000000000000000005678'
   };
 
+  const TEST_WITH_ASSET = {
+    address: '5DTestUPts3kjeXSTMyerHihn1uwMfLj8vU8sqF7qYrFabHE',
+    assetId: '0x010002043205011f' as `0x${string}`,
+    blockHash: '0xde8f69eeb5e065e18c6950ff708d7e551f68dc9bf59a07c52367c0280f805ec7',
+    era: '0x0703',
+    genesisHash: '0xdcd1346701ca8396496e52aa2785b1748deb6db09551b72159dcb3e08991025b',
+    method: '0x0600ffd7568e5f0a7eda67a82691ff379ac4bba4f9c9b859fe779b5d46363b61ad2db9e56c',
+    nonce: '0x00001234',
+    specVersion: 123,
+    tip: '0x00000000000000000000000000005678'
+  };
+
   it('creates and can re-create from itself (U8a)', (): void => {
     const a = new ExtrinsicPayload(registry, TEST, { version: 4 });
     const b = new ExtrinsicPayload(registry, a.toU8a(), { version: 4 });
@@ -37,6 +50,27 @@ describe('ExtrinsicPayload', (): void => {
     expect(a.toJSON()).toEqual(b.toJSON());
   });
 
+  it('handles assetId correctly', () => {
+    const reg = new TypeRegistry();
+
+    reg.setSignedExtensions(fallbackExtensions.concat(['ChargeAssetTxPayment']));
+    const ext = new ExtrinsicPayload(reg, TEST_WITH_ASSET, { version: 4 });
+
+    expect(ext.assetId.toJSON()).toEqual({
+      interior: {
+        x2: [
+          {
+            palletInstance: 50
+          },
+          {
+            generalIndex: 1984
+          }
+        ]
+      },
+      parents: 0
+    });
+  });
+
   it('handles toU8a(true) correctly', (): void => {
     expect(
       u8aToHex(

packages/types/src/extrinsic/v4/ExtrinsicPayload.spec.ts

@@ -7,6 +7,7 @@ import rpcMetadata from '@polkadot/types-support/metadata/static-substrate';
 
 import { TypeRegistry } from '../../create/index.js';
 import { decorateExtrinsics, Metadata } from '../../metadata/index.js';
+import { fallbackExtensions } from '../signedExtensions/index.js';
 import { GenericExtrinsicPayloadV4 as ExtrinsicPayload } from './index.js';
 
 const registry = new TypeRegistry();
@@ -36,4 +37,38 @@ describe('ExtrinsicPayload', (): void => {
       ]
     });
   });
+
+  it('correctly decodes assetId', () => {
+    const TEST_WITH_ASSET = {
+      address: '5DTestUPts3kjeXSTMyerHihn1uwMfLj8vU8sqF7qYrFabHE',
+      assetId: '0x0002043205011f' as `0x${string}`,
+      blockHash: '0xde8f69eeb5e065e18c6950ff708d7e551f68dc9bf59a07c52367c0280f805ec7',
+      era: '0x0703',
+      genesisHash: '0xdcd1346701ca8396496e52aa2785b1748deb6db09551b72159dcb3e08991025b',
+      method: '0x0600ffd7568e5f0a7eda67a82691ff379ac4bba4f9c9b859fe779b5d46363b61ad2db9e56c',
+      nonce: '0x00001234',
+      specVersion: 123,
+      tip: '0x00000000000000000000000000005678',
+      transactionVersion: '0x00'
+    };
+
+    const reg = new TypeRegistry();
+
+    reg.setSignedExtensions(fallbackExtensions.concat(['ChargeAssetTxPayment']));
+    const ext = new ExtrinsicPayload(reg, TEST_WITH_ASSET);
+
+    expect(ext.assetId.toJSON()).toEqual({
+      interior: {
+        x2: [
+          {
+            palletInstance: 50
+          },
+          {
+            generalIndex: 1984
+          }
+        ]
+      },
+      parents: 0
+    });
+  });
 });