Add validation amount on Remit (#27)

packages/xahau/src/models/transactions/remit.ts

@@ -2,7 +2,7 @@ import { ValidationError } from '../../errors'
 import { AmountEntry, MintURIToken } from '../common/xahau'
 import { isHex } from '../utils'
 
-import { BaseTransaction, validateBaseTransaction } from './common'
+import { BaseTransaction, isAmount, validateBaseTransaction } from './common'
 
 const MAX_URI_LENGTH = 512
 const DIGEST_LENGTH = 64
@@ -118,6 +118,10 @@ function checkAmounts(tx: Record<string, unknown>): void {
       throw new ValidationError('Remit: invalid Amounts.AmountEntry')
     }
     // eslint-disable-next-line @typescript-eslint/no-unsafe-member-access -- ignore
+    if (!isAmount(amount.AmountEntry.Amount)) {
+      throw new ValidationError('Remit: invalid Amounts.AmountEntry.Amount')
+    }
+    // eslint-disable-next-line @typescript-eslint/no-unsafe-member-access -- ignore
     if (typeof amount.AmountEntry.Amount === 'string') {
       // eslint-disable-next-line max-depth -- ignore
       if (seenXrp) {

packages/xahau/test/models/remit.test.ts

@@ -157,6 +157,14 @@ describe('Remit', function () {
       'Remit: Duplicate amounts are not allowed',
     )
   })
+  it(`throws w/ Bad Amount`, function () {
+    remit.Amounts = [{ AmountEntry: { Amount: 1234 } }]
+    assert.throws(
+      () => validateRemit(remit),
+      ValidationError,
+      'Remit: invalid Amounts.AmountEntry.Amount',
+    )
+  })
   it(`throws w/ Bad URITokenIDs`, function () {
     remit.URITokenIDs = {}
     assert.throws(