refactor: define typescript type for AccountDelete transaction (#1537)

* refactor: define typescript type for AccountDelete transaction

src/models/transactions/accountDelete.ts

@@ -0,0 +1,28 @@
+import { ValidationError } from "../../common/errors";
+import { BaseTransaction, verifyBaseTransaction } from "./common";
+
+export interface AccountDelete extends BaseTransaction {
+    TransactionType: "AccountDelete";
+    Destination: string;
+    DestinationTag?: number;
+}
+
+/**
+ * Verify the form and type of an AccountDelete at runtime.
+ * 
+ * @param tx - An AccountDelete Transaction
+ * @returns - Void.
+ * @throws - When the AccountDelete is Malformed.
+ */
+ export function verifyAccountDelete(tx: AccountDelete): void {
+    verifyBaseTransaction(tx)
+
+    if (tx.Destination === undefined)
+        throw new ValidationError("AccountDelete: missing field Destination")
+    
+    if (typeof tx.Destination !== 'string')
+        throw new ValidationError("AccountDelete: invalid Destination")
+
+    if (tx.DestinationTag !== undefined && typeof tx.DestinationTag !== 'number')
+        throw new ValidationError("AccountDelete: invalid DestinationTag")
+}

src/models/transactions/index.ts

@@ -5,4 +5,5 @@ export * from './offerCancel'
 export * from './checkCreate'
 export * from './checkCash'
 export * from './checkCancel'
+export * from './accountDelete'
 export * from './signerListSet'

src/models/transactions/transaction.ts

@@ -1,15 +1,16 @@
-import Metadata from "../common/metadata"
-import { OfferCreate } from "./offerCreate"
-import { OfferCancel } from "./offerCancel"
-import { CheckCash } from "./checkCash"
-import { CheckCancel } from "./checkCancel"
-import { CheckCreate } from "./checkCreate"
-import { SignerListSet } from "./signerListSet"
+import Metadata from "../common/metadata";
+import { AccountDelete } from "./accountDelete";
 import { AccountSet } from "./accountSet";
+import { CheckCancel } from "./checkCancel";
+import { CheckCash } from "./checkCash";
+import { CheckCreate } from "./checkCreate";
+import { OfferCancel } from "./offerCancel"
+import { OfferCreate } from "./offerCreate";
+import { SignerListSet } from "./signerListSet";
 
 export type Transaction =
        AccountSet
-//   | AccountDelete
+     | AccountDelete
      | CheckCancel
      | CheckCash
      | CheckCreate

test/models/accountDelete.ts

@@ -0,0 +1,78 @@
+import { ValidationError } from 'xrpl-local/common/errors'
+import { verifyAccountDelete } from './../../src/models/transactions/accountDelete'
+import { assert } from 'chai'
+
+/**
+ * AccountDelete Transaction Verification Testing
+ *
+ * Providing runtime verification testing for each specific transaction type
+ */
+describe('AccountDelete Transaction Verification', function () {
+    
+    it (`verifies valid AccountDelete`, () => {
+        const validAccountDelete = {
+            TransactionType: "AccountDelete",
+            Account: "rWYkbWkCeg8dP6rXALnjgZSjjLyih5NXm",
+            Destination: "rPT1Sjq2YGrBMTttX4GZHjKu9dyfzbpAYe",
+            DestinationTag: 13,
+            Fee: "5000000",
+            Sequence: 2470665,
+            Flags: 2147483648
+        } as any
+        
+        assert.doesNotThrow(() => verifyAccountDelete(validAccountDelete))
+    })
+
+
+    it (`throws w/ missing Destination`, () => {
+        const invalidDestination = {
+            TransactionType: "AccountDelete",
+            Account: "rWYkbWkCeg8dP6rXALnjgZSjjLyih5NXm",
+            Fee: "5000000",
+            Sequence: 2470665,
+            Flags: 2147483648
+        } as any
+
+        assert.throws(
+            () => verifyAccountDelete(invalidDestination),
+            ValidationError,
+            "AccountDelete: missing field Destination"
+        )
+    })
+
+    it (`throws w/ invalid Destination`, () => {
+        const invalidDestination = {
+            TransactionType: "AccountDelete",
+            Account: "rWYkbWkCeg8dP6rXALnjgZSjjLyih5NXm",
+            Destination: 65478965,
+            Fee: "5000000",
+            Sequence: 2470665,
+            Flags: 2147483648
+        } as any
+
+        assert.throws(
+            () => verifyAccountDelete(invalidDestination),
+            ValidationError,
+            "AccountDelete: invalid Destination"
+        )
+    })
+
+    it (`throws w/ invalid DestinationTag`, () => {
+        const invalidDestinationTag = {
+            TransactionType: "AccountDelete",
+            Account: "rWYkbWkCeg8dP6rXALnjgZSjjLyih5NXm",
+            Destination: "rPT1Sjq2YGrBMTttX4GZHjKu9dyfzbpAYe",
+            DestinationTag: "gvftyujnbv",
+            Fee: "5000000",
+            Sequence: 2470665,
+            Flags: 2147483648
+        } as any
+
+        assert.throws(
+            () => verifyAccountDelete(invalidDestinationTag),
+            ValidationError,
+            "AccountDelete: invalid DestinationTag"
+        )
+    })
+
+})