add invoke tx

packages/xrpl/src/models/transactions/index.ts

@@ -14,6 +14,7 @@ export { DepositPreauth } from './depositPreauth'
 export { EscrowCancel } from './escrowCancel'
 export { EscrowCreate } from './escrowCreate'
 export { EscrowFinish } from './escrowFinish'
+export { Invoke } from './invoke'
 export { NFTokenAcceptOffer } from './NFTokenAcceptOffer'
 export { NFTokenBurn } from './NFTokenBurn'
 export { NFTokenCancelOffer } from './NFTokenCancelOffer'

packages/xrpl/src/models/transactions/invoke.ts

@@ -0,0 +1,32 @@
+import { ValidationError } from '../../errors'
+
+import { BaseTransaction, validateBaseTransaction } from './common'
+
+/**
+ *
+ *
+ * @category Transaction Models
+ */
+export interface Invoke extends BaseTransaction {
+  TransactionType: 'Invoke'
+  /**
+   * If present, invokes the Hook on the Destination account.
+   */
+  Destination?: string
+}
+
+/**
+ * Verify the form and type of an Invoke at runtime.
+ *
+ * @param tx - An Invoke Transaction.
+ * @throws When the Invoke is Malformed.
+ */
+export function validateInvoke(tx: Record<string, unknown>): void {
+  validateBaseTransaction(tx)
+
+  if (tx.Account === tx.Destination) {
+    throw new ValidationError(
+      'Invoke: Destination and Account must not be equal',
+    )
+  }
+}