diff --git a/src/functions/proof-of-reserve/proof-of-reserve-functions.ts b/src/functions/proof-of-reserve/proof-of-reserve-functions.ts
index 0aa1b6c..b155189 100644
--- a/src/functions/proof-of-reserve/proof-of-reserve-functions.ts
+++ b/src/functions/proof-of-reserve/proof-of-reserve-functions.ts
@@ -1,7 +1,7 @@
 import { Network } from 'bitcoinjs-lib';
 
 import { RawVault } from '../../models/ethereum-models.js';
-import { isStringDefinedAndNotEmpty } from '../../utilities/index.js';
+import { isNonEmptyString } from '../../utilities/index.js';
 import {
   createTaprootMultisigPayment,
   deriveUnhardenedPublicKey,
@@ -21,10 +21,9 @@ export async function verifyVaultDeposit(
   bitcoinNetwork: Network
 ): Promise<number> {
   try {
-    if (!isStringDefinedAndNotEmpty(vault.wdTxId) && !isStringDefinedAndNotEmpty(vault.fundingTxId))
-      return 0;
+    if (!isNonEmptyString(vault.wdTxId) && !isNonEmptyString(vault.fundingTxId)) return 0;
 
-    const txID = isStringDefinedAndNotEmpty(vault.wdTxId) ? vault.wdTxId : vault.fundingTxId;
+    const txID = isNonEmptyString(vault.wdTxId) ? vault.wdTxId : vault.fundingTxId;
 
     const fundingTransaction = await fetchBitcoinTransaction(txID, bitcoinBlockchainAPI);
 
diff --git a/src/utilities/index.ts b/src/utilities/index.ts
index a2aa465..babfb8f 100644
--- a/src/utilities/index.ts
+++ b/src/utilities/index.ts
@@ -45,7 +45,7 @@ export function isDefined<T>(argument: T | undefined): argument is T {
   return !isUndefined(argument);
 }
 
-export function isStringDefinedAndNotEmpty(string: string | undefined): boolean {
+export function isNonEmptyString(string: string | undefined): boolean {
   return isDefined(string) && string !== '';
 }
 
diff --git a/tests/unit/utility.test.ts b/tests/unit/utility.test.ts
index 0a66af7..9677c9b 100644
--- a/tests/unit/utility.test.ts
+++ b/tests/unit/utility.test.ts
@@ -4,7 +4,7 @@ import {
   customShiftValue,
   delay,
   isDefined,
-  isStringDefinedAndNotEmpty,
+  isNonEmptyString,
   isUndefined,
   reverseBytes,
   shiftValue,
@@ -89,22 +89,22 @@ describe('Utility Functions', () => {
     });
   });
 
-  describe('isStringDefinedAndNotEmpty', () => {
+  describe('isNonEmptyString', () => {
     it('correctly identifies if a string is defined and not empty', () => {
       const value = 'Hello, World!';
-      const isValueDefinedAndNotEmpty = isStringDefinedAndNotEmpty(value);
+      const isValueDefinedAndNotEmpty = isNonEmptyString(value);
       expect(isValueDefinedAndNotEmpty).toBe(true);
     });
 
     it('correctly identifies if a string is not defined', () => {
       const value = undefined;
-      const isValueDefinedAndNotEmpty = isStringDefinedAndNotEmpty(value);
+      const isValueDefinedAndNotEmpty = isNonEmptyString(value);
       expect(isValueDefinedAndNotEmpty).toBe(false);
     });
 
     it('correctly identifies if a string is defined but empty', () => {
       const value = '';
-      const isValueDefinedAndNotEmpty = isStringDefinedAndNotEmpty(value);
+      const isValueDefinedAndNotEmpty = isNonEmptyString(value);
       expect(isValueDefinedAndNotEmpty).toBe(false);
     });
   });