diff --git a/packages/core/test/fixtures/transaction.ts b/packages/core/test/fixtures/transaction.ts
index dd37f30..a8156d8 100644
--- a/packages/core/test/fixtures/transaction.ts
+++ b/packages/core/test/fixtures/transaction.ts
@@ -20,6 +20,9 @@ export const validTransactions = [
                     script: '76a914c42e7ef92fdb603af844d064faad95db9bcdfd3d88ac',
                 },
             ],
+            inPubkeys: [
+                '0279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798',
+            ],
         },
     },
     {
@@ -54,6 +57,10 @@ export const validTransactions = [
                     script: 'a9147ccb85f0ab2d599bc17246c98babd5a20b1cdc7687',
                 },
             ],
+            inPubkeys: [
+                '0279be667ef9dcbbac55a06295ce870b07029bfcdb2dce28d959f2815b16f81798',
+                null,
+            ],
         },
     },
     {
@@ -247,6 +254,9 @@ export const validTransactions = [
                     script: '4effffffff01',
                 },
             ],
+            inPubkeys: [
+                '02d5ede09a8ae667d0f855ef90325e27f6ce35bbe60a1e6e87af7f5b3c652140fd',
+            ],
         },
     },
     {
@@ -368,6 +378,9 @@ export const validTransactions = [
                     script: '76a914851a33a5ef0d4279bd5854949174e2c65b1d450088ac',
                 },
             ],
+            inPubkeys: [
+                '038de63cf582d058a399a176825c045672d5ff8ea25b64d28d4375dcdb14c02b2b',
+            ],
         },
     },
     {
@@ -571,6 +584,9 @@ export const validTransactions = [
                     script: '76a914851a33a5ef0d4279bd5854949174e2c65b1d450088ac',
                 },
             ],
+            inPubkeys: [
+                '038de63cf582d058a399a176825c045672d5ff8ea25b64d28d4375dcdb14c02b2b',
+            ],
         },
     },
     {
@@ -597,6 +613,9 @@ export const validTransactions = [
                     script: '76a914851a33a5ef0d4279bd5854949174e2c65b1d450088ac',
                 },
             ],
+            inPubkeys: [
+                '038de63cf582d058a399a176825c045672d5ff8ea25b64d28d4375dcdb14c02b2b',
+            ],
         },
     },
     {
diff --git a/packages/core/test/fixtures/utility.ts b/packages/core/test/fixtures/utility.ts
index 490aa2e..8a4d453 100644
--- a/packages/core/test/fixtures/utility.ts
+++ b/packages/core/test/fixtures/utility.ts
@@ -114,3 +114,29 @@ export const createTaggedHashData = [
             'de9cd3236391a236466fbc0d3c79e62503cde0270c6df0c4a7d3d10ca94404e4',
     },
 ];
+
+export const publicKeysTestData = [
+    {
+        publickKey: '',
+        valid: false,
+    },
+    {
+        publickKey: 'random string',
+        valid: false,
+    },
+    {
+        publickKey:
+            '02d5ede09a8ae667d0f855ef90325e27f6ce35bbe60a1e6e87af7f5b3c652140fd',
+        valid: true,
+    },
+    {
+        publickKey:
+            '3045022100d269531f120f377ed2f94f42bef893ff2fe6544ac97fb477fa291bc6cfb7647e02200983f6a5bbd4ce6cf97f571995634805a7324cc5d8353ed954fa62477b0fcd0901',
+        valid: false,
+    },
+    {
+        publickKey:
+            '21038de63cf582d058a399a176825c045672d5ff8ea25b64d28d4375dcdb14c02b2bac',
+        valid: false,
+    },
+];
diff --git a/packages/core/test/transaction.spec.ts b/packages/core/test/transaction.spec.ts
index 44dc383..13561d6 100644
--- a/packages/core/test/transaction.spec.ts
+++ b/packages/core/test/transaction.spec.ts
@@ -48,4 +48,34 @@ describe('Transaction', () => {
             expect(transaction.locktime).toBe(tx.raw.locktime);
         },
     );
+
+    const complexTransactions = [
+        'P2PK',
+        'P2SH P2PK',
+        'P2SH P2PKH',
+        'P2WSH P2PK',
+        'P2WSH P2PKH',
+        'P2SH P2WSH P2PKH',
+        'P2SH P2WSH P2PK',
+        'Standard transaction (14:2)',
+        'Multisig',
+        'P2WSH Multisig',
+        'P2SH P2WSH Multisig',
+        'Coinbase transaction w/ witness',
+        'P2SH Multisig',
+        'Coinbase transaction',
+    ];
+
+    it.each(
+        validTransactions.filter(
+            (tx) => !complexTransactions.includes(tx.description),
+        ),
+    )('gets the Public Key from Inputs of a $description', (tx) => {
+        const transaction = Transaction.fromHex(tx.hex);
+        const receivedInPubkeys = tx.raw.ins.map((_, index) => {
+            const PK = transaction.getPublicKeyFromInput(index);
+            return PK ? PK?.toString('hex') : PK;
+        });
+        expect(receivedInPubkeys).toStrictEqual(tx.raw.inPubkeys);
+    });
 });
diff --git a/packages/core/test/utility.spec.ts b/packages/core/test/utility.spec.ts
index 460ac12..a0a887f 100644
--- a/packages/core/test/utility.spec.ts
+++ b/packages/core/test/utility.spec.ts
@@ -3,11 +3,13 @@ import {
     createTaggedHash,
     createInputHash,
     PrivateKey,
+    isPubKey,
 } from '../src';
 import {
     createTaggedHashData,
     createInputHashData,
     inputPrivateKeys,
+    publicKeysTestData,
 } from './fixtures/utility';
 
 describe('Utility', () => {
@@ -38,4 +40,13 @@ describe('Utility', () => {
             expect(inputHash.toString('hex')).toBe(expected);
         },
     );
+
+    it.each(publicKeysTestData)(
+        'should test for public key validity',
+        ({ publickKey, valid }) => {
+            expect(isPubKey(Buffer.from(publickKey, 'hex'))).toStrictEqual(
+                valid,
+            );
+        },
+    );
 });