diff --git a/src/main/java/com/sparrowwallet/drongo/protocol/Transaction.java b/src/main/java/com/sparrowwallet/drongo/protocol/Transaction.java
index 62d8a62..4d8ce5e 100644
--- a/src/main/java/com/sparrowwallet/drongo/protocol/Transaction.java
+++ b/src/main/java/com/sparrowwallet/drongo/protocol/Transaction.java
@@ -605,23 +605,4 @@ public class Transaction extends ChildMessage {
 
         return Sha256Hash.twiceOf(bos.toByteArray());
     }
-
-    public static final void main(String[] args) throws NonStandardScriptException {
-        String hex = "0100000002fe3dc9208094f3ffd12645477b3dc56f60ec4fa8e6f5d67c565d1c6b9216b36e0000000000ffffffff0815cf020f013ed6cf91d29f4202e8a58726b1ac6c79da47c23d1bee0a6925f80000000000ffffffff0100f2052a010000001976a914a30741f8145e5acadf23f751864167f32e0963f788ac00000000";
-        byte[] transactionBytes = Utils.hexToBytes(hex);
-        Transaction transaction = new Transaction(transactionBytes);
-
-        ECKey pubKey = ECKey.fromPublicOnly(Utils.hexToBytes("026dccc749adc2a9d0d89497ac511f760f45c47dc5ed9cf352a58ac706453880ae"));
-        System.out.println(ScriptType.P2PKH.getOutputScript(pubKey.getPubKeyHash()).getProgram().length);
-        Script script = new Script(Utils.hexToBytes("21026dccc749adc2a9d0d89497ac511f760f45c47dc5ed9cf352a58ac706453880aeadab210255a9626aebf5e29c0e6538428ba0d1dcf6ca98ffdf086aa8ced5e0d0215ea465ac"));
-        Sha256Hash hash = transaction.hashForWitnessSignature(1, script,4900000000L, SigHash.SINGLE);
-        System.out.println("Sighash: " + hash.toString());
-        TransactionSignature signature = TransactionSignature.decodeFromBitcoin(Utils.hexToBytes("3044022027dc95ad6b740fe5129e7e62a75dd00f291a2aeb1200b84b09d9e3789406b6c002201a9ecd315dd6a0e632ab20bbb98948bc0c6fb204f2c286963bb48517a7058e2703"), true, true);
-        if(pubKey.verify(hash, signature)) {
-            System.out.println("Verified!");
-        }
-
-        Address[] addresses = transaction.getOutputs().get(0).getScript().getToAddresses();
-        System.out.println(addresses[0]);
-    }
 }
diff --git a/src/main/java/com/sparrowwallet/drongo/wallet/BnBUtxoSelector.java b/src/main/java/com/sparrowwallet/drongo/wallet/BnBUtxoSelector.java
index c32ff8d..5132993 100644
--- a/src/main/java/com/sparrowwallet/drongo/wallet/BnBUtxoSelector.java
+++ b/src/main/java/com/sparrowwallet/drongo/wallet/BnBUtxoSelector.java
@@ -1,10 +1,14 @@
 package com.sparrowwallet.drongo.wallet;
 
 import com.sparrowwallet.drongo.protocol.Transaction;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import java.util.*;
 
 public class BnBUtxoSelector implements UtxoSelector {
+    private static final Logger log = LoggerFactory.getLogger(BnBUtxoSelector.class);
+
     private static final int TOTAL_TRIES = 100000;
 
     private final long noInputsFee;
@@ -23,7 +27,7 @@ public class BnBUtxoSelector implements UtxoSelector {
 
         ArrayDeque<Boolean> currentSelection = new ArrayDeque<>(utxoPool.size());
         long actualTargetValue = targetValue + noInputsFee;
-        System.out.println("Selected must be: " + actualTargetValue + " < x < " + (actualTargetValue + costOfChangeValue));
+        log.debug("Selected must be: " + actualTargetValue + " < x < " + (actualTargetValue + costOfChangeValue));
 
         long currentAvailableValue = utxoPool.stream().mapToLong(OutputGroup::getEffectiveValue).sum();
         if(currentAvailableValue < targetValue) {
@@ -100,7 +104,7 @@ public class BnBUtxoSelector implements UtxoSelector {
 
         // Check for solution
         if(bestSelection == null || bestSelection.isEmpty()) {
-            System.out.println("No result found");
+            log.debug("No result found");
             return Collections.emptyList();
         }
 
@@ -137,6 +141,6 @@ public class BnBUtxoSelector implements UtxoSelector {
             }
         }
         long noChangeFeeRequiredAmt = noInputsFee + inputsFee;
-        System.out.println(joiner.toString() + " = " + currentValue + " (plus fee of " + noChangeFeeRequiredAmt + ")");
+        log.debug(joiner.toString() + " = " + currentValue + " (plus fee of " + noChangeFeeRequiredAmt + ")");
     }
 }
diff --git a/src/test/java/com/sparrowwallet/drongo/psbt/PSBTTest.java b/src/test/java/com/sparrowwallet/drongo/psbt/PSBTTest.java
index d00d220..8ecc3a0 100644
--- a/src/test/java/com/sparrowwallet/drongo/psbt/PSBTTest.java
+++ b/src/test/java/com/sparrowwallet/drongo/psbt/PSBTTest.java
@@ -343,9 +343,6 @@ public class PSBTTest {
 
         Assert.assertEquals("70736274ff01009a020000000258e87a21b56daf0c23be8e7070456c336f7cbaa5c8757924f545887bb2abdd750000000000ffffffff838d0427d0ec650a68aa46bb0b098aea4422c071b2ca78352a077959d07cea1d0100000000ffffffff0270aaf00800000000160014d85c2b71d0060b09c9886aeb815e50991dda124d00e1f5050000000016001400aea9a2e5f0f876a588df5546e8742d1d87008f00000000000100bb0200000001aad73931018bd25f84ae400b68848be09db706eac2ac18298babee71ab656f8b0000000048473044022058f6fc7c6a33e1b31548d481c826c015bd30135aad42cd67790dab66d2ad243b02204a1ced2604c6735b6393e5b41691dd78b00f0c5942fb9f751856faa938157dba01feffffff0280f0fa020000000017a9140fb9463421696b82c833af241c78c17ddbde493487d0f20a270100000017a91429ca74f8a08f81999428185c97b5d852e4063f6187650000000104475221029583bf39ae0a609747ad199addd634fa6108559d6c5cd39b4c2183f1ab96e07f2102dab61ff49a14db6a7d02b0cd1fbb78fc4b18312b5b4e54dae4dba2fbfef536d752ae2206029583bf39ae0a609747ad199addd634fa6108559d6c5cd39b4c2183f1ab96e07f10d90c6a4f000000800000008000000080220602dab61ff49a14db6a7d02b0cd1fbb78fc4b18312b5b4e54dae4dba2fbfef536d710d90c6a4f0000008000000080010000800001012000c2eb0b0000000017a914b7f5faf40e3d40a5a459b1db3535f2b72fa921e88701042200208c2353173743b595dfb4a07b72ba8e42e3797da74e87fe7d9d7497e3b2028903010547522103089dc10c7ac6db54f91329af617333db388cead0c231f723379d1b99030b02dc21023add904f3d6dcf59ddb906b0dee23529b7ffb9ed50e5e86151926860221f0e7352ae2206023add904f3d6dcf59ddb906b0dee23529b7ffb9ed50e5e86151926860221f0e7310d90c6a4f000000800000008003000080220603089dc10c7ac6db54f91329af617333db388cead0c231f723379d1b99030b02dc10d90c6a4f00000080000000800200008000220203a9a4c37f5996d3aa25dbac6b570af0650394492942460b354753ed9eeca5877110d90c6a4f000000800000008004000080002202027f6399757d2eff55a136ad02c684b1838b6556e5f1b6b34282a94b6b5005109610d90c6a4f00000080000000800500008000", psbt.toString());
 
-        PSBT testPSBT = new PSBT(Utils.hexToBytes("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"));
-        System.out.println(testPSBT.getExtendedPublicKeys());
-
         for(PSBTInput psbtInput : psbt.getPsbtInputs()) {
             psbtInput.setSigHash(SigHash.ALL);
         }