From 37ca98c2b0328438c6ca4f1b35dd356f58679502 Mon Sep 17 00:00:00 2001
From: Craig Raw <craigraw@gmail.com>
Date: Sun, 24 May 2026 11:23:33 +0200
Subject: [PATCH] implement dust detection for sp wallets on received utxos at
 a higher default limit

---
 drongo                                        |  2 +-
 .../com/sparrowwallet/sparrow/io/Config.java  |  7 +++++-
 .../sparrow/wallet/WalletUtxosEntry.java      | 24 +++++++++++++------
 3 files changed, 24 insertions(+), 9 deletions(-)

diff --git a/drongo b/drongo
index 20670b9b..e96aa0d3 160000
--- a/drongo
+++ b/drongo
@@ -1 +1 @@
-Subproject commit 20670b9b7db749472b02d7f6f129294c53832390
+Subproject commit e96aa0d3f836b2d035cf5449da010147e56c6354
diff --git a/src/main/java/com/sparrowwallet/sparrow/io/Config.java b/src/main/java/com/sparrowwallet/sparrow/io/Config.java
index 0055831e..1dbb24c9 100644
--- a/src/main/java/com/sparrowwallet/sparrow/io/Config.java
+++ b/src/main/java/com/sparrowwallet/sparrow/io/Config.java
@@ -18,12 +18,12 @@ import org.slf4j.LoggerFactory;
 import java.io.*;
 import java.lang.reflect.Type;
 import java.util.*;
-import java.util.stream.Collectors;
 
 import static com.sparrowwallet.sparrow.AppServices.ENUMERATE_HW_PERIOD_SECS;
 import static com.sparrowwallet.sparrow.net.PagedBatchRequestBuilder.DEFAULT_PAGE_SIZE;
 import static com.sparrowwallet.sparrow.net.TcpTransport.DEFAULT_MAX_TIMEOUT;
 import static com.sparrowwallet.sparrow.wallet.WalletUtxosEntry.DUST_ATTACK_THRESHOLD_SATS;
+import static com.sparrowwallet.sparrow.wallet.WalletUtxosEntry.DUST_ATTACK_THRESHOLD_SP_SATS;
 
 public class Config {
     private static final Logger log = LoggerFactory.getLogger(Config.class);
@@ -64,6 +64,7 @@ public class Config {
     private List<File> recentWalletFiles;
     private Integer keyDerivationPeriod;
     private long dustAttackThreshold = DUST_ATTACK_THRESHOLD_SATS;
+    private long dustAttackThresholdSp = DUST_ATTACK_THRESHOLD_SP_SATS;
     private int enumerateHwPeriod = ENUMERATE_HW_PERIOD_SECS;
     private QRDensity qrDensity;
     private QREncoding qrEncoding;
@@ -448,6 +449,10 @@ public class Config {
         return dustAttackThreshold;
     }
 
+    public long getDustAttackThresholdSp() {
+        return dustAttackThresholdSp;
+    }
+
     public int getEnumerateHwPeriod() {
         return enumerateHwPeriod;
     }
diff --git a/src/main/java/com/sparrowwallet/sparrow/wallet/WalletUtxosEntry.java b/src/main/java/com/sparrowwallet/sparrow/wallet/WalletUtxosEntry.java
index 10d11664..9ca2610b 100644
--- a/src/main/java/com/sparrowwallet/sparrow/wallet/WalletUtxosEntry.java
+++ b/src/main/java/com/sparrowwallet/sparrow/wallet/WalletUtxosEntry.java
@@ -1,5 +1,6 @@
 package com.sparrowwallet.sparrow.wallet;
 
+import com.sparrowwallet.drongo.policy.PolicyType;
 import com.sparrowwallet.drongo.wallet.Wallet;
 import com.sparrowwallet.drongo.wallet.WalletNode;
 import com.sparrowwallet.sparrow.io.Config;
@@ -9,6 +10,7 @@ import java.util.stream.Collectors;
 
 public class WalletUtxosEntry extends Entry {
     public static final int DUST_ATTACK_THRESHOLD_SATS = 1000;
+    public static final int DUST_ATTACK_THRESHOLD_SP_SATS = 5000;
 
     public WalletUtxosEntry(Wallet wallet) {
         super(wallet, wallet.getName(), wallet.getWalletUtxos().entrySet().stream().map(entry -> new UtxoEntry(entry.getValue().getWallet(), entry.getKey(), HashIndexEntry.Type.OUTPUT, entry.getValue())).collect(Collectors.toList()));
@@ -50,14 +52,22 @@ public class WalletUtxosEntry extends Entry {
     }
 
     protected void calculateDust() {
-        long dustAttackThreshold = Config.get().getDustAttackThreshold();
-        Set<WalletNode> duplicateNodes = getWallet().getWalletTxos().values().stream()
-                .collect(Collectors.groupingBy(e -> e, Collectors.counting()))
-                .entrySet().stream().filter(e -> e.getValue() > 1).map(Map.Entry::getKey).collect(Collectors.toSet());
+        if(getWallet().getPolicyType() == PolicyType.SINGLE_SP) {
+            long dustAttackThreshold = Config.get().getDustAttackThresholdSp();
+            for(Entry entry : getChildren()) {
+                UtxoEntry utxoEntry = (UtxoEntry) entry;
+                utxoEntry.setDustAttack(utxoEntry.getValue() <= dustAttackThreshold && !utxoEntry.getWallet().allInputsFromWallet(utxoEntry.getHashIndex().getHash()));
+            }
+        } else {
+            long dustAttackThreshold = Config.get().getDustAttackThreshold();
+            Set<WalletNode> duplicateNodes = getWallet().getWalletTxos().values().stream()
+                    .collect(Collectors.groupingBy(e -> e, Collectors.counting()))
+                    .entrySet().stream().filter(e -> e.getValue() > 1).map(Map.Entry::getKey).collect(Collectors.toSet());
 
-        for(Entry entry : getChildren()) {
-            UtxoEntry utxoEntry = (UtxoEntry) entry;
-            utxoEntry.setDustAttack(utxoEntry.getValue() <= dustAttackThreshold && duplicateNodes.contains(utxoEntry.getNode()) && !utxoEntry.getWallet().allInputsFromWallet(utxoEntry.getHashIndex().getHash()));
+            for(Entry entry : getChildren()) {
+                UtxoEntry utxoEntry = (UtxoEntry) entry;
+                utxoEntry.setDustAttack(utxoEntry.getValue() <= dustAttackThreshold && duplicateNodes.contains(utxoEntry.getNode()) && !utxoEntry.getWallet().allInputsFromWallet(utxoEntry.getHashIndex().getHash()));
+            }
         }
     }