added skip for dust for transactions sent to burn address

Author: a-ok123

.gitignore

@@ -5,6 +5,7 @@ venv/
 venv27/
 
 compile_commands.json
+pastel-config.h.in
 
 *.tar.gz
 *.deb

src/accept_to_mempool.cpp

@@ -79,6 +79,7 @@ bool IsStandardTx(const CTransaction& tx, string& reason, const CChainParams& ch
         }
     }
 
+    const auto& destBurnAddress = chainparams.getPastelBurnAddressHash();
     for (const auto& txin : tx.vin)
     {
         // Biggest 'standard' txin is a 15-of-15 P2SH multisig with compressed
@@ -115,7 +116,16 @@ bool IsStandardTx(const CTransaction& tx, string& reason, const CChainParams& ch
         else if ((whichType == TX_MULTISIG) && (!fIsBareMultisigStd)) {
             reason = "bare-multisig";
             return false;
-        } else if (txout.IsDust(gl_ChainOptions.minRelayTxFee)) {
+        }
+
+        // skip dust check if transaction is to the burn transaction
+        bool bSkipDustCheck = false;
+        if ((whichType == TX_PUBKEYHASH) || (whichType == TX_SCRIPTHASH))
+        {
+            const uint160 addressHash = txout.scriptPubKey.AddressHash();
+            bSkipDustCheck = (addressHash == destBurnAddress);
+        }
+        if (!bSkipDustCheck && txout.IsDust(gl_ChainOptions.minRelayTxFee)) {
             reason = "dust";
             return false;
         }

src/config/pastel-config.h.in

@@ -454,12 +454,14 @@ class CTxOut
             return 0;
 
         const size_t nSize = GetSerializeSize(*this, SER_DISK, 0) + 148u;
+
         return 3*minRelayTxFee.GetFee(nSize);
     }
 
     bool IsDust(const CFeeRate &minRelayTxFee) const
     {
-        return (nValue < GetDustThreshold(minRelayTxFee));
+        auto dustThreshold =  GetDustThreshold(minRelayTxFee);
+        return (nValue < dustThreshold);
     }
 
     friend bool operator==(const CTxOut& a, const CTxOut& b)