src/main.cpp

@@ -82,6 +82,7 @@ bool fEnableReplacement = DEFAULT_ENABLE_REPLACEMENT;
 
 CFeeRate minRelayTxFee = CFeeRate(DEFAULT_MIN_RELAY_TX_FEE);
 CAmount maxTxFee = DEFAULT_TRANSACTION_MAXFEE;
+CAmount minFeePerNameClaimChar = MIN_FEE_PER_NAMECLAIM_CHAR;
 
 CTxMemPool mempool(::minRelayTxFee);
 FeeFilterRounder filterRounder(::minRelayTxFee);
@@ -1194,6 +1195,14 @@ bool AcceptToMemoryPoolWorker(CTxMemPool& pool, CValidationState& state, const C
             return state.DoS(0, false, REJECT_NONSTANDARD, "bad-txns-too-many-sigops", false,
                 strprintf("%d", nSigOps));
 
+        // If a ClaimTrie transaction, it must meet the minimum fee requirement due to
+        // it consuming extra system resources, compared to an ordinary transaction
+        CAmount minClaimTrieFee = CalcMinClaimTrieFee(tx, minFeePerNameClaimChar);
+        if (nModifiedFees < minClaimTrieFee) {
+            return state.DoS(0, false, REJECT_INSUFFICIENTFEE, "minimum claim trie fee not met", false,
+                             strprintf("%d < %d", nFees, minClaimTrieFee));
+        }
+
         CAmount mempoolRejectFee = pool.GetMinFee(GetArg("-maxmempool", DEFAULT_MAX_MEMPOOL_SIZE) * 1000000).GetFee(nSize);
         if (mempoolRejectFee > 0 && nModifiedFees < mempoolRejectFee) {
             return state.DoS(0, false, REJECT_INSUFFICIENTFEE, "mempool min fee not met", false, strprintf("%d < %d", nFees, mempoolRejectFee));
@@ -1201,7 +1210,6 @@ bool AcceptToMemoryPoolWorker(CTxMemPool& pool, CValidationState& state, const C
             // Require that free transactions have sufficient priority to be mined in the next block.
             return state.DoS(0, false, REJECT_INSUFFICIENTFEE, "insufficient priority");
         }
-
         // Continuously rate-limit free (really, very-low-fee) transactions
         // This mitigates 'penny-flooding' -- sending thousands of free transactions just to
         // be annoying or make others' transactions take longer to confirm.

src/main.h

@@ -50,7 +50,7 @@ static const bool DEFAULT_WHITELISTFORCERELAY = true;
 /** Default for -minrelaytxfee, minimum relay fee for transactions */
 static const unsigned int DEFAULT_MIN_RELAY_TX_FEE = 1000;
 //! -maxtxfee default
-static const CAmount DEFAULT_TRANSACTION_MAXFEE = 0.1 * COIN;
+static const CAmount DEFAULT_TRANSACTION_MAXFEE = 1 * COIN;
 //! Discourage users to set fees higher than this amount (in satoshis) per kB
 static const CAmount HIGH_TX_FEE_PER_KB = 0.01 * COIN;
 //! -maxtxfee will warn if called with a higher fee than this amount (in satoshis)
@@ -163,6 +163,9 @@ extern size_t nCoinCacheUsage;
 extern CFeeRate minRelayTxFee;
 /** Absolute maximum transaction fee (in satoshis) used by wallet and mempool (rejects high fee in sendrawtransaction) */
 extern CAmount maxTxFee;
+/** Used to calculate minimum fee for claim trie transactions **/
+extern CAmount minFeePerNameClaimChar;
+
 /** If the tip is older than this (in seconds), the node is considered to be in initial block download. */
 extern int64_t nMaxTipAge;
 extern bool fEnableReplacement;

src/test/claimtriebranching_tests.cpp

@@ -751,6 +751,4 @@ BOOST_AUTO_TEST_CASE(claimtriebranching_expire)
 
 }
 
-
-
 BOOST_AUTO_TEST_SUITE_END()

src/test/test_bitcoin.cpp

@@ -153,6 +153,7 @@ TestChain100Setup::~TestChain100Setup()
 RegTestingSetup::RegTestingSetup() : TestingSetup(CBaseChainParams::REGTEST)
 {
     minRelayTxFee = CFeeRate(0);
+    minFeePerNameClaimChar = 0;
 }
 
 RegTestingSetup::~RegTestingSetup()

src/wallet/wallet.cpp

@@ -2279,6 +2279,9 @@ bool CWallet::CreateTransaction(const vector<CRecipient>& vecSend, CWalletTx& wt
                 if (coinControl && nFeeNeeded > 0 && coinControl->nMinimumTotalFee > nFeeNeeded) {
                     nFeeNeeded = coinControl->nMinimumTotalFee;
                 }
+                // Make sure we meet the minimum claimtrie fee, pick which ever one is largest
+                CAmount minClaimTrieFee = CalcMinClaimTrieFee(wtxNew, minFeePerNameClaimChar);
+                nFeeNeeded = std::max(nFeeNeeded, minClaimTrieFee);
 
                 // If we made it here and we aren't even able to meet the relay fee on the next pass, give up
                 // because we must be at the maximum allowed fee.