[rpc] Remove priorityDelta from prioritisetransaction

This a breaking API change to the prioritisetransaction RPC call which previously required exactly three arguments and now requires exactly two (hash and feeDelta).  The function prioritiseTransaction is also updated.

qa/rpc-tests/bip68-sequence.py

@@ -256,7 +256,7 @@ class BIP68Test(BitcoinTestFramework):
 
         # Now mine some blocks, but make sure tx2 doesn't get mined.
         # Use prioritisetransaction to lower the effective feerate to 0
-        self.nodes[0].prioritisetransaction(tx2.hash, -1e15, int(-self.relayfee*COIN))
+        self.nodes[0].prioritisetransaction(tx2.hash, int(-self.relayfee*COIN))
         cur_time = int(time.time())
         for i in range(10):
             self.nodes[0].setmocktime(cur_time + 600)
@@ -269,7 +269,7 @@ class BIP68Test(BitcoinTestFramework):
         test_nonzero_locks(tx2, self.nodes[0], self.relayfee, use_height_lock=False)
 
         # Mine tx2, and then try again
-        self.nodes[0].prioritisetransaction(tx2.hash, 1e15, int(self.relayfee*COIN))
+        self.nodes[0].prioritisetransaction(tx2.hash, int(self.relayfee*COIN))
 
         # Advance the time on the node so that we can test timelocks
         self.nodes[0].setmocktime(cur_time+600)

qa/rpc-tests/mempool_packages.py

@@ -103,7 +103,7 @@ class MempoolPackagesTest(BitcoinTestFramework):
 
         # Check that descendant modified fees includes fee deltas from
         # prioritisetransaction
-        self.nodes[0].prioritisetransaction(chain[-1], 0, 1000)
+        self.nodes[0].prioritisetransaction(chain[-1], 1000)
         mempool = self.nodes[0].getrawmempool(True)
 
         descendant_fees = 0
@@ -124,7 +124,7 @@ class MempoolPackagesTest(BitcoinTestFramework):
         assert_equal(len(self.nodes[0].getrawmempool()), 0)
         # Prioritise a transaction that has been mined, then add it back to the
         # mempool by using invalidateblock.
-        self.nodes[0].prioritisetransaction(chain[-1], 0, 2000)
+        self.nodes[0].prioritisetransaction(chain[-1], 2000)
         self.nodes[0].invalidateblock(self.nodes[0].getbestblockhash())
         # Keep node1's tip synced with node0
         self.nodes[1].invalidateblock(self.nodes[1].getbestblockhash())

qa/rpc-tests/prioritise_transaction.py

@@ -51,7 +51,7 @@ class PrioritiseTransactionTest(BitcoinTestFramework):
 
         # add a fee delta to something in the cheapest bucket and make sure it gets mined
         # also check that a different entry in the cheapest bucket is NOT mined
-        self.nodes[0].prioritisetransaction(txids[0][0], 0, int(3*base_fee*COIN))
+        self.nodes[0].prioritisetransaction(txids[0][0], int(3*base_fee*COIN))
 
         self.nodes[0].generate(1)
 
@@ -70,7 +70,7 @@ class PrioritiseTransactionTest(BitcoinTestFramework):
 
         # Add a prioritisation before a tx is in the mempool (de-prioritising a
         # high-fee transaction so that it's now low fee).
-        self.nodes[0].prioritisetransaction(high_fee_tx, -1e15, -int(2*base_fee*COIN))
+        self.nodes[0].prioritisetransaction(high_fee_tx, -int(2*base_fee*COIN))
 
         # Add everything back to mempool
         self.nodes[0].invalidateblock(self.nodes[0].getbestblockhash())
@@ -118,7 +118,7 @@ class PrioritiseTransactionTest(BitcoinTestFramework):
         # This is a less than 1000-byte transaction, so just set the fee
         # to be the minimum for a 1000 byte transaction and check that it is
         # accepted.
-        self.nodes[0].prioritisetransaction(tx_id, 0, int(self.relayfee*COIN))
+        self.nodes[0].prioritisetransaction(tx_id, int(self.relayfee*COIN))
 
         print("Assert that prioritised free transaction is accepted to mempool")
         assert_equal(self.nodes[0].sendrawtransaction(tx_hex), tx_id)

qa/rpc-tests/replace-by-fee.py

@@ -543,7 +543,7 @@ class ReplaceByFeeTest(BitcoinTestFramework):
             assert(False)
 
         # Use prioritisetransaction to set tx1a's fee to 0.
-        self.nodes[0].prioritisetransaction(tx1a_txid, 0, int(-0.1*COIN))
+        self.nodes[0].prioritisetransaction(tx1a_txid, int(-0.1*COIN))
 
         # Now tx1b should be able to replace tx1a
         tx1b_txid = self.nodes[0].sendrawtransaction(tx1b_hex, True)
@@ -575,7 +575,7 @@ class ReplaceByFeeTest(BitcoinTestFramework):
             assert(False)
 
         # Now prioritise tx2b to have a higher modified fee
-        self.nodes[0].prioritisetransaction(tx2b.hash, 0, int(0.1*COIN))
+        self.nodes[0].prioritisetransaction(tx2b.hash, int(0.1*COIN))
 
         # tx2b should now be accepted
         tx2b_txid = self.nodes[0].sendrawtransaction(tx2b_hex, True)

src/rpc/client.cpp

@@ -108,8 +108,7 @@ static const CRPCConvertParam vRPCConvertParams[] =
     { "getrawmempool", 0, "verbose" },
     { "estimatefee", 0, "nblocks" },
     { "estimatesmartfee", 0, "nblocks" },
-    { "prioritisetransaction", 1, "priority_delta" },
+    { "prioritisetransaction", 1, "fee_delta" },
-    { "prioritisetransaction", 2, "fee_delta" },
     { "setban", 2, "bantime" },
     { "setban", 3, "absolute" },
     { "setnetworkactive", 0, "state" },

src/rpc/mining.cpp

@@ -258,31 +258,28 @@ UniValue getmininginfo(const JSONRPCRequest& request)
 // NOTE: Unlike wallet RPC (which use BTC values), mining RPCs follow GBT (BIP 22) in using satoshi amounts
 UniValue prioritisetransaction(const JSONRPCRequest& request)
 {
-    if (request.fHelp || request.params.size() != 3)
+    if (request.fHelp || request.params.size() != 2)
         throw runtime_error(
-            "prioritisetransaction <txid> <priority delta> <fee delta>\n"
+            "prioritisetransaction <txid> <fee delta>\n"
             "Accepts the transaction into mined blocks at a higher (or lower) priority\n"
             "\nArguments:\n"
             "1. \"txid\"       (string, required) The transaction id.\n"
-            "2. priority_delta (numeric, required) The priority to add or subtract.\n"
+            "2. fee_delta      (numeric, required) The fee value (in satoshis) to add (or subtract, if negative).\n"
-            "                  The transaction selection algorithm considers the tx as it would have a higher priority.\n"
-            "                  (priority of a transaction is calculated: coinage * value_in_satoshis / txsize) \n"
-            "3. fee_delta      (numeric, required) The fee value (in satoshis) to add (or subtract, if negative).\n"
             "                  The fee is not actually paid, only the algorithm for selecting transactions into a block\n"
             "                  considers the transaction as it would have paid a higher (or lower) fee.\n"
             "\nResult:\n"
             "true              (boolean) Returns true\n"
             "\nExamples:\n"
-            + HelpExampleCli("prioritisetransaction", "\"txid\" 0.0 10000")
+            + HelpExampleCli("prioritisetransaction", "\"txid\" 10000")
-            + HelpExampleRpc("prioritisetransaction", "\"txid\", 0.0, 10000")
+            + HelpExampleRpc("prioritisetransaction", "\"txid\", 10000")
         );
 
     LOCK(cs_main);
 
     uint256 hash = ParseHashStr(request.params[0].get_str(), "txid");
-    CAmount nAmount = request.params[2].get_int64();
+    CAmount nAmount = request.params[1].get_int64();
 
-    mempool.PrioritiseTransaction(hash, request.params[1].get_real(), nAmount);
+    mempool.PrioritiseTransaction(hash, nAmount);
     return true;
 }
 
@@ -853,7 +850,7 @@ static const CRPCCommand commands[] =
   //  --------------------- ------------------------  -----------------------  ----------
     { "mining",             "getnetworkhashps",       &getnetworkhashps,       true,  {"nblocks","height"} },
     { "mining",             "getmininginfo",          &getmininginfo,          true,  {} },
-    { "mining",             "prioritisetransaction",  &prioritisetransaction,  true,  {"txid","priority_delta","fee_delta"} },
+    { "mining",             "prioritisetransaction",  &prioritisetransaction,  true,  {"txid","fee_delta"} },
     { "mining",             "getblocktemplate",       &getblocktemplate,       true,  {"template_request"} },
     { "mining",             "submitblock",            &submitblock,            true,  {"hexdata","parameters"} },
 

src/txmempool.cpp

@@ -404,11 +404,11 @@ bool CTxMemPool::addUnchecked(const uint256& hash, const CTxMemPoolEntry &entry,
     // Update transaction for any feeDelta created by PrioritiseTransaction
     // TODO: refactor so that the fee delta is calculated before inserting
     // into mapTx.
-    std::map<uint256, std::pair<double, CAmount> >::const_iterator pos = mapDeltas.find(hash);
+    std::map<uint256, CAmount>::const_iterator pos = mapDeltas.find(hash);
     if (pos != mapDeltas.end()) {
-        const std::pair<double, CAmount> &deltas = pos->second;
+        const CAmount &delta = pos->second;
-        if (deltas.second) {
+        if (delta) {
-            mapTx.modify(newit, update_fee_delta(deltas.second));
+            mapTx.modify(newit, update_fee_delta(delta));
         }
     }
 
@@ -910,16 +910,15 @@ CTxMemPool::ReadFeeEstimates(CAutoFile& filein)
     return true;
 }
 
-void CTxMemPool::PrioritiseTransaction(const uint256& hash, double dPriorityDelta, const CAmount& nFeeDelta)
+void CTxMemPool::PrioritiseTransaction(const uint256& hash, const CAmount& nFeeDelta)
 {
     {
         LOCK(cs);
-        std::pair<double, CAmount> &deltas = mapDeltas[hash];
+        CAmount &delta = mapDeltas[hash];
-        deltas.first += dPriorityDelta;
+        delta += nFeeDelta;
-        deltas.second += nFeeDelta;
         txiter it = mapTx.find(hash);
         if (it != mapTx.end()) {
-            mapTx.modify(it, update_fee_delta(deltas.second));
+            mapTx.modify(it, update_fee_delta(delta));
             // Now update all ancestors' modified fees with descendants
             setEntries setAncestors;
             uint64_t nNoLimit = std::numeric_limits<uint64_t>::max();
@@ -930,18 +929,17 @@ void CTxMemPool::PrioritiseTransaction(const uint256& hash, double dPriorityDelt
             }
         }
     }
-    LogPrintf("PrioritiseTransaction: %s priority += %f, fee += %d\n", hash.ToString(), dPriorityDelta, FormatMoney(nFeeDelta));
+    LogPrintf("PrioritiseTransaction: %s feerate += %s\n", hash.ToString(), FormatMoney(nFeeDelta));
 }
 
-void CTxMemPool::ApplyDeltas(const uint256 hash, double &dPriorityDelta, CAmount &nFeeDelta) const
+void CTxMemPool::ApplyDelta(const uint256 hash, CAmount &nFeeDelta) const
 {
     LOCK(cs);
-    std::map<uint256, std::pair<double, CAmount> >::const_iterator pos = mapDeltas.find(hash);
+    std::map<uint256, CAmount>::const_iterator pos = mapDeltas.find(hash);
     if (pos == mapDeltas.end())
         return;
-    const std::pair<double, CAmount> &deltas = pos->second;
+    const CAmount &delta = pos->second;
-    dPriorityDelta += deltas.first;
+    nFeeDelta += delta;
-    nFeeDelta += deltas.second;
 }
 
 void CTxMemPool::ClearPrioritisation(const uint256 hash)

src/txmempool.h

@@ -501,7 +501,7 @@ private:
 
 public:
     indirectmap<COutPoint, const CTransaction*> mapNextTx;
-    std::map<uint256, std::pair<double, CAmount> > mapDeltas;
+    std::map<uint256, CAmount> mapDeltas;
 
     /** Create a new CTxMemPool.
      */
@@ -543,8 +543,8 @@ public:
     bool HasNoInputsOf(const CTransaction& tx) const;
 
     /** Affect CreateNewBlock prioritisation of transactions */
-    void PrioritiseTransaction(const uint256& hash, double dPriorityDelta, const CAmount& nFeeDelta);
+    void PrioritiseTransaction(const uint256& hash, const CAmount& nFeeDelta);
-    void ApplyDeltas(const uint256 hash, double &dPriorityDelta, CAmount &nFeeDelta) const;
+    void ApplyDelta(const uint256 hash, CAmount &nFeeDelta) const;
     void ClearPrioritisation(const uint256 hash);
 
 public:

src/validation.cpp

@@ -720,8 +720,7 @@ bool AcceptToMemoryPoolWorker(CTxMemPool& pool, CValidationState& state, const C
         CAmount nFees = nValueIn-nValueOut;
         // nModifiedFees includes any fee deltas from PrioritiseTransaction
         CAmount nModifiedFees = nFees;
-        double nPriorityDummy = 0;
+        pool.ApplyDelta(hash, nModifiedFees);
-        pool.ApplyDeltas(hash, nPriorityDummy, nModifiedFees);
 
         CAmount inChainInputValue;
         double dPriority = view.GetPriority(tx, chainActive.Height(), inChainInputValue);
@@ -4184,7 +4183,6 @@ bool LoadMempool(void)
         }
         uint64_t num;
         file >> num;
-        double prioritydummy = 0;
         while (num--) {
             CTransactionRef tx;
             int64_t nTime;
@@ -4195,7 +4193,7 @@ bool LoadMempool(void)
 
             CAmount amountdelta = nFeeDelta;
             if (amountdelta) {
-                mempool.PrioritiseTransaction(tx->GetHash(), prioritydummy, amountdelta);
+                mempool.PrioritiseTransaction(tx->GetHash(), amountdelta);
             }
             CValidationState state;
             if (nTime + nExpiryTimeout > nNow) {
@@ -4216,7 +4214,7 @@ bool LoadMempool(void)
         file >> mapDeltas;
 
         for (const auto& i : mapDeltas) {
-            mempool.PrioritiseTransaction(i.first, prioritydummy, i.second);
+            mempool.PrioritiseTransaction(i.first, i.second);
         }
     } catch (const std::exception& e) {
         LogPrintf("Failed to deserialize mempool data on disk: %s. Continuing anyway.\n", e.what());
@@ -4237,7 +4235,7 @@ void DumpMempool(void)
     {
         LOCK(mempool.cs);
         for (const auto &i : mempool.mapDeltas) {
-            mapDeltas[i.first] = i.second.second;
+            mapDeltas[i.first] = i.second;
         }
         vinfo = mempool.infoAll();
     }