Add helptexts for -whitelist and rpc prioritisetransaction and switch to bitcoin instead of satoshis

src/init.cpp

@@ -259,6 +259,7 @@ std::string HelpMessage(HelpMessageMode mode)
 #endif
     strUsage += "  -whitebind=<addr>      " + _("Bind to given address and whitelist peers connecting to it. Use [host]:port notation for IPv6") + "\n";
     strUsage += "  -whitelist=<netmask>   " + _("Whitelist peers connecting from the given netmask or ip. Can be specified multiple times.") + "\n";
+    strUsage += "                         " + _("Whitelisted peers cannot be DoS banned and their transactions are always relayed, even if they are already in the mempool, useful e.g. for a gateway") + "\n";
 
 #ifdef ENABLE_WALLET
     strUsage += "\n" + _("Wallet options:") + "\n";

src/rpcclient.cpp

@@ -85,6 +85,8 @@ static const CRPCConvertParam vRPCConvertParams[] =
     { "getrawmempool", 0 },
     { "estimatefee", 0 },
     { "estimatepriority", 0 },
+    { "prioritisetransaction", 1 },
+    { "prioritisetransaction", 2 },
 };
 
 class CRPCConvertTable

src/rpcmining.cpp

@@ -252,11 +252,30 @@ Value prioritisetransaction(const Array& params, bool fHelp)
     if (fHelp || params.size() != 3)
         throw runtime_error(
             "prioritisetransaction <txid> <priority delta> <fee delta>\n"
-            "Accepts the transaction into mined blocks at a higher (or lower) priority");
+            "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"
+            "                  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 absolute fee value to add or subtract in bitcoin.\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 0.00010000")
+            + HelpExampleRpc("prioritisetransaction", "\"txid\", 0.0, 0.00010000")
+        );
 
     uint256 hash;
     hash.SetHex(params[0].get_str());
-    mempool.PrioritiseTransaction(hash, params[0].get_str(), params[1].get_real(), params[2].get_int64());
+
+    int64_t nAmount = 0;
+    if (params[2].get_real() != 0.0)
+        nAmount = AmountFromValue(params[2]);
+
+    mempool.PrioritiseTransaction(hash, params[0].get_str(), params[1].get_real(), nAmount);
     return true;
 }