adds rpc calls for setprivatesendrounds and setprivatesendamount (#2230)

* adds rpc calls for `setprivatesendrounds` and `setprivatesendamount`

* tabs -> spaces

* @gladcow change request

* Whops tab -> spaces

* @Udjin changes, not the CAmount -> int

* int stuff

* Throw error when rounds / amount isn't within range

src/rpc/client.cpp

@@ -139,6 +139,8 @@ static const CRPCConvertParam vRPCConvertParams[] =
     { "setban", 3, "absolute" },
     { "setbip69enabled", 0, "enabled" },
     { "setnetworkactive", 0, "state" },
+    { "setprivatesendrounds", 0, "rounds" },
+    { "setprivatesendamount", 0, "amount" },
     { "getmempoolancestors", 1, "verbose" },
     { "getmempooldescendants", 1, "verbose" },
     { "spork", 1, "value" },

src/wallet/rpcwallet.cpp

@@ -21,6 +21,7 @@
 #include "wallet.h"
 #include "walletdb.h"
 #include "keepass.h"
+#include "privatesend-client.h"
 
 #include <stdint.h>
 
@@ -2364,6 +2365,60 @@ UniValue settxfee(const JSONRPCRequest& request)
     return true;
 }
 
+UniValue setprivatesendrounds(const JSONRPCRequest& request)
+{
+    if (!EnsureWalletIsAvailable(request.fHelp))
+        return NullUniValue;
+
+    if (request.fHelp || request.params.size() != 1)
+        throw std::runtime_error(
+            "setprivatesendrounds rounds\n"
+            "\nSet the number of rounds for PrivateSend mixing.\n"
+            "\nArguments:\n"
+            "1. rounds         (numeric, required) The default number of rounds is " + std::to_string(DEFAULT_PRIVATESEND_ROUNDS) + 
+            " Cannot be more than " + std::to_string(MAX_PRIVATESEND_ROUNDS) + " nor less than " + std::to_string(MIN_PRIVATESEND_ROUNDS) +
+            "\nExamples:\n"
+            + HelpExampleCli("setprivatesendrounds", "4")
+            + HelpExampleRpc("setprivatesendrounds", "16")
+        );
+
+    int nRounds = request.params[0].get_int();
+
+    if (nRounds > MAX_PRIVATESEND_ROUNDS || nRounds < MIN_PRIVATESEND_ROUNDS)
+        throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid number of rounds");
+
+    privateSendClient.nPrivateSendRounds = nRounds;
+
+    return NullUniValue;
+}
+
+UniValue setprivatesendamount(const JSONRPCRequest& request)
+{
+    if (!EnsureWalletIsAvailable(request.fHelp))
+        return NullUniValue;
+
+    if (request.fHelp || request.params.size() != 1)
+        throw std::runtime_error(
+            "setprivatesendamount amount\n"
+            "\nSet the goal amount in " + CURRENCY_UNIT + " for PrivateSend mixing.\n"
+            "\nArguments:\n"
+            "1. amount         (numeric, required) The default amount is " + std::to_string(DEFAULT_PRIVATESEND_AMOUNT) +
+            " Cannot be more than " + std::to_string(MAX_PRIVATESEND_AMOUNT) + " nor less than " + std::to_string(MIN_PRIVATESEND_AMOUNT) +
+            "\nExamples:\n"
+            + HelpExampleCli("setprivatesendamount", "500")
+            + HelpExampleRpc("setprivatesendamount", "208")
+        );
+
+    int nAmount = request.params[0].get_int();
+
+    if (nAmount > MAX_PRIVATESEND_AMOUNT || nAmount < MIN_PRIVATESEND_AMOUNT)
+        throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid amount of " + CURRENCY_UNIT + " as mixing goal amount");
+
+    privateSendClient.nPrivateSendAmount = nAmount;
+
+    return NullUniValue;
+}
+
 UniValue getwalletinfo(const JSONRPCRequest& request)
 {
     if (!EnsureWalletIsAvailable(request.fHelp))
@@ -2887,6 +2942,8 @@ static const CRPCCommand commands[] =
     { "wallet",             "sendtoaddress",            &sendtoaddress,            false,  {"address","amount","comment","comment_to","subtractfeefromamount"} },
     { "wallet",             "setaccount",               &setaccount,               true,   {"address","account"} },
     { "wallet",             "settxfee",                 &settxfee,                 true,   {"amount"} },
+    { "wallet",             "setprivatesendrounds",     &setprivatesendrounds,     true,   {"rounds"} },
+    { "wallet",             "setprivatesendamount",     &setprivatesendamount,     true,   {"amount"} },
     { "wallet",             "signmessage",              &signmessage,              true,   {"address","message"} },
     { "wallet",             "walletlock",               &walletlock,               true,   {} },
     { "wallet",             "walletpassphrasechange",   &walletpassphrasechange,   true,   {"oldpassphrase","newpassphrase"} },