diff --git a/src/rpc/blockchain.cpp b/src/rpc/blockchain.cpp
index 24e0405a8..cc06cee6f 100644
--- a/src/rpc/blockchain.cpp
+++ b/src/rpc/blockchain.cpp
@@ -1489,11 +1489,11 @@ UniValue getchaintxstats(const JSONRPCRequest& request)
     const CBlockIndex* pindex;
     int blockcount = 30 * 24 * 60 * 60 / Params().GetConsensus().nPowTargetSpacing; // By default: 1 month
 
-    if (request.params.size() > 0 && !request.params[0].isNull()) {
+    if (!request.params[0].isNull()) {
         blockcount = request.params[0].get_int();
     }
 
-    bool havehash = request.params.size() > 1 && !request.params[1].isNull();
+    bool havehash = !request.params[1].isNull();
     uint256 hash;
     if (havehash) {
         hash = uint256S(request.params[1].get_str());
diff --git a/src/rpc/mining.cpp b/src/rpc/mining.cpp
index f498b5c8e..a6950899f 100644
--- a/src/rpc/mining.cpp
+++ b/src/rpc/mining.cpp
@@ -842,7 +842,7 @@ UniValue estimatesmartfee(const JSONRPCRequest& request)
     RPCTypeCheckArgument(request.params[0], UniValue::VNUM);
     unsigned int conf_target = ParseConfirmTarget(request.params[0]);
     bool conservative = true;
-    if (request.params.size() > 1 && !request.params[1].isNull()) {
+    if (!request.params[1].isNull()) {
         FeeEstimateMode fee_mode;
         if (!FeeModeFromString(request.params[1].get_str(), fee_mode)) {
             throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid estimate_mode parameter");
diff --git a/src/rpc/misc.cpp b/src/rpc/misc.cpp
index efff4a99a..6917f4b34 100644
--- a/src/rpc/misc.cpp
+++ b/src/rpc/misc.cpp
@@ -552,7 +552,7 @@ UniValue getmemoryinfo(const JSONRPCRequest& request)
             + HelpExampleRpc("getmemoryinfo", "")
         );
 
-    std::string mode = (request.params.size() < 1 || request.params[0].isNull()) ? "stats" : request.params[0].get_str();
+    std::string mode = request.params[0].isNull() ? "stats" : request.params[0].get_str();
     if (mode == "stats") {
         UniValue obj(UniValue::VOBJ);
         obj.push_back(Pair("locked", RPCLockedMemoryInfo()));
@@ -603,11 +603,11 @@ UniValue logging(const JSONRPCRequest& request)
     }
 
     uint32_t originalLogCategories = logCategories;
-    if (request.params.size() > 0 && request.params[0].isArray()) {
+    if (request.params[0].isArray()) {
         logCategories |= getCategoryMask(request.params[0]);
     }
 
-    if (request.params.size() > 1 && request.params[1].isArray()) {
+    if (request.params[1].isArray()) {
         logCategories &= ~getCategoryMask(request.params[1]);
     }
 
diff --git a/src/rpc/net.cpp b/src/rpc/net.cpp
index e463a4eda..e6b210a19 100644
--- a/src/rpc/net.cpp
+++ b/src/rpc/net.cpp
@@ -258,7 +258,7 @@ UniValue disconnectnode(const JSONRPCRequest& request)
 
     bool success;
     const UniValue &address_arg = request.params[0];
-    const UniValue &id_arg = request.params.size() < 2 ? NullUniValue : request.params[1];
+    const UniValue &id_arg = request.params[1];
 
     if (!address_arg.isNull() && id_arg.isNull()) {
         /* handle disconnect-by-address */
@@ -311,7 +311,7 @@ UniValue getaddednodeinfo(const JSONRPCRequest& request)
 
     std::vector<AddedNodeInfo> vInfo = g_connman->GetAddedNodeInfo();
 
-    if (request.params.size() == 1 && !request.params[0].isNull()) {
+    if (!request.params[0].isNull()) {
         bool found = false;
         for (const AddedNodeInfo& info : vInfo) {
             if (info.strAddedNode == request.params[0].get_str()) {
@@ -534,11 +534,11 @@ UniValue setban(const JSONRPCRequest& request)
             throw JSONRPCError(RPC_CLIENT_NODE_ALREADY_ADDED, "Error: IP/Subnet already banned");
 
         int64_t banTime = 0; //use standard bantime if not specified
-        if (request.params.size() >= 3 && !request.params[2].isNull())
+        if (!request.params[2].isNull())
             banTime = request.params[2].get_int64();
 
         bool absolute = false;
-        if (request.params.size() == 4 && request.params[3].isTrue())
+        if (request.params[3].isTrue())
             absolute = true;
 
         isSubnet ? g_connman->Ban(subNet, BanReasonManuallyAdded, banTime, absolute) : g_connman->Ban(netAddr, BanReasonManuallyAdded, banTime, absolute);
diff --git a/src/rpc/rawtransaction.cpp b/src/rpc/rawtransaction.cpp
index 810051185..9d9fef664 100644
--- a/src/rpc/rawtransaction.cpp
+++ b/src/rpc/rawtransaction.cpp
@@ -339,14 +339,14 @@ UniValue createrawtransaction(const JSONRPCRequest& request)
 
     CMutableTransaction rawTx;
 
-    if (request.params.size() > 2 && !request.params[2].isNull()) {
+    if (!request.params[2].isNull()) {
         int64_t nLockTime = request.params[2].get_int64();
         if (nLockTime < 0 || nLockTime > std::numeric_limits<uint32_t>::max())
             throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid parameter, locktime out of range");
         rawTx.nLockTime = nLockTime;
     }
 
-    bool rbfOptIn = request.params.size() > 3 ? request.params[3].isTrue() : false;
+    bool rbfOptIn = request.params[3].isTrue();
 
     for (unsigned int idx = 0; idx < inputs.size(); idx++) {
         const UniValue& input = inputs[idx];
@@ -735,7 +735,7 @@ UniValue signrawtransaction(const JSONRPCRequest& request)
 
     bool fGivenKeys = false;
     CBasicKeyStore tempKeystore;
-    if (request.params.size() > 2 && !request.params[2].isNull()) {
+    if (!request.params[2].isNull()) {
         fGivenKeys = true;
         UniValue keys = request.params[2].get_array();
         for (unsigned int idx = 0; idx < keys.size(); idx++) {
@@ -757,7 +757,7 @@ UniValue signrawtransaction(const JSONRPCRequest& request)
 #endif
 
     // Add previous txouts given in the RPC call:
-    if (request.params.size() > 1 && !request.params[1].isNull()) {
+    if (!request.params[1].isNull()) {
         UniValue prevTxs = request.params[1].get_array();
         for (unsigned int idx = 0; idx < prevTxs.size(); idx++) {
             const UniValue& p = prevTxs[idx];
@@ -828,7 +828,7 @@ UniValue signrawtransaction(const JSONRPCRequest& request)
 #endif
 
     int nHashType = SIGHASH_ALL;
-    if (request.params.size() > 3 && !request.params[3].isNull()) {
+    if (!request.params[3].isNull()) {
         static std::map<std::string, int> mapSigHashValues = {
             {std::string("ALL"), int(SIGHASH_ALL)},
             {std::string("ALL|ANYONECANPAY"), int(SIGHASH_ALL|SIGHASH_ANYONECANPAY)},
diff --git a/src/wallet/rpcwallet.cpp b/src/wallet/rpcwallet.cpp
index a6176c348..00cb99ada 100644
--- a/src/wallet/rpcwallet.cpp
+++ b/src/wallet/rpcwallet.cpp
@@ -462,26 +462,26 @@ UniValue sendtoaddress(const JSONRPCRequest& request)
 
     // Wallet comments
     CWalletTx wtx;
-    if (request.params.size() > 2 && !request.params[2].isNull() && !request.params[2].get_str().empty())
+    if (!request.params[2].isNull() && !request.params[2].get_str().empty())
         wtx.mapValue["comment"] = request.params[2].get_str();
-    if (request.params.size() > 3 && !request.params[3].isNull() && !request.params[3].get_str().empty())
+    if (!request.params[3].isNull() && !request.params[3].get_str().empty())
         wtx.mapValue["to"]      = request.params[3].get_str();
 
     bool fSubtractFeeFromAmount = false;
-    if (request.params.size() > 4 && !request.params[4].isNull()) {
+    if (!request.params[4].isNull()) {
         fSubtractFeeFromAmount = request.params[4].get_bool();
     }
 
     CCoinControl coin_control;
-    if (request.params.size() > 5 && !request.params[5].isNull()) {
+    if (!request.params[5].isNull()) {
         coin_control.signalRbf = request.params[5].get_bool();
     }
 
-    if (request.params.size() > 6 && !request.params[6].isNull()) {
+    if (!request.params[6].isNull()) {
         coin_control.m_confirm_target = ParseConfirmTarget(request.params[6]);
     }
 
-    if (request.params.size() > 7 && !request.params[7].isNull()) {
+    if (!request.params[7].isNull()) {
         if (!FeeModeFromString(request.params[7].get_str(), coin_control.m_fee_mode)) {
             throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid estimate_mode parameter");
         }
@@ -904,9 +904,9 @@ UniValue sendfrom(const JSONRPCRequest& request)
 
     CWalletTx wtx;
     wtx.strFromAccount = strAccount;
-    if (request.params.size() > 4 && !request.params[4].isNull() && !request.params[4].get_str().empty())
+    if (!request.params[4].isNull() && !request.params[4].get_str().empty())
         wtx.mapValue["comment"] = request.params[4].get_str();
-    if (request.params.size() > 5 && !request.params[5].isNull() && !request.params[5].get_str().empty())
+    if (!request.params[5].isNull() && !request.params[5].get_str().empty())
         wtx.mapValue["to"]      = request.params[5].get_str();
 
     EnsureWalletIsUnlocked(pwallet);
@@ -986,23 +986,23 @@ UniValue sendmany(const JSONRPCRequest& request)
 
     CWalletTx wtx;
     wtx.strFromAccount = strAccount;
-    if (request.params.size() > 3 && !request.params[3].isNull() && !request.params[3].get_str().empty())
+    if (!request.params[3].isNull() && !request.params[3].get_str().empty())
         wtx.mapValue["comment"] = request.params[3].get_str();
 
     UniValue subtractFeeFromAmount(UniValue::VARR);
-    if (request.params.size() > 4 && !request.params[4].isNull())
+    if (!request.params[4].isNull())
         subtractFeeFromAmount = request.params[4].get_array();
 
     CCoinControl coin_control;
-    if (request.params.size() > 5 && !request.params[5].isNull()) {
+    if (!request.params[5].isNull()) {
         coin_control.signalRbf = request.params[5].get_bool();
     }
 
-    if (request.params.size() > 6 && !request.params[6].isNull()) {
+    if (!request.params[6].isNull()) {
         coin_control.m_confirm_target = ParseConfirmTarget(request.params[6]);
     }
 
-    if (request.params.size() > 7 && !request.params[7].isNull()) {
+    if (!request.params[7].isNull()) {
         if (!FeeModeFromString(request.params[7].get_str(), coin_control.m_fee_mode)) {
             throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid estimate_mode parameter");
         }
@@ -2670,19 +2670,19 @@ UniValue listunspent(const JSONRPCRequest& request)
         );
 
     int nMinDepth = 1;
-    if (request.params.size() > 0 && !request.params[0].isNull()) {
+    if (!request.params[0].isNull()) {
         RPCTypeCheckArgument(request.params[0], UniValue::VNUM);
         nMinDepth = request.params[0].get_int();
     }
 
     int nMaxDepth = 9999999;
-    if (request.params.size() > 1 && !request.params[1].isNull()) {
+    if (!request.params[1].isNull()) {
         RPCTypeCheckArgument(request.params[1], UniValue::VNUM);
         nMaxDepth = request.params[1].get_int();
     }
 
     std::set<CBitcoinAddress> setAddress;
-    if (request.params.size() > 2 && !request.params[2].isNull()) {
+    if (!request.params[2].isNull()) {
         RPCTypeCheckArgument(request.params[2], UniValue::VARR);
         UniValue inputs = request.params[2].get_array();
         for (unsigned int idx = 0; idx < inputs.size(); idx++) {
@@ -2697,7 +2697,7 @@ UniValue listunspent(const JSONRPCRequest& request)
     }
 
     bool include_unsafe = true;
-    if (request.params.size() > 3 && !request.params[3].isNull()) {
+    if (!request.params[3].isNull()) {
         RPCTypeCheckArgument(request.params[3], UniValue::VBOOL);
         include_unsafe = request.params[3].get_bool();
     }
@@ -3112,7 +3112,7 @@ UniValue generate(const JSONRPCRequest& request)
 
     int num_generate = request.params[0].get_int();
     uint64_t max_tries = 1000000;
-    if (request.params.size() > 1 && !request.params[1].isNull()) {
+    if (!request.params[1].isNull()) {
         max_tries = request.params[1].get_int();
     }