rpc: Pass argument descriptions to RPCHelpMan

1 files changed, 244 insertions, 464 deletions

diff --git a/src/wallet/rpcwallet.cpp b/src/wallet/rpcwallet.cpp
index d4806b4c6b..28ef0ddcdc 100644
--- a/src/wallet/rpcwallet.cpp
+++ b/src/wallet/rpcwallet.cpp
@@ -154,13 +154,10 @@ static UniValue getnewaddress(const JSONRPCRequest& request)
                 "If 'label' is specified, it is added to the address book \n"
                 "so payments received with the address will be associated with 'label'.\n",
                 {
-                    {"label", RPCArg::Type::STR, true},
-                    {"address_type", RPCArg::Type::STR, true},
+                    {"label", RPCArg::Type::STR, /* opt */ true, /* default_val */ "", "The label name for the address to be linked to. If not provided, the default label \"\" is used. It can also be set to the empty string \"\" to represent the default label. The label does not need to exist, it will be created if there is no label by the given name."},
+                    {"address_type", RPCArg::Type::STR, /* opt */ true, /* default_val */ "", "The address type to use. Options are \"legacy\", \"p2sh-segwit\", and \"bech32\". Default is set by -addresstype."},
                 }}
                 .ToString() +
-            "\nArguments:\n"
-            "1. \"label\"          (string, optional) The label name for the address to be linked to. If not provided, the default label \"\" is used. It can also be set to the empty string \"\" to represent the default label. The label does not need to exist, it will be created if there is no label by the given name.\n"
-            "2. \"address_type\"   (string, optional) The address type to use. Options are \"legacy\", \"p2sh-segwit\", and \"bech32\". Default is set by -addresstype.\n"
             "\nResult:\n"
             "\"address\"    (string) The new bitcoin address\n"
             "\nExamples:\n"
@@ -218,11 +215,9 @@ static UniValue getrawchangeaddress(const JSONRPCRequest& request)
                 "\nReturns a new Bitcoin address, for receiving change.\n"
                 "This is for use with raw transactions, NOT normal use.\n",
                 {
-                    {"address_type", RPCArg::Type::STR, true},
+                    {"address_type", RPCArg::Type::STR, /* opt */ true, /* default_val */ "", "The address type to use. Options are \"legacy\", \"p2sh-segwit\", and \"bech32\". Default is set by -changetype."},
                 }}
                 .ToString() +
-            "\nArguments:\n"
-            "1. \"address_type\"           (string, optional) The address type to use. Options are \"legacy\", \"p2sh-segwit\", and \"bech32\". Default is set by -changetype.\n"
             "\nResult:\n"
             "\"address\"    (string) The address\n"
             "\nExamples:\n"
@@ -275,13 +270,10 @@ static UniValue setlabel(const JSONRPCRequest& request)
             RPCHelpMan{"setlabel",
                 "\nSets the label associated with the given address.\n",
                 {
-                    {"address", RPCArg::Type::STR, false},
-                    {"label", RPCArg::Type::STR, false},
+                    {"address", RPCArg::Type::STR, /* opt */ false, /* default_val */ "", "The bitcoin address to be associated with a label."},
+                    {"label", RPCArg::Type::STR, /* opt */ false, /* default_val */ "", "The label to assign to the address."},
                 }}
                 .ToString() +
-            "\nArguments:\n"
-            "1. \"address\"         (string, required) The bitcoin address to be associated with a label.\n"
-            "2. \"label\"           (string, required) The label to assign to the address.\n"
             "\nExamples:\n"
             + HelpExampleCli("setlabel", "\"1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XX\" \"tabby\"")
             + HelpExampleRpc("setlabel", "\"1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XX\", \"tabby\"")
@@ -358,35 +350,26 @@ static UniValue sendtoaddress(const JSONRPCRequest& request)
     if (request.fHelp || request.params.size() < 2 || request.params.size() > 8)
         throw std::runtime_error(
             RPCHelpMan{"sendtoaddress",
-                "\nSend an amount to a given address.\n",
+                "\nSend an amount to a given address." +
+                    HelpRequiringPassphrase(pwallet) + "\n",
                 {
-                    {"address", RPCArg::Type::STR, false},
-                    {"amount", RPCArg::Type::AMOUNT, false},
-                    {"comment", RPCArg::Type::STR, true},
-                    {"comment_to", RPCArg::Type::STR, true},
-                    {"subtractfeefromamount", RPCArg::Type::BOOL, true},
-                    {"replaceable", RPCArg::Type::BOOL, true},
-                    {"conf_target", RPCArg::Type::NUM, true},
-                    {"estimate_mode", RPCArg::Type::STR, true},
-                }}
-                .ToString() +
-            HelpRequiringPassphrase(pwallet) +
-            "\nArguments:\n"
-            "1. \"address\"            (string, required) The bitcoin address to send to.\n"
-            "2. \"amount\"             (numeric or string, required) The amount in " + CURRENCY_UNIT + " to send. eg 0.1\n"
-            "3. \"comment\"            (string, optional) A comment used to store what the transaction is for. \n"
-            "                             This is not part of the transaction, just kept in your wallet.\n"
-            "4. \"comment_to\"         (string, optional) A comment to store the name of the person or organization \n"
+                    {"address", RPCArg::Type::STR, /* opt */ false, /* default_val */ "", "The bitcoin address to send to."},
+                    {"amount", RPCArg::Type::AMOUNT, /* opt */ false, /* default_val */ "", "The amount in " + CURRENCY_UNIT + " to send. eg 0.1"},
+                    {"comment", RPCArg::Type::STR, /* opt */ true, /* default_val */ "", "A comment used to store what the transaction is for.\n"
+            "                             This is not part of the transaction, just kept in your wallet."},
+                    {"comment_to", RPCArg::Type::STR, /* opt */ true, /* default_val */ "", "A comment to store the name of the person or organization\n"
             "                             to which you're sending the transaction. This is not part of the \n"
-            "                             transaction, just kept in your wallet.\n"
-            "5. subtractfeefromamount  (boolean, optional, default=false) The fee will be deducted from the amount being sent.\n"
-            "                             The recipient will receive less bitcoins than you enter in the amount field.\n"
-            "6. replaceable            (boolean, optional) Allow this transaction to be replaced by a transaction with higher fees via BIP 125\n"
-            "7. conf_target            (numeric, optional) Confirmation target (in blocks)\n"
-            "8. \"estimate_mode\"      (string, optional, default=UNSET) The fee estimate mode, must be one of:\n"
+            "                             transaction, just kept in your wallet."},
+                    {"subtractfeefromamount", RPCArg::Type::BOOL, /* opt */ true, /* default_val */ "false", "The fee will be deducted from the amount being sent.\n"
+            "                             The recipient will receive less bitcoins than you enter in the amount field."},
+                    {"replaceable", RPCArg::Type::BOOL, /* opt */ true, /* default_val */ "", "Allow this transaction to be replaced by a transaction with higher fees via BIP 125"},
+                    {"conf_target", RPCArg::Type::NUM, /* opt */ true, /* default_val */ "", "Confirmation target (in blocks)"},
+                    {"estimate_mode", RPCArg::Type::STR, /* opt */ true, /* default_val */ "UNSET", "The fee estimate mode, must be one of:\n"
             "       \"UNSET\"\n"
             "       \"ECONOMICAL\"\n"
-            "       \"CONSERVATIVE\"\n"
+            "       \"CONSERVATIVE\""},
+                }}
+                .ToString() +
             "\nResult:\n"
             "\"txid\"                  (string) The transaction id.\n"
             "\nExamples:\n"
@@ -521,16 +504,13 @@ static UniValue signmessage(const JSONRPCRequest& request)
     if (request.fHelp || request.params.size() != 2)
         throw std::runtime_error(
             RPCHelpMan{"signmessage",
-                "\nSign a message with the private key of an address",
+                "\nSign a message with the private key of an address" +
+                    HelpRequiringPassphrase(pwallet) + "\n",
                 {
-                    {"address", RPCArg::Type::STR, false},
-                    {"message", RPCArg::Type::STR, false},
+                    {"address", RPCArg::Type::STR, /* opt */ false, /* default_val */ "", "The bitcoin address to use for the private key."},
+                    {"message", RPCArg::Type::STR, /* opt */ false, /* default_val */ "", "The message to create a signature of."},
                 }}
                 .ToString() +
-            HelpRequiringPassphrase(pwallet) + "\n"
-            "\nArguments:\n"
-            "1. \"address\"         (string, required) The bitcoin address to use for the private key.\n"
-            "2. \"message\"         (string, required) The message to create a signature of.\n"
             "\nResult:\n"
             "\"signature\"          (string) The signature of the message encoded in base 64\n"
             "\nExamples:\n"
@@ -592,13 +572,10 @@ static UniValue getreceivedbyaddress(const JSONRPCRequest& request)
             RPCHelpMan{"getreceivedbyaddress",
                 "\nReturns the total amount received by the given address in transactions with at least minconf confirmations.\n",
                 {
-                    {"address", RPCArg::Type::STR, false},
-                    {"minconf", RPCArg::Type::NUM, true},
+                    {"address", RPCArg::Type::STR, /* opt */ false, /* default_val */ "", "The bitcoin address for transactions."},
+                    {"minconf", RPCArg::Type::NUM, /* opt */ true, /* default_val */ "1", "Only include transactions confirmed at least this many times."},
                 }}
                 .ToString() +
-            "\nArguments:\n"
-            "1. \"address\"         (string, required) The bitcoin address for transactions.\n"
-            "2. minconf             (numeric, optional, default=1) Only include transactions confirmed at least this many times.\n"
             "\nResult:\n"
             "amount   (numeric) The total amount in " + CURRENCY_UNIT + " received at this address.\n"
             "\nExamples:\n"
@@ -666,13 +643,10 @@ static UniValue getreceivedbylabel(const JSONRPCRequest& request)
             RPCHelpMan{"getreceivedbylabel",
                 "\nReturns the total amount received by addresses with <label> in transactions with at least [minconf] confirmations.\n",
                 {
-                    {"label", RPCArg::Type::STR, false},
-                    {"minconf", RPCArg::Type::NUM, true},
+                    {"label", RPCArg::Type::STR, /* opt */ false, /* default_val */ "", "The selected label, may be the default label using \"\"."},
+                    {"minconf", RPCArg::Type::NUM, /* opt */ true, /* default_val */ "1", "Only include transactions confirmed at least this many times."},
                 }}
                 .ToString() +
-            "\nArguments:\n"
-            "1. \"label\"        (string, required) The selected label, may be the default label using \"\".\n"
-            "2. minconf          (numeric, optional, default=1) Only include transactions confirmed at least this many times.\n"
             "\nResult:\n"
             "amount              (numeric) The total amount in " + CURRENCY_UNIT + " received for this label.\n"
             "\nExamples:\n"
@@ -740,15 +714,11 @@ static UniValue getbalance(const JSONRPCRequest& request)
                 "The available balance is what the wallet considers currently spendable, and is\n"
                 "thus affected by options which limit spendability such as -spendzeroconfchange.\n",
                 {
-                    {"dummy", RPCArg::Type::STR, true},
-                    {"minconf", RPCArg::Type::NUM, true},
-                    {"include_watchonly", RPCArg::Type::NUM, true},
+                    {"dummy", RPCArg::Type::STR, /* opt */ true, /* default_val */ "", "Remains for backward compatibility. Must be excluded or set to \"*\"."},
+                    {"minconf", RPCArg::Type::NUM, /* opt */ true, /* default_val */ "0", "Only include transactions confirmed at least this many times."},
+                    {"include_watchonly", RPCArg::Type::BOOL, /* opt */ true, /* default_val */ "false", "Also include balance in watch-only addresses (see 'importaddress')"},
                 }}
                 .ToString() +
-            "\nArguments:\n"
-            "1. (dummy)           (string, optional) Remains for backward compatibility. Must be excluded or set to \"*\".\n"
-            "2. minconf           (numeric, optional, default=0) Only include transactions confirmed at least this many times.\n"
-            "3. include_watchonly (bool, optional, default=false) Also include balance in watch-only addresses (see 'importaddress')\n"
             "\nResult:\n"
             "amount              (numeric) The total amount in " + CURRENCY_UNIT + " received for this wallet.\n"
             "\nExamples:\n"
@@ -823,50 +793,33 @@ static UniValue sendmany(const JSONRPCRequest& request)
     if (request.fHelp || request.params.size() < 2 || request.params.size() > 8)
         throw std::runtime_error(
             RPCHelpMan{"sendmany",
-                "\nSend multiple times. Amounts are double-precision floating point numbers.\n",
+                "\nSend multiple times. Amounts are double-precision floating point numbers." +
+                    HelpRequiringPassphrase(pwallet) + "\n",
                 {
-                    {"dummy", RPCArg::Type::STR, false, "\"\""},
-                    {"amounts", RPCArg::Type::OBJ,
-                        {
-                            {"address", RPCArg::Type::AMOUNT, false},
-                        },
-                        false},
-                    {"minconf", RPCArg::Type::NUM, true},
-                    {"comment", RPCArg::Type::STR, true},
-                    {"subtractfeefrom", RPCArg::Type::ARR,
+                    {"dummy", RPCArg::Type::STR, /* opt */ false, /* default_val */ "", "Must be set to \"\" for backwards compatibility.", "\"\""},
+                    {"amounts", RPCArg::Type::OBJ, /* opt */ false, /* default_val */ "", "A json object with addresses and amounts",
                         {
-                            {"address", RPCArg::Type::STR, true},
+                            {"address", RPCArg::Type::AMOUNT, /* opt */ false, /* default_val */ "", "The bitcoin address is the key, the numeric amount (can be string) in " + CURRENCY_UNIT + " is the value"},
                         },
-                        true},
-                    {"replaceable", RPCArg::Type::BOOL, true},
-                    {"conf_target", RPCArg::Type::NUM, true},
-                    {"estimate_mode", RPCArg::Type::STR, true},
-                }}
-                .ToString() +
-            HelpRequiringPassphrase(pwallet) + "\n"
-            "\nArguments:\n"
-            "1. \"dummy\"               (string, required) Must be set to \"\" for backwards compatibility.\n"
-            "2. \"amounts\"             (string, required) A json object with addresses and amounts\n"
-            "    {\n"
-            "      \"address\":amount   (numeric or string) The bitcoin address is the key, the numeric amount (can be string) in " + CURRENCY_UNIT + " is the value\n"
-            "      ,...\n"
-            "    }\n"
-            "3. minconf                 (numeric, optional, default=1) Only use the balance confirmed at least this many times.\n"
-            "4. \"comment\"             (string, optional) A comment\n"
-            "5. subtractfeefrom         (array, optional) A json array with addresses.\n"
+                    },
+                    {"minconf", RPCArg::Type::NUM, /* opt */ true, /* default_val */ "1", "Only use the balance confirmed at least this many times."},
+                    {"comment", RPCArg::Type::STR, /* opt */ true, /* default_val */ "", "A comment"},
+                    {"subtractfeefrom", RPCArg::Type::ARR, /* opt */ true, /* default_val */ "", "A json array with addresses.\n"
             "                           The fee will be equally deducted from the amount of each selected address.\n"
             "                           Those recipients will receive less bitcoins than you enter in their corresponding amount field.\n"
-            "                           If no addresses are specified here, the sender pays the fee.\n"
-            "    [\n"
-            "      \"address\"          (string) Subtract fee from this address\n"
-            "      ,...\n"
-            "    ]\n"
-            "6. replaceable            (boolean, optional) Allow this transaction to be replaced by a transaction with higher fees via BIP 125\n"
-            "7. conf_target            (numeric, optional) Confirmation target (in blocks)\n"
-            "8. \"estimate_mode\"      (string, optional, default=UNSET) The fee estimate mode, must be one of:\n"
+            "                           If no addresses are specified here, the sender pays the fee.",
+                        {
+                            {"address", RPCArg::Type::STR, /* opt */ true, /* default_val */ "", "Subtract fee from this address"},
+                        },
+                    },
+                    {"replaceable", RPCArg::Type::BOOL, /* opt */ true, /* default_val */ "", "Allow this transaction to be replaced by a transaction with higher fees via BIP 125"},
+                    {"conf_target", RPCArg::Type::NUM, /* opt */ true, /* default_val */ "", "Confirmation target (in blocks)"},
+                    {"estimate_mode", RPCArg::Type::STR, /* opt */ true, /* default_val */ "UNSET", "The fee estimate mode, must be one of:\n"
             "       \"UNSET\"\n"
             "       \"ECONOMICAL\"\n"
-            "       \"CONSERVATIVE\"\n"
+            "       \"CONSERVATIVE\""},
+                }}
+                .ToString() +
              "\nResult:\n"
             "\"txid\"                   (string) The transaction id for the send. Only 1 transaction is created regardless of \n"
             "                                    the number of addresses.\n"
@@ -994,23 +947,24 @@ static UniValue addmultisigaddress(const JSONRPCRequest& request)
     }
 
     if (request.fHelp || request.params.size() < 2 || request.params.size() > 4) {
-        std::string msg = "addmultisigaddress nrequired [\"key\",...] ( \"label\" \"address_type\" )\n"
-            "\nAdd a nrequired-to-sign multisignature address to the wallet. Requires a new wallet backup.\n"
-            "Each key is a Bitcoin address or hex-encoded public key.\n"
-            "This functionality is only intended for use with non-watchonly addresses.\n"
-            "See `importaddress` for watchonly p2sh address support.\n"
-            "If 'label' is specified, assign address to that label.\n"
-
-            "\nArguments:\n"
-            "1. nrequired                      (numeric, required) The number of required signatures out of the n keys or addresses.\n"
-            "2. \"keys\"                         (string, required) A json array of bitcoin addresses or hex-encoded public keys\n"
-            "     [\n"
-            "       \"address\"                  (string) bitcoin address or hex-encoded public key\n"
-            "       ...,\n"
-            "     ]\n"
-            "3. \"label\"                        (string, optional) A label to assign the addresses to.\n"
-            "4. \"address_type\"                 (string, optional) The address type to use. Options are \"legacy\", \"p2sh-segwit\", and \"bech32\". Default is set by -addresstype.\n"
-
+        std::string msg =
+            RPCHelpMan{"addmultisigaddress",
+                "\nAdd a nrequired-to-sign multisignature address to the wallet. Requires a new wallet backup.\n"
+                "Each key is a Bitcoin address or hex-encoded public key.\n"
+                "This functionality is only intended for use with non-watchonly addresses.\n"
+                "See `importaddress` for watchonly p2sh address support.\n"
+                "If 'label' is specified, assign address to that label.\n",
+                {
+                    {"nrequired", RPCArg::Type::NUM, /* opt */ false, /* default_val */ "", "The number of required signatures out of the n keys or addresses."},
+                    {"keys", RPCArg::Type::ARR, /* opt */ false, /* default_val */ "", "A json array of bitcoin addresses or hex-encoded public keys",
+                        {
+                            {"key", RPCArg::Type::STR, /* opt */ false, /* default_val */ "", "bitcoin address or hex-encoded public key"},
+                        },
+                        },
+                    {"label", RPCArg::Type::STR, /* opt */ true, /* default_val */ "", "A label to assign the addresses to."},
+                    {"address_type", RPCArg::Type::STR, /* opt */ true, /* default_val */ "", "The address type to use. Options are \"legacy\", \"p2sh-segwit\", and \"bech32\". Default is set by -addresstype."},
+                }}
+                .ToString() +
             "\nResult:\n"
             "{\n"
             "  \"address\":\"multisigaddress\",    (string) The value of the new multisig address.\n"
@@ -1237,17 +1191,12 @@ static UniValue listreceivedbyaddress(const JSONRPCRequest& request)
             RPCHelpMan{"listreceivedbyaddress",
                 "\nList balances by receiving address.\n",
                 {
-                    {"minconf", RPCArg::Type::NUM, true},
-                    {"include_empty", RPCArg::Type::BOOL, true},
-                    {"include_watchonly", RPCArg::Type::BOOL, true},
-                    {"address_filter", RPCArg::Type::STR, true},
+                    {"minconf", RPCArg::Type::NUM, /* opt */ true, /* default_val */ "1", "The minimum number of confirmations before payments are included."},
+                    {"include_empty", RPCArg::Type::BOOL, /* opt */ true, /* default_val */ "false", "Whether to include addresses that haven't received any payments."},
+                    {"include_watchonly", RPCArg::Type::BOOL, /* opt */ true, /* default_val */ "false", "Whether to include watch-only addresses (see 'importaddress')."},
+                    {"address_filter", RPCArg::Type::STR, /* opt */ true, /* default_val */ "", "If present, only return information on this address."},
                 }}
                 .ToString() +
-            "\nArguments:\n"
-            "1. minconf           (numeric, optional, default=1) The minimum number of confirmations before payments are included.\n"
-            "2. include_empty     (bool, optional, default=false) Whether to include addresses that haven't received any payments.\n"
-            "3. include_watchonly (bool, optional, default=false) Whether to include watch-only addresses (see 'importaddress').\n"
-            "4. address_filter    (string, optional) If present, only return information on this address.\n"
             "\nResult:\n"
             "[\n"
             "  {\n"
@@ -1295,16 +1244,11 @@ static UniValue listreceivedbylabel(const JSONRPCRequest& request)
             RPCHelpMan{"listreceivedbylabel",
                 "\nList received transactions by label.\n",
                 {
-                    {"minconf", RPCArg::Type::NUM, true},
-                    {"include_empty", RPCArg::Type::BOOL, true},
-                    {"include_watchonly", RPCArg::Type::BOOL, true},
+                    {"minconf", RPCArg::Type::NUM, /* opt */ true, /* default_val */ "1", "The minimum number of confirmations before payments are included."},
+                    {"include_empty", RPCArg::Type::BOOL, /* opt */ true, /* default_val */ "false", "Whether to include labels that haven't received any payments."},
+                    {"include_watchonly", RPCArg::Type::BOOL, /* opt */ true, /* default_val */ "false", "Whether to include watch-only addresses (see 'importaddress')."},
                 }}
                 .ToString() +
-            "\nArguments:\n"
-            "1. minconf           (numeric, optional, default=1) The minimum number of confirmations before payments are included.\n"
-            "2. include_empty     (bool, optional, default=false) Whether to include labels that haven't received any payments.\n"
-            "3. include_watchonly (bool, optional, default=false) Whether to include watch-only addresses (see 'importaddress').\n"
-
             "\nResult:\n"
             "[\n"
             "  {\n"
@@ -1441,18 +1385,13 @@ UniValue listtransactions(const JSONRPCRequest& request)
                 "\nIf a label name is provided, this will return only incoming transactions paying to addresses with the specified label.\n"
                 "\nReturns up to 'count' most recent transactions skipping the first 'from' transactions.\n",
                 {
-                    {"label", RPCArg::Type::STR, true},
-                    {"count", RPCArg::Type::NUM, true},
-                    {"skip", RPCArg::Type::NUM, true},
-                    {"include_watchonly", RPCArg::Type::BOOL, true},
+                    {"label", RPCArg::Type::STR, /* opt */ true, /* default_val */ "", "If set, should be a valid label name to return only incoming transactions\n"
+            "              with the specified label, or \"*\" to disable filtering and return all transactions."},
+                    {"count", RPCArg::Type::NUM, /* opt */ true, /* default_val */ "10", "The number of transactions to return"},
+                    {"skip", RPCArg::Type::NUM, /* opt */ true, /* default_val */ "0", "The number of transactions to skip"},
+                    {"include_watchonly", RPCArg::Type::BOOL, /* opt */ true, /* default_val */ "false", "Include transactions to watch-only addresses (see 'importaddress')"},
                 }}
                 .ToString() +
-            "\nArguments:\n"
-            "1. \"label\"    (string, optional) If set, should be a valid label name to return only incoming transactions\n"
-            "              with the specified label, or \"*\" to disable filtering and return all transactions.\n"
-            "2. count          (numeric, optional, default=10) The number of transactions to return\n"
-            "3. skip           (numeric, optional, default=0) The number of transactions to skip\n"
-            "4. include_watchonly (bool, optional, default=false) Include transactions to watch-only addresses (see 'importaddress')\n"
             "\nResult:\n"
             "[\n"
             "  {\n"
@@ -1576,18 +1515,13 @@ static UniValue listsinceblock(const JSONRPCRequest& request)
                 "If \"blockhash\" is no longer a part of the main chain, transactions from the fork point onward are included.\n"
                 "Additionally, if include_removed is set, transactions affecting the wallet which were removed are returned in the \"removed\" array.\n",
                 {
-                    {"blockhash", RPCArg::Type::STR, true},
-                    {"target_confirmations", RPCArg::Type::NUM, true},
-                    {"include_watchonly", RPCArg::Type::BOOL, true},
-                    {"include_removed", RPCArg::Type::BOOL, true},
+                    {"blockhash", RPCArg::Type::STR, /* opt */ true, /* default_val */ "", "The block hash to list transactions since"},
+                    {"target_confirmations", RPCArg::Type::NUM, /* opt */ true, /* default_val */ "1", "Return the nth block hash from the main chain. e.g. 1 would mean the best block hash. Note: this is not used as a filter, but only affects [lastblock] in the return value"},
+                    {"include_watchonly", RPCArg::Type::BOOL, /* opt */ true, /* default_val */ "false", "Include transactions to watch-only addresses (see 'importaddress')"},
+                    {"include_removed", RPCArg::Type::BOOL, /* opt */ true, /* default_val */ "true", "Show transactions that were removed due to a reorg in the \"removed\" array\n"
+            "                                                           (not guaranteed to work on pruned nodes)"},
                 }}
                 .ToString() +
-            "\nArguments:\n"
-            "1. \"blockhash\"            (string, optional) The block hash to list transactions since\n"
-            "2. target_confirmations:    (numeric, optional, default=1) Return the nth block hash from the main chain. e.g. 1 would mean the best block hash. Note: this is not used as a filter, but only affects [lastblock] in the return value\n"
-            "3. include_watchonly:       (bool, optional, default=false) Include transactions to watch-only addresses (see 'importaddress')\n"
-            "4. include_removed:         (bool, optional, default=true) Show transactions that were removed due to a reorg in the \"removed\" array\n"
-            "                                                           (not guaranteed to work on pruned nodes)\n"
             "\nResult:\n"
             "{\n"
             "  \"transactions\": [\n"
@@ -1721,13 +1655,10 @@ static UniValue gettransaction(const JSONRPCRequest& request)
             RPCHelpMan{"gettransaction",
                 "\nGet detailed information about in-wallet transaction <txid>\n",
                 {
-                    {"txid", RPCArg::Type::STR, false},
-                    {"include_watchonly", RPCArg::Type::BOOL, true},
+                    {"txid", RPCArg::Type::STR, /* opt */ false, /* default_val */ "", "The transaction id"},
+                    {"include_watchonly", RPCArg::Type::BOOL, /* opt */ true, /* default_val */ "false", "Whether to include watch-only addresses in balance calculation and details[]"},
                 }}
                 .ToString() +
-            "\nArguments:\n"
-            "1. \"txid\"                  (string, required) The transaction id\n"
-            "2. \"include_watchonly\"     (bool, optional, default=false) Whether to include watch-only addresses in balance calculation and details[]\n"
             "\nResult:\n"
             "{\n"
             "  \"amount\" : x.xxx,        (numeric) The transaction amount in " + CURRENCY_UNIT + "\n"
@@ -1825,11 +1756,9 @@ static UniValue abandontransaction(const JSONRPCRequest& request)
                 "It only works on transactions which are not included in a block and are not currently in the mempool.\n"
                 "It has no effect on transactions which are already abandoned.\n",
                 {
-                    {"txid", RPCArg::Type::STR_HEX, false},
+                    {"txid", RPCArg::Type::STR_HEX, /* opt */ false, /* default_val */ "", "The transaction id"},
                 }}
                 .ToString() +
-            "\nArguments:\n"
-            "1. \"txid\"    (string, required) The transaction id\n"
             "\nResult:\n"
             "\nExamples:\n"
             + HelpExampleCli("abandontransaction", "\"1075db55d416d3ca199f55b6084e2115b9345e16c5cf302fc80e9d5fbf5d48d\"")
@@ -1871,11 +1800,9 @@ static UniValue backupwallet(const JSONRPCRequest& request)
             RPCHelpMan{"backupwallet",
                 "\nSafely copies current wallet file to destination, which can be a directory or a path with filename.\n",
                 {
-                    {"destination", RPCArg::Type::STR, false},
+                    {"destination", RPCArg::Type::STR, /* opt */ false, /* default_val */ "", "The destination directory or file"},
                 }}
                 .ToString() +
-            "\nArguments:\n"
-            "1. \"destination\"   (string) The destination directory or file\n"
             "\nExamples:\n"
             + HelpExampleCli("backupwallet", "\"backup.dat\"")
             + HelpExampleRpc("backupwallet", "\"backup.dat\"")
@@ -1909,14 +1836,12 @@ static UniValue keypoolrefill(const JSONRPCRequest& request)
     if (request.fHelp || request.params.size() > 1)
         throw std::runtime_error(
             RPCHelpMan{"keypoolrefill",
-                "\nFills the keypool.",
+                "\nFills the keypool."+
+                    HelpRequiringPassphrase(pwallet) + "\n",
                 {
-                    {"newsize", RPCArg::Type::NUM, true},
+                    {"newsize", RPCArg::Type::NUM, /* opt */ true, /* default_val */ "100", "The new keypool size"},
                 }}
                 .ToString() +
-            HelpRequiringPassphrase(pwallet) + "\n"
-            "\nArguments\n"
-            "1. newsize     (numeric, optional, default=100) The new keypool size\n"
             "\nExamples:\n"
             + HelpExampleCli("keypoolrefill", "")
             + HelpExampleRpc("keypoolrefill", "")
@@ -1963,13 +1888,10 @@ static UniValue walletpassphrase(const JSONRPCRequest& request)
                 "\nStores the wallet decryption key in memory for 'timeout' seconds.\n"
                 "This is needed prior to performing transactions related to private keys such as sending bitcoins\n",
                 {
-                    {"passphrase", RPCArg::Type::STR, false},
-                    {"timeout", RPCArg::Type::NUM, false},
+                    {"passphrase", RPCArg::Type::STR, /* opt */ false, /* default_val */ "", "The wallet passphrase"},
+                    {"timeout", RPCArg::Type::NUM, /* opt */ false, /* default_val */ "", "The time to keep the decryption key in seconds; capped at 100000000 (~3 years)."},
                 }}
                 .ToString() +
-            "\nArguments:\n"
-            "1. \"passphrase\"     (string, required) The wallet passphrase\n"
-            "2. timeout            (numeric, required) The time to keep the decryption key in seconds; capped at 100000000 (~3 years).\n"
             "\nNote:\n"
             "Issuing the walletpassphrase command while the wallet is already unlocked will set a new unlock\n"
             "time that overrides the old one.\n"
@@ -2051,13 +1973,10 @@ static UniValue walletpassphrasechange(const JSONRPCRequest& request)
             RPCHelpMan{"walletpassphrasechange",
                 "\nChanges the wallet passphrase from 'oldpassphrase' to 'newpassphrase'.\n",
                 {
-                    {"oldpassphrase", RPCArg::Type::STR, false},
-                    {"newpassphrase", RPCArg::Type::STR, false},
+                    {"oldpassphrase", RPCArg::Type::STR, /* opt */ false, /* default_val */ "", "The current passphrase"},
+                    {"newpassphrase", RPCArg::Type::STR, /* opt */ false, /* default_val */ "", "The new passphrase"},
                 }}
                 .ToString() +
-            "\nArguments:\n"
-            "1. \"oldpassphrase\"      (string) The current passphrase\n"
-            "2. \"newpassphrase\"      (string) The new passphrase\n"
             "\nExamples:\n"
             + HelpExampleCli("walletpassphrasechange", "\"old one\" \"new one\"")
             + HelpExampleRpc("walletpassphrasechange", "\"old one\", \"new one\"")
@@ -2154,11 +2073,9 @@ static UniValue encryptwallet(const JSONRPCRequest& request)
                 "Use the walletpassphrase call for this, and then walletlock call.\n"
                 "If the wallet is already encrypted, use the walletpassphrasechange call.\n",
                 {
-                    {"passphrase", RPCArg::Type::STR, false},
+                    {"passphrase", RPCArg::Type::STR, /* opt */ false, /* default_val */ "", "The pass phrase to encrypt the wallet with. It must be at least 1 character, but should be long."},
                 }}
                 .ToString() +
-            "\nArguments:\n"
-            "1. \"passphrase\"    (string) The pass phrase to encrypt the wallet with. It must be at least 1 character, but should be long.\n"
             "\nExamples:\n"
             "\nEncrypt your wallet\n"
             + HelpExampleCli("encryptwallet", "\"my pass phrase\"") +
@@ -2217,30 +2134,19 @@ static UniValue lockunspent(const JSONRPCRequest& request)
                 "is always cleared (by virtue of process exit) when a node stops or fails.\n"
                 "Also see the listunspent call\n",
                 {
-                    {"unlock", RPCArg::Type::BOOL, false},
-                    {"transactions", RPCArg::Type::ARR,
+                    {"unlock", RPCArg::Type::BOOL, /* opt */ false, /* default_val */ "", "Whether to unlock (true) or lock (false) the specified transactions"},
+                    {"transactions", RPCArg::Type::ARR, /* opt */ true, /* default_val */ "", "A json array of objects. Each object the txid (string) vout (numeric)",
                         {
-                            {"", RPCArg::Type::OBJ,
+                            {"", RPCArg::Type::OBJ, /* opt */ true, /* default_val */ "", "",
                                 {
-                                    {"txid", RPCArg::Type::STR_HEX, false},
-                                    {"vout", RPCArg::Type::NUM, false},
+                                    {"txid", RPCArg::Type::STR_HEX, /* opt */ false, /* default_val */ "", "The transaction id"},
+                                    {"vout", RPCArg::Type::NUM, /* opt */ false, /* default_val */ "", "The output number"},
                                 },
-                                true},
+                            },
                         },
-                        true},
+                    },
                 }}
                 .ToString() +
-            "\nArguments:\n"
-            "1. unlock            (boolean, required) Whether to unlock (true) or lock (false) the specified transactions\n"
-            "2. \"transactions\"  (string, optional) A json array of objects. Each object the txid (string) vout (numeric)\n"
-            "     [           (json array of json objects)\n"
-            "       {\n"
-            "         \"txid\":\"id\",    (string) The transaction id\n"
-            "         \"vout\": n         (numeric) The output number\n"
-            "       }\n"
-            "       ,...\n"
-            "     ]\n"
-
             "\nResult:\n"
             "true|false    (boolean) Whether the command was successful or not\n"
 
@@ -2407,11 +2313,9 @@ static UniValue settxfee(const JSONRPCRequest& request)
             RPCHelpMan{"settxfee",
                 "\nSet the transaction fee per kB for this wallet. Overrides the global -paytxfee command line parameter.\n",
                 {
-                    {"amount", RPCArg::Type::NUM, false},
+                    {"amount", RPCArg::Type::AMOUNT, /* opt */ false, /* default_val */ "", "The transaction fee in " + CURRENCY_UNIT + "/kB"},
                 }}
                 .ToString() +
-            "\nArguments:\n"
-            "1. amount         (numeric or string, required) The transaction fee in " + CURRENCY_UNIT + "/kB\n"
             "\nResult\n"
             "true|false        (boolean) Returns true if successful\n"
             "\nExamples:\n"
@@ -2583,11 +2487,9 @@ static UniValue loadwallet(const JSONRPCRequest& request)
                 "\nNote that all wallet command-line options used when starting bitcoind will be"
                 "\napplied to the new wallet (eg -zapwallettxes, upgradewallet, rescan, etc).\n",
                 {
-                    {"filename", RPCArg::Type::STR, false},
+                    {"filename", RPCArg::Type::STR, /* opt */ false, /* default_val */ "", "The wallet directory or .dat file."},
                 }}
                 .ToString() +
-            "\nArguments:\n"
-            "1. \"filename\"    (string, required) The wallet directory or .dat file.\n"
             "\nResult:\n"
             "{\n"
             "  \"name\" :    <wallet_name>,        (string) The wallet name if loaded successfully.\n"
@@ -2638,13 +2540,10 @@ static UniValue createwallet(const JSONRPCRequest& request)
             RPCHelpMan{"createwallet",
                 "\nCreates and loads a new wallet.\n",
                 {
-                    {"wallet_name", RPCArg::Type::STR, false},
-                    {"disable_private_keys", RPCArg::Type::BOOL, true},
+                    {"wallet_name", RPCArg::Type::STR, /* opt */ false, /* default_val */ "", "The name for the new wallet. If this is a path, the wallet will be created at the path location."},
+                    {"disable_private_keys", RPCArg::Type::BOOL, /* opt */ true, /* default_val */ "false", "Disable the possibility of private keys (only watchonlys are possible in this mode)."},
                 }}
                 .ToString() +
-            "\nArguments:\n"
-            "1. \"wallet_name\"          (string, required) The name for the new wallet. If this is a path, the wallet will be created at the path location.\n"
-            "2. disable_private_keys   (boolean, optional, default: false) Disable the possibility of private keys (only watchonlys are possible in this mode).\n"
             "\nResult:\n"
             "{\n"
             "  \"name\" :    <wallet_name>,        (string) The wallet name if created successfully. If the wallet was created using a full path, the wallet_name will be the full path.\n"
@@ -2696,11 +2595,9 @@ static UniValue unloadwallet(const JSONRPCRequest& request)
                 "Unloads the wallet referenced by the request endpoint otherwise unloads the wallet specified in the argument.\n"
                 "Specifying the wallet name on a wallet endpoint is invalid.",
                 {
-                    {"wallet_name", RPCArg::Type::STR, true},
+                    {"wallet_name", RPCArg::Type::STR, /* opt */ true, /* default_val */ "", "The name of the wallet to unload."},
                 }}
                 .ToString() +
-            "\nArguments:\n"
-            "1. \"wallet_name\"    (string, optional) The name of the wallet to unload.\n"
             "\nExamples:\n"
             + HelpExampleCli("unloadwallet", "wallet_name")
             + HelpExampleRpc("unloadwallet", "wallet_name")
@@ -2797,41 +2694,25 @@ static UniValue listunspent(const JSONRPCRequest& request)
                 "with between minconf and maxconf (inclusive) confirmations.\n"
                 "Optionally filter to only include txouts paid to specified addresses.\n",
                 {
-                    {"minconf", RPCArg::Type::NUM, true},
-                    {"maxconf", RPCArg::Type::NUM, true},
-                    {"addresses", RPCArg::Type::ARR,
+                    {"minconf", RPCArg::Type::NUM, /* opt */ true, /* default_val */ "1", "The minimum confirmations to filter"},
+                    {"maxconf", RPCArg::Type::NUM, /* opt */ true, /* default_val */ "9999999", "The maximum confirmations to filter"},
+                    {"addresses", RPCArg::Type::ARR, /* opt */ true, /* default_val */ "", "A json array of bitcoin addresses to filter",
                         {
-                            {"address", RPCArg::Type::STR, true},
+                            {"address", RPCArg::Type::STR, /* opt */ true, /* default_val */ "", "bitcoin address"},
                         },
-                        true},
-                    {"include_unsafe", RPCArg::Type::BOOL, true},
-                    {"query_options", RPCArg::Type::OBJ,
+                    },
+                    {"include_unsafe", RPCArg::Type::BOOL, /* opt */ true, /* default_val */ "true", "Include outputs that are not safe to spend\n"
+            "                  See description of \"safe\" attribute below."},
+                    {"query_options", RPCArg::Type::OBJ, /* opt */ true, /* default_val */ "", "JSON with query options",
                         {
-                            {"minimumAmount", RPCArg::Type::AMOUNT, true},
-                            {"maximumAmount", RPCArg::Type::AMOUNT, true},
-                            {"maximumCount", RPCArg::Type::NUM, true},
-                            {"minimumSumAmount", RPCArg::Type::AMOUNT, true},
+                            {"minimumAmount", RPCArg::Type::AMOUNT, /* opt */ true, /* default_val */ "0", "Minimum value of each UTXO in " + CURRENCY_UNIT + ""},
+                            {"maximumAmount", RPCArg::Type::AMOUNT, /* opt */ true, /* default_val */ "unlimited", "Maximum value of each UTXO in " + CURRENCY_UNIT + ""},
+                            {"maximumCount", RPCArg::Type::NUM, /* opt */ true, /* default_val */ "unlimited", "Maximum number of UTXOs"},
+                            {"minimumSumAmount", RPCArg::Type::AMOUNT, /* opt */ true, /* default_val */ "unlimited", "Minimum sum value of all UTXOs in " + CURRENCY_UNIT + ""},
                         },
-                        true, "query_options"},
+                        "query_options"},
                 }}
                 .ToString() +
-            "\nArguments:\n"
-            "1. minconf          (numeric, optional, default=1) The minimum confirmations to filter\n"
-            "2. maxconf          (numeric, optional, default=9999999) The maximum confirmations to filter\n"
-            "3. \"addresses\"      (string) A json array of bitcoin addresses to filter\n"
-            "    [\n"
-            "      \"address\"     (string) bitcoin address\n"
-            "      ,...\n"
-            "    ]\n"
-            "4. include_unsafe (bool, optional, default=true) Include outputs that are not safe to spend\n"
-            "                  See description of \"safe\" attribute below.\n"
-            "5. query_options    (json, optional) JSON with query options\n"
-            "    {\n"
-            "      \"minimumAmount\"    (numeric or string, default=0) Minimum value of each UTXO in " + CURRENCY_UNIT + "\n"
-            "      \"maximumAmount\"    (numeric or string, default=unlimited) Maximum value of each UTXO in " + CURRENCY_UNIT + "\n"
-            "      \"maximumCount\"     (numeric or string, default=unlimited) Maximum number of UTXOs\n"
-            "      \"minimumSumAmount\" (numeric or string, default=unlimited) Minimum sum value of all UTXOs in " + CURRENCY_UNIT + "\n"
-            "    }\n"
             "\nResult\n"
             "[                   (array of json object)\n"
             "  {\n"
@@ -3109,56 +2990,37 @@ static UniValue fundrawtransaction(const JSONRPCRequest& request)
                 "You can see whether this is the case by checking the \"solvable\" field in the listunspent output.\n"
                 "Only pay-to-pubkey, multisig, and P2SH versions thereof are currently supported for watch-only\n",
                 {
-                    {"hexstring", RPCArg::Type::STR_HEX, false},
-                    {"options", RPCArg::Type::OBJ,
+                    {"hexstring", RPCArg::Type::STR_HEX, /* opt */ false, /* default_val */ "", "The hex string of the raw transaction"},
+                    {"options", RPCArg::Type::OBJ, /* opt */ true, /* default_val */ "", "for backward compatibility: passing in a true instead of an object will result in {\"includeWatching\":true}",
                         {
-                            {"changeAddress", RPCArg::Type::STR, true},
-                            {"changePosition", RPCArg::Type::NUM, true},
-                            {"change_type", RPCArg::Type::STR, true},
-                            {"includeWatching", RPCArg::Type::BOOL, true},
-                            {"lockUnspents", RPCArg::Type::BOOL, true},
-                            {"feeRate", RPCArg::Type::AMOUNT, true},
-                            {"subtractFeeFromOutputs", RPCArg::Type::ARR,
-                                {
-                                    {"vout_index", RPCArg::Type::NUM, true},
-                                },
-                                true},
-                            {"replaceable", RPCArg::Type::BOOL, true},
-                            {"conf_target", RPCArg::Type::NUM, true},
-                            {"estimate_mode", RPCArg::Type::STR, true},
-                        },
-                        true, "options"},
-                    {"iswitness", RPCArg::Type::BOOL, true},
-                }}
-                .ToString() +
-                            "\nArguments:\n"
-                            "1. \"hexstring\"           (string, required) The hex string of the raw transaction\n"
-                            "2. options                 (object, optional)\n"
-                            "   {\n"
-                            "     \"changeAddress\"          (string, optional, default pool address) The bitcoin address to receive the change\n"
-                            "     \"changePosition\"         (numeric, optional, default random) The index of the change output\n"
-                            "     \"change_type\"            (string, optional) The output type to use. Only valid if changeAddress is not specified. Options are \"legacy\", \"p2sh-segwit\", and \"bech32\". Default is set by -changetype.\n"
-                            "     \"includeWatching\"        (boolean, optional, default false) Also select inputs which are watch only\n"
-                            "     \"lockUnspents\"           (boolean, optional, default false) Lock selected unspent outputs\n"
-                            "     \"feeRate\"                (numeric, optional, default not set: makes wallet determine the fee) Set a specific fee rate in " + CURRENCY_UNIT + "/kB\n"
-                            "     \"subtractFeeFromOutputs\" (array, optional) A json array of integers.\n"
+                            {"changeAddress", RPCArg::Type::STR, /* opt */ true, /* default_val */ "pool address", "The bitcoin address to receive the change"},
+                            {"changePosition", RPCArg::Type::NUM, /* opt */ true, /* default_val */ "random", "The index of the change output"},
+                            {"change_type", RPCArg::Type::STR, /* opt */ true, /* default_val */ "", "The output type to use. Only valid if changeAddress is not specified. Options are \"legacy\", \"p2sh-segwit\", and \"bech32\". Default is set by -changetype."},
+                            {"includeWatching", RPCArg::Type::BOOL, /* opt */ true, /* default_val */ "false", "Also select inputs which are watch only"},
+                            {"lockUnspents", RPCArg::Type::BOOL, /* opt */ true, /* default_val */ "false", "Lock selected unspent outputs"},
+                            {"feeRate", RPCArg::Type::AMOUNT, /* opt */ true, /* default_val */ "not set: makes wallet determine the fee", "Set a specific fee rate in " + CURRENCY_UNIT + "/kB"},
+                            {"subtractFeeFromOutputs", RPCArg::Type::ARR, /* opt */ true, /* default_val */ "", "A json array of integers.\n"
                             "                              The fee will be equally deducted from the amount of each specified output.\n"
                             "                              The outputs are specified by their zero-based index, before any change output is added.\n"
                             "                              Those recipients will receive less bitcoins than you enter in their corresponding amount field.\n"
-                            "                              If no outputs are specified here, the sender pays the fee.\n"
-                            "                                  [vout_index,...]\n"
-                            "     \"replaceable\"            (boolean, optional) Marks this transaction as BIP125 replaceable.\n"
-                            "                              Allows this transaction to be replaced by a transaction with higher fees\n"
-                            "     \"conf_target\"            (numeric, optional) Confirmation target (in blocks)\n"
-                            "     \"estimate_mode\"          (string, optional, default=UNSET) The fee estimate mode, must be one of:\n"
+                            "                              If no outputs are specified here, the sender pays the fee.",
+                                {
+                                    {"vout_index", RPCArg::Type::NUM, /* opt */ true, /* default_val */ "", ""},
+                                },
+                            },
+                            {"replaceable", RPCArg::Type::BOOL, /* opt */ true, /* default_val */ "", "Marks this transaction as BIP125 replaceable.\n"
+                            "                              Allows this transaction to be replaced by a transaction with higher fees"},
+                            {"conf_target", RPCArg::Type::NUM, /* opt */ true, /* default_val */ "", "Confirmation target (in blocks)"},
+                            {"estimate_mode", RPCArg::Type::STR, /* opt */ true, /* default_val */ "UNSET", "The fee estimate mode, must be one of:\n"
                             "         \"UNSET\"\n"
                             "         \"ECONOMICAL\"\n"
-                            "         \"CONSERVATIVE\"\n"
-                            "   }\n"
-                            "                         for backward compatibility: passing in a true instead of an object will result in {\"includeWatching\":true}\n"
-                            "3. iswitness               (boolean, optional) Whether the transaction hex is a serialized witness transaction \n"
-                            "                              If iswitness is not present, heuristic tests will be used in decoding\n"
-
+                            "         \"CONSERVATIVE\""},
+                        },
+                        "options"},
+                    {"iswitness", RPCArg::Type::BOOL, /* opt */ true, /* default_val */ "", "Whether the transaction hex is a serialized witness transaction \n"
+                            "                              If iswitness is not present, heuristic tests will be used in decoding"},
+                }}
+                .ToString() +
                             "\nResult:\n"
                             "{\n"
                             "  \"hex\":       \"value\", (string)  The resulting raw transaction (hex-encoded string)\n"
@@ -3212,48 +3074,32 @@ UniValue signrawtransactionwithwallet(const JSONRPCRequest& request)
             RPCHelpMan{"signrawtransactionwithwallet",
                 "\nSign inputs for raw transaction (serialized, hex-encoded).\n"
                 "The second optional argument (may be null) is an array of previous transaction outputs that\n"
-                "this transaction depends on but may not yet be in the block chain.\n",
+                "this transaction depends on but may not yet be in the block chain." +
+                    HelpRequiringPassphrase(pwallet) + "\n",
                 {
-                    {"hexstring", RPCArg::Type::STR, false},
-                    {"prevtxs", RPCArg::Type::ARR,
+                    {"hexstring", RPCArg::Type::STR, /* opt */ false, /* default_val */ "", "The transaction hex string"},
+                    {"prevtxs", RPCArg::Type::ARR, /* opt */ true, /* default_val */ "", "A json array of previous dependent transaction outputs",
                         {
-                            {"", RPCArg::Type::OBJ,
+                            {"", RPCArg::Type::OBJ, /* opt */ false, /* default_val */ "", "",
                                 {
-                                    {"txid", RPCArg::Type::STR_HEX, false},
-                                    {"vout", RPCArg::Type::NUM, false},
-                                    {"scriptPubKey", RPCArg::Type::STR_HEX, false},
-                                    {"redeemScript", RPCArg::Type::STR_HEX, false},
-                                    {"amount", RPCArg::Type::AMOUNT, false},
+                                    {"txid", RPCArg::Type::STR_HEX, /* opt */ false, /* default_val */ "", "The transaction id"},
+                                    {"vout", RPCArg::Type::NUM, /* opt */ false, /* default_val */ "", "The output number"},
+                                    {"scriptPubKey", RPCArg::Type::STR_HEX, /* opt */ false, /* default_val */ "", "script key"},
+                                    {"redeemScript", RPCArg::Type::STR_HEX, /* opt */ true, /* default_val */ "", "(required for P2SH or P2WSH)"},
+                                    {"amount", RPCArg::Type::AMOUNT, /* opt */ false, /* default_val */ "", "The amount spent"},
                                 },
-                                false},
+                            },
                         },
-                        true},
-                    {"sighashtype", RPCArg::Type::STR, true},
-                }}
-                .ToString() +
-            HelpRequiringPassphrase(pwallet) + "\n"
-
-            "\nArguments:\n"
-            "1. \"hexstring\"                      (string, required) The transaction hex string\n"
-            "2. \"prevtxs\"                        (string, optional) An json array of previous dependent transaction outputs\n"
-            "     [                              (json array of json objects, or 'null' if none provided)\n"
-            "       {\n"
-            "         \"txid\":\"id\",               (string, required) The transaction id\n"
-            "         \"vout\":n,                  (numeric, required) The output number\n"
-            "         \"scriptPubKey\": \"hex\",     (string, required) script key\n"
-            "         \"redeemScript\": \"hex\",     (string, required for P2SH or P2WSH) redeem script\n"
-            "         \"amount\": value            (numeric, required) The amount spent\n"
-            "       }\n"
-            "       ,...\n"
-            "    ]\n"
-            "3. \"sighashtype\"                    (string, optional, default=ALL) The signature hash type. Must be one of\n"
+                    },
+                    {"sighashtype", RPCArg::Type::STR, /* opt */ true, /* default_val */ "ALL", "The signature hash type. Must be one of\n"
             "       \"ALL\"\n"
             "       \"NONE\"\n"
             "       \"SINGLE\"\n"
             "       \"ALL|ANYONECANPAY\"\n"
             "       \"NONE|ANYONECANPAY\"\n"
-            "       \"SINGLE|ANYONECANPAY\"\n"
-
+            "       \"SINGLE|ANYONECANPAY\""},
+                }}
+                .ToString() +
             "\nResult:\n"
             "{\n"
             "  \"hex\" : \"value\",                  (string) The hex-encoded raw transaction with signature(s)\n"
@@ -3314,38 +3160,29 @@ static UniValue bumpfee(const JSONRPCRequest& request)
                 "At a minimum, the new fee rate must be high enough to pay an additional new relay fee (incrementalfee\n"
                 "returned by getnetworkinfo) to enter the node's mempool.\n",
                 {
-                    {"txid", RPCArg::Type::STR_HEX, false},
-                    {"options", RPCArg::Type::OBJ,
+                    {"txid", RPCArg::Type::STR_HEX, /* opt */ false, /* default_val */ "", "The txid to be bumped"},
+                    {"options", RPCArg::Type::OBJ, /* opt */ true, /* default_val */ "", "",
                         {
-                            {"confTarget", RPCArg::Type::NUM, true},
-                            {"totalFee", RPCArg::Type::AMOUNT, true},
-                            {"replaceable", RPCArg::Type::BOOL, true},
-                            {"estimate_mode", RPCArg::Type::STR, true},
-                        },
-                        true, "options"},
-                }}
-                .ToString() +
-            "\nArguments:\n"
-            "1. txid                  (string, required) The txid to be bumped\n"
-            "2. options               (object, optional)\n"
-            "   {\n"
-            "     \"confTarget\"        (numeric, optional) Confirmation target (in blocks)\n"
-            "     \"totalFee\"          (numeric, optional) Total fee (NOT feerate) to pay, in satoshis.\n"
+                            {"confTarget", RPCArg::Type::NUM, /* opt */ true, /* default_val */ "", "Confirmation target (in blocks)"},
+                            {"totalFee", RPCArg::Type::NUM, /* opt */ true, /* default_val */ "", "Total fee (NOT feerate) to pay, in satoshis.\n"
             "                         In rare cases, the actual fee paid might be slightly higher than the specified\n"
             "                         totalFee if the tx change output has to be removed because it is too close to\n"
-            "                         the dust threshold.\n"
-            "     \"replaceable\"       (boolean, optional, default true) Whether the new transaction should still be\n"
+            "                         the dust threshold."},
+                            {"replaceable", RPCArg::Type::BOOL, /* opt */ true, /* default_val */ "true", "Whether the new transaction should still be\n"
             "                         marked bip-125 replaceable. If true, the sequence numbers in the transaction will\n"
             "                         be left unchanged from the original. If false, any input sequence numbers in the\n"
             "                         original transaction that were less than 0xfffffffe will be increased to 0xfffffffe\n"
             "                         so the new transaction will not be explicitly bip-125 replaceable (though it may\n"
             "                         still be replaceable in practice, for example if it has unconfirmed ancestors which\n"
-            "                         are replaceable).\n"
-            "     \"estimate_mode\"     (string, optional, default=UNSET) The fee estimate mode, must be one of:\n"
+            "                         are replaceable)."},
+                            {"estimate_mode", RPCArg::Type::STR, /* opt */ true, /* default_val */ "UNSET", "The fee estimate mode, must be one of:\n"
             "         \"UNSET\"\n"
             "         \"ECONOMICAL\"\n"
-            "         \"CONSERVATIVE\"\n"
-            "   }\n"
+            "         \"CONSERVATIVE\""},
+                        },
+                        "options"},
+                }}
+                .ToString() +
             "\nResult:\n"
             "{\n"
             "  \"txid\":    \"value\",   (string)  The id of the new transaction\n"
@@ -3468,13 +3305,10 @@ UniValue generate(const JSONRPCRequest& request)
             RPCHelpMan{"generate",
                 "\nMine up to nblocks blocks immediately (before the RPC call returns) to an address in the wallet.\n",
                 {
-                    {"nblocks", RPCArg::Type::NUM, false},
-                    {"maxtries", RPCArg::Type::NUM, true},
+                    {"nblocks", RPCArg::Type::NUM, /* opt */ false, /* default_val */ "", "How many blocks are generated immediately."},
+                    {"maxtries", RPCArg::Type::NUM, /* opt */ true, /* default_val */ "", "How many iterations to try (default = 1000000)."},
                 }}
                 .ToString() +
-            "\nArguments:\n"
-            "1. nblocks      (numeric, required) How many blocks are generated immediately.\n"
-            "2. maxtries     (numeric, optional) How many iterations to try (default = 1000000).\n"
             "\nResult:\n"
             "[ blockhashes ]     (array) hashes of blocks generated\n"
             "\nExamples:\n"
@@ -3525,13 +3359,10 @@ UniValue rescanblockchain(const JSONRPCRequest& request)
             RPCHelpMan{"rescanblockchain",
                 "\nRescan the local blockchain for wallet related transactions.\n",
                 {
-                    {"start_height", RPCArg::Type::NUM, true},
-                    {"stop_height", RPCArg::Type::NUM, true},
+                    {"start_height", RPCArg::Type::NUM, /* opt */ true, /* default_val */ "", "block height where the rescan should start"},
+                    {"stop_height", RPCArg::Type::NUM, /* opt */ true, /* default_val */ "", "the last block height that should be scanned"},
                 }}
                 .ToString() +
-            "\nArguments:\n"
-            "1. \"start_height\"    (numeric, optional) block height where the rescan should start\n"
-            "2. \"stop_height\"     (numeric, optional) the last block height that should be scanned\n"
             "\nResult:\n"
             "{\n"
             "  \"start_height\"     (numeric) The block height where the rescan has started. If omitted, rescan started from the genesis block.\n"
@@ -3737,11 +3568,9 @@ UniValue getaddressinfo(const JSONRPCRequest& request)
                 "\nReturn information about the given bitcoin address. Some information requires the address\n"
                 "to be in the wallet.\n",
                 {
-                    {"address", RPCArg::Type::STR, false},
+                    {"address", RPCArg::Type::STR, /* opt */ false, /* default_val */ "", "The bitcoin address to get the information of."},
                 }}
                 .ToString() +
-            "\nArguments:\n"
-            "1. \"address\"                    (string, required) The bitcoin address to get the information of.\n"
             "\nResult:\n"
             "{\n"
             "  \"address\" : \"address\",        (string) The bitcoin address validated\n"
@@ -3860,11 +3689,9 @@ static UniValue getaddressesbylabel(const JSONRPCRequest& request)
             RPCHelpMan{"getaddressesbylabel",
                 "\nReturns the list of addresses assigned the specified label.\n",
                 {
-                    {"label", RPCArg::Type::STR, false},
+                    {"label", RPCArg::Type::STR, /* opt */ false, /* default_val */ "", "The label."},
                 }}
                 .ToString() +
-            "\nArguments:\n"
-            "1. \"label\"  (string, required) The label.\n"
             "\nResult:\n"
             "{ (json object with addresses as keys)\n"
             "  \"address\": { (json object with information about address)\n"
@@ -3909,11 +3736,9 @@ static UniValue listlabels(const JSONRPCRequest& request)
             RPCHelpMan{"listlabels",
                 "\nReturns the list of all labels, or labels that are assigned to addresses with a specific purpose.\n",
                 {
-                    {"purpose", RPCArg::Type::STR, true},
+                    {"purpose", RPCArg::Type::STR, /* opt */ true, /* default_val */ "", "Address purpose to list labels for ('send','receive'). An empty string is the same as not providing this argument."},
                 }}
                 .ToString() +
-            "\nArguments:\n"
-            "1. \"purpose\"    (string, optional) Address purpose to list labels for ('send','receive'). An empty string is the same as not providing this argument.\n"
             "\nResult:\n"
             "[               (json array of string)\n"
             "  \"label\",      (string) Label name\n"
@@ -3967,20 +3792,17 @@ UniValue sethdseed(const JSONRPCRequest& request)
             RPCHelpMan{"sethdseed",
                 "\nSet or generate a new HD wallet seed. Non-HD wallets will not be upgraded to being a HD wallet. Wallets that are already\n"
                 "HD will have a new HD seed set so that new keys added to the keypool will be derived from this new seed.\n"
-                "\nNote that you will need to MAKE A NEW BACKUP of your wallet after setting the HD wallet seed.\n",
+                "\nNote that you will need to MAKE A NEW BACKUP of your wallet after setting the HD wallet seed." +
+                    HelpRequiringPassphrase(pwallet) + "\n",
                 {
-                    {"newkeypool", RPCArg::Type::BOOL, true},
-                    {"seed", RPCArg::Type::STR, true},
-                }}
-                .ToString()
-            + HelpRequiringPassphrase(pwallet) +
-            "\nArguments:\n"
-            "1. \"newkeypool\"         (boolean, optional, default=true) Whether to flush old unused addresses, including change addresses, from the keypool and regenerate it.\n"
+                    {"newkeypool", RPCArg::Type::BOOL, /* opt */ true, /* default_val */ "true", "Whether to flush old unused addresses, including change addresses, from the keypool and regenerate it.\n"
             "                             If true, the next address from getnewaddress and change address from getrawchangeaddress will be from this new seed.\n"
             "                             If false, addresses (including change addresses if the wallet already had HD Chain Split enabled) from the existing\n"
-            "                             keypool will be used until it has been depleted.\n"
-            "2. \"seed\"               (string, optional) The WIF private key to use as the new HD seed; if not provided a random seed will be used.\n"
-            "                             The seed value can be retrieved using the dumpwallet command. It is the private key marked hdseed=1\n"
+            "                             keypool will be used until it has been depleted."},
+                    {"seed", RPCArg::Type::STR, /* opt */ true, /* default_val */ "", "The WIF private key to use as the new HD seed; if not provided a random seed will be used.\n"
+            "                             The seed value can be retrieved using the dumpwallet command. It is the private key marked hdseed=1"},
+                }}
+                .ToString() +
             "\nExamples:\n"
             + HelpExampleCli("sethdseed", "")
             + HelpExampleCli("sethdseed", "false")
@@ -4110,28 +3932,21 @@ UniValue walletprocesspsbt(const JSONRPCRequest& request)
         throw std::runtime_error(
             RPCHelpMan{"walletprocesspsbt",
                 "\nUpdate a PSBT with input information from our wallet and then sign inputs\n"
-                "that we can sign for.\n",
+                "that we can sign for." +
+                    HelpRequiringPassphrase(pwallet) + "\n",
                 {
-                    {"psbt", RPCArg::Type::STR, false},
-                    {"sign", RPCArg::Type::BOOL, true},
-                    {"sighashtype", RPCArg::Type::STR, true},
-                    {"bip32derivs", RPCArg::Type::BOOL, true},
-                }}
-                .ToString() +
-            HelpRequiringPassphrase(pwallet) + "\n"
-
-            "\nArguments:\n"
-            "1. \"psbt\"                      (string, required) The transaction base64 string\n"
-            "2. sign                          (boolean, optional, default=true) Also sign the transaction when updating\n"
-            "3. \"sighashtype\"            (string, optional, default=ALL) The signature hash type to sign with if not specified by the PSBT. Must be one of\n"
+                    {"psbt", RPCArg::Type::STR, /* opt */ false, /* default_val */ "", "The transaction base64 string"},
+                    {"sign", RPCArg::Type::BOOL, /* opt */ true, /* default_val */ "true", "Also sign the transaction when updating"},
+                    {"sighashtype", RPCArg::Type::STR, /* opt */ true, /* default_val */ "ALL", "The signature hash type to sign with if not specified by the PSBT. Must be one of\n"
             "       \"ALL\"\n"
             "       \"NONE\"\n"
             "       \"SINGLE\"\n"
             "       \"ALL|ANYONECANPAY\"\n"
             "       \"NONE|ANYONECANPAY\"\n"
-            "       \"SINGLE|ANYONECANPAY\"\n"
-            "4. bip32derivs                    (boolean, optional, default=false) If true, includes the BIP 32 derivation paths for public keys if we know them\n"
-
+            "       \"SINGLE|ANYONECANPAY\""},
+                    {"bip32derivs", RPCArg::Type::BOOL, /* opt */ true, /* default_val */ "false", "If true, includes the BIP 32 derivation paths for public keys if we know them"},
+                }}
+                .ToString() +
             "\nResult:\n"
             "{\n"
             "  \"psbt\" : \"value\",          (string) The base64-encoded partially signed transaction\n"
@@ -4184,99 +3999,64 @@ UniValue walletcreatefundedpsbt(const JSONRPCRequest& request)
                 "\nCreates and funds a transaction in the Partially Signed Transaction format. Inputs will be added if supplied inputs are not enough\n"
                 "Implements the Creator and Updater roles.\n",
                 {
-                    {"inputs", RPCArg::Type::ARR,
+                    {"inputs", RPCArg::Type::ARR, /* opt */ false, /* default_val */ "", "A json array of json objects",
                         {
-                            {"", RPCArg::Type::OBJ,
+                            {"", RPCArg::Type::OBJ, /* opt */ false, /* default_val */ "", "",
                                 {
-                                    {"txid", RPCArg::Type::STR_HEX, false},
-                                    {"vout", RPCArg::Type::NUM, false},
-                                    {"sequence", RPCArg::Type::NUM, false},
+                                    {"txid", RPCArg::Type::STR_HEX, /* opt */ false, /* default_val */ "", "The transaction id"},
+                                    {"vout", RPCArg::Type::NUM, /* opt */ false, /* default_val */ "", "The output number"},
+                                    {"sequence", RPCArg::Type::NUM, /* opt */ false, /* default_val */ "", "The sequence number"},
                                 },
-                                false},
+                            },
+                        },
                         },
-                        false},
-                    {"outputs", RPCArg::Type::ARR,
+                    {"outputs", RPCArg::Type::ARR, /* opt */ false, /* default_val */ "", "a json array with outputs (key-value pairs).\n"
+                            "For compatibility reasons, a dictionary, which holds the key-value pairs directly, is also\n"
+                            "                             accepted as second parameter.",
                         {
-                            {"", RPCArg::Type::OBJ,
+                            {"", RPCArg::Type::OBJ, /* opt */ true, /* default_val */ "", "",
                                 {
-                                    {"address", RPCArg::Type::AMOUNT, true},
+                                    {"address", RPCArg::Type::AMOUNT, /* opt */ true, /* default_val */ "", "A key-value pair. The key (string) is the bitcoin address, the value (float or string) is the amount in " + CURRENCY_UNIT + ""},
                                 },
-                                true},
-                            {"", RPCArg::Type::OBJ,
-                                {
-                                    {"data", RPCArg::Type::STR_HEX, true},
                                 },
-                                true},
-                        },
-                        false},
-                    {"locktime", RPCArg::Type::NUM, true},
-                    {"options", RPCArg::Type::OBJ,
-                        {
-                            {"changeAddress", RPCArg::Type::STR_HEX, true},
-                            {"changePosition", RPCArg::Type::NUM, true},
-                            {"change_type", RPCArg::Type::STR, true},
-                            {"includeWatching", RPCArg::Type::BOOL, true},
-                            {"lockUnspents", RPCArg::Type::BOOL, true},
-                            {"feeRate", RPCArg::Type::AMOUNT, true},
-                            {"subtractFeeFromOutputs", RPCArg::Type::ARR,
+                            {"", RPCArg::Type::OBJ, /* opt */ true, /* default_val */ "", "",
                                 {
-                                    {"int", RPCArg::Type::NUM, true},
+                                    {"data", RPCArg::Type::STR_HEX, /* opt */ true, /* default_val */ "", "A key-value pair. The key must be \"data\", the value is hex-encoded data"},
                                 },
-                                true},
-                            {"replaceable", RPCArg::Type::BOOL, true},
-                            {"conf_target", RPCArg::Type::NUM, true},
-                            {"estimate_mode", RPCArg::Type::STR, true},
+                            },
                         },
-                        true, "options"},
-                    {"bip32derivs", RPCArg::Type::BOOL, true},
-                }}
-                .ToString() +
-                            "\nArguments:\n"
-                            "1. \"inputs\"                (array, required) A json array of json objects\n"
-                            "     [\n"
-                            "       {\n"
-                            "         \"txid\":\"id\",      (string, required) The transaction id\n"
-                            "         \"vout\":n,         (numeric, required) The output number\n"
-                            "         \"sequence\":n      (numeric, optional) The sequence number\n"
-                            "       } \n"
-                            "       ,...\n"
-                            "     ]\n"
-                            "2. \"outputs\"               (array, required) a json array with outputs (key-value pairs)\n"
-                            "   [\n"
-                            "    {\n"
-                            "      \"address\": x.xxx,    (obj, optional) A key-value pair. The key (string) is the bitcoin address, the value (float or string) is the amount in " + CURRENCY_UNIT + "\n"
-                            "    },\n"
-                            "    {\n"
-                            "      \"data\": \"hex\"        (obj, optional) A key-value pair. The key must be \"data\", the value is hex-encoded data\n"
-                            "    }\n"
-                            "    ,...                     More key-value pairs of the above form. For compatibility reasons, a dictionary, which holds the key-value pairs directly, is also\n"
-                            "                             accepted as second parameter.\n"
-                            "   ]\n"
-                            "3. locktime                  (numeric, optional, default=0) Raw locktime. Non-0 value also locktime-activates inputs\n"
-                            "                             Allows this transaction to be replaced by a transaction with higher fees. If provided, it is an error if explicit sequence numbers are incompatible.\n"
-                            "4. options                 (object, optional)\n"
-                            "   {\n"
-                            "     \"changeAddress\"          (string, optional, default pool address) The bitcoin address to receive the change\n"
-                            "     \"changePosition\"         (numeric, optional, default random) The index of the change output\n"
-                            "     \"change_type\"            (string, optional) The output type to use. Only valid if changeAddress is not specified. Options are \"legacy\", \"p2sh-segwit\", and \"bech32\". Default is set by -changetype.\n"
-                            "     \"includeWatching\"        (boolean, optional, default false) Also select inputs which are watch only\n"
-                            "     \"lockUnspents\"           (boolean, optional, default false) Lock selected unspent outputs\n"
-                            "     \"feeRate\"                (numeric, optional, default not set: makes wallet determine the fee) Set a specific fee rate in " + CURRENCY_UNIT + "/kB\n"
-                            "     \"subtractFeeFromOutputs\" (array, optional) A json array of integers.\n"
+                    },
+                    {"locktime", RPCArg::Type::NUM, /* opt */ true, /* default_val */ "0", "Raw locktime. Non-0 value also locktime-activates inputs\n"
+                            "                             Allows this transaction to be replaced by a transaction with higher fees. If provided, it is an error if explicit sequence numbers are incompatible."},
+                    {"options", RPCArg::Type::OBJ, /* opt */ true, /* default_val */ "", "",
+                        {
+                            {"changeAddress", RPCArg::Type::STR_HEX, /* opt */ true, /* default_val */ "pool address", "The bitcoin address to receive the change"},
+                            {"changePosition", RPCArg::Type::NUM, /* opt */ true, /* default_val */ "random", "The index of the change output"},
+                            {"change_type", RPCArg::Type::STR, /* opt */ true, /* default_val */ "", "The output type to use. Only valid if changeAddress is not specified. Options are \"legacy\", \"p2sh-segwit\", and \"bech32\". Default is set by -changetype."},
+                            {"includeWatching", RPCArg::Type::BOOL, /* opt */ true, /* default_val */ "false", "Also select inputs which are watch only"},
+                            {"lockUnspents", RPCArg::Type::BOOL, /* opt */ true, /* default_val */ "false", "Lock selected unspent outputs"},
+                            {"feeRate", RPCArg::Type::AMOUNT, /* opt */ true, /* default_val */ "not set: makes wallet determine the fee", "Set a specific fee rate in " + CURRENCY_UNIT + "/kB"},
+                            {"subtractFeeFromOutputs", RPCArg::Type::ARR, /* opt */ true, /* default_val */ "", "A json array of integers.\n"
                             "                              The fee will be equally deducted from the amount of each specified output.\n"
                             "                              The outputs are specified by their zero-based index, before any change output is added.\n"
                             "                              Those recipients will receive less bitcoins than you enter in their corresponding amount field.\n"
-                            "                              If no outputs are specified here, the sender pays the fee.\n"
-                            "                                  [vout_index,...]\n"
-                            "     \"replaceable\"            (boolean, optional) Marks this transaction as BIP125 replaceable.\n"
-                            "                              Allows this transaction to be replaced by a transaction with higher fees\n"
-                            "     \"conf_target\"            (numeric, optional) Confirmation target (in blocks)\n"
-                            "     \"estimate_mode\"          (string, optional, default=UNSET) The fee estimate mode, must be one of:\n"
+                            "                              If no outputs are specified here, the sender pays the fee.",
+                                {
+                                    {"vout_index", RPCArg::Type::NUM, /* opt */ true, /* default_val */ "", ""},
+                                },
+                            },
+                            {"replaceable", RPCArg::Type::BOOL, /* opt */ true, /* default_val */ "", "Marks this transaction as BIP125 replaceable.\n"
+                            "                              Allows this transaction to be replaced by a transaction with higher fees"},
+                            {"conf_target", RPCArg::Type::NUM, /* opt */ true, /* default_val */ "", "Confirmation target (in blocks)"},
+                            {"estimate_mode", RPCArg::Type::STR, /* opt */ true, /* default_val */ "UNSET", "The fee estimate mode, must be one of:\n"
                             "         \"UNSET\"\n"
                             "         \"ECONOMICAL\"\n"
-                            "         \"CONSERVATIVE\"\n"
-                            "   }\n"
-                            "5. bip32derivs                    (boolean, optional, default=false) If true, includes the BIP 32 derivation paths for public keys if we know them\n"
+                            "         \"CONSERVATIVE\""},
+                        },
+                        "options"},
+                    {"bip32derivs", RPCArg::Type::BOOL, /* opt */ true, /* default_val */ "false", "If true, includes the BIP 32 derivation paths for public keys if we know them"},
+                }}
+                .ToString() +
                             "\nResult:\n"
                             "{\n"
                             "  \"psbt\": \"value\",        (string)  The resulting raw transaction (base64-encoded string)\n"