From fa87eb8ce184a2f0d0ae2d19751b4f6b47af2349 Mon Sep 17 00:00:00 2001
From: MacroFake <falke.marco@gmail.com>
Date: Tue, 3 May 2022 08:30:16 +0200
Subject: rpc: Move output script RPCs to separate file

Can be reviewed with --color-moved=dimmed-zebra --color-moved-ws=ignore-all-space
---
 src/Makefile.am           |   1 +
 src/rpc/misc.cpp          | 285 +----------------------------------------
 src/rpc/output_script.cpp | 319 ++++++++++++++++++++++++++++++++++++++++++++++
 src/rpc/register.h        |  10 +-
 4 files changed, 327 insertions(+), 288 deletions(-)
 create mode 100644 src/rpc/output_script.cpp

diff --git a/src/Makefile.am b/src/Makefile.am
index a5d8635c06..4d97579d7b 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -384,6 +384,7 @@ libbitcoin_node_a_SOURCES = \
   rpc/mining.cpp \
   rpc/misc.cpp \
   rpc/net.cpp \
+  rpc/output_script.cpp \
   rpc/rawtransaction.cpp \
   rpc/server.cpp \
   rpc/server_util.cpp \
diff --git a/src/rpc/misc.cpp b/src/rpc/misc.cpp
index 7525b859ee..ceeebe8483 100644
--- a/src/rpc/misc.cpp
+++ b/src/rpc/misc.cpp
@@ -3,6 +3,7 @@
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
+#include <chainparams.h>
 #include <httpserver.h>
 #include <index/blockfilterindex.h>
 #include <index/coinstatsindex.h>
@@ -11,303 +12,23 @@
 #include <interfaces/echo.h>
 #include <interfaces/init.h>
 #include <interfaces/ipc.h>
-#include <key_io.h>
 #include <node/context.h>
-#include <outputtype.h>
 #include <rpc/server.h>
 #include <rpc/server_util.h>
 #include <rpc/util.h>
 #include <scheduler.h>
-#include <script/descriptor.h>
 #include <univalue.h>
 #include <util/check.h>
-#include <util/strencodings.h>
 #include <util/syscall_sandbox.h>
 #include <util/system.h>
 
-#include <optional>
 #include <stdint.h>
-#include <tuple>
 #ifdef HAVE_MALLOC_INFO
 #include <malloc.h>
 #endif
 
 using node::NodeContext;
 
-static RPCHelpMan validateaddress()
-{
-    return RPCHelpMan{
-        "validateaddress",
-        "\nReturn information about the given bitcoin address.\n",
-        {
-            {"address", RPCArg::Type::STR, RPCArg::Optional::NO, "The bitcoin address to validate"},
-        },
-        RPCResult{
-            RPCResult::Type::OBJ, "", "",
-            {
-                {RPCResult::Type::BOOL, "isvalid", "If the address is valid or not"},
-                {RPCResult::Type::STR, "address", /*optional=*/true, "The bitcoin address validated"},
-                {RPCResult::Type::STR_HEX, "scriptPubKey", /*optional=*/true, "The hex-encoded scriptPubKey generated by the address"},
-                {RPCResult::Type::BOOL, "isscript", /*optional=*/true, "If the key is a script"},
-                {RPCResult::Type::BOOL, "iswitness", /*optional=*/true, "If the address is a witness address"},
-                {RPCResult::Type::NUM, "witness_version", /*optional=*/true, "The version number of the witness program"},
-                {RPCResult::Type::STR_HEX, "witness_program", /*optional=*/true, "The hex value of the witness program"},
-                {RPCResult::Type::STR, "error", /*optional=*/true, "Error message, if any"},
-                {RPCResult::Type::ARR, "error_locations", /*optional=*/true, "Indices of likely error locations in address, if known (e.g. Bech32 errors)",
-                    {
-                        {RPCResult::Type::NUM, "index", "index of a potential error"},
-                    }},
-            }
-        },
-        RPCExamples{
-            HelpExampleCli("validateaddress", "\"" + EXAMPLE_ADDRESS[0] + "\"") +
-            HelpExampleRpc("validateaddress", "\"" + EXAMPLE_ADDRESS[0] + "\"")
-        },
-        [&](const RPCHelpMan& self, const JSONRPCRequest& request) -> UniValue
-{
-    std::string error_msg;
-    std::vector<int> error_locations;
-    CTxDestination dest = DecodeDestination(request.params[0].get_str(), error_msg, &error_locations);
-    const bool isValid = IsValidDestination(dest);
-    CHECK_NONFATAL(isValid == error_msg.empty());
-
-    UniValue ret(UniValue::VOBJ);
-    ret.pushKV("isvalid", isValid);
-    if (isValid) {
-        std::string currentAddress = EncodeDestination(dest);
-        ret.pushKV("address", currentAddress);
-
-        CScript scriptPubKey = GetScriptForDestination(dest);
-        ret.pushKV("scriptPubKey", HexStr(scriptPubKey));
-
-        UniValue detail = DescribeAddress(dest);
-        ret.pushKVs(detail);
-    } else {
-        UniValue error_indices(UniValue::VARR);
-        for (int i : error_locations) error_indices.push_back(i);
-        ret.pushKV("error_locations", error_indices);
-        ret.pushKV("error", error_msg);
-    }
-
-    return ret;
-},
-    };
-}
-
-static RPCHelpMan createmultisig()
-{
-    return RPCHelpMan{"createmultisig",
-                "\nCreates a multi-signature address with n signature of m keys required.\n"
-                "It returns a json object with the address and redeemScript.\n",
-                {
-                    {"nrequired", RPCArg::Type::NUM, RPCArg::Optional::NO, "The number of required signatures out of the n keys."},
-                    {"keys", RPCArg::Type::ARR, RPCArg::Optional::NO, "The hex-encoded public keys.",
-                        {
-                            {"key", RPCArg::Type::STR_HEX, RPCArg::Optional::OMITTED, "The hex-encoded public key"},
-                        }},
-                    {"address_type", RPCArg::Type::STR, RPCArg::Default{"legacy"}, "The address type to use. Options are \"legacy\", \"p2sh-segwit\", and \"bech32\"."},
-                },
-                RPCResult{
-                    RPCResult::Type::OBJ, "", "",
-                    {
-                        {RPCResult::Type::STR, "address", "The value of the new multisig address."},
-                        {RPCResult::Type::STR_HEX, "redeemScript", "The string value of the hex-encoded redemption script."},
-                        {RPCResult::Type::STR, "descriptor", "The descriptor for this multisig"},
-                        {RPCResult::Type::ARR, "warnings", /*optional=*/true, "Any warnings resulting from the creation of this multisig",
-                        {
-                            {RPCResult::Type::STR, "", ""},
-                        }},
-                    }
-                },
-                RPCExamples{
-            "\nCreate a multisig address from 2 public keys\n"
-            + HelpExampleCli("createmultisig", "2 \"[\\\"03789ed0bb717d88f7d321a368d905e7430207ebbd82bd342cf11ae157a7ace5fd\\\",\\\"03dbc6764b8884a92e871274b87583e6d5c2a58819473e17e107ef3f6aa5a61626\\\"]\"") +
-            "\nAs a JSON-RPC call\n"
-            + HelpExampleRpc("createmultisig", "2, [\"03789ed0bb717d88f7d321a368d905e7430207ebbd82bd342cf11ae157a7ace5fd\",\"03dbc6764b8884a92e871274b87583e6d5c2a58819473e17e107ef3f6aa5a61626\"]")
-                },
-        [&](const RPCHelpMan& self, const JSONRPCRequest& request) -> UniValue
-{
-    int required = request.params[0].get_int();
-
-    // Get the public keys
-    const UniValue& keys = request.params[1].get_array();
-    std::vector<CPubKey> pubkeys;
-    for (unsigned int i = 0; i < keys.size(); ++i) {
-        if (IsHex(keys[i].get_str()) && (keys[i].get_str().length() == 66 || keys[i].get_str().length() == 130)) {
-            pubkeys.push_back(HexToPubKey(keys[i].get_str()));
-        } else {
-            throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, strprintf("Invalid public key: %s\n.", keys[i].get_str()));
-        }
-    }
-
-    // Get the output type
-    OutputType output_type = OutputType::LEGACY;
-    if (!request.params[2].isNull()) {
-        std::optional<OutputType> parsed = ParseOutputType(request.params[2].get_str());
-        if (!parsed) {
-            throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, strprintf("Unknown address type '%s'", request.params[2].get_str()));
-        } else if (parsed.value() == OutputType::BECH32M) {
-            throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "createmultisig cannot create bech32m multisig addresses");
-        }
-        output_type = parsed.value();
-    }
-
-    // Construct using pay-to-script-hash:
-    FillableSigningProvider keystore;
-    CScript inner;
-    const CTxDestination dest = AddAndGetMultisigDestination(required, pubkeys, output_type, keystore, inner);
-
-    // Make the descriptor
-    std::unique_ptr<Descriptor> descriptor = InferDescriptor(GetScriptForDestination(dest), keystore);
-
-    UniValue result(UniValue::VOBJ);
-    result.pushKV("address", EncodeDestination(dest));
-    result.pushKV("redeemScript", HexStr(inner));
-    result.pushKV("descriptor", descriptor->ToString());
-
-    UniValue warnings(UniValue::VARR);
-    if (!request.params[2].isNull() && OutputTypeFromDestination(dest) != output_type) {
-        // Only warns if the user has explicitly chosen an address type we cannot generate
-        warnings.push_back("Unable to make chosen address type, please ensure no uncompressed public keys are present.");
-    }
-    if (warnings.size()) result.pushKV("warnings", warnings);
-
-    return result;
-},
-    };
-}
-
-static RPCHelpMan getdescriptorinfo()
-{
-    const std::string EXAMPLE_DESCRIPTOR = "wpkh([d34db33f/84h/0h/0h]0279be667ef9dcbbac55a06295Ce870b07029Bfcdb2dce28d959f2815b16f81798)";
-
-    return RPCHelpMan{"getdescriptorinfo",
-            {"\nAnalyses a descriptor.\n"},
-            {
-                {"descriptor", RPCArg::Type::STR, RPCArg::Optional::NO, "The descriptor."},
-            },
-            RPCResult{
-                RPCResult::Type::OBJ, "", "",
-                {
-                    {RPCResult::Type::STR, "descriptor", "The descriptor in canonical form, without private keys"},
-                    {RPCResult::Type::STR, "checksum", "The checksum for the input descriptor"},
-                    {RPCResult::Type::BOOL, "isrange", "Whether the descriptor is ranged"},
-                    {RPCResult::Type::BOOL, "issolvable", "Whether the descriptor is solvable"},
-                    {RPCResult::Type::BOOL, "hasprivatekeys", "Whether the input descriptor contained at least one private key"},
-                }
-            },
-            RPCExamples{
-                "Analyse a descriptor\n" +
-                HelpExampleCli("getdescriptorinfo", "\"" + EXAMPLE_DESCRIPTOR + "\"") +
-                HelpExampleRpc("getdescriptorinfo", "\"" + EXAMPLE_DESCRIPTOR + "\"")
-            },
-        [&](const RPCHelpMan& self, const JSONRPCRequest& request) -> UniValue
-{
-    RPCTypeCheck(request.params, {UniValue::VSTR});
-
-    FlatSigningProvider provider;
-    std::string error;
-    auto desc = Parse(request.params[0].get_str(), provider, error);
-    if (!desc) {
-        throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, error);
-    }
-
-    UniValue result(UniValue::VOBJ);
-    result.pushKV("descriptor", desc->ToString());
-    result.pushKV("checksum", GetDescriptorChecksum(request.params[0].get_str()));
-    result.pushKV("isrange", desc->IsRange());
-    result.pushKV("issolvable", desc->IsSolvable());
-    result.pushKV("hasprivatekeys", provider.keys.size() > 0);
-    return result;
-},
-    };
-}
-
-static RPCHelpMan deriveaddresses()
-{
-    const std::string EXAMPLE_DESCRIPTOR = "wpkh([d34db33f/84h/0h/0h]xpub6DJ2dNUysrn5Vt36jH2KLBT2i1auw1tTSSomg8PhqNiUtx8QX2SvC9nrHu81fT41fvDUnhMjEzQgXnQjKEu3oaqMSzhSrHMxyyoEAmUHQbY/0/*)#cjjspncu";
-
-    return RPCHelpMan{"deriveaddresses",
-            {"\nDerives one or more addresses corresponding to an output descriptor.\n"
-            "Examples of output descriptors are:\n"
-            "    pkh(<pubkey>)                        P2PKH outputs for the given pubkey\n"
-            "    wpkh(<pubkey>)                       Native segwit P2PKH outputs for the given pubkey\n"
-            "    sh(multi(<n>,<pubkey>,<pubkey>,...)) P2SH-multisig outputs for the given threshold and pubkeys\n"
-            "    raw(<hex script>)                    Outputs whose scriptPubKey equals the specified hex scripts\n"
-            "\nIn the above, <pubkey> either refers to a fixed public key in hexadecimal notation, or to an xpub/xprv optionally followed by one\n"
-            "or more path elements separated by \"/\", where \"h\" represents a hardened child key.\n"
-            "For more information on output descriptors, see the documentation in the doc/descriptors.md file.\n"},
-            {
-                {"descriptor", RPCArg::Type::STR, RPCArg::Optional::NO, "The descriptor."},
-                {"range", RPCArg::Type::RANGE, RPCArg::Optional::OMITTED_NAMED_ARG, "If a ranged descriptor is used, this specifies the end or the range (in [begin,end] notation) to derive."},
-            },
-            RPCResult{
-                RPCResult::Type::ARR, "", "",
-                {
-                    {RPCResult::Type::STR, "address", "the derived addresses"},
-                }
-            },
-            RPCExamples{
-                "First three native segwit receive addresses\n" +
-                HelpExampleCli("deriveaddresses", "\"" + EXAMPLE_DESCRIPTOR + "\" \"[0,2]\"") +
-                HelpExampleRpc("deriveaddresses", "\"" + EXAMPLE_DESCRIPTOR + "\", \"[0,2]\"")
-            },
-        [&](const RPCHelpMan& self, const JSONRPCRequest& request) -> UniValue
-{
-    RPCTypeCheck(request.params, {UniValue::VSTR, UniValueType()}); // Range argument is checked later
-    const std::string desc_str = request.params[0].get_str();
-
-    int64_t range_begin = 0;
-    int64_t range_end = 0;
-
-    if (request.params.size() >= 2 && !request.params[1].isNull()) {
-        std::tie(range_begin, range_end) = ParseDescriptorRange(request.params[1]);
-    }
-
-    FlatSigningProvider key_provider;
-    std::string error;
-    auto desc = Parse(desc_str, key_provider, error, /* require_checksum = */ true);
-    if (!desc) {
-        throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, error);
-    }
-
-    if (!desc->IsRange() && request.params.size() > 1) {
-        throw JSONRPCError(RPC_INVALID_PARAMETER, "Range should not be specified for an un-ranged descriptor");
-    }
-
-    if (desc->IsRange() && request.params.size() == 1) {
-        throw JSONRPCError(RPC_INVALID_PARAMETER, "Range must be specified for a ranged descriptor");
-    }
-
-    UniValue addresses(UniValue::VARR);
-
-    for (int i = range_begin; i <= range_end; ++i) {
-        FlatSigningProvider provider;
-        std::vector<CScript> scripts;
-        if (!desc->Expand(i, key_provider, scripts, provider)) {
-            throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Cannot derive script without private keys");
-        }
-
-        for (const CScript &script : scripts) {
-            CTxDestination dest;
-            if (!ExtractDestination(script, dest)) {
-                throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Descriptor does not have a corresponding address");
-            }
-
-            addresses.push_back(EncodeDestination(dest));
-        }
-    }
-
-    // This should not be possible, but an assert seems overkill:
-    if (addresses.empty()) {
-        throw JSONRPCError(RPC_MISC_ERROR, "Unexpected empty result");
-    }
-
-    return addresses;
-},
-    };
-}
-
 static RPCHelpMan setmocktime()
 {
     return RPCHelpMan{"setmocktime",
@@ -703,10 +424,6 @@ void RegisterMiscRPCCommands(CRPCTable& t)
     static const CRPCCommand commands[]{
         {"control", &getmemoryinfo},
         {"control", &logging},
-        {"util", &validateaddress},
-        {"util", &createmultisig},
-        {"util", &deriveaddresses},
-        {"util", &getdescriptorinfo},
         {"util", &getindexinfo},
         {"hidden", &setmocktime},
         {"hidden", &mockscheduler},
diff --git a/src/rpc/output_script.cpp b/src/rpc/output_script.cpp
new file mode 100644
index 0000000000..1cf952d0c8
--- /dev/null
+++ b/src/rpc/output_script.cpp
@@ -0,0 +1,319 @@
+// Copyright (c) 2010 Satoshi Nakamoto
+// Copyright (c) 2009-2022 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <key_io.h>
+#include <outputtype.h>
+#include <pubkey.h>
+#include <rpc/protocol.h>
+#include <rpc/request.h>
+#include <rpc/server.h>
+#include <rpc/util.h>
+#include <script/descriptor.h>
+#include <script/script.h>
+#include <script/signingprovider.h>
+#include <script/standard.h>
+#include <tinyformat.h>
+#include <univalue.h>
+#include <util/check.h>
+#include <util/strencodings.h>
+
+#include <cstdint>
+#include <memory>
+#include <optional>
+#include <string>
+#include <tuple>
+#include <vector>
+
+namespace node {
+struct NodeContext;
+}
+using node::NodeContext;
+
+static RPCHelpMan validateaddress()
+{
+    return RPCHelpMan{
+        "validateaddress",
+        "\nReturn information about the given bitcoin address.\n",
+        {
+            {"address", RPCArg::Type::STR, RPCArg::Optional::NO, "The bitcoin address to validate"},
+        },
+        RPCResult{
+            RPCResult::Type::OBJ, "", "",
+            {
+                {RPCResult::Type::BOOL, "isvalid", "If the address is valid or not"},
+                {RPCResult::Type::STR, "address", /*optional=*/true, "The bitcoin address validated"},
+                {RPCResult::Type::STR_HEX, "scriptPubKey", /*optional=*/true, "The hex-encoded scriptPubKey generated by the address"},
+                {RPCResult::Type::BOOL, "isscript", /*optional=*/true, "If the key is a script"},
+                {RPCResult::Type::BOOL, "iswitness", /*optional=*/true, "If the address is a witness address"},
+                {RPCResult::Type::NUM, "witness_version", /*optional=*/true, "The version number of the witness program"},
+                {RPCResult::Type::STR_HEX, "witness_program", /*optional=*/true, "The hex value of the witness program"},
+                {RPCResult::Type::STR, "error", /*optional=*/true, "Error message, if any"},
+                {RPCResult::Type::ARR, "error_locations", /*optional=*/true, "Indices of likely error locations in address, if known (e.g. Bech32 errors)",
+                    {
+                        {RPCResult::Type::NUM, "index", "index of a potential error"},
+                    }},
+            }
+        },
+        RPCExamples{
+            HelpExampleCli("validateaddress", "\"" + EXAMPLE_ADDRESS[0] + "\"") +
+            HelpExampleRpc("validateaddress", "\"" + EXAMPLE_ADDRESS[0] + "\"")
+        },
+        [&](const RPCHelpMan& self, const JSONRPCRequest& request) -> UniValue
+        {
+            std::string error_msg;
+            std::vector<int> error_locations;
+            CTxDestination dest = DecodeDestination(request.params[0].get_str(), error_msg, &error_locations);
+            const bool isValid = IsValidDestination(dest);
+            CHECK_NONFATAL(isValid == error_msg.empty());
+
+            UniValue ret(UniValue::VOBJ);
+            ret.pushKV("isvalid", isValid);
+            if (isValid) {
+                std::string currentAddress = EncodeDestination(dest);
+                ret.pushKV("address", currentAddress);
+
+                CScript scriptPubKey = GetScriptForDestination(dest);
+                ret.pushKV("scriptPubKey", HexStr(scriptPubKey));
+
+                UniValue detail = DescribeAddress(dest);
+                ret.pushKVs(detail);
+            } else {
+                UniValue error_indices(UniValue::VARR);
+                for (int i : error_locations) error_indices.push_back(i);
+                ret.pushKV("error_locations", error_indices);
+                ret.pushKV("error", error_msg);
+            }
+
+            return ret;
+        },
+    };
+}
+
+static RPCHelpMan createmultisig()
+{
+    return RPCHelpMan{"createmultisig",
+        "\nCreates a multi-signature address with n signature of m keys required.\n"
+        "It returns a json object with the address and redeemScript.\n",
+        {
+            {"nrequired", RPCArg::Type::NUM, RPCArg::Optional::NO, "The number of required signatures out of the n keys."},
+            {"keys", RPCArg::Type::ARR, RPCArg::Optional::NO, "The hex-encoded public keys.",
+                {
+                    {"key", RPCArg::Type::STR_HEX, RPCArg::Optional::OMITTED, "The hex-encoded public key"},
+                }},
+            {"address_type", RPCArg::Type::STR, RPCArg::Default{"legacy"}, "The address type to use. Options are \"legacy\", \"p2sh-segwit\", and \"bech32\"."},
+        },
+        RPCResult{
+            RPCResult::Type::OBJ, "", "",
+            {
+                {RPCResult::Type::STR, "address", "The value of the new multisig address."},
+                {RPCResult::Type::STR_HEX, "redeemScript", "The string value of the hex-encoded redemption script."},
+                {RPCResult::Type::STR, "descriptor", "The descriptor for this multisig"},
+                {RPCResult::Type::ARR, "warnings", /*optional=*/true, "Any warnings resulting from the creation of this multisig",
+                {
+                    {RPCResult::Type::STR, "", ""},
+                }},
+            }
+        },
+        RPCExamples{
+            "\nCreate a multisig address from 2 public keys\n"
+            + HelpExampleCli("createmultisig", "2 \"[\\\"03789ed0bb717d88f7d321a368d905e7430207ebbd82bd342cf11ae157a7ace5fd\\\",\\\"03dbc6764b8884a92e871274b87583e6d5c2a58819473e17e107ef3f6aa5a61626\\\"]\"") +
+            "\nAs a JSON-RPC call\n"
+            + HelpExampleRpc("createmultisig", "2, [\"03789ed0bb717d88f7d321a368d905e7430207ebbd82bd342cf11ae157a7ace5fd\",\"03dbc6764b8884a92e871274b87583e6d5c2a58819473e17e107ef3f6aa5a61626\"]")
+                },
+        [&](const RPCHelpMan& self, const JSONRPCRequest& request) -> UniValue
+        {
+            int required = request.params[0].get_int();
+
+            // Get the public keys
+            const UniValue& keys = request.params[1].get_array();
+            std::vector<CPubKey> pubkeys;
+            for (unsigned int i = 0; i < keys.size(); ++i) {
+                if (IsHex(keys[i].get_str()) && (keys[i].get_str().length() == 66 || keys[i].get_str().length() == 130)) {
+                    pubkeys.push_back(HexToPubKey(keys[i].get_str()));
+                } else {
+                    throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, strprintf("Invalid public key: %s\n.", keys[i].get_str()));
+                }
+            }
+
+            // Get the output type
+            OutputType output_type = OutputType::LEGACY;
+            if (!request.params[2].isNull()) {
+                std::optional<OutputType> parsed = ParseOutputType(request.params[2].get_str());
+                if (!parsed) {
+                    throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, strprintf("Unknown address type '%s'", request.params[2].get_str()));
+                } else if (parsed.value() == OutputType::BECH32M) {
+                    throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "createmultisig cannot create bech32m multisig addresses");
+                }
+                output_type = parsed.value();
+            }
+
+            // Construct using pay-to-script-hash:
+            FillableSigningProvider keystore;
+            CScript inner;
+            const CTxDestination dest = AddAndGetMultisigDestination(required, pubkeys, output_type, keystore, inner);
+
+            // Make the descriptor
+            std::unique_ptr<Descriptor> descriptor = InferDescriptor(GetScriptForDestination(dest), keystore);
+
+            UniValue result(UniValue::VOBJ);
+            result.pushKV("address", EncodeDestination(dest));
+            result.pushKV("redeemScript", HexStr(inner));
+            result.pushKV("descriptor", descriptor->ToString());
+
+            UniValue warnings(UniValue::VARR);
+            if (!request.params[2].isNull() && OutputTypeFromDestination(dest) != output_type) {
+                // Only warns if the user has explicitly chosen an address type we cannot generate
+                warnings.push_back("Unable to make chosen address type, please ensure no uncompressed public keys are present.");
+            }
+            if (warnings.size()) result.pushKV("warnings", warnings);
+
+            return result;
+        },
+    };
+}
+
+static RPCHelpMan getdescriptorinfo()
+{
+    const std::string EXAMPLE_DESCRIPTOR = "wpkh([d34db33f/84h/0h/0h]0279be667ef9dcbbac55a06295Ce870b07029Bfcdb2dce28d959f2815b16f81798)";
+
+    return RPCHelpMan{"getdescriptorinfo",
+        {"\nAnalyses a descriptor.\n"},
+        {
+            {"descriptor", RPCArg::Type::STR, RPCArg::Optional::NO, "The descriptor."},
+        },
+        RPCResult{
+            RPCResult::Type::OBJ, "", "",
+            {
+                {RPCResult::Type::STR, "descriptor", "The descriptor in canonical form, without private keys"},
+                {RPCResult::Type::STR, "checksum", "The checksum for the input descriptor"},
+                {RPCResult::Type::BOOL, "isrange", "Whether the descriptor is ranged"},
+                {RPCResult::Type::BOOL, "issolvable", "Whether the descriptor is solvable"},
+                {RPCResult::Type::BOOL, "hasprivatekeys", "Whether the input descriptor contained at least one private key"},
+            }
+        },
+        RPCExamples{
+            "Analyse a descriptor\n" +
+            HelpExampleCli("getdescriptorinfo", "\"" + EXAMPLE_DESCRIPTOR + "\"") +
+            HelpExampleRpc("getdescriptorinfo", "\"" + EXAMPLE_DESCRIPTOR + "\"")
+        },
+        [&](const RPCHelpMan& self, const JSONRPCRequest& request) -> UniValue
+        {
+            RPCTypeCheck(request.params, {UniValue::VSTR});
+
+            FlatSigningProvider provider;
+            std::string error;
+            auto desc = Parse(request.params[0].get_str(), provider, error);
+            if (!desc) {
+                throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, error);
+            }
+
+            UniValue result(UniValue::VOBJ);
+            result.pushKV("descriptor", desc->ToString());
+            result.pushKV("checksum", GetDescriptorChecksum(request.params[0].get_str()));
+            result.pushKV("isrange", desc->IsRange());
+            result.pushKV("issolvable", desc->IsSolvable());
+            result.pushKV("hasprivatekeys", provider.keys.size() > 0);
+            return result;
+        },
+    };
+}
+
+static RPCHelpMan deriveaddresses()
+{
+    const std::string EXAMPLE_DESCRIPTOR = "wpkh([d34db33f/84h/0h/0h]xpub6DJ2dNUysrn5Vt36jH2KLBT2i1auw1tTSSomg8PhqNiUtx8QX2SvC9nrHu81fT41fvDUnhMjEzQgXnQjKEu3oaqMSzhSrHMxyyoEAmUHQbY/0/*)#cjjspncu";
+
+    return RPCHelpMan{"deriveaddresses",
+        {"\nDerives one or more addresses corresponding to an output descriptor.\n"
+         "Examples of output descriptors are:\n"
+         "    pkh(<pubkey>)                        P2PKH outputs for the given pubkey\n"
+         "    wpkh(<pubkey>)                       Native segwit P2PKH outputs for the given pubkey\n"
+         "    sh(multi(<n>,<pubkey>,<pubkey>,...)) P2SH-multisig outputs for the given threshold and pubkeys\n"
+         "    raw(<hex script>)                    Outputs whose scriptPubKey equals the specified hex scripts\n"
+         "\nIn the above, <pubkey> either refers to a fixed public key in hexadecimal notation, or to an xpub/xprv optionally followed by one\n"
+         "or more path elements separated by \"/\", where \"h\" represents a hardened child key.\n"
+         "For more information on output descriptors, see the documentation in the doc/descriptors.md file.\n"},
+        {
+            {"descriptor", RPCArg::Type::STR, RPCArg::Optional::NO, "The descriptor."},
+            {"range", RPCArg::Type::RANGE, RPCArg::Optional::OMITTED_NAMED_ARG, "If a ranged descriptor is used, this specifies the end or the range (in [begin,end] notation) to derive."},
+        },
+        RPCResult{
+            RPCResult::Type::ARR, "", "",
+            {
+                {RPCResult::Type::STR, "address", "the derived addresses"},
+            }
+        },
+        RPCExamples{
+            "First three native segwit receive addresses\n" +
+            HelpExampleCli("deriveaddresses", "\"" + EXAMPLE_DESCRIPTOR + "\" \"[0,2]\"") +
+            HelpExampleRpc("deriveaddresses", "\"" + EXAMPLE_DESCRIPTOR + "\", \"[0,2]\"")
+        },
+        [&](const RPCHelpMan& self, const JSONRPCRequest& request) -> UniValue
+        {
+            RPCTypeCheck(request.params, {UniValue::VSTR, UniValueType()}); // Range argument is checked later
+            const std::string desc_str = request.params[0].get_str();
+
+            int64_t range_begin = 0;
+            int64_t range_end = 0;
+
+            if (request.params.size() >= 2 && !request.params[1].isNull()) {
+                std::tie(range_begin, range_end) = ParseDescriptorRange(request.params[1]);
+            }
+
+            FlatSigningProvider key_provider;
+            std::string error;
+            auto desc = Parse(desc_str, key_provider, error, /* require_checksum = */ true);
+            if (!desc) {
+                throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, error);
+            }
+
+            if (!desc->IsRange() && request.params.size() > 1) {
+                throw JSONRPCError(RPC_INVALID_PARAMETER, "Range should not be specified for an un-ranged descriptor");
+            }
+
+            if (desc->IsRange() && request.params.size() == 1) {
+                throw JSONRPCError(RPC_INVALID_PARAMETER, "Range must be specified for a ranged descriptor");
+            }
+
+            UniValue addresses(UniValue::VARR);
+
+            for (int i = range_begin; i <= range_end; ++i) {
+                FlatSigningProvider provider;
+                std::vector<CScript> scripts;
+                if (!desc->Expand(i, key_provider, scripts, provider)) {
+                    throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Cannot derive script without private keys");
+                }
+
+                for (const CScript& script : scripts) {
+                    CTxDestination dest;
+                    if (!ExtractDestination(script, dest)) {
+                        throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Descriptor does not have a corresponding address");
+                    }
+
+                    addresses.push_back(EncodeDestination(dest));
+                }
+            }
+
+            // This should not be possible, but an assert seems overkill:
+            if (addresses.empty()) {
+                throw JSONRPCError(RPC_MISC_ERROR, "Unexpected empty result");
+            }
+
+            return addresses;
+        },
+    };
+}
+
+void RegisterOutputScriptRPCCommands(CRPCTable& t)
+{
+    static const CRPCCommand commands[]{
+        {"util", &validateaddress},
+        {"util", &createmultisig},
+        {"util", &deriveaddresses},
+        {"util", &getdescriptorinfo},
+    };
+    for (const auto& c : commands) {
+        t.appendCommand(c.name, &c);
+    }
+}
diff --git a/src/rpc/register.h b/src/rpc/register.h
index c67d8b893d..53d8064348 100644
--- a/src/rpc/register.h
+++ b/src/rpc/register.h
@@ -12,9 +12,10 @@ class CRPCTable;
 void RegisterBlockchainRPCCommands(CRPCTable &tableRPC);
 void RegisterFeeRPCCommands(CRPCTable&);
 void RegisterMempoolRPCCommands(CRPCTable&);
-void RegisterNetRPCCommands(CRPCTable &tableRPC);
-void RegisterMiscRPCCommands(CRPCTable &tableRPC);
 void RegisterMiningRPCCommands(CRPCTable &tableRPC);
+void RegisterMiscRPCCommands(CRPCTable&);
+void RegisterNetRPCCommands(CRPCTable&);
+void RegisterOutputScriptRPCCommands(CRPCTable&);
 void RegisterRawTransactionRPCCommands(CRPCTable &tableRPC);
 void RegisterSignMessageRPCCommands(CRPCTable&);
 void RegisterSignerRPCCommands(CRPCTable &tableRPC);
@@ -25,9 +26,10 @@ static inline void RegisterAllCoreRPCCommands(CRPCTable &t)
     RegisterBlockchainRPCCommands(t);
     RegisterFeeRPCCommands(t);
     RegisterMempoolRPCCommands(t);
-    RegisterNetRPCCommands(t);
-    RegisterMiscRPCCommands(t);
     RegisterMiningRPCCommands(t);
+    RegisterMiscRPCCommands(t);
+    RegisterNetRPCCommands(t);
+    RegisterOutputScriptRPCCommands(t);
     RegisterRawTransactionRPCCommands(t);
     RegisterSignMessageRPCCommands(t);
 #ifdef ENABLE_EXTERNAL_SIGNER
-- 
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