diff --git a/src/Makefile.am b/src/Makefile.am
index d12edca64e7..9e1fab869d6 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -280,6 +280,7 @@ BITCOIN_CORE_H = \
   util/bip32.h \
   util/bitdeque.h \
   util/bytevectorhash.h \
+  util/chaintype.h \
   util/check.h \
   util/epochguard.h \
   util/error.h \
@@ -707,6 +708,7 @@ libbitcoin_util_a_SOURCES = \
   util/asmap.cpp \
   util/bip32.cpp \
   util/bytevectorhash.cpp \
+  util/chaintype.cpp \
   util/check.cpp \
   util/error.cpp \
   util/exception.cpp \
@@ -956,6 +958,7 @@ libbitcoinkernel_la_SOURCES = \
   txdb.cpp \
   txmempool.cpp \
   uint256.cpp \
+  util/chaintype.cpp \
   util/check.cpp \
   util/exception.cpp \
   util/fs.cpp \
diff --git a/src/bench/checkblock.cpp b/src/bench/checkblock.cpp
index 260c8991ce1..269ac847a57 100644
--- a/src/bench/checkblock.cpp
+++ b/src/bench/checkblock.cpp
@@ -9,6 +9,7 @@
 #include <common/args.h>
 #include <consensus/validation.h>
 #include <streams.h>
+#include <util/chaintype.h>
 #include <validation.h>
 
 // These are the two major time-sinks which happen after we have fully received
@@ -36,7 +37,7 @@ static void DeserializeAndCheckBlockTest(benchmark::Bench& bench)
     stream.write({&a, 1}); // Prevent compaction
 
     ArgsManager bench_args;
-    const auto chainParams = CreateChainParams(bench_args, CBaseChainParams::MAIN);
+    const auto chainParams = CreateChainParams(bench_args, ChainType::MAIN);
 
     bench.unit("block").run([&] {
         CBlock block; // Note that CBlock caches its checked state, so we need to recreate it here
diff --git a/src/bench/load_external.cpp b/src/bench/load_external.cpp
index 0fd842c7c36..2ff72a30121 100644
--- a/src/bench/load_external.cpp
+++ b/src/bench/load_external.cpp
@@ -6,6 +6,7 @@
 #include <bench/data.h>
 #include <chainparams.h>
 #include <test/util/setup_common.h>
+#include <util/chaintype.h>
 #include <validation.h>
 
 /**
@@ -22,7 +23,7 @@
  */
 static void LoadExternalBlockFile(benchmark::Bench& bench)
 {
-    const auto testing_setup{MakeNoLogFileContext<const TestingSetup>(CBaseChainParams::MAIN)};
+    const auto testing_setup{MakeNoLogFileContext<const TestingSetup>(ChainType::MAIN)};
 
     // Create a single block as in the blocks files (magic bytes, block size,
     // block data) as a stream object.
diff --git a/src/bench/logging.cpp b/src/bench/logging.cpp
index 9aedb26236d..c97c4e151b6 100644
--- a/src/bench/logging.cpp
+++ b/src/bench/logging.cpp
@@ -5,6 +5,7 @@
 #include <bench/bench.h>
 #include <logging.h>
 #include <test/util/setup_common.h>
+#include <util/chaintype.h>
 
 // All but 2 of the benchmarks should have roughly similar performance:
 //
@@ -18,7 +19,7 @@ static void Logging(benchmark::Bench& bench, const std::vector<const char*>& ext
     LogInstance().DisableCategory(BCLog::LogFlags::ALL);
 
     TestingSetup test_setup{
-        CBaseChainParams::REGTEST,
+        ChainType::REGTEST,
         extra_args,
     };
 
diff --git a/src/bench/mempool_stress.cpp b/src/bench/mempool_stress.cpp
index 80c959cdfbc..826da73800b 100644
--- a/src/bench/mempool_stress.cpp
+++ b/src/bench/mempool_stress.cpp
@@ -7,6 +7,7 @@
 #include <policy/policy.h>
 #include <test/util/setup_common.h>
 #include <txmempool.h>
+#include <util/chaintype.h>
 #include <validation.h>
 
 #include <vector>
@@ -88,7 +89,7 @@ static void ComplexMemPool(benchmark::Bench& bench)
         childTxs = static_cast<int>(bench.complexityN());
     }
     std::vector<CTransactionRef> ordered_coins = CreateOrderedCoins(det_rand, childTxs, /*min_ancestors=*/1);
-    const auto testing_setup = MakeNoLogFileContext<const TestingSetup>(CBaseChainParams::MAIN);
+    const auto testing_setup = MakeNoLogFileContext<const TestingSetup>(ChainType::MAIN);
     CTxMemPool& pool = *testing_setup.get()->m_node.mempool;
     LOCK2(cs_main, pool.cs);
     bench.run([&]() NO_THREAD_SAFETY_ANALYSIS {
@@ -103,7 +104,7 @@ static void ComplexMemPool(benchmark::Bench& bench)
 static void MempoolCheck(benchmark::Bench& bench)
 {
     FastRandomContext det_rand{true};
-    auto testing_setup = MakeNoLogFileContext<TestChain100Setup>(CBaseChainParams::REGTEST, {"-checkmempool=1"});
+    auto testing_setup = MakeNoLogFileContext<TestChain100Setup>(ChainType::REGTEST, {"-checkmempool=1"});
     CTxMemPool& pool = *testing_setup.get()->m_node.mempool;
     LOCK2(cs_main, pool.cs);
     testing_setup->PopulateMempool(det_rand, 400, true);
diff --git a/src/bench/rpc_blockchain.cpp b/src/bench/rpc_blockchain.cpp
index f68b6acb5b6..a9b197b1901 100644
--- a/src/bench/rpc_blockchain.cpp
+++ b/src/bench/rpc_blockchain.cpp
@@ -8,6 +8,7 @@
 #include <rpc/blockchain.h>
 #include <streams.h>
 #include <test/util/setup_common.h>
+#include <util/chaintype.h>
 #include <validation.h>
 
 #include <univalue.h>
@@ -15,7 +16,7 @@
 namespace {
 
 struct TestBlockAndIndex {
-    const std::unique_ptr<const TestingSetup> testing_setup{MakeNoLogFileContext<const TestingSetup>(CBaseChainParams::MAIN)};
+    const std::unique_ptr<const TestingSetup> testing_setup{MakeNoLogFileContext<const TestingSetup>(ChainType::MAIN)};
     CBlock block{};
     uint256 blockHash{};
     CBlockIndex blockindex{};
diff --git a/src/bench/rpc_mempool.cpp b/src/bench/rpc_mempool.cpp
index e3e1a07c833..7e274370e00 100644
--- a/src/bench/rpc_mempool.cpp
+++ b/src/bench/rpc_mempool.cpp
@@ -3,12 +3,12 @@
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #include <bench/bench.h>
-#include <chainparamsbase.h>
 #include <kernel/cs_main.h>
 #include <kernel/mempool_entry.h>
 #include <rpc/mempool.h>
 #include <test/util/setup_common.h>
 #include <txmempool.h>
+#include <util/chaintype.h>
 
 #include <univalue.h>
 
@@ -21,7 +21,7 @@ static void AddTx(const CTransactionRef& tx, const CAmount& fee, CTxMemPool& poo
 
 static void RpcMempool(benchmark::Bench& bench)
 {
-    const auto testing_setup = MakeNoLogFileContext<const ChainTestingSetup>(CBaseChainParams::MAIN);
+    const auto testing_setup = MakeNoLogFileContext<const ChainTestingSetup>(ChainType::MAIN);
     CTxMemPool& pool = *Assert(testing_setup->m_node.mempool);
     LOCK2(cs_main, pool.cs);
 
diff --git a/src/bitcoin-chainstate.cpp b/src/bitcoin-chainstate.cpp
index 2b139cf9084..52e697a78d9 100644
--- a/src/bitcoin-chainstate.cpp
+++ b/src/bitcoin-chainstate.cpp
@@ -25,6 +25,7 @@
 #include <node/chainstate.h>
 #include <scheduler.h>
 #include <script/sigcache.h>
+#include <util/chaintype.h>
 #include <util/thread.h>
 #include <validation.h>
 #include <validationinterface.h>
@@ -52,7 +53,7 @@ int main(int argc, char* argv[])
 
 
     // SETUP: Misc Globals
-    SelectParams(CBaseChainParams::MAIN);
+    SelectParams(ChainType::MAIN);
     auto chainparams = CChainParams::Main();
 
     kernel::Context kernel_context{};
diff --git a/src/bitcoin-cli.cpp b/src/bitcoin-cli.cpp
index 63ba6a935d2..a66134128dd 100644
--- a/src/bitcoin-cli.cpp
+++ b/src/bitcoin-cli.cpp
@@ -20,6 +20,7 @@
 #include <rpc/request.h>
 #include <tinyformat.h>
 #include <univalue.h>
+#include <util/chaintype.h>
 #include <util/exception.h>
 #include <util/strencodings.h>
 #include <util/system.h>
@@ -73,10 +74,10 @@ static void SetupCliArgs(ArgsManager& argsman)
 {
     SetupHelpOptions(argsman);
 
-    const auto defaultBaseParams = CreateBaseChainParams(CBaseChainParams::MAIN);
-    const auto testnetBaseParams = CreateBaseChainParams(CBaseChainParams::TESTNET);
-    const auto signetBaseParams = CreateBaseChainParams(CBaseChainParams::SIGNET);
-    const auto regtestBaseParams = CreateBaseChainParams(CBaseChainParams::REGTEST);
+    const auto defaultBaseParams = CreateBaseChainParams(ChainType::MAIN);
+    const auto testnetBaseParams = CreateBaseChainParams(ChainType::TESTNET);
+    const auto signetBaseParams = CreateBaseChainParams(ChainType::SIGNET);
+    const auto regtestBaseParams = CreateBaseChainParams(ChainType::REGTEST);
 
     argsman.AddArg("-version", "Print version and exit", ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
     argsman.AddArg("-conf=<file>", strprintf("Specify configuration file. Relative paths will be prefixed by datadir location. (default: %s)", BITCOIN_CONF_FILENAME), ArgsManager::ALLOW_ANY, OptionsCategory::OPTIONS);
@@ -174,7 +175,7 @@ static int AppInitRPC(int argc, char* argv[])
     }
     // Check for chain settings (BaseParams() calls are only valid after this clause)
     try {
-        SelectBaseParams(gArgs.GetChainName());
+        SelectBaseParams(gArgs.GetChainType());
     } catch (const std::exception& e) {
         tfm::format(std::cerr, "Error: %s\n", e.what());
         return EXIT_FAILURE;
@@ -426,10 +427,16 @@ private:
     std::vector<Peer> m_peers;
     std::string ChainToString() const
     {
-        if (gArgs.GetChainName() == CBaseChainParams::TESTNET) return " testnet";
-        if (gArgs.GetChainName() == CBaseChainParams::SIGNET) return " signet";
-        if (gArgs.GetChainName() == CBaseChainParams::REGTEST) return " regtest";
-        return "";
+        switch (gArgs.GetChainType()) {
+        case ChainType::TESTNET:
+            return " testnet";
+        case ChainType::SIGNET:
+            return " signet";
+        case ChainType::REGTEST:
+            return " regtest";
+        default:
+            return "";
+        }
     }
     std::string PingTimeToString(double seconds) const
     {
diff --git a/src/bitcoin-tx.cpp b/src/bitcoin-tx.cpp
index c35a111313e..e291f20a11c 100644
--- a/src/bitcoin-tx.cpp
+++ b/src/bitcoin-tx.cpp
@@ -6,6 +6,7 @@
 #include <config/bitcoin-config.h>
 #endif
 
+#include <chainparamsbase.h>
 #include <clientversion.h>
 #include <coins.h>
 #include <common/args.h>
@@ -91,7 +92,7 @@ static int AppInitRawTx(int argc, char* argv[])
 
     // Check for chain settings (Params() calls are only valid after this clause)
     try {
-        SelectParams(gArgs.GetChainName());
+        SelectParams(gArgs.GetChainType());
     } catch (const std::exception& e) {
         tfm::format(std::cerr, "Error: %s\n", e.what());
         return EXIT_FAILURE;
diff --git a/src/bitcoin-util.cpp b/src/bitcoin-util.cpp
index e3f70e1b76e..f62a9f7bbfb 100644
--- a/src/bitcoin-util.cpp
+++ b/src/bitcoin-util.cpp
@@ -75,7 +75,7 @@ static int AppInitUtil(ArgsManager& args, int argc, char* argv[])
 
     // Check for chain settings (Params() calls are only valid after this clause)
     try {
-        SelectParams(args.GetChainName());
+        SelectParams(args.GetChainType());
     } catch (const std::exception& e) {
         tfm::format(std::cerr, "Error: %s\n", e.what());
         return EXIT_FAILURE;
diff --git a/src/bitcoin-wallet.cpp b/src/bitcoin-wallet.cpp
index 5dbf8a8616b..1863173aa88 100644
--- a/src/bitcoin-wallet.cpp
+++ b/src/bitcoin-wallet.cpp
@@ -91,7 +91,7 @@ static std::optional<int> WalletAppInit(ArgsManager& args, int argc, char* argv[
         return EXIT_FAILURE;
     }
     // Check for chain settings (Params() calls are only valid after this clause)
-    SelectParams(args.GetChainName());
+    SelectParams(args.GetChainType());
 
     return std::nullopt;
 }
diff --git a/src/chainparams.cpp b/src/chainparams.cpp
index d3d358a3f08..f61bf01745a 100644
--- a/src/chainparams.cpp
+++ b/src/chainparams.cpp
@@ -5,6 +5,7 @@
 
 #include <chainparams.h>
 
+#include <chainparamsbase.h>
 #include <chainparamsseeds.h>
 #include <common/args.h>
 #include <consensus/merkle.h>
@@ -12,6 +13,7 @@
 #include <hash.h> // for signet block challenge hash
 #include <logging.h>
 #include <script/interpreter.h>
+#include <util/chaintype.h>
 #include <util/string.h>
 
 #include <assert.h>
@@ -97,26 +99,29 @@ const CChainParams &Params() {
     return *globalChainParams;
 }
 
-std::unique_ptr<const CChainParams> CreateChainParams(const ArgsManager& args, const std::string& chain)
+std::unique_ptr<const CChainParams> CreateChainParams(const ArgsManager& args, const ChainType chain)
 {
-    if (chain == CBaseChainParams::MAIN) {
+    switch (chain) {
+    case ChainType::MAIN:
         return CChainParams::Main();
-    } else if (chain == CBaseChainParams::TESTNET) {
+    case ChainType::TESTNET:
         return CChainParams::TestNet();
-    } else if (chain == CBaseChainParams::SIGNET) {
+    case ChainType::SIGNET: {
         auto opts = CChainParams::SigNetOptions{};
         ReadSigNetArgs(args, opts);
         return CChainParams::SigNet(opts);
-    } else if (chain == CBaseChainParams::REGTEST) {
+    }
+    case ChainType::REGTEST: {
         auto opts = CChainParams::RegTestOptions{};
         ReadRegTestArgs(args, opts);
         return CChainParams::RegTest(opts);
     }
-    throw std::runtime_error(strprintf("%s: Unknown chain %s.", __func__, chain));
+    }
+    throw std::invalid_argument(strprintf("%s: Invalid ChainType value", __func__));
 }
 
-void SelectParams(const std::string& network)
+void SelectParams(const ChainType chain)
 {
-    SelectBaseParams(network);
-    globalChainParams = CreateChainParams(gArgs, network);
+    SelectBaseParams(chain);
+    globalChainParams = CreateChainParams(gArgs, chain);
 }
diff --git a/src/chainparams.h b/src/chainparams.h
index cb34d068e1a..6a65f40f808 100644
--- a/src/chainparams.h
+++ b/src/chainparams.h
@@ -8,11 +8,11 @@
 
 #include <kernel/chainparams.h>
 
-#include <chainparamsbase.h>
 #include <consensus/params.h>
 #include <netaddress.h>
 #include <primitives/block.h>
 #include <protocol.h>
+#include <util/chaintype.h>
 #include <util/hash_type.h>
 
 #include <cstdint>
@@ -21,12 +21,14 @@
 #include <unordered_map>
 #include <vector>
 
+class ArgsManager;
+
 /**
  * Creates and returns a std::unique_ptr<CChainParams> of the chosen chain.
  * @returns a CChainParams* of the chosen chain.
  * @throws a std::runtime_error if the chain is not supported.
  */
-std::unique_ptr<const CChainParams> CreateChainParams(const ArgsManager& args, const std::string& chain);
+std::unique_ptr<const CChainParams> CreateChainParams(const ArgsManager& args, const ChainType chain);
 
 /**
  * Return the currently selected parameters. This won't change after app
@@ -38,6 +40,6 @@ const CChainParams &Params();
  * Sets the params returned by Params() to those for the given chain name.
  * @throws std::runtime_error when the chain is not supported.
  */
-void SelectParams(const std::string& chain);
+void SelectParams(const ChainType chain);
 
 #endif // BITCOIN_CHAINPARAMS_H
diff --git a/src/chainparamsbase.cpp b/src/chainparamsbase.cpp
index eb7b31923d2..4ebfeae1a7c 100644
--- a/src/chainparamsbase.cpp
+++ b/src/chainparamsbase.cpp
@@ -7,14 +7,10 @@
 
 #include <common/args.h>
 #include <tinyformat.h>
+#include <util/chaintype.h>
 
 #include <assert.h>
 
-const std::string CBaseChainParams::MAIN = "main";
-const std::string CBaseChainParams::TESTNET = "test";
-const std::string CBaseChainParams::SIGNET = "signet";
-const std::string CBaseChainParams::REGTEST = "regtest";
-
 void SetupChainParamsBaseOptions(ArgsManager& argsman)
 {
     argsman.AddArg("-chain=<chain>", "Use the chain <chain> (default: main). Allowed values: main, test, signet, regtest", ArgsManager::ALLOW_ANY, OptionsCategory::CHAINPARAMS);
@@ -40,22 +36,23 @@ const CBaseChainParams& BaseParams()
  * Port numbers for incoming Tor connections (8334, 18334, 38334, 18445) have
  * been chosen arbitrarily to keep ranges of used ports tight.
  */
-std::unique_ptr<CBaseChainParams> CreateBaseChainParams(const std::string& chain)
+std::unique_ptr<CBaseChainParams> CreateBaseChainParams(const ChainType chain)
 {
-    if (chain == CBaseChainParams::MAIN) {
+    switch (chain) {
+    case ChainType::MAIN:
         return std::make_unique<CBaseChainParams>("", 8332, 8334);
-    } else if (chain == CBaseChainParams::TESTNET) {
+    case ChainType::TESTNET:
         return std::make_unique<CBaseChainParams>("testnet3", 18332, 18334);
-    } else if (chain == CBaseChainParams::SIGNET) {
+    case ChainType::SIGNET:
         return std::make_unique<CBaseChainParams>("signet", 38332, 38334);
-    } else if (chain == CBaseChainParams::REGTEST) {
+    case ChainType::REGTEST:
         return std::make_unique<CBaseChainParams>("regtest", 18443, 18445);
     }
-    throw std::runtime_error(strprintf("%s: Unknown chain %s.", __func__, chain));
+    throw std::invalid_argument(strprintf("%s: Invalid ChainType value", __func__));
 }
 
-void SelectBaseParams(const std::string& chain)
+void SelectBaseParams(const ChainType chain)
 {
     globalChainBaseParams = CreateBaseChainParams(chain);
-    gArgs.SelectConfigNetwork(chain);
+    gArgs.SelectConfigNetwork(ChainTypeToString(chain));
 }
diff --git a/src/chainparamsbase.h b/src/chainparamsbase.h
index d593cff722f..73e449d11be 100644
--- a/src/chainparamsbase.h
+++ b/src/chainparamsbase.h
@@ -5,6 +5,8 @@
 #ifndef BITCOIN_CHAINPARAMSBASE_H
 #define BITCOIN_CHAINPARAMSBASE_H
 
+#include <util/chaintype.h>
+
 #include <memory>
 #include <string>
 
@@ -17,14 +19,6 @@ class ArgsManager;
 class CBaseChainParams
 {
 public:
-    ///@{
-    /** Chain name strings */
-    static const std::string MAIN;
-    static const std::string TESTNET;
-    static const std::string SIGNET;
-    static const std::string REGTEST;
-    ///@}
-
     const std::string& DataDir() const { return strDataDir; }
     uint16_t RPCPort() const { return m_rpc_port; }
     uint16_t OnionServiceTargetPort() const { return m_onion_service_target_port; }
@@ -44,7 +38,7 @@ private:
  * @returns a CBaseChainParams* of the chosen chain.
  * @throws a std::runtime_error if the chain is not supported.
  */
-std::unique_ptr<CBaseChainParams> CreateBaseChainParams(const std::string& chain);
+std::unique_ptr<CBaseChainParams> CreateBaseChainParams(const ChainType chain);
 
 /**
  *Set the arguments for chainparams
@@ -57,7 +51,7 @@ void SetupChainParamsBaseOptions(ArgsManager& argsman);
  */
 const CBaseChainParams& BaseParams();
 
-/** Sets the params returned by Params() to those for the given network. */
-void SelectBaseParams(const std::string& chain);
+/** Sets the params returned by Params() to those for the given chain. */
+void SelectBaseParams(const ChainType chain);
 
 #endif // BITCOIN_CHAINPARAMSBASE_H
diff --git a/src/common/args.cpp b/src/common/args.cpp
index d29b8648bf4..93f20059317 100644
--- a/src/common/args.cpp
+++ b/src/common/args.cpp
@@ -10,6 +10,7 @@
 #include <sync.h>
 #include <tinyformat.h>
 #include <univalue.h>
+#include <util/chaintype.h>
 #include <util/check.h>
 #include <util/fs.h>
 #include <util/fs_helpers.h>
@@ -33,6 +34,7 @@
 #include <stdexcept>
 #include <string>
 #include <utility>
+#include <variant>
 
 const char * const BITCOIN_CONF_FILENAME = "bitcoin.conf";
 const char * const BITCOIN_SETTINGS_FILENAME = "settings.json";
@@ -141,7 +143,7 @@ std::set<std::string> ArgsManager::GetUnsuitableSectionOnlyArgs() const
     if (m_network.empty()) return std::set<std::string> {};
 
     // if it's okay to use the default section for this network, don't worry
-    if (m_network == CBaseChainParams::MAIN) return std::set<std::string> {};
+    if (m_network == ChainTypeToString(ChainType::MAIN)) return std::set<std::string> {};
 
     for (const auto& arg : m_network_only_args) {
         if (OnlyHasDefaultSectionSetting(m_settings, m_network, SettingName(arg))) {
@@ -155,10 +157,10 @@ std::list<SectionInfo> ArgsManager::GetUnrecognizedSections() const
 {
     // Section names to be recognized in the config file.
     static const std::set<std::string> available_sections{
-        CBaseChainParams::REGTEST,
-        CBaseChainParams::SIGNET,
-        CBaseChainParams::TESTNET,
-        CBaseChainParams::MAIN
+        ChainTypeToString(ChainType::REGTEST),
+        ChainTypeToString(ChainType::SIGNET),
+        ChainTypeToString(ChainType::TESTNET),
+        ChainTypeToString(ChainType::MAIN),
     };
 
     LOCK(cs_args);
@@ -443,7 +445,7 @@ util::SettingsValue ArgsManager::GetPersistentSetting(const std::string& name) c
 {
     LOCK(cs_args);
     return util::GetSetting(m_settings, m_network, name, !UseDefaultSection("-" + name),
-        /*ignore_nonpersistent=*/true, /*get_chain_name=*/false);
+        /*ignore_nonpersistent=*/true, /*get_chain_type=*/false);
 }
 
 bool ArgsManager::IsArgNegated(const std::string& strArg) const
@@ -717,39 +719,53 @@ fs::path ArgsManager::GetConfigFilePath() const
     return GetConfigFile(*this, GetPathArg("-conf", BITCOIN_CONF_FILENAME));
 }
 
-std::string ArgsManager::GetChainName() const
+ChainType ArgsManager::GetChainType() const
+{
+    std::variant<ChainType, std::string> arg = GetChainArg();
+    if (auto* parsed = std::get_if<ChainType>(&arg)) return *parsed;
+    throw std::runtime_error(strprintf("Unknown chain %s.", std::get<std::string>(arg)));
+}
+
+std::string ArgsManager::GetChainTypeString() const
+{
+    auto arg = GetChainArg();
+    if (auto* parsed = std::get_if<ChainType>(&arg)) return ChainTypeToString(*parsed);
+    return std::get<std::string>(arg);
+}
+
+std::variant<ChainType, std::string> ArgsManager::GetChainArg() const
 {
     auto get_net = [&](const std::string& arg) {
         LOCK(cs_args);
         util::SettingsValue value = util::GetSetting(m_settings, /* section= */ "", SettingName(arg),
             /* ignore_default_section_config= */ false,
             /*ignore_nonpersistent=*/false,
-            /* get_chain_name= */ true);
+            /* get_chain_type= */ true);
         return value.isNull() ? false : value.isBool() ? value.get_bool() : InterpretBool(value.get_str());
     };
 
     const bool fRegTest = get_net("-regtest");
     const bool fSigNet  = get_net("-signet");
     const bool fTestNet = get_net("-testnet");
-    const bool is_chain_arg_set = IsArgSet("-chain");
+    const auto chain_arg = GetArg("-chain");
 
-    if ((int)is_chain_arg_set + (int)fRegTest + (int)fSigNet + (int)fTestNet > 1) {
+    if ((int)chain_arg.has_value() + (int)fRegTest + (int)fSigNet + (int)fTestNet > 1) {
         throw std::runtime_error("Invalid combination of -regtest, -signet, -testnet and -chain. Can use at most one.");
     }
-    if (fRegTest)
-        return CBaseChainParams::REGTEST;
-    if (fSigNet) {
-        return CBaseChainParams::SIGNET;
+    if (chain_arg) {
+        if (auto parsed = ChainTypeFromString(*chain_arg)) return *parsed;
+        // Not a known string, so return original string
+        return *chain_arg;
     }
-    if (fTestNet)
-        return CBaseChainParams::TESTNET;
-
-    return GetArg("-chain", CBaseChainParams::MAIN);
+    if (fRegTest) return ChainType::REGTEST;
+    if (fSigNet) return ChainType::SIGNET;
+    if (fTestNet) return ChainType::TESTNET;
+    return ChainType::MAIN;
 }
 
 bool ArgsManager::UseDefaultSection(const std::string& arg) const
 {
-    return m_network == CBaseChainParams::MAIN || m_network_only_args.count(arg) == 0;
+    return m_network == ChainTypeToString(ChainType::MAIN) || m_network_only_args.count(arg) == 0;
 }
 
 util::SettingsValue ArgsManager::GetSetting(const std::string& arg) const
@@ -757,7 +773,7 @@ util::SettingsValue ArgsManager::GetSetting(const std::string& arg) const
     LOCK(cs_args);
     return util::GetSetting(
         m_settings, m_network, SettingName(arg), !UseDefaultSection(arg),
-        /*ignore_nonpersistent=*/false, /*get_chain_name=*/false);
+        /*ignore_nonpersistent=*/false, /*get_chain_type=*/false);
 }
 
 std::vector<util::SettingsValue> ArgsManager::GetSettingsList(const std::string& arg) const
diff --git a/src/common/args.h b/src/common/args.h
index 430c392e2bc..5335633911b 100644
--- a/src/common/args.h
+++ b/src/common/args.h
@@ -7,6 +7,7 @@
 
 #include <compat/compat.h>
 #include <sync.h>
+#include <util/chaintype.h>
 #include <util/fs.h>
 #include <util/settings.h>
 
@@ -17,6 +18,7 @@
 #include <set>
 #include <stdint.h>
 #include <string>
+#include <variant>
 #include <vector>
 
 class ArgsManager;
@@ -324,9 +326,17 @@ protected:
 
     /**
      * Returns the appropriate chain name from the program arguments.
-     * @return CBaseChainParams::MAIN by default; raises runtime error if an invalid combination is given.
+     * @return ChainType::MAIN by default; raises runtime error if an invalid
+     * combination, or unknown chain is given.
      */
-    std::string GetChainName() const;
+    ChainType GetChainType() const;
+
+    /**
+     * Returns the appropriate chain name string from the program arguments.
+     * @return ChainType::MAIN string by default; raises runtime error if an
+     * invalid combination is given.
+     */
+    std::string GetChainTypeString() const;
 
     /**
      * Add argument
@@ -411,6 +421,14 @@ private:
      */
     const fs::path& GetDataDir(bool net_specific) const;
 
+    /**
+     * Return -regtest/-signet/-testnet/-chain= setting as a ChainType enum if a
+     * recognized chain name was set, or as a string if an unrecognized chain
+     * name was set. Raise an exception if an invalid combination of flags was
+     * provided.
+     */
+    std::variant<ChainType, std::string> GetChainArg() const;
+
     // Helper function for LogArgs().
     void logArgsPrefix(
         const std::string& prefix,
diff --git a/src/common/config.cpp b/src/common/config.cpp
index 747503ad2ac..5efb5efb67f 100644
--- a/src/common/config.cpp
+++ b/src/common/config.cpp
@@ -8,6 +8,7 @@
 #include <sync.h>
 #include <tinyformat.h>
 #include <univalue.h>
+#include <util/chaintype.h>
 #include <util/fs.h>
 #include <util/settings.h>
 #include <util/string.h>
@@ -152,7 +153,7 @@ bool ArgsManager::ReadConfigFiles(std::string& error, bool ignore_invalid_keys)
             }
         }
         if (use_conf_file) {
-            std::string chain_id = GetChainName();
+            std::string chain_id = GetChainTypeString();
             std::vector<std::string> conf_file_names;
 
             auto add_includes = [&](const std::string& network, size_t skip = 0) {
@@ -191,7 +192,7 @@ bool ArgsManager::ReadConfigFiles(std::string& error, bool ignore_invalid_keys)
             conf_file_names.clear();
             add_includes(chain_id, /* skip= */ chain_includes);
             add_includes({}, /* skip= */ default_includes);
-            std::string chain_id_final = GetChainName();
+            std::string chain_id_final = GetChainTypeString();
             if (chain_id_final != chain_id) {
                 // Also warn about recursive includeconf for the chain that was specified in one of the includeconfs
                 add_includes(chain_id_final);
diff --git a/src/common/init.cpp b/src/common/init.cpp
index 6ffa44847ac..8933d59c270 100644
--- a/src/common/init.cpp
+++ b/src/common/init.cpp
@@ -26,7 +26,7 @@ std::optional<ConfigError> InitConfig(ArgsManager& args, SettingsAbortFn setting
         }
 
         // Check for chain settings (Params() calls are only valid after this clause)
-        SelectParams(args.GetChainName());
+        SelectParams(args.GetChainType());
 
         // Create datadir if it does not exist.
         const auto base_path{args.GetDataDirBase()};
diff --git a/src/init.cpp b/src/init.cpp
index ddee3bddc2f..802397b3cf0 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -18,6 +18,7 @@
 #include <blockfilter.h>
 #include <chain.h>
 #include <chainparams.h>
+#include <chainparamsbase.h>
 #include <common/args.h>
 #include <consensus/amount.h>
 #include <deploymentstatus.h>
@@ -69,6 +70,7 @@
 #include <txdb.h>
 #include <txmempool.h>
 #include <util/asmap.h>
+#include <util/chaintype.h>
 #include <util/check.h>
 #include <util/fs.h>
 #include <util/fs_helpers.h>
@@ -408,14 +410,14 @@ void SetupServerArgs(ArgsManager& argsman)
 
     init::AddLoggingArgs(argsman);
 
-    const auto defaultBaseParams = CreateBaseChainParams(CBaseChainParams::MAIN);
-    const auto testnetBaseParams = CreateBaseChainParams(CBaseChainParams::TESTNET);
-    const auto signetBaseParams = CreateBaseChainParams(CBaseChainParams::SIGNET);
-    const auto regtestBaseParams = CreateBaseChainParams(CBaseChainParams::REGTEST);
-    const auto defaultChainParams = CreateChainParams(argsman, CBaseChainParams::MAIN);
-    const auto testnetChainParams = CreateChainParams(argsman, CBaseChainParams::TESTNET);
-    const auto signetChainParams = CreateChainParams(argsman, CBaseChainParams::SIGNET);
-    const auto regtestChainParams = CreateChainParams(argsman, CBaseChainParams::REGTEST);
+    const auto defaultBaseParams = CreateBaseChainParams(ChainType::MAIN);
+    const auto testnetBaseParams = CreateBaseChainParams(ChainType::TESTNET);
+    const auto signetBaseParams = CreateBaseChainParams(ChainType::SIGNET);
+    const auto regtestBaseParams = CreateBaseChainParams(ChainType::REGTEST);
+    const auto defaultChainParams = CreateChainParams(argsman, ChainType::MAIN);
+    const auto testnetChainParams = CreateChainParams(argsman, ChainType::TESTNET);
+    const auto signetChainParams = CreateChainParams(argsman, ChainType::SIGNET);
+    const auto regtestChainParams = CreateChainParams(argsman, ChainType::REGTEST);
 
     // Hidden Options
     std::vector<std::string> hidden_args = {
@@ -844,14 +846,14 @@ bool AppInitParameterInteraction(const ArgsManager& args, bool use_syscall_sandb
 
     // Error if network-specific options (-addnode, -connect, etc) are
     // specified in default section of config file, but not overridden
-    // on the command line or in this network's section of the config file.
-    std::string network = args.GetChainName();
-    if (network == CBaseChainParams::SIGNET) {
+    // on the command line or in this chain's section of the config file.
+    ChainType chain = args.GetChainType();
+    if (chain == ChainType::SIGNET) {
         LogPrintf("Signet derived magic (message start): %s\n", HexStr(chainparams.MessageStart()));
     }
     bilingual_str errors;
     for (const auto& arg : args.GetUnsuitableSectionOnlyArgs()) {
-        errors += strprintf(_("Config setting for %s only applied on %s network when in [%s] section.") + Untranslated("\n"), arg, network, network);
+        errors += strprintf(_("Config setting for %s only applied on %s network when in [%s] section.") + Untranslated("\n"), arg, ChainTypeToString(chain), ChainTypeToString(chain));
     }
 
     if (!errors.empty()) {
diff --git a/src/kernel/chainparams.cpp b/src/kernel/chainparams.cpp
index 2827737ee19..d9ed1547b36 100644
--- a/src/kernel/chainparams.cpp
+++ b/src/kernel/chainparams.cpp
@@ -10,13 +10,13 @@
 #include <consensus/merkle.h>
 #include <consensus/params.h>
 #include <hash.h>
-#include <chainparamsbase.h>
 #include <logging.h>
 #include <primitives/block.h>
 #include <primitives/transaction.h>
 #include <script/interpreter.h>
 #include <script/script.h>
 #include <uint256.h>
+#include <util/chaintype.h>
 #include <util/strencodings.h>
 
 #include <algorithm>
@@ -70,7 +70,7 @@ static CBlock CreateGenesisBlock(uint32_t nTime, uint32_t nNonce, uint32_t nBits
 class CMainParams : public CChainParams {
 public:
     CMainParams() {
-        strNetworkID = CBaseChainParams::MAIN;
+        m_chain_type = ChainType::MAIN;
         consensus.signet_blocks = false;
         consensus.signet_challenge.clear();
         consensus.nSubsidyHalvingInterval = 210000;
@@ -192,7 +192,7 @@ public:
 class CTestNetParams : public CChainParams {
 public:
     CTestNetParams() {
-        strNetworkID = CBaseChainParams::TESTNET;
+        m_chain_type = ChainType::TESTNET;
         consensus.signet_blocks = false;
         consensus.signet_challenge.clear();
         consensus.nSubsidyHalvingInterval = 210000;
@@ -328,7 +328,7 @@ public:
             vSeeds = *options.seeds;
         }
 
-        strNetworkID = CBaseChainParams::SIGNET;
+        m_chain_type = ChainType::SIGNET;
         consensus.signet_blocks = true;
         consensus.signet_challenge.assign(bin.begin(), bin.end());
         consensus.nSubsidyHalvingInterval = 210000;
@@ -397,7 +397,7 @@ class CRegTestParams : public CChainParams
 public:
     explicit CRegTestParams(const RegTestOptions& opts)
     {
-        strNetworkID =  CBaseChainParams::REGTEST;
+        m_chain_type = ChainType::REGTEST;
         consensus.signet_blocks = false;
         consensus.signet_challenge.clear();
         consensus.nSubsidyHalvingInterval = 150;
diff --git a/src/kernel/chainparams.h b/src/kernel/chainparams.h
index 32fe618dbd0..ad0b49a885d 100644
--- a/src/kernel/chainparams.h
+++ b/src/kernel/chainparams.h
@@ -11,6 +11,7 @@
 #include <primitives/block.h>
 #include <protocol.h>
 #include <uint256.h>
+#include <util/chaintype.h>
 #include <util/hash_type.h>
 
 #include <cstdint>
@@ -114,8 +115,10 @@ public:
     uint64_t AssumedChainStateSize() const { return m_assumed_chain_state_size; }
     /** Whether it is possible to mine blocks on demand (no retargeting) */
     bool MineBlocksOnDemand() const { return consensus.fPowNoRetargeting; }
-    /** Return the network string */
-    std::string NetworkIDString() const { return strNetworkID; }
+    /** Return the chain type string */
+    std::string GetChainTypeString() const { return ChainTypeToString(m_chain_type); }
+    /** Return the chain type */
+    ChainType GetChainType() const { return m_chain_type; }
     /** Return the list of hostnames to look up for DNS seeds */
     const std::vector<std::string>& DNSSeeds() const { return vSeeds; }
     const std::vector<unsigned char>& Base58Prefix(Base58Type type) const { return base58Prefixes[type]; }
@@ -172,7 +175,7 @@ protected:
     std::vector<std::string> vSeeds;
     std::vector<unsigned char> base58Prefixes[MAX_BASE58_TYPES];
     std::string bech32_hrp;
-    std::string strNetworkID;
+    ChainType m_chain_type;
     CBlock genesis;
     std::vector<uint8_t> vFixedSeeds;
     bool fDefaultConsistencyChecks;
diff --git a/src/node/interfaces.cpp b/src/node/interfaces.cpp
index 5fcace833f6..49b88c3596e 100644
--- a/src/node/interfaces.cpp
+++ b/src/node/interfaces.cpp
@@ -239,7 +239,7 @@ public:
         std::vector<ExternalSigner> signers = {};
         const std::string command = args().GetArg("-signer", "");
         if (command == "") return {};
-        ExternalSigner::Enumerate(command, signers, Params().NetworkIDString());
+        ExternalSigner::Enumerate(command, signers, Params().GetChainTypeString());
         std::vector<std::unique_ptr<interfaces::ExternalSigner>> result;
         result.reserve(signers.size());
         for (auto& signer : signers) {
diff --git a/src/node/mempool_args.cpp b/src/node/mempool_args.cpp
index f1934695068..294111a58a6 100644
--- a/src/node/mempool_args.cpp
+++ b/src/node/mempool_args.cpp
@@ -89,7 +89,7 @@ std::optional<bilingual_str> ApplyArgsManOptions(const ArgsManager& argsman, con
 
     mempool_opts.require_standard = !argsman.GetBoolArg("-acceptnonstdtxn", !chainparams.RequireStandard());
     if (!chainparams.IsTestChain() && !mempool_opts.require_standard) {
-        return strprintf(Untranslated("acceptnonstdtxn is not currently supported for %s chain"), chainparams.NetworkIDString());
+        return strprintf(Untranslated("acceptnonstdtxn is not currently supported for %s chain"), chainparams.GetChainTypeString());
     }
 
     mempool_opts.full_rbf = argsman.GetBoolArg("-mempoolfullrbf", mempool_opts.full_rbf);
diff --git a/src/qt/bitcoin.cpp b/src/qt/bitcoin.cpp
index 2f000095960..d602d2c1ac2 100644
--- a/src/qt/bitcoin.cpp
+++ b/src/qt/bitcoin.cpp
@@ -601,7 +601,7 @@ int GuiMain(int argc, char* argv[])
     PaymentServer::ipcParseCommandLine(argc, argv);
 #endif
 
-    QScopedPointer<const NetworkStyle> networkStyle(NetworkStyle::instantiate(Params().NetworkIDString()));
+    QScopedPointer<const NetworkStyle> networkStyle(NetworkStyle::instantiate(Params().GetChainType()));
     assert(!networkStyle.isNull());
     // Allow for separate UI settings for testnets
     QApplication::setApplicationName(networkStyle->getAppName());
diff --git a/src/qt/guiutil.cpp b/src/qt/guiutil.cpp
index dc7daed4bc7..8d8328aad8a 100644
--- a/src/qt/guiutil.cpp
+++ b/src/qt/guiutil.cpp
@@ -21,6 +21,7 @@
 #include <protocol.h>
 #include <script/script.h>
 #include <script/standard.h>
+#include <util/chaintype.h>
 #include <util/exception.h>
 #include <util/fs.h>
 #include <util/fs_helpers.h>
@@ -503,12 +504,12 @@ bool LabelOutOfFocusEventFilter::eventFilter(QObject* watched, QEvent* event)
 #ifdef WIN32
 fs::path static StartupShortcutPath()
 {
-    std::string chain = gArgs.GetChainName();
-    if (chain == CBaseChainParams::MAIN)
+    ChainType chain = gArgs.GetChainType();
+    if (chain == ChainType::MAIN)
         return GetSpecialFolderPath(CSIDL_STARTUP) / "Bitcoin.lnk";
-    if (chain == CBaseChainParams::TESTNET) // Remove this special case when CBaseChainParams::TESTNET = "testnet4"
+    if (chain == ChainType::TESTNET) // Remove this special case when testnet CBaseChainParams::DataDir() is incremented to "testnet4"
         return GetSpecialFolderPath(CSIDL_STARTUP) / "Bitcoin (testnet).lnk";
-    return GetSpecialFolderPath(CSIDL_STARTUP) / fs::u8path(strprintf("Bitcoin (%s).lnk", chain));
+    return GetSpecialFolderPath(CSIDL_STARTUP) / fs::u8path(strprintf("Bitcoin (%s).lnk", ChainTypeToString(chain)));
 }
 
 bool GetStartOnSystemStartup()
@@ -541,7 +542,7 @@ bool SetStartOnSystemStartup(bool fAutoStart)
             // Start client minimized
             QString strArgs = "-min";
             // Set -testnet /-regtest options
-            strArgs += QString::fromStdString(strprintf(" -chain=%s", gArgs.GetChainName()));
+            strArgs += QString::fromStdString(strprintf(" -chain=%s", gArgs.GetChainTypeString()));
 
             // Set the path to the shortcut target
             psl->SetPath(pszExePath);
@@ -586,10 +587,10 @@ fs::path static GetAutostartDir()
 
 fs::path static GetAutostartFilePath()
 {
-    std::string chain = gArgs.GetChainName();
-    if (chain == CBaseChainParams::MAIN)
+    ChainType chain = gArgs.GetChainType();
+    if (chain == ChainType::MAIN)
         return GetAutostartDir() / "bitcoin.desktop";
-    return GetAutostartDir() / fs::u8path(strprintf("bitcoin-%s.desktop", chain));
+    return GetAutostartDir() / fs::u8path(strprintf("bitcoin-%s.desktop", ChainTypeToString(chain)));
 }
 
 bool GetStartOnSystemStartup()
@@ -629,15 +630,15 @@ bool SetStartOnSystemStartup(bool fAutoStart)
         std::ofstream optionFile{GetAutostartFilePath(), std::ios_base::out | std::ios_base::trunc};
         if (!optionFile.good())
             return false;
-        std::string chain = gArgs.GetChainName();
+        ChainType chain = gArgs.GetChainType();
         // Write a bitcoin.desktop file to the autostart directory:
         optionFile << "[Desktop Entry]\n";
         optionFile << "Type=Application\n";
-        if (chain == CBaseChainParams::MAIN)
+        if (chain == ChainType::MAIN)
             optionFile << "Name=Bitcoin\n";
         else
-            optionFile << strprintf("Name=Bitcoin (%s)\n", chain);
-        optionFile << "Exec=" << pszExePath << strprintf(" -min -chain=%s\n", chain);
+            optionFile << strprintf("Name=Bitcoin (%s)\n", ChainTypeToString(chain));
+        optionFile << "Exec=" << pszExePath << strprintf(" -min -chain=%s\n", ChainTypeToString(chain));
         optionFile << "Terminal=false\n";
         optionFile << "Hidden=false\n";
         optionFile.close();
diff --git a/src/qt/intro.cpp b/src/qt/intro.cpp
index a54ba19354c..f86b1670764 100644
--- a/src/qt/intro.cpp
+++ b/src/qt/intro.cpp
@@ -9,6 +9,7 @@
 #include <chainparams.h>
 #include <qt/intro.h>
 #include <qt/forms/ui_intro.h>
+#include <util/chaintype.h>
 #include <util/fs.h>
 
 #include <qt/guiconstants.h>
@@ -219,7 +220,7 @@ bool Intro::showIfNeeded(bool& did_show_intro, int64_t& prune_MiB)
     {
         /* Use selectParams here to guarantee Params() can be used by node interface */
         try {
-            SelectParams(gArgs.GetChainName());
+            SelectParams(gArgs.GetChainType());
         } catch (const std::exception&) {
             return false;
         }
diff --git a/src/qt/networkstyle.cpp b/src/qt/networkstyle.cpp
index b789e6a9587..b6314f55331 100644
--- a/src/qt/networkstyle.cpp
+++ b/src/qt/networkstyle.cpp
@@ -6,21 +6,21 @@
 
 #include <qt/guiconstants.h>
 
-#include <chainparamsbase.h>
 #include <tinyformat.h>
+#include <util/chaintype.h>
 
 #include <QApplication>
 
 static const struct {
-    const char *networkId;
+    const ChainType networkId;
     const char *appName;
     const int iconColorHueShift;
     const int iconColorSaturationReduction;
 } network_styles[] = {
-    {"main", QAPP_APP_NAME_DEFAULT, 0, 0},
-    {"test", QAPP_APP_NAME_TESTNET, 70, 30},
-    {"signet", QAPP_APP_NAME_SIGNET, 35, 15},
-    {"regtest", QAPP_APP_NAME_REGTEST, 160, 30},
+    {ChainType::MAIN, QAPP_APP_NAME_DEFAULT, 0, 0},
+    {ChainType::TESTNET, QAPP_APP_NAME_TESTNET, 70, 30},
+    {ChainType::SIGNET, QAPP_APP_NAME_SIGNET, 35, 15},
+    {ChainType::REGTEST, QAPP_APP_NAME_REGTEST, 160, 30},
 };
 
 // titleAddText needs to be const char* for tr()
@@ -77,9 +77,9 @@ NetworkStyle::NetworkStyle(const QString &_appName, const int iconColorHueShift,
     trayAndWindowIcon   = QIcon(pixmap.scaled(QSize(256,256)));
 }
 
-const NetworkStyle* NetworkStyle::instantiate(const std::string& networkId)
+const NetworkStyle* NetworkStyle::instantiate(const ChainType networkId)
 {
-    std::string titleAddText = networkId == CBaseChainParams::MAIN ? "" : strprintf("[%s]", networkId);
+    std::string titleAddText = networkId == ChainType::MAIN ? "" : strprintf("[%s]", ChainTypeToString(networkId));
     for (const auto& network_style : network_styles) {
         if (networkId == network_style.networkId) {
             return new NetworkStyle(
diff --git a/src/qt/networkstyle.h b/src/qt/networkstyle.h
index a73e3e26259..dd2aee3eb38 100644
--- a/src/qt/networkstyle.h
+++ b/src/qt/networkstyle.h
@@ -5,6 +5,8 @@
 #ifndef BITCOIN_QT_NETWORKSTYLE_H
 #define BITCOIN_QT_NETWORKSTYLE_H
 
+#include <util/chaintype.h>
+
 #include <QIcon>
 #include <QPixmap>
 #include <QString>
@@ -14,7 +16,7 @@ class NetworkStyle
 {
 public:
     /** Get style associated with provided network id, or 0 if not known */
-    static const NetworkStyle* instantiate(const std::string& networkId);
+    static const NetworkStyle* instantiate(const ChainType networkId);
 
     const QString &getAppName() const { return appName; }
     const QIcon &getAppIcon() const { return appIcon; }
diff --git a/src/qt/rpcconsole.cpp b/src/qt/rpcconsole.cpp
index 76500a4a364..972bc36ad29 100644
--- a/src/qt/rpcconsole.cpp
+++ b/src/qt/rpcconsole.cpp
@@ -744,7 +744,7 @@ void RPCConsole::setClientModel(ClientModel *model, int bestblock_height, int64_
         ui->dataDir->setText(model->dataDir());
         ui->blocksDir->setText(model->blocksDir());
         ui->startupTime->setText(model->formatClientStartupTime());
-        ui->networkName->setText(QString::fromStdString(Params().NetworkIDString()));
+        ui->networkName->setText(QString::fromStdString(Params().GetChainTypeString()));
 
         //Setup autocomplete and attach it
         QStringList wordList;
diff --git a/src/qt/test/apptests.cpp b/src/qt/test/apptests.cpp
index 000bbe65be0..e918e841848 100644
--- a/src/qt/test/apptests.cpp
+++ b/src/qt/test/apptests.cpp
@@ -73,7 +73,7 @@ void AppTests::appTests()
     qRegisterMetaType<interfaces::BlockAndHeaderTipInfo>("interfaces::BlockAndHeaderTipInfo");
     m_app.parameterSetup();
     QVERIFY(m_app.createOptionsModel(/*resetSettings=*/true));
-    QScopedPointer<const NetworkStyle> style(NetworkStyle::instantiate(Params().NetworkIDString()));
+    QScopedPointer<const NetworkStyle> style(NetworkStyle::instantiate(Params().GetChainType()));
     m_app.setupPlatformStyle();
     m_app.createWindow(style.data());
     connect(&m_app, &BitcoinApplication::windowShown, this, &AppTests::guiTests);
diff --git a/src/qt/test/test_main.cpp b/src/qt/test/test_main.cpp
index 2d069f76a0d..eaadbd7f7a2 100644
--- a/src/qt/test/test_main.cpp
+++ b/src/qt/test/test_main.cpp
@@ -14,6 +14,7 @@
 #include <qt/test/rpcnestedtests.h>
 #include <qt/test/uritests.h>
 #include <test/util/setup_common.h>
+#include <util/chaintype.h>
 
 #ifdef ENABLE_WALLET
 #include <qt/test/addressbooktests.h>
@@ -57,7 +58,7 @@ int main(int argc, char* argv[])
     //
     // All tests must use their own testing setup (if needed).
     fs::create_directories([] {
-        BasicTestingSetup dummy{CBaseChainParams::REGTEST};
+        BasicTestingSetup dummy{ChainType::REGTEST};
         return gArgs.GetDataDirNet() / "blocks";
     }());
 
diff --git a/src/rpc/blockchain.cpp b/src/rpc/blockchain.cpp
index 11484a9d8d1..e7a40f812c7 100644
--- a/src/rpc/blockchain.cpp
+++ b/src/rpc/blockchain.cpp
@@ -1256,7 +1256,7 @@ RPCHelpMan getblockchaininfo()
     const CBlockIndex& tip{*CHECK_NONFATAL(active_chainstate.m_chain.Tip())};
     const int height{tip.nHeight};
     UniValue obj(UniValue::VOBJ);
-    obj.pushKV("chain", chainman.GetParams().NetworkIDString());
+    obj.pushKV("chain", chainman.GetParams().GetChainTypeString());
     obj.pushKV("blocks", height);
     obj.pushKV("headers", chainman.m_best_header ? chainman.m_best_header->nHeight : -1);
     obj.pushKV("bestblockhash", tip.GetBlockHash().GetHex());
diff --git a/src/rpc/external_signer.cpp b/src/rpc/external_signer.cpp
index 1e139c9990e..ac135ba216a 100644
--- a/src/rpc/external_signer.cpp
+++ b/src/rpc/external_signer.cpp
@@ -2,7 +2,6 @@
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
-#include <chainparamsbase.h>
 #include <common/args.h>
 #include <external_signer.h>
 #include <rpc/protocol.h>
@@ -43,7 +42,7 @@ static RPCHelpMan enumeratesigners()
         {
             const std::string command = gArgs.GetArg("-signer", "");
             if (command == "") throw JSONRPCError(RPC_MISC_ERROR, "Error: restart bitcoind with -signer=<cmd>");
-            const std::string chain = gArgs.GetChainName();
+            const std::string chain = gArgs.GetChainTypeString();
             UniValue signers_res = UniValue::VARR;
             try {
                 std::vector<ExternalSigner> signers;
diff --git a/src/rpc/mining.cpp b/src/rpc/mining.cpp
index d55e20ba5e3..334bc988cca 100644
--- a/src/rpc/mining.cpp
+++ b/src/rpc/mining.cpp
@@ -435,7 +435,7 @@ static RPCHelpMan getmininginfo()
     obj.pushKV("difficulty",       (double)GetDifficulty(active_chain.Tip()));
     obj.pushKV("networkhashps",    getnetworkhashps().HandleRequest(request));
     obj.pushKV("pooledtx",         (uint64_t)mempool.size());
-    obj.pushKV("chain", chainman.GetParams().NetworkIDString());
+    obj.pushKV("chain", chainman.GetParams().GetChainTypeString());
     obj.pushKV("warnings",         GetWarnings(false).original);
     return obj;
 },
diff --git a/src/rpc/net.cpp b/src/rpc/net.cpp
index 9e9b4765ea2..f247e6ee919 100644
--- a/src/rpc/net.cpp
+++ b/src/rpc/net.cpp
@@ -21,6 +21,7 @@
 #include <rpc/util.h>
 #include <sync.h>
 #include <timedata.h>
+#include <util/chaintype.h>
 #include <util/strencodings.h>
 #include <util/string.h>
 #include <util/time.h>
@@ -354,7 +355,7 @@ static RPCHelpMan addconnection()
         },
         [&](const RPCHelpMan& self, const JSONRPCRequest& request) -> UniValue
 {
-    if (Params().NetworkIDString() != CBaseChainParams::REGTEST) {
+    if (Params().GetChainType() != ChainType::REGTEST) {
         throw std::runtime_error("addconnection is for regression testing (-regtest mode) only.");
     }
 
diff --git a/src/test/argsman_tests.cpp b/src/test/argsman_tests.cpp
index 6a0925f0bbb..4d6ef206c75 100644
--- a/src/test/argsman_tests.cpp
+++ b/src/test/argsman_tests.cpp
@@ -8,6 +8,7 @@
 #include <test/util/setup_common.h>
 #include <test/util/str.h>
 #include <univalue.h>
+#include <util/chaintype.h>
 #include <util/fs.h>
 #include <util/strencodings.h>
 
@@ -580,7 +581,7 @@ BOOST_AUTO_TEST_CASE(util_ReadConfigStream)
     test_args.SetNetworkOnlyArg("-ccc");
     test_args.SetNetworkOnlyArg("-h");
 
-    test_args.SelectConfigNetwork(CBaseChainParams::MAIN);
+    test_args.SelectConfigNetwork(ChainTypeToString(ChainType::MAIN));
     BOOST_CHECK(test_args.GetArg("-d", "xxx") == "e");
     BOOST_CHECK(test_args.GetArgs("-ccc").size() == 2);
     BOOST_CHECK(test_args.GetArg("-h", "xxx") == "0");
@@ -637,7 +638,7 @@ BOOST_AUTO_TEST_CASE(util_GetArg)
     BOOST_CHECK_EQUAL(testArgs.GetArg("pritest4", "default"), "b");
 }
 
-BOOST_AUTO_TEST_CASE(util_GetChainName)
+BOOST_AUTO_TEST_CASE(util_GetChainTypeString)
 {
     TestArgsManager test_args;
     const auto testnet = std::make_pair("-testnet", ArgsManager::ALLOW_ANY);
@@ -655,39 +656,39 @@ BOOST_AUTO_TEST_CASE(util_GetChainName)
     std::string error;
 
     BOOST_CHECK(test_args.ParseParameters(0, (char**)argv_testnet, error));
-    BOOST_CHECK_EQUAL(test_args.GetChainName(), "main");
+    BOOST_CHECK_EQUAL(test_args.GetChainTypeString(), "main");
 
     BOOST_CHECK(test_args.ParseParameters(2, (char**)argv_testnet, error));
-    BOOST_CHECK_EQUAL(test_args.GetChainName(), "test");
+    BOOST_CHECK_EQUAL(test_args.GetChainTypeString(), "test");
 
     BOOST_CHECK(test_args.ParseParameters(2, (char**)argv_regtest, error));
-    BOOST_CHECK_EQUAL(test_args.GetChainName(), "regtest");
+    BOOST_CHECK_EQUAL(test_args.GetChainTypeString(), "regtest");
 
     BOOST_CHECK(test_args.ParseParameters(3, (char**)argv_test_no_reg, error));
-    BOOST_CHECK_EQUAL(test_args.GetChainName(), "test");
+    BOOST_CHECK_EQUAL(test_args.GetChainTypeString(), "test");
 
     BOOST_CHECK(test_args.ParseParameters(3, (char**)argv_both, error));
-    BOOST_CHECK_THROW(test_args.GetChainName(), std::runtime_error);
+    BOOST_CHECK_THROW(test_args.GetChainTypeString(), std::runtime_error);
 
     BOOST_CHECK(test_args.ParseParameters(0, (char**)argv_testnet, error));
     test_args.ReadConfigString(testnetconf);
-    BOOST_CHECK_EQUAL(test_args.GetChainName(), "test");
+    BOOST_CHECK_EQUAL(test_args.GetChainTypeString(), "test");
 
     BOOST_CHECK(test_args.ParseParameters(2, (char**)argv_testnet, error));
     test_args.ReadConfigString(testnetconf);
-    BOOST_CHECK_EQUAL(test_args.GetChainName(), "test");
+    BOOST_CHECK_EQUAL(test_args.GetChainTypeString(), "test");
 
     BOOST_CHECK(test_args.ParseParameters(2, (char**)argv_regtest, error));
     test_args.ReadConfigString(testnetconf);
-    BOOST_CHECK_THROW(test_args.GetChainName(), std::runtime_error);
+    BOOST_CHECK_THROW(test_args.GetChainTypeString(), std::runtime_error);
 
     BOOST_CHECK(test_args.ParseParameters(3, (char**)argv_test_no_reg, error));
     test_args.ReadConfigString(testnetconf);
-    BOOST_CHECK_EQUAL(test_args.GetChainName(), "test");
+    BOOST_CHECK_EQUAL(test_args.GetChainTypeString(), "test");
 
     BOOST_CHECK(test_args.ParseParameters(3, (char**)argv_both, error));
     test_args.ReadConfigString(testnetconf);
-    BOOST_CHECK_THROW(test_args.GetChainName(), std::runtime_error);
+    BOOST_CHECK_THROW(test_args.GetChainTypeString(), std::runtime_error);
 
     // check setting the network to test (and thus making
     // [test] regtest=1 potentially relevant) doesn't break things
@@ -695,23 +696,23 @@ BOOST_AUTO_TEST_CASE(util_GetChainName)
 
     BOOST_CHECK(test_args.ParseParameters(0, (char**)argv_testnet, error));
     test_args.ReadConfigString(testnetconf);
-    BOOST_CHECK_EQUAL(test_args.GetChainName(), "test");
+    BOOST_CHECK_EQUAL(test_args.GetChainTypeString(), "test");
 
     BOOST_CHECK(test_args.ParseParameters(2, (char**)argv_testnet, error));
     test_args.ReadConfigString(testnetconf);
-    BOOST_CHECK_EQUAL(test_args.GetChainName(), "test");
+    BOOST_CHECK_EQUAL(test_args.GetChainTypeString(), "test");
 
     BOOST_CHECK(test_args.ParseParameters(2, (char**)argv_regtest, error));
     test_args.ReadConfigString(testnetconf);
-    BOOST_CHECK_THROW(test_args.GetChainName(), std::runtime_error);
+    BOOST_CHECK_THROW(test_args.GetChainTypeString(), std::runtime_error);
 
     BOOST_CHECK(test_args.ParseParameters(2, (char**)argv_test_no_reg, error));
     test_args.ReadConfigString(testnetconf);
-    BOOST_CHECK_EQUAL(test_args.GetChainName(), "test");
+    BOOST_CHECK_EQUAL(test_args.GetChainTypeString(), "test");
 
     BOOST_CHECK(test_args.ParseParameters(3, (char**)argv_both, error));
     test_args.ReadConfigString(testnetconf);
-    BOOST_CHECK_THROW(test_args.GetChainName(), std::runtime_error);
+    BOOST_CHECK_THROW(test_args.GetChainTypeString(), std::runtime_error);
 }
 
 // Test different ways settings can be merged, and verify results. This test can
@@ -755,8 +756,8 @@ struct ArgsMergeTestingSetup : public BasicTestingSetup {
             ForEachNoDup(conf_actions, SET, SECTION_NEGATE, [&] {
                 for (bool soft_set : {false, true}) {
                     for (bool force_set : {false, true}) {
-                        for (const std::string& section : {CBaseChainParams::MAIN, CBaseChainParams::TESTNET, CBaseChainParams::SIGNET}) {
-                            for (const std::string& network : {CBaseChainParams::MAIN, CBaseChainParams::TESTNET, CBaseChainParams::SIGNET}) {
+                        for (const std::string& section : {ChainTypeToString(ChainType::MAIN), ChainTypeToString(ChainType::TESTNET), ChainTypeToString(ChainType::SIGNET)}) {
+                            for (const std::string& network : {ChainTypeToString(ChainType::MAIN), ChainTypeToString(ChainType::TESTNET), ChainTypeToString(ChainType::SIGNET)}) {
                                 for (bool net_specific : {false, true}) {
                                     fn(arg_actions, conf_actions, soft_set, force_set, section, network, net_specific);
                                 }
@@ -913,7 +914,7 @@ BOOST_FIXTURE_TEST_CASE(util_ArgsMerge, ArgsMergeTestingSetup)
     BOOST_CHECK_EQUAL(out_sha_hex, "d1e436c1cd510d0ec44d5205d4b4e3bee6387d316e0075c58206cb16603f3d82");
 }
 
-// Similar test as above, but for ArgsManager::GetChainName function.
+// Similar test as above, but for ArgsManager::GetChainTypeString function.
 struct ChainMergeTestingSetup : public BasicTestingSetup {
     static constexpr int MAX_ACTIONS = 2;
 
@@ -982,7 +983,7 @@ BOOST_FIXTURE_TEST_CASE(util_ChainMerge, ChainMergeTestingSetup)
 
         desc += " || ";
         try {
-            desc += parser.GetChainName();
+            desc += parser.GetChainTypeString();
         } catch (const std::runtime_error& e) {
             desc += "error: ";
             desc += e.what();
diff --git a/src/test/blockmanager_tests.cpp b/src/test/blockmanager_tests.cpp
index 321c86ebfaf..fd33a211470 100644
--- a/src/test/blockmanager_tests.cpp
+++ b/src/test/blockmanager_tests.cpp
@@ -5,6 +5,7 @@
 #include <chainparams.h>
 #include <node/blockstorage.h>
 #include <node/context.h>
+#include <util/chaintype.h>
 #include <validation.h>
 
 #include <boost/test/unit_test.hpp>
@@ -20,7 +21,7 @@ BOOST_FIXTURE_TEST_SUITE(blockmanager_tests, BasicTestingSetup)
 
 BOOST_AUTO_TEST_CASE(blockmanager_find_block_pos)
 {
-    const auto params {CreateChainParams(ArgsManager{}, CBaseChainParams::MAIN)};
+    const auto params {CreateChainParams(ArgsManager{}, ChainType::MAIN)};
     node::BlockManager::Options blockman_opts{
         .chainparams = *params,
     };
diff --git a/src/test/checkqueue_tests.cpp b/src/test/checkqueue_tests.cpp
index 9011e703e84..cb3831071a0 100644
--- a/src/test/checkqueue_tests.cpp
+++ b/src/test/checkqueue_tests.cpp
@@ -7,6 +7,7 @@
 #include <sync.h>
 #include <test/util/random.h>
 #include <test/util/setup_common.h>
+#include <util/chaintype.h>
 #include <util/time.h>
 
 #include <boost/test/unit_test.hpp>
@@ -27,9 +28,9 @@
 struct NoLockLoggingTestingSetup : public TestingSetup {
     NoLockLoggingTestingSetup()
 #ifdef DEBUG_LOCKCONTENTION
-        : TestingSetup{CBaseChainParams::MAIN, /*extra_args=*/{"-debugexclude=lock"}} {}
+        : TestingSetup{ChainType::MAIN, /*extra_args=*/{"-debugexclude=lock"}} {}
 #else
-        : TestingSetup{CBaseChainParams::MAIN} {}
+        : TestingSetup{ChainType::MAIN} {}
 #endif
 };
 
diff --git a/src/test/fuzz/addrman.cpp b/src/test/fuzz/addrman.cpp
index 5ad7a25c53d..7218bb82d1c 100644
--- a/src/test/fuzz/addrman.cpp
+++ b/src/test/fuzz/addrman.cpp
@@ -16,6 +16,7 @@
 #include <test/util/setup_common.h>
 #include <time.h>
 #include <util/asmap.h>
+#include <util/chaintype.h>
 
 #include <cassert>
 #include <cstdint>
@@ -34,7 +35,7 @@ int32_t GetCheckRatio()
 
 void initialize_addrman()
 {
-    static const auto testing_setup = MakeNoLogFileContext<>(CBaseChainParams::REGTEST);
+    static const auto testing_setup = MakeNoLogFileContext<>(ChainType::REGTEST);
     g_setup = testing_setup.get();
 }
 
diff --git a/src/test/fuzz/block.cpp b/src/test/fuzz/block.cpp
index c3e17724ebe..e90dcc189a4 100644
--- a/src/test/fuzz/block.cpp
+++ b/src/test/fuzz/block.cpp
@@ -11,6 +11,7 @@
 #include <pubkey.h>
 #include <streams.h>
 #include <test/fuzz/fuzz.h>
+#include <util/chaintype.h>
 #include <validation.h>
 #include <version.h>
 
@@ -19,7 +20,7 @@
 
 void initialize_block()
 {
-    SelectParams(CBaseChainParams::REGTEST);
+    SelectParams(ChainType::REGTEST);
 }
 
 FUZZ_TARGET_INIT(block, initialize_block)
diff --git a/src/test/fuzz/coins_view.cpp b/src/test/fuzz/coins_view.cpp
index 5843b80c0a6..fc7e000dc79 100644
--- a/src/test/fuzz/coins_view.cpp
+++ b/src/test/fuzz/coins_view.cpp
@@ -3,7 +3,6 @@
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #include <chainparams.h>
-#include <chainparamsbase.h>
 #include <coins.h>
 #include <consensus/amount.h>
 #include <consensus/tx_check.h>
diff --git a/src/test/fuzz/connman.cpp b/src/test/fuzz/connman.cpp
index 0f3c850e667..f81658b8325 100644
--- a/src/test/fuzz/connman.cpp
+++ b/src/test/fuzz/connman.cpp
@@ -4,7 +4,6 @@
 
 #include <addrman.h>
 #include <chainparams.h>
-#include <chainparamsbase.h>
 #include <common/args.h>
 #include <net.h>
 #include <netaddress.h>
diff --git a/src/test/fuzz/descriptor_parse.cpp b/src/test/fuzz/descriptor_parse.cpp
index 1f5601ca9f5..12c22ef2ed9 100644
--- a/src/test/fuzz/descriptor_parse.cpp
+++ b/src/test/fuzz/descriptor_parse.cpp
@@ -6,11 +6,12 @@
 #include <pubkey.h>
 #include <script/descriptor.h>
 #include <test/fuzz/fuzz.h>
+#include <util/chaintype.h>
 
 void initialize_descriptor_parse()
 {
     ECC_Start();
-    SelectParams(CBaseChainParams::MAIN);
+    SelectParams(ChainType::MAIN);
 }
 
 FUZZ_TARGET_INIT(descriptor_parse, initialize_descriptor_parse)
diff --git a/src/test/fuzz/headerssync.cpp b/src/test/fuzz/headerssync.cpp
index 521afadb51d..c1a187038bb 100644
--- a/src/test/fuzz/headerssync.cpp
+++ b/src/test/fuzz/headerssync.cpp
@@ -6,6 +6,7 @@
 #include <test/fuzz/util.h>
 #include <test/util/setup_common.h>
 #include <uint256.h>
+#include <util/chaintype.h>
 #include <util/time.h>
 #include <validation.h>
 
@@ -15,7 +16,7 @@
 static void initialize_headers_sync_state_fuzz()
 {
     static const auto testing_setup = MakeNoLogFileContext<>(
-        /*chain_name=*/CBaseChainParams::MAIN);
+        /*chain_type=*/ChainType::MAIN);
 }
 
 void MakeHeadersContinuous(
diff --git a/src/test/fuzz/integer.cpp b/src/test/fuzz/integer.cpp
index ead877fe055..392f3591f13 100644
--- a/src/test/fuzz/integer.cpp
+++ b/src/test/fuzz/integer.cpp
@@ -26,6 +26,7 @@
 #include <test/fuzz/util.h>
 #include <uint256.h>
 #include <univalue.h>
+#include <util/chaintype.h>
 #include <util/check.h>
 #include <util/moneystr.h>
 #include <util/overflow.h>
@@ -42,7 +43,7 @@
 
 void initialize_integer()
 {
-    SelectParams(CBaseChainParams::REGTEST);
+    SelectParams(ChainType::REGTEST);
 }
 
 FUZZ_TARGET_INIT(integer, initialize_integer)
diff --git a/src/test/fuzz/key.cpp b/src/test/fuzz/key.cpp
index ea6883c08d5..3eab2e20c05 100644
--- a/src/test/fuzz/key.cpp
+++ b/src/test/fuzz/key.cpp
@@ -3,7 +3,6 @@
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #include <chainparams.h>
-#include <chainparamsbase.h>
 #include <key.h>
 #include <key_io.h>
 #include <outputtype.h>
@@ -17,6 +16,7 @@
 #include <script/standard.h>
 #include <streams.h>
 #include <test/fuzz/fuzz.h>
+#include <util/chaintype.h>
 #include <util/strencodings.h>
 
 #include <cassert>
@@ -28,7 +28,7 @@
 void initialize_key()
 {
     ECC_Start();
-    SelectParams(CBaseChainParams::REGTEST);
+    SelectParams(ChainType::REGTEST);
 }
 
 FUZZ_TARGET_INIT(key, initialize_key)
diff --git a/src/test/fuzz/key_io.cpp b/src/test/fuzz/key_io.cpp
index 29c6996365b..a1c587a75b2 100644
--- a/src/test/fuzz/key_io.cpp
+++ b/src/test/fuzz/key_io.cpp
@@ -5,6 +5,7 @@
 #include <chainparams.h>
 #include <key_io.h>
 #include <test/fuzz/fuzz.h>
+#include <util/chaintype.h>
 
 #include <cassert>
 #include <cstdint>
@@ -14,7 +15,7 @@
 void initialize_key_io()
 {
     ECC_Start();
-    SelectParams(CBaseChainParams::MAIN);
+    SelectParams(ChainType::MAIN);
 }
 
 FUZZ_TARGET_INIT(key_io, initialize_key_io)
diff --git a/src/test/fuzz/message.cpp b/src/test/fuzz/message.cpp
index 63e24aacdd6..8b7e3f11ccc 100644
--- a/src/test/fuzz/message.cpp
+++ b/src/test/fuzz/message.cpp
@@ -7,6 +7,7 @@
 #include <test/fuzz/FuzzedDataProvider.h>
 #include <test/fuzz/fuzz.h>
 #include <test/fuzz/util.h>
+#include <util/chaintype.h>
 #include <util/message.h>
 #include <util/strencodings.h>
 
@@ -19,7 +20,7 @@
 void initialize_message()
 {
     ECC_Start();
-    SelectParams(CBaseChainParams::REGTEST);
+    SelectParams(ChainType::REGTEST);
 }
 
 FUZZ_TARGET_INIT(message, initialize_message)
diff --git a/src/test/fuzz/net.cpp b/src/test/fuzz/net.cpp
index 13b4638688c..e090f130615 100644
--- a/src/test/fuzz/net.cpp
+++ b/src/test/fuzz/net.cpp
@@ -3,7 +3,6 @@
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #include <chainparams.h>
-#include <chainparamsbase.h>
 #include <net.h>
 #include <net_permissions.h>
 #include <netaddress.h>
@@ -16,6 +15,7 @@
 #include <test/util/net.h>
 #include <test/util/setup_common.h>
 #include <util/asmap.h>
+#include <util/chaintype.h>
 
 #include <cstdint>
 #include <optional>
@@ -24,7 +24,7 @@
 
 void initialize_net()
 {
-    static const auto testing_setup = MakeNoLogFileContext<>(CBaseChainParams::MAIN);
+    static const auto testing_setup = MakeNoLogFileContext<>(ChainType::MAIN);
 }
 
 FUZZ_TARGET_INIT(net, initialize_net)
diff --git a/src/test/fuzz/p2p_transport_serialization.cpp b/src/test/fuzz/p2p_transport_serialization.cpp
index 96254aa2223..ec3cdbff5a4 100644
--- a/src/test/fuzz/p2p_transport_serialization.cpp
+++ b/src/test/fuzz/p2p_transport_serialization.cpp
@@ -9,6 +9,7 @@
 #include <protocol.h>
 #include <test/fuzz/FuzzedDataProvider.h>
 #include <test/fuzz/fuzz.h>
+#include <util/chaintype.h>
 
 #include <cassert>
 #include <cstdint>
@@ -18,7 +19,7 @@
 
 void initialize_p2p_transport_serialization()
 {
-    SelectParams(CBaseChainParams::REGTEST);
+    SelectParams(ChainType::REGTEST);
 }
 
 FUZZ_TARGET_INIT(p2p_transport_serialization, initialize_p2p_transport_serialization)
diff --git a/src/test/fuzz/parse_univalue.cpp b/src/test/fuzz/parse_univalue.cpp
index 16486f6b96d..be15a38e929 100644
--- a/src/test/fuzz/parse_univalue.cpp
+++ b/src/test/fuzz/parse_univalue.cpp
@@ -7,13 +7,14 @@
 #include <rpc/client.h>
 #include <rpc/util.h>
 #include <test/fuzz/fuzz.h>
+#include <util/chaintype.h>
 
 #include <limits>
 #include <string>
 
 void initialize_parse_univalue()
 {
-    SelectParams(CBaseChainParams::REGTEST);
+    SelectParams(ChainType::REGTEST);
 }
 
 FUZZ_TARGET_INIT(parse_univalue, initialize_parse_univalue)
diff --git a/src/test/fuzz/pow.cpp b/src/test/fuzz/pow.cpp
index e5a3a6e68a7..6d584c9f10d 100644
--- a/src/test/fuzz/pow.cpp
+++ b/src/test/fuzz/pow.cpp
@@ -9,6 +9,7 @@
 #include <test/fuzz/FuzzedDataProvider.h>
 #include <test/fuzz/fuzz.h>
 #include <test/fuzz/util.h>
+#include <util/chaintype.h>
 #include <util/check.h>
 #include <util/overflow.h>
 
@@ -19,7 +20,7 @@
 
 void initialize_pow()
 {
-    SelectParams(CBaseChainParams::MAIN);
+    SelectParams(ChainType::MAIN);
 }
 
 FUZZ_TARGET_INIT(pow, initialize_pow)
diff --git a/src/test/fuzz/process_message.cpp b/src/test/fuzz/process_message.cpp
index 0a7924f2262..70dd1e17c5d 100644
--- a/src/test/fuzz/process_message.cpp
+++ b/src/test/fuzz/process_message.cpp
@@ -19,6 +19,7 @@
 #include <test/util/net.h>
 #include <test/util/setup_common.h>
 #include <test/util/validation.h>
+#include <util/chaintype.h>
 #include <validationinterface.h>
 #include <version.h>
 
@@ -57,7 +58,7 @@ void initialize_process_message()
     Assert(GetNumMsgTypes() == getAllNetMessageTypes().size()); // If this fails, add or remove the message type below
 
     static const auto testing_setup = MakeNoLogFileContext<const TestingSetup>(
-            /*chain_name=*/CBaseChainParams::REGTEST,
+            /*chain_type=*/ChainType::REGTEST,
             /*extra_args=*/{"-txreconciliation"});
     g_setup = testing_setup.get();
     for (int i = 0; i < 2 * COINBASE_MATURITY; i++) {
diff --git a/src/test/fuzz/process_messages.cpp b/src/test/fuzz/process_messages.cpp
index 96339743ba4..68d4e02a260 100644
--- a/src/test/fuzz/process_messages.cpp
+++ b/src/test/fuzz/process_messages.cpp
@@ -24,7 +24,7 @@ const TestingSetup* g_setup;
 void initialize_process_messages()
 {
     static const auto testing_setup = MakeNoLogFileContext<const TestingSetup>(
-            /*chain_name=*/CBaseChainParams::REGTEST,
+            /*chain_type=*/ChainType::REGTEST,
             /*extra_args=*/{"-txreconciliation"});
     g_setup = testing_setup.get();
     for (int i = 0; i < 2 * COINBASE_MATURITY; i++) {
diff --git a/src/test/fuzz/rpc.cpp b/src/test/fuzz/rpc.cpp
index 1c6140c66a0..e1f378ceff8 100644
--- a/src/test/fuzz/rpc.cpp
+++ b/src/test/fuzz/rpc.cpp
@@ -23,6 +23,7 @@
 #include <test/util/setup_common.h>
 #include <tinyformat.h>
 #include <univalue.h>
+#include <util/chaintype.h>
 #include <util/strencodings.h>
 #include <util/string.h>
 #include <util/time.h>
@@ -37,7 +38,7 @@
 
 namespace {
 struct RPCFuzzTestingSetup : public TestingSetup {
-    RPCFuzzTestingSetup(const std::string& chain_name, const std::vector<const char*>& extra_args) : TestingSetup{chain_name, extra_args}
+    RPCFuzzTestingSetup(const ChainType chain_type, const std::vector<const char*>& extra_args) : TestingSetup{chain_type, extra_args}
     {
     }
 
diff --git a/src/test/fuzz/script.cpp b/src/test/fuzz/script.cpp
index 1037dd934ae..8a88c1107a9 100644
--- a/src/test/fuzz/script.cpp
+++ b/src/test/fuzz/script.cpp
@@ -22,6 +22,7 @@
 #include <test/fuzz/fuzz.h>
 #include <test/fuzz/util.h>
 #include <univalue.h>
+#include <util/chaintype.h>
 
 #include <algorithm>
 #include <cassert>
@@ -32,7 +33,7 @@
 
 void initialize_script()
 {
-    SelectParams(CBaseChainParams::REGTEST);
+    SelectParams(ChainType::REGTEST);
 }
 
 FUZZ_TARGET_INIT(script, initialize_script)
diff --git a/src/test/fuzz/script_format.cpp b/src/test/fuzz/script_format.cpp
index 9186746bcf7..5aa0ea58ffe 100644
--- a/src/test/fuzz/script_format.cpp
+++ b/src/test/fuzz/script_format.cpp
@@ -11,10 +11,11 @@
 #include <test/fuzz/fuzz.h>
 #include <test/fuzz/util.h>
 #include <univalue.h>
+#include <util/chaintype.h>
 
 void initialize_script_format()
 {
-    SelectParams(CBaseChainParams::REGTEST);
+    SelectParams(ChainType::REGTEST);
 }
 
 FUZZ_TARGET_INIT(script_format, initialize_script_format)
diff --git a/src/test/fuzz/script_sigcache.cpp b/src/test/fuzz/script_sigcache.cpp
index de895cc69ca..f3329879878 100644
--- a/src/test/fuzz/script_sigcache.cpp
+++ b/src/test/fuzz/script_sigcache.cpp
@@ -3,7 +3,6 @@
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #include <chainparams.h>
-#include <chainparamsbase.h>
 #include <key.h>
 #include <pubkey.h>
 #include <script/sigcache.h>
diff --git a/src/test/fuzz/script_sign.cpp b/src/test/fuzz/script_sign.cpp
index c78c22e6cc0..8b62daf1624 100644
--- a/src/test/fuzz/script_sign.cpp
+++ b/src/test/fuzz/script_sign.cpp
@@ -3,7 +3,6 @@
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #include <chainparams.h>
-#include <chainparamsbase.h>
 #include <key.h>
 #include <psbt.h>
 #include <pubkey.h>
@@ -14,6 +13,7 @@
 #include <test/fuzz/FuzzedDataProvider.h>
 #include <test/fuzz/fuzz.h>
 #include <test/fuzz/util.h>
+#include <util/chaintype.h>
 #include <util/translation.h>
 
 #include <cassert>
@@ -27,7 +27,7 @@
 void initialize_script_sign()
 {
     ECC_Start();
-    SelectParams(CBaseChainParams::REGTEST);
+    SelectParams(ChainType::REGTEST);
 }
 
 FUZZ_TARGET_INIT(script_sign, initialize_script_sign)
diff --git a/src/test/fuzz/signet.cpp b/src/test/fuzz/signet.cpp
index 303dcf13e39..e9af93c6391 100644
--- a/src/test/fuzz/signet.cpp
+++ b/src/test/fuzz/signet.cpp
@@ -11,6 +11,7 @@
 #include <test/fuzz/fuzz.h>
 #include <test/fuzz/util.h>
 #include <test/util/setup_common.h>
+#include <util/chaintype.h>
 
 #include <cstdint>
 #include <optional>
@@ -18,7 +19,7 @@
 
 void initialize_signet()
 {
-    static const auto testing_setup = MakeNoLogFileContext<>(CBaseChainParams::SIGNET);
+    static const auto testing_setup = MakeNoLogFileContext<>(ChainType::SIGNET);
 }
 
 FUZZ_TARGET_INIT(signet, initialize_signet)
diff --git a/src/test/fuzz/system.cpp b/src/test/fuzz/system.cpp
index 935f0c21e12..04cbbe52cb7 100644
--- a/src/test/fuzz/system.cpp
+++ b/src/test/fuzz/system.cpp
@@ -108,7 +108,7 @@ FUZZ_TARGET_INIT(system, initialize_system)
     (void)args_manager.GetArgs(s1);
     (void)args_manager.GetBoolArg(s1, b);
     try {
-        (void)args_manager.GetChainName();
+        (void)args_manager.GetChainTypeString();
     } catch (const std::runtime_error&) {
     }
     (void)args_manager.GetHelpMessage();
diff --git a/src/test/fuzz/transaction.cpp b/src/test/fuzz/transaction.cpp
index bacb178b446..7035c53d137 100644
--- a/src/test/fuzz/transaction.cpp
+++ b/src/test/fuzz/transaction.cpp
@@ -15,6 +15,7 @@
 #include <streams.h>
 #include <test/fuzz/fuzz.h>
 #include <univalue.h>
+#include <util/chaintype.h>
 #include <util/rbf.h>
 #include <validation.h>
 #include <version.h>
@@ -23,7 +24,7 @@
 
 void initialize_transaction()
 {
-    SelectParams(CBaseChainParams::REGTEST);
+    SelectParams(ChainType::REGTEST);
 }
 
 FUZZ_TARGET_INIT(transaction, initialize_transaction)
diff --git a/src/test/fuzz/util.h b/src/test/fuzz/util.h
index c14f6330292..5f2aff08dae 100644
--- a/src/test/fuzz/util.h
+++ b/src/test/fuzz/util.h
@@ -6,7 +6,6 @@
 #define BITCOIN_TEST_FUZZ_UTIL_H
 
 #include <arith_uint256.h>
-#include <chainparamsbase.h>
 #include <coins.h>
 #include <compat/compat.h>
 #include <consensus/amount.h>
diff --git a/src/test/fuzz/utxo_snapshot.cpp b/src/test/fuzz/utxo_snapshot.cpp
index be34906025e..b4ef0c7a3e6 100644
--- a/src/test/fuzz/utxo_snapshot.cpp
+++ b/src/test/fuzz/utxo_snapshot.cpp
@@ -10,6 +10,7 @@
 #include <test/fuzz/util.h>
 #include <test/util/mining.h>
 #include <test/util/setup_common.h>
+#include <util/chaintype.h>
 #include <util/fs.h>
 #include <validation.h>
 #include <validationinterface.h>
@@ -22,7 +23,7 @@ const std::vector<std::shared_ptr<CBlock>>* g_chain;
 
 void initialize_chain()
 {
-    const auto params{CreateChainParams(ArgsManager{}, CBaseChainParams::REGTEST)};
+    const auto params{CreateChainParams(ArgsManager{}, ChainType::REGTEST)};
     static const auto chain{CreateBlockChain(2 * COINBASE_MATURITY, *params)};
     g_chain = &chain;
 }
diff --git a/src/test/fuzz/utxo_total_supply.cpp b/src/test/fuzz/utxo_total_supply.cpp
index 7813b7854b1..19f41880f42 100644
--- a/src/test/fuzz/utxo_total_supply.cpp
+++ b/src/test/fuzz/utxo_total_supply.cpp
@@ -14,6 +14,7 @@
 #include <test/fuzz/util.h>
 #include <test/util/mining.h>
 #include <test/util/setup_common.h>
+#include <util/chaintype.h>
 #include <validation.h>
 #include <version.h>
 
@@ -21,7 +22,7 @@ FUZZ_TARGET(utxo_total_supply)
 {
     /** The testing setup that creates a chainman only (no chainstate) */
     ChainTestingSetup test_setup{
-        CBaseChainParams::REGTEST,
+        ChainType::REGTEST,
         {
             "-testactivationheight=bip34@2",
         },
diff --git a/src/test/fuzz/validation_load_mempool.cpp b/src/test/fuzz/validation_load_mempool.cpp
index 817593cf6ef..4e2ca6d9030 100644
--- a/src/test/fuzz/validation_load_mempool.cpp
+++ b/src/test/fuzz/validation_load_mempool.cpp
@@ -4,7 +4,6 @@
 
 #include <kernel/mempool_persist.h>
 
-#include <chainparamsbase.h>
 #include <node/mempool_args.h>
 #include <node/mempool_persist_args.h>
 #include <test/fuzz/FuzzedDataProvider.h>
diff --git a/src/test/fuzz/versionbits.cpp b/src/test/fuzz/versionbits.cpp
index e6a19d6e917..b3df4dadd21 100644
--- a/src/test/fuzz/versionbits.cpp
+++ b/src/test/fuzz/versionbits.cpp
@@ -7,6 +7,7 @@
 #include <common/args.h>
 #include <consensus/params.h>
 #include <primitives/block.h>
+#include <util/chaintype.h>
 #include <versionbits.h>
 
 #include <test/fuzz/FuzzedDataProvider.h>
@@ -104,7 +105,7 @@ std::unique_ptr<const CChainParams> g_params;
 void initialize()
 {
     // this is actually comparatively slow, so only do it once
-    g_params = CreateChainParams(ArgsManager{}, CBaseChainParams::MAIN);
+    g_params = CreateChainParams(ArgsManager{}, ChainType::MAIN);
     assert(g_params != nullptr);
 }
 
diff --git a/src/test/key_io_tests.cpp b/src/test/key_io_tests.cpp
index a400afee716..fa3430fc896 100644
--- a/src/test/key_io_tests.cpp
+++ b/src/test/key_io_tests.cpp
@@ -10,6 +10,7 @@
 #include <script/script.h>
 #include <test/util/json.h>
 #include <test/util/setup_common.h>
+#include <util/chaintype.h>
 #include <util/strencodings.h>
 
 #include <boost/test/unit_test.hpp>
@@ -24,7 +25,7 @@ BOOST_AUTO_TEST_CASE(key_io_valid_parse)
     UniValue tests = read_json(std::string(json_tests::key_io_valid, json_tests::key_io_valid + sizeof(json_tests::key_io_valid)));
     CKey privkey;
     CTxDestination destination;
-    SelectParams(CBaseChainParams::MAIN);
+    SelectParams(ChainType::MAIN);
 
     for (unsigned int idx = 0; idx < tests.size(); idx++) {
         const UniValue& test = tests[idx];
@@ -37,7 +38,7 @@ BOOST_AUTO_TEST_CASE(key_io_valid_parse)
         const std::vector<std::byte> exp_payload{ParseHex<std::byte>(test[1].get_str())};
         const UniValue &metadata = test[2].get_obj();
         bool isPrivkey = find_value(metadata, "isPrivkey").get_bool();
-        SelectParams(find_value(metadata, "chain").get_str());
+        SelectParams(ChainTypeFromString(find_value(metadata, "chain").get_str()).value());
         bool try_case_flip = find_value(metadata, "tryCaseFlip").isNull() ? false : find_value(metadata, "tryCaseFlip").get_bool();
         if (isPrivkey) {
             bool isCompressed = find_value(metadata, "isCompressed").get_bool();
@@ -96,7 +97,7 @@ BOOST_AUTO_TEST_CASE(key_io_valid_gen)
         std::vector<unsigned char> exp_payload = ParseHex(test[1].get_str());
         const UniValue &metadata = test[2].get_obj();
         bool isPrivkey = find_value(metadata, "isPrivkey").get_bool();
-        SelectParams(find_value(metadata, "chain").get_str());
+        SelectParams(ChainTypeFromString(find_value(metadata, "chain").get_str()).value());
         if (isPrivkey) {
             bool isCompressed = find_value(metadata, "isCompressed").get_bool();
             CKey key;
@@ -113,7 +114,7 @@ BOOST_AUTO_TEST_CASE(key_io_valid_gen)
         }
     }
 
-    SelectParams(CBaseChainParams::MAIN);
+    SelectParams(ChainType::MAIN);
 }
 
 
@@ -135,7 +136,7 @@ BOOST_AUTO_TEST_CASE(key_io_invalid)
         std::string exp_base58string = test[0].get_str();
 
         // must be invalid as public and as private key
-        for (const auto& chain : { CBaseChainParams::MAIN, CBaseChainParams::TESTNET, CBaseChainParams::SIGNET, CBaseChainParams::REGTEST }) {
+        for (const auto& chain : {ChainType::MAIN, ChainType::TESTNET, ChainType::SIGNET, ChainType::REGTEST}) {
             SelectParams(chain);
             destination = DecodeDestination(exp_base58string);
             BOOST_CHECK_MESSAGE(!IsValidDestination(destination), "IsValid pubkey in mainnet:" + strTest);
diff --git a/src/test/pow_tests.cpp b/src/test/pow_tests.cpp
index addc925babc..5bd14f22c6f 100644
--- a/src/test/pow_tests.cpp
+++ b/src/test/pow_tests.cpp
@@ -7,6 +7,7 @@
 #include <pow.h>
 #include <test/util/random.h>
 #include <test/util/setup_common.h>
+#include <util/chaintype.h>
 
 #include <boost/test/unit_test.hpp>
 
@@ -15,7 +16,7 @@ BOOST_FIXTURE_TEST_SUITE(pow_tests, BasicTestingSetup)
 /* Test calculation of next difficulty target with no constraints applying */
 BOOST_AUTO_TEST_CASE(get_next_work)
 {
-    const auto chainParams = CreateChainParams(*m_node.args, CBaseChainParams::MAIN);
+    const auto chainParams = CreateChainParams(*m_node.args, ChainType::MAIN);
     int64_t nLastRetargetTime = 1261130161; // Block #30240
     CBlockIndex pindexLast;
     pindexLast.nHeight = 32255;
@@ -34,7 +35,7 @@ BOOST_AUTO_TEST_CASE(get_next_work)
 /* Test the constraint on the upper bound for next work */
 BOOST_AUTO_TEST_CASE(get_next_work_pow_limit)
 {
-    const auto chainParams = CreateChainParams(*m_node.args, CBaseChainParams::MAIN);
+    const auto chainParams = CreateChainParams(*m_node.args, ChainType::MAIN);
     int64_t nLastRetargetTime = 1231006505; // Block #0
     CBlockIndex pindexLast;
     pindexLast.nHeight = 2015;
@@ -48,7 +49,7 @@ BOOST_AUTO_TEST_CASE(get_next_work_pow_limit)
 /* Test the constraint on the lower bound for actual time taken */
 BOOST_AUTO_TEST_CASE(get_next_work_lower_limit_actual)
 {
-    const auto chainParams = CreateChainParams(*m_node.args, CBaseChainParams::MAIN);
+    const auto chainParams = CreateChainParams(*m_node.args, ChainType::MAIN);
     int64_t nLastRetargetTime = 1279008237; // Block #66528
     CBlockIndex pindexLast;
     pindexLast.nHeight = 68543;
@@ -65,7 +66,7 @@ BOOST_AUTO_TEST_CASE(get_next_work_lower_limit_actual)
 /* Test the constraint on the upper bound for actual time taken */
 BOOST_AUTO_TEST_CASE(get_next_work_upper_limit_actual)
 {
-    const auto chainParams = CreateChainParams(*m_node.args, CBaseChainParams::MAIN);
+    const auto chainParams = CreateChainParams(*m_node.args, ChainType::MAIN);
     int64_t nLastRetargetTime = 1263163443; // NOTE: Not an actual block time
     CBlockIndex pindexLast;
     pindexLast.nHeight = 46367;
@@ -81,7 +82,7 @@ BOOST_AUTO_TEST_CASE(get_next_work_upper_limit_actual)
 
 BOOST_AUTO_TEST_CASE(CheckProofOfWork_test_negative_target)
 {
-    const auto consensus = CreateChainParams(*m_node.args, CBaseChainParams::MAIN)->GetConsensus();
+    const auto consensus = CreateChainParams(*m_node.args, ChainType::MAIN)->GetConsensus();
     uint256 hash;
     unsigned int nBits;
     nBits = UintToArith256(consensus.powLimit).GetCompact(true);
@@ -91,7 +92,7 @@ BOOST_AUTO_TEST_CASE(CheckProofOfWork_test_negative_target)
 
 BOOST_AUTO_TEST_CASE(CheckProofOfWork_test_overflow_target)
 {
-    const auto consensus = CreateChainParams(*m_node.args, CBaseChainParams::MAIN)->GetConsensus();
+    const auto consensus = CreateChainParams(*m_node.args, ChainType::MAIN)->GetConsensus();
     uint256 hash;
     unsigned int nBits{~0x00800000U};
     hash.SetHex("0x1");
@@ -100,7 +101,7 @@ BOOST_AUTO_TEST_CASE(CheckProofOfWork_test_overflow_target)
 
 BOOST_AUTO_TEST_CASE(CheckProofOfWork_test_too_easy_target)
 {
-    const auto consensus = CreateChainParams(*m_node.args, CBaseChainParams::MAIN)->GetConsensus();
+    const auto consensus = CreateChainParams(*m_node.args, ChainType::MAIN)->GetConsensus();
     uint256 hash;
     unsigned int nBits;
     arith_uint256 nBits_arith = UintToArith256(consensus.powLimit);
@@ -112,7 +113,7 @@ BOOST_AUTO_TEST_CASE(CheckProofOfWork_test_too_easy_target)
 
 BOOST_AUTO_TEST_CASE(CheckProofOfWork_test_biger_hash_than_target)
 {
-    const auto consensus = CreateChainParams(*m_node.args, CBaseChainParams::MAIN)->GetConsensus();
+    const auto consensus = CreateChainParams(*m_node.args, ChainType::MAIN)->GetConsensus();
     uint256 hash;
     unsigned int nBits;
     arith_uint256 hash_arith = UintToArith256(consensus.powLimit);
@@ -124,7 +125,7 @@ BOOST_AUTO_TEST_CASE(CheckProofOfWork_test_biger_hash_than_target)
 
 BOOST_AUTO_TEST_CASE(CheckProofOfWork_test_zero_target)
 {
-    const auto consensus = CreateChainParams(*m_node.args, CBaseChainParams::MAIN)->GetConsensus();
+    const auto consensus = CreateChainParams(*m_node.args, ChainType::MAIN)->GetConsensus();
     uint256 hash;
     unsigned int nBits;
     arith_uint256 hash_arith{0};
@@ -135,7 +136,7 @@ BOOST_AUTO_TEST_CASE(CheckProofOfWork_test_zero_target)
 
 BOOST_AUTO_TEST_CASE(GetBlockProofEquivalentTime_test)
 {
-    const auto chainParams = CreateChainParams(*m_node.args, CBaseChainParams::MAIN);
+    const auto chainParams = CreateChainParams(*m_node.args, ChainType::MAIN);
     std::vector<CBlockIndex> blocks(10000);
     for (int i = 0; i < 10000; i++) {
         blocks[i].pprev = i ? &blocks[i - 1] : nullptr;
@@ -155,9 +156,9 @@ BOOST_AUTO_TEST_CASE(GetBlockProofEquivalentTime_test)
     }
 }
 
-void sanity_check_chainparams(const ArgsManager& args, std::string chainName)
+void sanity_check_chainparams(const ArgsManager& args, ChainType chain_type)
 {
-    const auto chainParams = CreateChainParams(args, chainName);
+    const auto chainParams = CreateChainParams(args, chain_type);
     const auto consensus = chainParams->GetConsensus();
 
     // hash genesis is correct
@@ -184,22 +185,22 @@ void sanity_check_chainparams(const ArgsManager& args, std::string chainName)
 
 BOOST_AUTO_TEST_CASE(ChainParams_MAIN_sanity)
 {
-    sanity_check_chainparams(*m_node.args, CBaseChainParams::MAIN);
+    sanity_check_chainparams(*m_node.args, ChainType::MAIN);
 }
 
 BOOST_AUTO_TEST_CASE(ChainParams_REGTEST_sanity)
 {
-    sanity_check_chainparams(*m_node.args, CBaseChainParams::REGTEST);
+    sanity_check_chainparams(*m_node.args, ChainType::REGTEST);
 }
 
 BOOST_AUTO_TEST_CASE(ChainParams_TESTNET_sanity)
 {
-    sanity_check_chainparams(*m_node.args, CBaseChainParams::TESTNET);
+    sanity_check_chainparams(*m_node.args, ChainType::TESTNET);
 }
 
 BOOST_AUTO_TEST_CASE(ChainParams_SIGNET_sanity)
 {
-    sanity_check_chainparams(*m_node.args, CBaseChainParams::SIGNET);
+    sanity_check_chainparams(*m_node.args, ChainType::SIGNET);
 }
 
 BOOST_AUTO_TEST_SUITE_END()
diff --git a/src/test/settings_tests.cpp b/src/test/settings_tests.cpp
index 604eb48df60..fff84d24f06 100644
--- a/src/test/settings_tests.cpp
+++ b/src/test/settings_tests.cpp
@@ -6,12 +6,12 @@
 
 #include <test/util/setup_common.h>
 #include <test/util/str.h>
-#include <util/fs.h>
-
 
 #include <boost/test/unit_test.hpp>
 #include <common/args.h>
 #include <univalue.h>
+#include <util/chaintype.h>
+#include <util/fs.h>
 #include <util/strencodings.h>
 #include <util/string.h>
 
@@ -190,7 +190,7 @@ BOOST_FIXTURE_TEST_CASE(Merge, MergeTestingSetup)
         if (!out_file) throw std::system_error(errno, std::generic_category(), "fopen failed");
     }
 
-    const std::string& network = CBaseChainParams::MAIN;
+    const std::string& network = ChainTypeToString(ChainType::MAIN);
     ForEachMergeSetup([&](const ActionList& arg_actions, const ActionList& conf_actions, bool force_set,
                           bool ignore_default_section_config) {
         std::string desc;
@@ -225,7 +225,7 @@ BOOST_FIXTURE_TEST_CASE(Merge, MergeTestingSetup)
         }
 
         desc += " || ";
-        desc += GetSetting(settings, network, name, ignore_default_section_config, /*ignore_nonpersistent=*/false, /*get_chain_name=*/false).write();
+        desc += GetSetting(settings, network, name, ignore_default_section_config, /*ignore_nonpersistent=*/false, /*get_chain_type=*/false).write();
         desc += " |";
         for (const auto& s : GetSettingsList(settings, network, name, ignore_default_section_config)) {
             desc += " ";
diff --git a/src/test/txvalidationcache_tests.cpp b/src/test/txvalidationcache_tests.cpp
index 8cdea3890e0..8f8628169f1 100644
--- a/src/test/txvalidationcache_tests.cpp
+++ b/src/test/txvalidationcache_tests.cpp
@@ -9,13 +9,14 @@
 #include <script/standard.h>
 #include <test/util/setup_common.h>
 #include <txmempool.h>
+#include <util/chaintype.h>
 #include <validation.h>
 
 #include <boost/test/unit_test.hpp>
 
 struct Dersig100Setup : public TestChain100Setup {
     Dersig100Setup()
-        : TestChain100Setup{CBaseChainParams::REGTEST, {"-testactivationheight=dersig@102"}} {}
+        : TestChain100Setup{ChainType::REGTEST, {"-testactivationheight=dersig@102"}} {}
 };
 
 bool CheckInputScripts(const CTransaction& tx, TxValidationState& state,
diff --git a/src/test/util/setup_common.cpp b/src/test/util/setup_common.cpp
index b3072a8295c..642350b0335 100644
--- a/src/test/util/setup_common.cpp
+++ b/src/test/util/setup_common.cpp
@@ -42,6 +42,7 @@
 #include <timedata.h>
 #include <txdb.h>
 #include <txmempool.h>
+#include <util/chaintype.h>
 #include <util/strencodings.h>
 #include <util/string.h>
 #include <util/system.h>
@@ -98,7 +99,7 @@ std::ostream& operator<<(std::ostream& os, const uint256& num)
     return os;
 }
 
-BasicTestingSetup::BasicTestingSetup(const std::string& chainName, const std::vector<const char*>& extra_args)
+BasicTestingSetup::BasicTestingSetup(const ChainType chainType, const std::vector<const char*>& extra_args)
     : m_path_root{fs::temp_directory_path() / "test_common_" PACKAGE_NAME / g_insecure_rand_ctx_temp_path.rand256().ToString()},
       m_args{}
 {
@@ -132,7 +133,7 @@ BasicTestingSetup::BasicTestingSetup(const std::string& chainName, const std::ve
             throw std::runtime_error{error};
         }
     }
-    SelectParams(chainName);
+    SelectParams(chainType);
     SeedInsecureRand();
     if (G_TEST_LOG_FUN) LogInstance().PushBackCallback(G_TEST_LOG_FUN);
     InitLogging(*m_node.args);
@@ -163,8 +164,8 @@ BasicTestingSetup::~BasicTestingSetup()
     gArgs.ClearArgs();
 }
 
-ChainTestingSetup::ChainTestingSetup(const std::string& chainName, const std::vector<const char*>& extra_args)
-    : BasicTestingSetup(chainName, extra_args)
+ChainTestingSetup::ChainTestingSetup(const ChainType chainType, const std::vector<const char*>& extra_args)
+    : BasicTestingSetup(chainType, extra_args)
 {
     const CChainParams& chainparams = Params();
 
@@ -240,11 +241,11 @@ void ChainTestingSetup::LoadVerifyActivateChainstate()
 }
 
 TestingSetup::TestingSetup(
-    const std::string& chainName,
+    const ChainType chainType,
     const std::vector<const char*>& extra_args,
     const bool coins_db_in_memory,
     const bool block_tree_db_in_memory)
-    : ChainTestingSetup(chainName, extra_args)
+    : ChainTestingSetup(chainType, extra_args)
 {
     m_coins_db_in_memory = coins_db_in_memory;
     m_block_tree_db_in_memory = block_tree_db_in_memory;
@@ -271,11 +272,11 @@ TestingSetup::TestingSetup(
 }
 
 TestChain100Setup::TestChain100Setup(
-        const std::string& chain_name,
+        const ChainType chain_type,
         const std::vector<const char*>& extra_args,
         const bool coins_db_in_memory,
         const bool block_tree_db_in_memory)
-    : TestingSetup{CBaseChainParams::REGTEST, extra_args, coins_db_in_memory, block_tree_db_in_memory}
+    : TestingSetup{ChainType::REGTEST, extra_args, coins_db_in_memory, block_tree_db_in_memory}
 {
     SetMockTime(1598887952);
     constexpr std::array<unsigned char, 32> vchKey = {
diff --git a/src/test/util/setup_common.h b/src/test/util/setup_common.h
index 62e025e819b..bd5a81be45b 100644
--- a/src/test/util/setup_common.h
+++ b/src/test/util/setup_common.h
@@ -5,7 +5,6 @@
 #ifndef BITCOIN_TEST_UTIL_SETUP_COMMON_H
 #define BITCOIN_TEST_UTIL_SETUP_COMMON_H
 
-#include <chainparamsbase.h>
 #include <common/args.h>
 #include <key.h>
 #include <node/caches.h>
@@ -14,6 +13,7 @@
 #include <pubkey.h>
 #include <random.h>
 #include <stdexcept>
+#include <util/chaintype.h>
 #include <util/check.h>
 #include <util/fs.h>
 #include <util/string.h>
@@ -80,7 +80,7 @@ static constexpr CAmount CENT{1000000};
 struct BasicTestingSetup {
     node::NodeContext m_node; // keep as first member to be destructed last
 
-    explicit BasicTestingSetup(const std::string& chainName = CBaseChainParams::MAIN, const std::vector<const char*>& extra_args = {});
+    explicit BasicTestingSetup(const ChainType chainType = ChainType::MAIN, const std::vector<const char*>& extra_args = {});
     ~BasicTestingSetup();
 
     const fs::path m_path_root;
@@ -96,7 +96,7 @@ struct ChainTestingSetup : public BasicTestingSetup {
     bool m_coins_db_in_memory{true};
     bool m_block_tree_db_in_memory{true};
 
-    explicit ChainTestingSetup(const std::string& chainName = CBaseChainParams::MAIN, const std::vector<const char*>& extra_args = {});
+    explicit ChainTestingSetup(const ChainType chainType = ChainType::MAIN, const std::vector<const char*>& extra_args = {});
     ~ChainTestingSetup();
 
     // Supplies a chainstate, if one is needed
@@ -107,7 +107,7 @@ struct ChainTestingSetup : public BasicTestingSetup {
  */
 struct TestingSetup : public ChainTestingSetup {
     explicit TestingSetup(
-        const std::string& chainName = CBaseChainParams::MAIN,
+        const ChainType chainType = ChainType::MAIN,
         const std::vector<const char*>& extra_args = {},
         const bool coins_db_in_memory = true,
         const bool block_tree_db_in_memory = true);
@@ -116,7 +116,7 @@ struct TestingSetup : public ChainTestingSetup {
 /** Identical to TestingSetup, but chain set to regtest */
 struct RegTestingSetup : public TestingSetup {
     RegTestingSetup()
-        : TestingSetup{CBaseChainParams::REGTEST} {}
+        : TestingSetup{ChainType::REGTEST} {}
 };
 
 class CBlock;
@@ -128,7 +128,7 @@ class CScript;
  */
 struct TestChain100Setup : public TestingSetup {
     TestChain100Setup(
-        const std::string& chain_name = CBaseChainParams::REGTEST,
+        const ChainType chain_type = ChainType::REGTEST,
         const std::vector<const char*>& extra_args = {},
         const bool coins_db_in_memory = true,
         const bool block_tree_db_in_memory = true);
@@ -206,7 +206,7 @@ struct TestChain100Setup : public TestingSetup {
  * be used in "hot loops", for example fuzzing or benchmarking.
  */
 template <class T = const BasicTestingSetup>
-std::unique_ptr<T> MakeNoLogFileContext(const std::string& chain_name = CBaseChainParams::REGTEST, const std::vector<const char*>& extra_args = {})
+std::unique_ptr<T> MakeNoLogFileContext(const ChainType chain_type = ChainType::REGTEST, const std::vector<const char*>& extra_args = {})
 {
     const std::vector<const char*> arguments = Cat(
         {
@@ -215,7 +215,7 @@ std::unique_ptr<T> MakeNoLogFileContext(const std::string& chain_name = CBaseCha
         },
         extra_args);
 
-    return std::make_unique<T>(chain_name, arguments);
+    return std::make_unique<T>(chain_type, arguments);
 }
 
 CBlock getBlock13b8a();
diff --git a/src/test/validation_tests.cpp b/src/test/validation_tests.cpp
index 0b4c491615c..d00f2ff4d1c 100644
--- a/src/test/validation_tests.cpp
+++ b/src/test/validation_tests.cpp
@@ -7,6 +7,7 @@
 #include <net.h>
 #include <signet.h>
 #include <uint256.h>
+#include <util/chaintype.h>
 #include <validation.h>
 
 #include <test/util/setup_common.h>
@@ -41,7 +42,7 @@ static void TestBlockSubsidyHalvings(int nSubsidyHalvingInterval)
 
 BOOST_AUTO_TEST_CASE(block_subsidy_test)
 {
-    const auto chainParams = CreateChainParams(*m_node.args, CBaseChainParams::MAIN);
+    const auto chainParams = CreateChainParams(*m_node.args, ChainType::MAIN);
     TestBlockSubsidyHalvings(chainParams->GetConsensus()); // As in main
     TestBlockSubsidyHalvings(150); // As in regtest
     TestBlockSubsidyHalvings(1000); // Just another interval
@@ -49,7 +50,7 @@ BOOST_AUTO_TEST_CASE(block_subsidy_test)
 
 BOOST_AUTO_TEST_CASE(subsidy_limit_test)
 {
-    const auto chainParams = CreateChainParams(*m_node.args, CBaseChainParams::MAIN);
+    const auto chainParams = CreateChainParams(*m_node.args, ChainType::MAIN);
     CAmount nSum = 0;
     for (int nHeight = 0; nHeight < 14000000; nHeight += 1000) {
         CAmount nSubsidy = GetBlockSubsidy(nHeight, chainParams->GetConsensus());
@@ -64,7 +65,7 @@ BOOST_AUTO_TEST_CASE(signet_parse_tests)
 {
     ArgsManager signet_argsman;
     signet_argsman.ForceSetArg("-signetchallenge", "51"); // set challenge to OP_TRUE
-    const auto signet_params = CreateChainParams(signet_argsman, CBaseChainParams::SIGNET);
+    const auto signet_params = CreateChainParams(signet_argsman, ChainType::SIGNET);
     CBlock block;
     BOOST_CHECK(signet_params->GetConsensus().signet_challenge == std::vector<uint8_t>{OP_TRUE});
     CScript challenge{OP_TRUE};
@@ -124,7 +125,7 @@ BOOST_AUTO_TEST_CASE(signet_parse_tests)
 //! Test retrieval of valid assumeutxo values.
 BOOST_AUTO_TEST_CASE(test_assumeutxo)
 {
-    const auto params = CreateChainParams(*m_node.args, CBaseChainParams::REGTEST);
+    const auto params = CreateChainParams(*m_node.args, ChainType::REGTEST);
 
     // These heights don't have assumeutxo configurations associated, per the contents
     // of kernel/chainparams.cpp.
diff --git a/src/test/versionbits_tests.cpp b/src/test/versionbits_tests.cpp
index 80c00036e75..9e699927528 100644
--- a/src/test/versionbits_tests.cpp
+++ b/src/test/versionbits_tests.cpp
@@ -7,6 +7,7 @@
 #include <consensus/params.h>
 #include <test/util/random.h>
 #include <test/util/setup_common.h>
+#include <util/chaintype.h>
 #include <versionbits.h>
 
 #include <boost/test/unit_test.hpp>
@@ -418,8 +419,8 @@ BOOST_AUTO_TEST_CASE(versionbits_computeblockversion)
 
     // check that any deployment on any chain can conceivably reach both
     // ACTIVE and FAILED states in roughly the way we expect
-    for (const auto& chain_name : {CBaseChainParams::MAIN, CBaseChainParams::TESTNET, CBaseChainParams::SIGNET, CBaseChainParams::REGTEST}) {
-        const auto chainParams = CreateChainParams(*m_node.args, chain_name);
+    for (const auto& chain_type: {ChainType::MAIN, ChainType::TESTNET, ChainType::SIGNET, ChainType::REGTEST}) {
+        const auto chainParams = CreateChainParams(*m_node.args, chain_type);
         uint32_t chain_all_vbits{0};
         for (int i = 0; i < (int)Consensus::MAX_VERSION_BITS_DEPLOYMENTS; ++i) {
             const auto dep = static_cast<Consensus::DeploymentPos>(i);
@@ -440,7 +441,7 @@ BOOST_AUTO_TEST_CASE(versionbits_computeblockversion)
         // deployment that's not always/never active
         ArgsManager args;
         args.ForceSetArg("-vbparams", "testdummy:1199145601:1230767999"); // January 1, 2008 - December 31, 2008
-        const auto chainParams = CreateChainParams(args, CBaseChainParams::REGTEST);
+        const auto chainParams = CreateChainParams(args, ChainType::REGTEST);
         check_computeblockversion(vbcache, chainParams->GetConsensus(), Consensus::DEPLOYMENT_TESTDUMMY);
     }
 
@@ -450,7 +451,7 @@ BOOST_AUTO_TEST_CASE(versionbits_computeblockversion)
         // live deployment
         ArgsManager args;
         args.ForceSetArg("-vbparams", "testdummy:1199145601:1230767999:403200"); // January 1, 2008 - December 31, 2008, min act height 403200
-        const auto chainParams = CreateChainParams(args, CBaseChainParams::REGTEST);
+        const auto chainParams = CreateChainParams(args, ChainType::REGTEST);
         check_computeblockversion(vbcache, chainParams->GetConsensus(), Consensus::DEPLOYMENT_TESTDUMMY);
     }
 }
diff --git a/src/util/chaintype.cpp b/src/util/chaintype.cpp
new file mode 100644
index 00000000000..8a199e352a4
--- /dev/null
+++ b/src/util/chaintype.cpp
@@ -0,0 +1,39 @@
+// Copyright (c) 2023 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 <util/chaintype.h>
+
+#include <cassert>
+#include <optional>
+#include <string>
+
+std::string ChainTypeToString(ChainType chain)
+{
+    switch (chain) {
+    case ChainType::MAIN:
+        return "main";
+    case ChainType::TESTNET:
+        return "test";
+    case ChainType::SIGNET:
+        return "signet";
+    case ChainType::REGTEST:
+        return "regtest";
+    }
+    assert(false);
+}
+
+std::optional<ChainType> ChainTypeFromString(std::string_view chain)
+{
+    if (chain == "main") {
+        return ChainType::MAIN;
+    } else if (chain == "test") {
+        return ChainType::TESTNET;
+    } else if (chain == "signet") {
+        return ChainType::SIGNET;
+    } else if (chain == "regtest") {
+        return ChainType::REGTEST;
+    } else {
+        return std::nullopt;
+    }
+}
diff --git a/src/util/chaintype.h b/src/util/chaintype.h
new file mode 100644
index 00000000000..c73985df578
--- /dev/null
+++ b/src/util/chaintype.h
@@ -0,0 +1,22 @@
+// Copyright (c) 2023 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_UTIL_CHAINTYPE_H
+#define BITCOIN_UTIL_CHAINTYPE_H
+
+#include <optional>
+#include <string>
+
+enum class ChainType {
+    MAIN,
+    TESTNET,
+    SIGNET,
+    REGTEST,
+};
+
+std::string ChainTypeToString(ChainType chain);
+
+std::optional<ChainType> ChainTypeFromString(std::string_view chain);
+
+#endif // BITCOIN_UTIL_CHAINTYPE_H
diff --git a/src/util/settings.cpp b/src/util/settings.cpp
index bb257c0584e..db3d60046ed 100644
--- a/src/util/settings.cpp
+++ b/src/util/settings.cpp
@@ -130,7 +130,7 @@ SettingsValue GetSetting(const Settings& settings,
     const std::string& name,
     bool ignore_default_section_config,
     bool ignore_nonpersistent,
-    bool get_chain_name)
+    bool get_chain_type)
 {
     SettingsValue result;
     bool done = false; // Done merging any more settings sources.
@@ -145,17 +145,17 @@ SettingsValue GetSetting(const Settings& settings,
         // assigned value instead of last. In general, later settings take
         // precedence over early settings, but for backwards compatibility in
         // the config file the precedence is reversed for all settings except
-        // chain name settings.
+        // chain type settings.
         const bool reverse_precedence =
             (source == Source::CONFIG_FILE_NETWORK_SECTION || source == Source::CONFIG_FILE_DEFAULT_SECTION) &&
-            !get_chain_name;
+            !get_chain_type;
 
         // Weird behavior preserved for backwards compatibility: Negated
         // -regtest and -testnet arguments which you would expect to override
         // values set in the configuration file are currently accepted but
         // silently ignored. It would be better to apply these just like other
         // negated values, or at least warn they are ignored.
-        const bool skip_negated_command_line = get_chain_name;
+        const bool skip_negated_command_line = get_chain_type;
 
         if (done) return;
 
diff --git a/src/util/settings.h b/src/util/settings.h
index 27e87a47517..bb1fe585e13 100644
--- a/src/util/settings.h
+++ b/src/util/settings.h
@@ -60,14 +60,14 @@ bool WriteSettings(const fs::path& path,
 //!                               command line). Only return settings in the
 //!                               read-only config and read-write settings
 //!                               files.
-//! @param get_chain_name - enable special backwards compatible behavior
-//!                         for GetChainName
+//! @param get_chain_type - enable special backwards compatible behavior
+//!                         for GetChainType
 SettingsValue GetSetting(const Settings& settings,
     const std::string& section,
     const std::string& name,
     bool ignore_default_section_config,
     bool ignore_nonpersistent,
-    bool get_chain_name);
+    bool get_chain_type);
 
 //! Get combined setting value similar to GetSetting(), except if setting was
 //! specified multiple times, return a list of all the values specified.
diff --git a/src/wallet/external_signer_scriptpubkeyman.cpp b/src/wallet/external_signer_scriptpubkeyman.cpp
index 079e3baa4e0..e2852c5d520 100644
--- a/src/wallet/external_signer_scriptpubkeyman.cpp
+++ b/src/wallet/external_signer_scriptpubkeyman.cpp
@@ -45,7 +45,7 @@ ExternalSigner ExternalSignerScriptPubKeyMan::GetExternalSigner() {
     const std::string command = gArgs.GetArg("-signer", "");
     if (command == "") throw std::runtime_error(std::string(__func__) + ": restart bitcoind with -signer=<cmd>");
     std::vector<ExternalSigner> signers;
-    ExternalSigner::Enumerate(command, signers, Params().NetworkIDString());
+    ExternalSigner::Enumerate(command, signers, Params().GetChainTypeString());
     if (signers.empty()) throw std::runtime_error(std::string(__func__) + ": No external signers found");
     // TODO: add fingerprint argument instead of failing in case of multiple signers.
     if (signers.size() > 1) throw std::runtime_error(std::string(__func__) + ": More than one external signer found. Please connect only one at a time.");
diff --git a/src/wallet/test/init_test_fixture.cpp b/src/wallet/test/init_test_fixture.cpp
index 0adc63876ce..5bdf36ec192 100644
--- a/src/wallet/test/init_test_fixture.cpp
+++ b/src/wallet/test/init_test_fixture.cpp
@@ -4,6 +4,7 @@
 
 #include <common/args.h>
 #include <univalue.h>
+#include <util/chaintype.h>
 #include <util/check.h>
 #include <util/fs.h>
 
@@ -13,7 +14,7 @@
 #include <wallet/test/init_test_fixture.h>
 
 namespace wallet {
-InitWalletDirTestingSetup::InitWalletDirTestingSetup(const std::string& chainName) : BasicTestingSetup(chainName)
+InitWalletDirTestingSetup::InitWalletDirTestingSetup(const ChainType chainType) : BasicTestingSetup(chainType)
 {
     m_wallet_loader = MakeWalletLoader(*m_node.chain, m_args);
 
diff --git a/src/wallet/test/init_test_fixture.h b/src/wallet/test/init_test_fixture.h
index df5819fd1d9..ac7bb8997c3 100644
--- a/src/wallet/test/init_test_fixture.h
+++ b/src/wallet/test/init_test_fixture.h
@@ -9,11 +9,12 @@
 #include <interfaces/wallet.h>
 #include <node/context.h>
 #include <test/util/setup_common.h>
+#include <util/chaintype.h>
 
 
 namespace wallet {
 struct InitWalletDirTestingSetup: public BasicTestingSetup {
-    explicit InitWalletDirTestingSetup(const std::string& chainName = CBaseChainParams::MAIN);
+    explicit InitWalletDirTestingSetup(const ChainType chain_type = ChainType::MAIN);
     ~InitWalletDirTestingSetup();
     void SetWalletDir(const fs::path& walletdir_path);
 
diff --git a/src/wallet/test/wallet_test_fixture.cpp b/src/wallet/test/wallet_test_fixture.cpp
index 2dd8f9ad336..369526d17fa 100644
--- a/src/wallet/test/wallet_test_fixture.cpp
+++ b/src/wallet/test/wallet_test_fixture.cpp
@@ -5,10 +5,11 @@
 #include <wallet/test/wallet_test_fixture.h>
 
 #include <scheduler.h>
+#include <util/chaintype.h>
 
 namespace wallet {
-WalletTestingSetup::WalletTestingSetup(const std::string& chainName)
-    : TestingSetup(chainName),
+WalletTestingSetup::WalletTestingSetup(const ChainType chainType)
+    : TestingSetup(chainType),
       m_wallet_loader{interfaces::MakeWalletLoader(*m_node.chain, *Assert(m_node.args))},
       m_wallet(m_node.chain.get(), "", CreateMockWalletDatabase())
 {
diff --git a/src/wallet/test/wallet_test_fixture.h b/src/wallet/test/wallet_test_fixture.h
index f1ef15a2824..4aae02e075a 100644
--- a/src/wallet/test/wallet_test_fixture.h
+++ b/src/wallet/test/wallet_test_fixture.h
@@ -10,6 +10,7 @@
 #include <interfaces/chain.h>
 #include <interfaces/wallet.h>
 #include <node/context.h>
+#include <util/chaintype.h>
 #include <util/check.h>
 #include <wallet/wallet.h>
 
@@ -19,7 +20,7 @@ namespace wallet {
 /** Testing setup and teardown for wallet.
  */
 struct WalletTestingSetup : public TestingSetup {
-    explicit WalletTestingSetup(const std::string& chainName = CBaseChainParams::MAIN);
+    explicit WalletTestingSetup(const ChainType chainType = ChainType::MAIN);
     ~WalletTestingSetup();
 
     std::unique_ptr<interfaces::WalletLoader> m_wallet_loader;