Merge bitcoin/bitcoin#25168: refactor: Avoid passing params where not needed

fa1b76aeb064b315a3767a8f59836ca18aeb117e Do not call global Params() when chainman is in scope (MacroFake)
fa30234be81b6f49ae8150478a9255daa1611083 Do not pass CChainParams& to PeerManager::make (MacroFake)
fafe5c0ca2927642cbcec63ac73994737e1653d6 Do not pass CChainParams& to BlockAssembler constructor (MacroFake)
faf012b438b451dced785e7f031e07c0c55665e1 Do not pass Consensus::Params& to Chainstate helpers (MacroFake)
fa4ee53dca5ccf1b87f019f372ffc10528add943 Do not pass time getter to Chainstate helpers (MacroFake)

Pull request description:

  It seems confusing to pass chain params, consensus params, or a time function around when it is not needed.

  Fix this by:

  * Inlining the passed time getter function. I don't see a use case why this should be mockable.
  * Using `chainman.GetConsensus()` or `chainman.GetParams()`, where possible.

ACKs for top commit:
  promag:
    Code review ACK fa1b76aeb064b315a3767a8f59836ca18aeb117e.
  vincenzopalazzo:
    ACK https://github.com/bitcoin/bitcoin/pull/25168/commits/fa1b76aeb064b315a3767a8f59836ca18aeb117e

Tree-SHA512: 1abff5cba4b4871d97f17dbcdf67bc9255ff21fa4150a79a74e39b28f0610eab3e7dee24d56872dd6e111f003b55e288958cdd467e6218368d896f191e4ec9cd

21 files changed, 66 insertions, 92 deletions

diff --git a/src/bitcoin-chainstate.cpp b/src/bitcoin-chainstate.cpp
index ab805ac1ec..812585ba1e 100644
--- a/src/bitcoin-chainstate.cpp
+++ b/src/bitcoin-chainstate.cpp
@@ -76,7 +76,6 @@ int main(int argc, char* argv[])
                                    std::ref(chainman),
                                    nullptr,
                                    false,
-                                   chainparams.GetConsensus(),
                                    false,
                                    2 << 20,
                                    2 << 22,
@@ -91,10 +90,8 @@ int main(int argc, char* argv[])
         auto maybe_verify_error = node::VerifyLoadedChainstate(std::ref(chainman),
                                                                false,
                                                                false,
-                                                               chainparams.GetConsensus(),
                                                                DEFAULT_CHECKBLOCKS,
-                                                               DEFAULT_CHECKLEVEL,
-                                                               /*get_unix_time_seconds=*/static_cast<int64_t (*)()>(GetTime));
+                                                               DEFAULT_CHECKLEVEL);
         if (maybe_verify_error.has_value()) {
             std::cerr << "Failed to verify loaded Chain state from your datadir." << std::endl;
             goto epilogue;
diff --git a/src/init.cpp b/src/init.cpp
index e65af7e7ba..060541e975 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -1435,7 +1435,6 @@ bool AppInitMain(NodeContext& node, interfaces::BlockAndHeaderTipInfo* tip_info)
                                               chainman,
                                               Assert(node.mempool.get()),
                                               fPruneMode,
-                                              chainparams.GetConsensus(),
                                               fReindexChainState,
                                               cache_sizes.block_tree_db,
                                               cache_sizes.coins_db,
@@ -1482,7 +1481,7 @@ bool AppInitMain(NodeContext& node, interfaces::BlockAndHeaderTipInfo* tip_info)
                 break;
             case ChainstateLoadingError::ERROR_BLOCKS_WITNESS_INSUFFICIENTLY_VALIDATED:
                 strLoadError = strprintf(_("Witness data for blocks after height %d requires validation. Please restart with -reindex."),
-                                         chainparams.GetConsensus().SegwitHeight);
+                                         chainman.GetConsensus().SegwitHeight);
                 break;
             case ChainstateLoadingError::SHUTDOWN_PROBED:
                 break;
@@ -1499,10 +1498,8 @@ bool AppInitMain(NodeContext& node, interfaces::BlockAndHeaderTipInfo* tip_info)
                 maybe_verify_error = VerifyLoadedChainstate(chainman,
                                                             fReset,
                                                             fReindexChainState,
-                                                            chainparams.GetConsensus(),
                                                             check_blocks,
-                                                            args.GetIntArg("-checklevel", DEFAULT_CHECKLEVEL),
-                                                            /*get_unix_time_seconds=*/static_cast<int64_t(*)()>(GetTime));
+                                                            args.GetIntArg("-checklevel", DEFAULT_CHECKLEVEL));
             } catch (const std::exception& e) {
                 LogPrintf("%s\n", e.what());
                 maybe_verify_error = ChainstateLoadVerifyError::ERROR_GENERIC_FAILURE;
@@ -1558,7 +1555,7 @@ bool AppInitMain(NodeContext& node, interfaces::BlockAndHeaderTipInfo* tip_info)
     ChainstateManager& chainman = *Assert(node.chainman);
 
     assert(!node.peerman);
-    node.peerman = PeerManager::make(chainparams, *node.connman, *node.addrman, node.banman.get(),
+    node.peerman = PeerManager::make(*node.connman, *node.addrman, node.banman.get(),
                                      chainman, *node.mempool, ignores_incoming_txs);
     RegisterValidationInterface(node.peerman.get());
 
@@ -1680,8 +1677,8 @@ bool AppInitMain(NodeContext& node, interfaces::BlockAndHeaderTipInfo* tip_info)
         chain_active_height = chainman.ActiveChain().Height();
         if (tip_info) {
             tip_info->block_height = chain_active_height;
-            tip_info->block_time = chainman.ActiveChain().Tip() ? chainman.ActiveChain().Tip()->GetBlockTime() : Params().GenesisBlock().GetBlockTime();
-            tip_info->verification_progress = GuessVerificationProgress(Params().TxData(), chainman.ActiveChain().Tip());
+            tip_info->block_time = chainman.ActiveChain().Tip() ? chainman.ActiveChain().Tip()->GetBlockTime() : chainman.GetParams().GenesisBlock().GetBlockTime();
+            tip_info->verification_progress = GuessVerificationProgress(chainman.GetParams().TxData(), chainman.ActiveChain().Tip());
         }
         if (tip_info && chainman.m_best_header) {
             tip_info->header_height = chainman.m_best_header->nHeight;
diff --git a/src/net_processing.cpp b/src/net_processing.cpp
index f9178baf25..d2c481e28e 100644
--- a/src/net_processing.cpp
+++ b/src/net_processing.cpp
@@ -459,7 +459,7 @@ struct CNodeState {
 class PeerManagerImpl final : public PeerManager
 {
 public:
-    PeerManagerImpl(const CChainParams& chainparams, CConnman& connman, AddrMan& addrman,
+    PeerManagerImpl(CConnman& connman, AddrMan& addrman,
                     BanMan* banman, ChainstateManager& chainman,
                     CTxMemPool& pool, bool ignore_incoming_txs);
 
@@ -1584,17 +1584,17 @@ std::optional<std::string> PeerManagerImpl::FetchBlock(NodeId peer_id, const CBl
     return std::nullopt;
 }
 
-std::unique_ptr<PeerManager> PeerManager::make(const CChainParams& chainparams, CConnman& connman, AddrMan& addrman,
+std::unique_ptr<PeerManager> PeerManager::make(CConnman& connman, AddrMan& addrman,
                                                BanMan* banman, ChainstateManager& chainman,
                                                CTxMemPool& pool, bool ignore_incoming_txs)
 {
-    return std::make_unique<PeerManagerImpl>(chainparams, connman, addrman, banman, chainman, pool, ignore_incoming_txs);
+    return std::make_unique<PeerManagerImpl>(connman, addrman, banman, chainman, pool, ignore_incoming_txs);
 }
 
-PeerManagerImpl::PeerManagerImpl(const CChainParams& chainparams, CConnman& connman, AddrMan& addrman,
+PeerManagerImpl::PeerManagerImpl(CConnman& connman, AddrMan& addrman,
                                  BanMan* banman, ChainstateManager& chainman,
                                  CTxMemPool& pool, bool ignore_incoming_txs)
-    : m_chainparams(chainparams),
+    : m_chainparams(chainman.GetParams()),
       m_connman(connman),
       m_addrman(addrman),
       m_banman(banman),
diff --git a/src/net_processing.h b/src/net_processing.h
index c982b919a6..d5c73e6c79 100644
--- a/src/net_processing.h
+++ b/src/net_processing.h
@@ -39,7 +39,7 @@ struct CNodeStateStats {
 class PeerManager : public CValidationInterface, public NetEventsInterface
 {
 public:
-    static std::unique_ptr<PeerManager> make(const CChainParams& chainparams, CConnman& connman, AddrMan& addrman,
+    static std::unique_ptr<PeerManager> make(CConnman& connman, AddrMan& addrman,
                                              BanMan* banman, ChainstateManager& chainman,
                                              CTxMemPool& pool, bool ignore_incoming_txs);
     virtual ~PeerManager() { }
diff --git a/src/node/chainstate.cpp b/src/node/chainstate.cpp
index 99615dea69..54ba5b7966 100644
--- a/src/node/chainstate.cpp
+++ b/src/node/chainstate.cpp
@@ -13,7 +13,6 @@ std::optional<ChainstateLoadingError> LoadChainstate(bool fReset,
                                                      ChainstateManager& chainman,
                                                      CTxMemPool* mempool,
                                                      bool fPruneMode,
-                                                     const Consensus::Params& consensus_params,
                                                      bool fReindexChainState,
                                                      int64_t nBlockTreeDBCache,
                                                      int64_t nCoinDBCache,
@@ -57,7 +56,7 @@ std::optional<ChainstateLoadingError> LoadChainstate(bool fReset,
     }
 
     if (!chainman.BlockIndex().empty() &&
-            !chainman.m_blockman.LookupBlockIndex(consensus_params.hashGenesisBlock)) {
+            !chainman.m_blockman.LookupBlockIndex(chainman.GetConsensus().hashGenesisBlock)) {
         return ChainstateLoadingError::ERROR_BAD_GENESIS_BLOCK;
     }
 
@@ -126,10 +125,8 @@ std::optional<ChainstateLoadingError> LoadChainstate(bool fReset,
 std::optional<ChainstateLoadVerifyError> VerifyLoadedChainstate(ChainstateManager& chainman,
                                                                 bool fReset,
                                                                 bool fReindexChainState,
-                                                                const Consensus::Params& consensus_params,
                                                                 int check_blocks,
-                                                                int check_level,
-                                                                std::function<int64_t()> get_unix_time_seconds)
+                                                                int check_level)
 {
     auto is_coinsview_empty = [&](CChainState* chainstate) EXCLUSIVE_LOCKS_REQUIRED(::cs_main) {
         return fReset || fReindexChainState || chainstate->CoinsTip().GetBestBlock().IsNull();
@@ -140,12 +137,12 @@ std::optional<ChainstateLoadVerifyError> VerifyLoadedChainstate(ChainstateManage
     for (CChainState* chainstate : chainman.GetAll()) {
         if (!is_coinsview_empty(chainstate)) {
             const CBlockIndex* tip = chainstate->m_chain.Tip();
-            if (tip && tip->nTime > get_unix_time_seconds() + MAX_FUTURE_BLOCK_TIME) {
+            if (tip && tip->nTime > GetTime() + MAX_FUTURE_BLOCK_TIME) {
                 return ChainstateLoadVerifyError::ERROR_BLOCK_FROM_FUTURE;
             }
 
             if (!CVerifyDB().VerifyDB(
-                    *chainstate, consensus_params, chainstate->CoinsDB(),
+                    *chainstate, chainman.GetConsensus(), chainstate->CoinsDB(),
                     check_level,
                     check_blocks)) {
                 return ChainstateLoadVerifyError::ERROR_CORRUPTED_BLOCK_DB;
diff --git a/src/node/chainstate.h b/src/node/chainstate.h
index 8ba04f1436..ff7935e8e0 100644
--- a/src/node/chainstate.h
+++ b/src/node/chainstate.h
@@ -59,7 +59,6 @@ std::optional<ChainstateLoadingError> LoadChainstate(bool fReset,
                                                      ChainstateManager& chainman,
                                                      CTxMemPool* mempool,
                                                      bool fPruneMode,
-                                                     const Consensus::Params& consensus_params,
                                                      bool fReindexChainState,
                                                      int64_t nBlockTreeDBCache,
                                                      int64_t nCoinDBCache,
@@ -78,10 +77,8 @@ enum class ChainstateLoadVerifyError {
 std::optional<ChainstateLoadVerifyError> VerifyLoadedChainstate(ChainstateManager& chainman,
                                                                 bool fReset,
                                                                 bool fReindexChainState,
-                                                                const Consensus::Params& consensus_params,
                                                                 int check_blocks,
-                                                                int check_level,
-                                                                std::function<int64_t()> get_unix_time_seconds);
+                                                                int check_level);
 } // namespace node
 
 #endif // BITCOIN_NODE_CHAINSTATE_H
diff --git a/src/node/interfaces.cpp b/src/node/interfaces.cpp
index f2debc790c..decc347954 100644
--- a/src/node/interfaces.cpp
+++ b/src/node/interfaces.cpp
@@ -228,7 +228,7 @@ public:
     uint256 getBestBlockHash() override
     {
         const CBlockIndex* tip = WITH_LOCK(::cs_main, return chainman().ActiveChain().Tip());
-        return tip ? tip->GetBlockHash() : Params().GenesisBlock().GetHash();
+        return tip ? tip->GetBlockHash() : chainman().GetParams().GenesisBlock().GetHash();
     }
     int64_t getLastBlockTime() override
     {
@@ -236,7 +236,7 @@ public:
         if (chainman().ActiveChain().Tip()) {
             return chainman().ActiveChain().Tip()->GetBlockTime();
         }
-        return Params().GenesisBlock().GetBlockTime(); // Genesis block's time of current network
+        return chainman().GetParams().GenesisBlock().GetBlockTime(); // Genesis block's time of current network
     }
     double getVerificationProgress() override
     {
@@ -245,7 +245,7 @@ public:
             LOCK(::cs_main);
             tip = chainman().ActiveChain().Tip();
         }
-        return GuessVerificationProgress(Params().TxData(), tip);
+        return GuessVerificationProgress(chainman().GetParams().TxData(), tip);
     }
     bool isInitialBlockDownload() override {
         return chainman().ActiveChainstate().IsInitialBlockDownload();
@@ -546,7 +546,7 @@ public:
     double guessVerificationProgress(const uint256& block_hash) override
     {
         LOCK(cs_main);
-        return GuessVerificationProgress(Params().TxData(), chainman().m_blockman.LookupBlockIndex(block_hash));
+        return GuessVerificationProgress(chainman().GetParams().TxData(), chainman().m_blockman.LookupBlockIndex(block_hash));
     }
     bool hasBlocks(const uint256& block_hash, int min_height, std::optional<int> max_height) override
     {
diff --git a/src/node/miner.cpp b/src/node/miner.cpp
index 770ccdbe1a..48e50f3714 100644
--- a/src/node/miner.cpp
+++ b/src/node/miner.cpp
@@ -62,8 +62,8 @@ BlockAssembler::Options::Options()
     nBlockMaxWeight = DEFAULT_BLOCK_MAX_WEIGHT;
 }
 
-BlockAssembler::BlockAssembler(CChainState& chainstate, const CTxMemPool& mempool, const CChainParams& params, const Options& options)
-    : chainparams(params),
+BlockAssembler::BlockAssembler(CChainState& chainstate, const CTxMemPool& mempool, const Options& options)
+    : chainparams{chainstate.m_chainman.GetParams()},
       m_mempool(mempool),
       m_chainstate(chainstate)
 {
@@ -87,8 +87,8 @@ static BlockAssembler::Options DefaultOptions()
     return options;
 }
 
-BlockAssembler::BlockAssembler(CChainState& chainstate, const CTxMemPool& mempool, const CChainParams& params)
-    : BlockAssembler(chainstate, mempool, params, DefaultOptions()) {}
+BlockAssembler::BlockAssembler(CChainState& chainstate, const CTxMemPool& mempool)
+    : BlockAssembler(chainstate, mempool, DefaultOptions()) {}
 
 void BlockAssembler::resetBlock()
 {
diff --git a/src/node/miner.h b/src/node/miner.h
index 678df815c0..7cf8e3fb9e 100644
--- a/src/node/miner.h
+++ b/src/node/miner.h
@@ -157,8 +157,8 @@ public:
         CFeeRate blockMinFeeRate;
     };
 
-    explicit BlockAssembler(CChainState& chainstate, const CTxMemPool& mempool, const CChainParams& params);
-    explicit BlockAssembler(CChainState& chainstate, const CTxMemPool& mempool, const CChainParams& params, const Options& options);
+    explicit BlockAssembler(CChainState& chainstate, const CTxMemPool& mempool);
+    explicit BlockAssembler(CChainState& chainstate, const CTxMemPool& mempool, const Options& options);
 
     /** Construct a new block template with coinbase to scriptPubKeyIn */
     std::unique_ptr<CBlockTemplate> CreateNewBlock(const CScript& scriptPubKeyIn);
diff --git a/src/rest.cpp b/src/rest.cpp
index 22b5d2e074..1b90baaf95 100644
--- a/src/rest.cpp
+++ b/src/rest.cpp
@@ -305,7 +305,7 @@ static bool rest_block(const std::any& context,
         if (chainman.m_blockman.IsBlockPruned(pblockindex))
             return RESTERR(req, HTTP_NOT_FOUND, hashStr + " not available (pruned data)");
 
-        if (!ReadBlockFromDisk(block, pblockindex, Params().GetConsensus()))
+        if (!ReadBlockFromDisk(block, pblockindex, chainman.GetParams().GetConsensus()))
             return RESTERR(req, HTTP_NOT_FOUND, hashStr + " not found");
     }
 
diff --git a/src/rpc/blockchain.cpp b/src/rpc/blockchain.cpp
index 0148544dc9..0a9458c276 100644
--- a/src/rpc/blockchain.cpp
+++ b/src/rpc/blockchain.cpp
@@ -777,11 +777,11 @@ static RPCHelpMan pruneblockchain()
 
     unsigned int height = (unsigned int) heightParam;
     unsigned int chainHeight = (unsigned int) active_chain.Height();
-    if (chainHeight < Params().PruneAfterHeight())
+    if (chainHeight < chainman.GetParams().PruneAfterHeight()) {
         throw JSONRPCError(RPC_MISC_ERROR, "Blockchain is too short for pruning.");
-    else if (height > chainHeight)
+    } else if (height > chainHeight) {
         throw JSONRPCError(RPC_INVALID_PARAMETER, "Blockchain is shorter than the attempted prune height.");
-    else if (height > chainHeight - MIN_BLOCKS_TO_KEEP) {
+    } else if (height > chainHeight - MIN_BLOCKS_TO_KEEP) {
         LogPrint(BCLog::RPC, "Attempt to prune blocks close to the tip.  Retaining the minimum number of blocks.\n");
         height = chainHeight - MIN_BLOCKS_TO_KEEP;
     }
@@ -1058,7 +1058,7 @@ static RPCHelpMan verifychain()
 
     CChainState& active_chainstate = chainman.ActiveChainstate();
     return CVerifyDB().VerifyDB(
-        active_chainstate, Params().GetConsensus(), active_chainstate.CoinsTip(), check_level, check_depth);
+        active_chainstate, chainman.GetParams().GetConsensus(), active_chainstate.CoinsTip(), check_level, check_depth);
 },
     };
 }
@@ -1189,14 +1189,14 @@ RPCHelpMan getblockchaininfo()
     const CBlockIndex& tip{*CHECK_NONFATAL(active_chainstate.m_chain.Tip())};
     const int height{tip.nHeight};
     UniValue obj(UniValue::VOBJ);
-    obj.pushKV("chain", Params().NetworkIDString());
+    obj.pushKV("chain", chainman.GetParams().NetworkIDString());
     obj.pushKV("blocks", height);
     obj.pushKV("headers", chainman.m_best_header ? chainman.m_best_header->nHeight : -1);
     obj.pushKV("bestblockhash", tip.GetBlockHash().GetHex());
     obj.pushKV("difficulty", GetDifficulty(&tip));
     obj.pushKV("time", tip.GetBlockTime());
     obj.pushKV("mediantime", tip.GetMedianTimePast());
-    obj.pushKV("verificationprogress", GuessVerificationProgress(Params().TxData(), &tip));
+    obj.pushKV("verificationprogress", GuessVerificationProgress(chainman.GetParams().TxData(), &tip));
     obj.pushKV("initialblockdownload", active_chainstate.IsInitialBlockDownload());
     obj.pushKV("chainwork", tip.nChainWork.GetHex());
     obj.pushKV("size_on_disk", chainman.m_blockman.CalculateCurrentUsage());
@@ -1563,7 +1563,7 @@ static RPCHelpMan getchaintxstats()
 {
     ChainstateManager& chainman = EnsureAnyChainman(request.context);
     const CBlockIndex* pindex;
-    int blockcount = 30 * 24 * 60 * 60 / Params().GetConsensus().nPowTargetSpacing; // By default: 1 month
+    int blockcount = 30 * 24 * 60 * 60 / chainman.GetParams().GetConsensus().nPowTargetSpacing; // By default: 1 month
 
     if (request.params[1].isNull()) {
         LOCK(cs_main);
@@ -1879,7 +1879,7 @@ static RPCHelpMan getblockstats()
     ret_all.pushKV("minfeerate", (minfeerate == MAX_MONEY) ? 0 : minfeerate);
     ret_all.pushKV("mintxsize", mintxsize == MAX_BLOCK_SERIALIZED_SIZE ? 0 : mintxsize);
     ret_all.pushKV("outs", outputs);
-    ret_all.pushKV("subsidy", GetBlockSubsidy(pindex.nHeight, Params().GetConsensus()));
+    ret_all.pushKV("subsidy", GetBlockSubsidy(pindex.nHeight, chainman.GetParams().GetConsensus()));
     ret_all.pushKV("swtotal_size", swtotal_size);
     ret_all.pushKV("swtotal_weight", swtotal_weight);
     ret_all.pushKV("swtxs", swtxs);
diff --git a/src/rpc/mining.cpp b/src/rpc/mining.cpp
index 16b4b6728c..b2c25b60ee 100644
--- a/src/rpc/mining.cpp
+++ b/src/rpc/mining.cpp
@@ -119,9 +119,7 @@ static bool GenerateBlock(ChainstateManager& chainman, CBlock& block, uint64_t&
     block_hash.SetNull();
     block.hashMerkleRoot = BlockMerkleRoot(block);
 
-    CChainParams chainparams(Params());
-
-    while (max_tries > 0 && block.nNonce < std::numeric_limits<uint32_t>::max() && !CheckProofOfWork(block.GetHash(), block.nBits, chainparams.GetConsensus()) && !ShutdownRequested()) {
+    while (max_tries > 0 && block.nNonce < std::numeric_limits<uint32_t>::max() && !CheckProofOfWork(block.GetHash(), block.nBits, chainman.GetConsensus()) && !ShutdownRequested()) {
         ++block.nNonce;
         --max_tries;
     }
@@ -145,7 +143,7 @@ static UniValue generateBlocks(ChainstateManager& chainman, const CTxMemPool& me
 {
     UniValue blockHashes(UniValue::VARR);
     while (nGenerate > 0 && !ShutdownRequested()) {
-        std::unique_ptr<CBlockTemplate> pblocktemplate(BlockAssembler(chainman.ActiveChainstate(), mempool, Params()).CreateNewBlock(coinbase_script));
+        std::unique_ptr<CBlockTemplate> pblocktemplate(BlockAssembler{chainman.ActiveChainstate(), mempool}.CreateNewBlock(coinbase_script));
         if (!pblocktemplate.get())
             throw JSONRPCError(RPC_INTERNAL_ERROR, "Couldn't create new block");
         CBlock *pblock = &pblocktemplate->block;
@@ -349,7 +347,6 @@ static RPCHelpMan generateblock()
         }
     }
 
-    CChainParams chainparams(Params());
     CBlock block;
 
     ChainstateManager& chainman = EnsureChainman(node);
@@ -357,7 +354,7 @@ static RPCHelpMan generateblock()
         LOCK(cs_main);
 
         CTxMemPool empty_mempool;
-        std::unique_ptr<CBlockTemplate> blocktemplate(BlockAssembler(chainman.ActiveChainstate(), empty_mempool, chainparams).CreateNewBlock(coinbase_script));
+        std::unique_ptr<CBlockTemplate> blocktemplate(BlockAssembler{chainman.ActiveChainstate(), empty_mempool}.CreateNewBlock(coinbase_script));
         if (!blocktemplate) {
             throw JSONRPCError(RPC_INTERNAL_ERROR, "Couldn't create new block");
         }
@@ -374,7 +371,7 @@ static RPCHelpMan generateblock()
         LOCK(cs_main);
 
         BlockValidationState state;
-        if (!TestBlockValidity(state, chainparams, chainman.ActiveChainstate(), block, chainman.m_blockman.LookupBlockIndex(block.hashPrevBlock), false, false)) {
+        if (!TestBlockValidity(state, chainman.GetParams(), chainman.ActiveChainstate(), block, chainman.m_blockman.LookupBlockIndex(block.hashPrevBlock), false, false)) {
             throw JSONRPCError(RPC_VERIFY_ERROR, strprintf("TestBlockValidity failed: %s", state.ToString()));
         }
     }
@@ -429,7 +426,7 @@ 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",            Params().NetworkIDString());
+    obj.pushKV("chain", chainman.GetParams().NetworkIDString());
     obj.pushKV("warnings",         GetWarnings(false).original);
     return obj;
 },
@@ -643,7 +640,7 @@ static RPCHelpMan getblocktemplate()
             if (block.hashPrevBlock != pindexPrev->GetBlockHash())
                 return "inconclusive-not-best-prevblk";
             BlockValidationState state;
-            TestBlockValidity(state, Params(), active_chainstate, block, pindexPrev, false, true);
+            TestBlockValidity(state, chainman.GetParams(), active_chainstate, block, pindexPrev, false, true);
             return BIP22ValidationResult(state);
         }
 
@@ -665,7 +662,7 @@ static RPCHelpMan getblocktemplate()
     if (strMode != "template")
         throw JSONRPCError(RPC_INVALID_PARAMETER, "Invalid mode");
 
-    if (!Params().IsTestChain()) {
+    if (!chainman.GetParams().IsTestChain()) {
         const CConnman& connman = EnsureConnman(node);
         if (connman.GetNodeCount(ConnectionDirection::Both) == 0) {
             throw JSONRPCError(RPC_CLIENT_NOT_CONNECTED, PACKAGE_NAME " is not connected!");
@@ -726,7 +723,7 @@ static RPCHelpMan getblocktemplate()
         // TODO: Maybe recheck connections/IBD and (if something wrong) send an expires-immediately template to stop miners?
     }
 
-    const Consensus::Params& consensusParams = Params().GetConsensus();
+    const Consensus::Params& consensusParams = chainman.GetParams().GetConsensus();
 
     // GBT must be called with 'signet' set in the rules for signet chains
     if (consensusParams.signet_blocks && setClientRules.count("signet") != 1) {
@@ -755,7 +752,7 @@ static RPCHelpMan getblocktemplate()
 
         // Create new block
         CScript scriptDummy = CScript() << OP_TRUE;
-        pblocktemplate = BlockAssembler(active_chainstate, mempool, Params()).CreateNewBlock(scriptDummy);
+        pblocktemplate = BlockAssembler{active_chainstate, mempool}.CreateNewBlock(scriptDummy);
         if (!pblocktemplate)
             throw JSONRPCError(RPC_OUT_OF_MEMORY, "Out of memory");
 
diff --git a/src/rpc/rawtransaction.cpp b/src/rpc/rawtransaction.cpp
index 84b8e8dbe0..b9b8c36bb3 100644
--- a/src/rpc/rawtransaction.cpp
+++ b/src/rpc/rawtransaction.cpp
@@ -217,7 +217,7 @@ static RPCHelpMan getrawtransaction()
     uint256 hash = ParseHashV(request.params[0], "parameter 1");
     const CBlockIndex* blockindex = nullptr;
 
-    if (hash == Params().GenesisBlock().hashMerkleRoot) {
+    if (hash == chainman.GetParams().GenesisBlock().hashMerkleRoot) {
         // Special exception for the genesis block coinbase transaction
         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "The genesis block coinbase is not considered an ordinary transaction and cannot be retrieved");
     }
@@ -245,7 +245,7 @@ static RPCHelpMan getrawtransaction()
     }
 
     uint256 hash_block;
-    const CTransactionRef tx = GetTransaction(blockindex, node.mempool.get(), hash, Params().GetConsensus(), hash_block);
+    const CTransactionRef tx = GetTransaction(blockindex, node.mempool.get(), hash, chainman.GetConsensus(), hash_block);
     if (!tx) {
         std::string errmsg;
         if (blockindex) {
diff --git a/src/rpc/txoutproof.cpp b/src/rpc/txoutproof.cpp
index d16820baeb..dcf6c6bee1 100644
--- a/src/rpc/txoutproof.cpp
+++ b/src/rpc/txoutproof.cpp
@@ -87,7 +87,7 @@ static RPCHelpMan gettxoutproof()
             LOCK(cs_main);
 
             if (pblockindex == nullptr) {
-                const CTransactionRef tx = GetTransaction(/*block_index=*/nullptr, /*mempool=*/nullptr, *setTxids.begin(), Params().GetConsensus(), hashBlock);
+                const CTransactionRef tx = GetTransaction(/*block_index=*/nullptr, /*mempool=*/nullptr, *setTxids.begin(), chainman.GetConsensus(), hashBlock);
                 if (!tx || hashBlock.IsNull()) {
                     throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Transaction not yet in block");
                 }
@@ -98,7 +98,7 @@ static RPCHelpMan gettxoutproof()
             }
 
             CBlock block;
-            if (!ReadBlockFromDisk(block, pblockindex, Params().GetConsensus())) {
+            if (!ReadBlockFromDisk(block, pblockindex, chainman.GetConsensus())) {
                 throw JSONRPCError(RPC_INTERNAL_ERROR, "Can't read block from disk");
             }
 
diff --git a/src/test/blockfilter_index_tests.cpp b/src/test/blockfilter_index_tests.cpp
index ffb9fb55d9..ba1eacfc78 100644
--- a/src/test/blockfilter_index_tests.cpp
+++ b/src/test/blockfilter_index_tests.cpp
@@ -65,8 +65,7 @@ CBlock BuildChainTestingSetup::CreateBlock(const CBlockIndex* prev,
     const std::vector<CMutableTransaction>& txns,
     const CScript& scriptPubKey)
 {
-    const CChainParams& chainparams = Params();
-    std::unique_ptr<CBlockTemplate> pblocktemplate = BlockAssembler(m_node.chainman->ActiveChainstate(), *m_node.mempool, chainparams).CreateNewBlock(scriptPubKey);
+    std::unique_ptr<CBlockTemplate> pblocktemplate = BlockAssembler{m_node.chainman->ActiveChainstate(), *m_node.mempool}.CreateNewBlock(scriptPubKey);
     CBlock& block = pblocktemplate->block;
     block.hashPrevBlock = prev->GetBlockHash();
     block.nTime = prev->nTime + 1;
@@ -83,7 +82,7 @@ CBlock BuildChainTestingSetup::CreateBlock(const CBlockIndex* prev,
         block.hashMerkleRoot = BlockMerkleRoot(block);
     }
 
-    while (!CheckProofOfWork(block.GetHash(), block.nBits, chainparams.GetConsensus())) ++block.nNonce;
+    while (!CheckProofOfWork(block.GetHash(), block.nBits, m_node.chainman->GetConsensus())) ++block.nNonce;
 
     return block;
 }
diff --git a/src/test/denialofservice_tests.cpp b/src/test/denialofservice_tests.cpp
index 7b492fd1da..3b4a6f2637 100644
--- a/src/test/denialofservice_tests.cpp
+++ b/src/test/denialofservice_tests.cpp
@@ -44,11 +44,10 @@ BOOST_FIXTURE_TEST_SUITE(denialofservice_tests, TestingSetup)
 // work.
 BOOST_AUTO_TEST_CASE(outbound_slow_chain_eviction)
 {
-    const CChainParams& chainparams = Params();
     auto connman = std::make_unique<CConnman>(0x1337, 0x1337, *m_node.addrman, *m_node.netgroupman);
     // Disable inactivity checks for this test to avoid interference
     static_cast<ConnmanTestMsg*>(connman.get())->SetPeerConnectTimeout(99999s);
-    auto peerLogic = PeerManager::make(chainparams, *connman, *m_node.addrman, nullptr,
+    auto peerLogic = PeerManager::make(*connman, *m_node.addrman, nullptr,
                                        *m_node.chainman, *m_node.mempool, false);
 
     // Mock an outbound peer
@@ -134,9 +133,8 @@ static void AddRandomOutboundPeer(NodeId& id, std::vector<CNode*>& vNodes, PeerM
 BOOST_AUTO_TEST_CASE(stale_tip_peer_management)
 {
     NodeId id{0};
-    const CChainParams& chainparams = Params();
     auto connman = std::make_unique<ConnmanTestMsg>(0x1337, 0x1337, *m_node.addrman, *m_node.netgroupman);
-    auto peerLogic = PeerManager::make(chainparams, *connman, *m_node.addrman, nullptr,
+    auto peerLogic = PeerManager::make(*connman, *m_node.addrman, nullptr,
                                        *m_node.chainman, *m_node.mempool, false);
 
     constexpr int max_outbound_full_relay = MAX_OUTBOUND_FULL_RELAY_CONNECTIONS;
@@ -147,7 +145,7 @@ BOOST_AUTO_TEST_CASE(stale_tip_peer_management)
 
     const auto time_init{GetTime<std::chrono::seconds>()};
     SetMockTime(time_init);
-    const auto time_later{time_init + 3 * std::chrono::seconds{chainparams.GetConsensus().nPowTargetSpacing} + 1s};
+    const auto time_later{time_init + 3 * std::chrono::seconds{m_node.chainman->GetConsensus().nPowTargetSpacing} + 1s};
     connman->Init(options);
     std::vector<CNode *> vNodes;
 
@@ -212,9 +210,8 @@ BOOST_AUTO_TEST_CASE(stale_tip_peer_management)
 BOOST_AUTO_TEST_CASE(block_relay_only_eviction)
 {
     NodeId id{0};
-    const CChainParams& chainparams = Params();
     auto connman = std::make_unique<ConnmanTestMsg>(0x1337, 0x1337, *m_node.addrman, *m_node.netgroupman);
-    auto peerLogic = PeerManager::make(chainparams, *connman, *m_node.addrman, nullptr,
+    auto peerLogic = PeerManager::make(*connman, *m_node.addrman, nullptr,
                                        *m_node.chainman, *m_node.mempool, false);
 
     constexpr int max_outbound_block_relay{MAX_BLOCK_RELAY_ONLY_CONNECTIONS};
@@ -274,10 +271,9 @@ BOOST_AUTO_TEST_CASE(block_relay_only_eviction)
 
 BOOST_AUTO_TEST_CASE(peer_discouragement)
 {
-    const CChainParams& chainparams = Params();
     auto banman = std::make_unique<BanMan>(m_args.GetDataDirBase() / "banlist", nullptr, DEFAULT_MISBEHAVING_BANTIME);
     auto connman = std::make_unique<ConnmanTestMsg>(0x1337, 0x1337, *m_node.addrman, *m_node.netgroupman);
-    auto peerLogic = PeerManager::make(chainparams, *connman, *m_node.addrman, banman.get(),
+    auto peerLogic = PeerManager::make(*connman, *m_node.addrman, banman.get(),
                                        *m_node.chainman, *m_node.mempool, false);
 
     CNetAddr tor_netaddr;
@@ -390,10 +386,9 @@ BOOST_AUTO_TEST_CASE(peer_discouragement)
 
 BOOST_AUTO_TEST_CASE(DoS_bantime)
 {
-    const CChainParams& chainparams = Params();
     auto banman = std::make_unique<BanMan>(m_args.GetDataDirBase() / "banlist", nullptr, DEFAULT_MISBEHAVING_BANTIME);
     auto connman = std::make_unique<CConnman>(0x1337, 0x1337, *m_node.addrman, *m_node.netgroupman);
-    auto peerLogic = PeerManager::make(chainparams, *connman, *m_node.addrman, banman.get(),
+    auto peerLogic = PeerManager::make(*connman, *m_node.addrman, banman.get(),
                                        *m_node.chainman, *m_node.mempool, false);
 
     banman->ClearBanned();
diff --git a/src/test/fuzz/tx_pool.cpp b/src/test/fuzz/tx_pool.cpp
index f686f4fd86..771d7a11cb 100644
--- a/src/test/fuzz/tx_pool.cpp
+++ b/src/test/fuzz/tx_pool.cpp
@@ -97,7 +97,7 @@ void Finish(FuzzedDataProvider& fuzzed_data_provider, MockedTxPool& tx_pool, CCh
         BlockAssembler::Options options;
         options.nBlockMaxWeight = fuzzed_data_provider.ConsumeIntegralInRange(0U, MAX_BLOCK_WEIGHT);
         options.blockMinFeeRate = CFeeRate{ConsumeMoney(fuzzed_data_provider, /*max=*/COIN)};
-        auto assembler = BlockAssembler{chainstate, *static_cast<CTxMemPool*>(&tx_pool), chainstate.m_params, options};
+        auto assembler = BlockAssembler{chainstate, *static_cast<CTxMemPool*>(&tx_pool), options};
         auto block_template = assembler.CreateNewBlock(CScript{} << OP_TRUE);
         Assert(block_template->block.vtx.size() >= 1);
     }
diff --git a/src/test/miner_tests.cpp b/src/test/miner_tests.cpp
index 0c3a13c5f8..01f9d68627 100644
--- a/src/test/miner_tests.cpp
+++ b/src/test/miner_tests.cpp
@@ -51,7 +51,7 @@ BlockAssembler MinerTestingSetup::AssemblerForTest(const CChainParams& params)
 
     options.nBlockMaxWeight = MAX_BLOCK_WEIGHT;
     options.blockMinFeeRate = blockMinFeeRate;
-    return BlockAssembler(m_node.chainman->ActiveChainstate(), *m_node.mempool, params, options);
+    return BlockAssembler{m_node.chainman->ActiveChainstate(), *m_node.mempool, options};
 }
 
 constexpr static struct {
diff --git a/src/test/util/mining.cpp b/src/test/util/mining.cpp
index 52e02c4fa4..a6d624fe84 100644
--- a/src/test/util/mining.cpp
+++ b/src/test/util/mining.cpp
@@ -77,7 +77,7 @@ CTxIn MineBlock(const NodeContext& node, const CScript& coinbase_scriptPubKey)
 std::shared_ptr<CBlock> PrepareBlock(const NodeContext& node, const CScript& coinbase_scriptPubKey)
 {
     auto block = std::make_shared<CBlock>(
-        BlockAssembler{Assert(node.chainman)->ActiveChainstate(), *Assert(node.mempool), Params()}
+        BlockAssembler{Assert(node.chainman)->ActiveChainstate(), *Assert(node.mempool)}
             .CreateNewBlock(coinbase_scriptPubKey)
             ->block);
 
diff --git a/src/test/util/setup_common.cpp b/src/test/util/setup_common.cpp
index 6891629f8e..ff78f87ec1 100644
--- a/src/test/util/setup_common.cpp
+++ b/src/test/util/setup_common.cpp
@@ -192,7 +192,6 @@ ChainTestingSetup::~ChainTestingSetup()
 TestingSetup::TestingSetup(const std::string& chainName, const std::vector<const char*>& extra_args)
     : ChainTestingSetup(chainName, extra_args)
 {
-    const CChainParams& chainparams = Params();
     // Ideally we'd move all the RPC tests to the functional testing framework
     // instead of unit tests, but for now we need these here.
     RegisterAllCoreRPCCommands(tableRPC);
@@ -201,7 +200,6 @@ TestingSetup::TestingSetup(const std::string& chainName, const std::vector<const
                                            *Assert(m_node.chainman.get()),
                                            Assert(m_node.mempool.get()),
                                            fPruneMode,
-                                           chainparams.GetConsensus(),
                                            m_args.GetBoolArg("-reindex-chainstate", false),
                                            m_cache_sizes.block_tree_db,
                                            m_cache_sizes.coins_db,
@@ -214,10 +212,8 @@ TestingSetup::TestingSetup(const std::string& chainName, const std::vector<const
         *Assert(m_node.chainman),
         fReindex.load(),
         m_args.GetBoolArg("-reindex-chainstate", false),
-        chainparams.GetConsensus(),
         m_args.GetIntArg("-checkblocks", DEFAULT_CHECKBLOCKS),
-        m_args.GetIntArg("-checklevel", DEFAULT_CHECKLEVEL),
-        /*get_unix_time_seconds=*/static_cast<int64_t(*)()>(GetTime));
+        m_args.GetIntArg("-checklevel", DEFAULT_CHECKLEVEL));
     assert(!maybe_verify_error.has_value());
 
     BlockValidationState state;
@@ -231,7 +227,7 @@ TestingSetup::TestingSetup(const std::string& chainName, const std::vector<const
                                                m_node.args->GetIntArg("-checkaddrman", 0));
     m_node.banman = std::make_unique<BanMan>(m_args.GetDataDirBase() / "banlist", nullptr, DEFAULT_MISBEHAVING_BANTIME);
     m_node.connman = std::make_unique<ConnmanTestMsg>(0x1337, 0x1337, *m_node.addrman, *m_node.netgroupman); // Deterministic randomness for tests.
-    m_node.peerman = PeerManager::make(chainparams, *m_node.connman, *m_node.addrman,
+    m_node.peerman = PeerManager::make(*m_node.connman, *m_node.addrman,
                                        m_node.banman.get(), *m_node.chainman,
                                        *m_node.mempool, false);
     {
@@ -276,9 +272,8 @@ CBlock TestChain100Setup::CreateBlock(
     const CScript& scriptPubKey,
     CChainState& chainstate)
 {
-    const CChainParams& chainparams = Params();
     CTxMemPool empty_pool;
-    CBlock block = BlockAssembler(chainstate, empty_pool, chainparams).CreateNewBlock(scriptPubKey)->block;
+    CBlock block = BlockAssembler{chainstate, empty_pool}.CreateNewBlock(scriptPubKey)->block;
 
     Assert(block.vtx.size() == 1);
     for (const CMutableTransaction& tx : txns) {
@@ -286,7 +281,7 @@ CBlock TestChain100Setup::CreateBlock(
     }
     RegenerateCommitments(block, *Assert(m_node.chainman));
 
-    while (!CheckProofOfWork(block.GetHash(), block.nBits, chainparams.GetConsensus())) ++block.nNonce;
+    while (!CheckProofOfWork(block.GetHash(), block.nBits, m_node.chainman->GetConsensus())) ++block.nNonce;
 
     return block;
 }
diff --git a/src/test/validation_block_tests.cpp b/src/test/validation_block_tests.cpp
index 18882929a8..331da691b5 100644
--- a/src/test/validation_block_tests.cpp
+++ b/src/test/validation_block_tests.cpp
@@ -65,7 +65,7 @@ std::shared_ptr<CBlock> MinerTestingSetup::Block(const uint256& prev_hash)
     static int i = 0;
     static uint64_t time = Params().GenesisBlock().nTime;
 
-    auto ptemplate = BlockAssembler(m_node.chainman->ActiveChainstate(), *m_node.mempool, Params()).CreateNewBlock(CScript{} << i++ << OP_TRUE);
+    auto ptemplate = BlockAssembler{m_node.chainman->ActiveChainstate(), *m_node.mempool}.CreateNewBlock(CScript{} << i++ << OP_TRUE);
     auto pblock = std::make_shared<CBlock>(ptemplate->block);
     pblock->hashPrevBlock = prev_hash;
     pblock->nTime = ++time;
@@ -327,7 +327,7 @@ BOOST_AUTO_TEST_CASE(witness_commitment_index)
 {
     CScript pubKey;
     pubKey << 1 << OP_TRUE;
-    auto ptemplate = BlockAssembler(m_node.chainman->ActiveChainstate(), *m_node.mempool, Params()).CreateNewBlock(pubKey);
+    auto ptemplate = BlockAssembler{m_node.chainman->ActiveChainstate(), *m_node.mempool}.CreateNewBlock(pubKey);
     CBlock pblock = ptemplate->block;
 
     CTxOut witness;