Merge bitcoin/bitcoin#25704: refactor: Remove almost all validation option globals

aaaa7bd0ba iwyu: Add missing includes (MacroFake)
fa9ebec096 Remove g_parallel_script_checks (MacroFake)
fa7c834b9f Move ::fCheckBlockIndex into ChainstateManager (MacroFake)
fa43188d86 Move ::fCheckpointsEnabled into ChainstateManager (MacroFake)
cccca83099 Move ::nMinimumChainWork into ChainstateManager (MacroFake)
fa29d0b57c Move ::hashAssumeValid into ChainstateManager (MacroFake)
faf44876db Move ::nMaxTipAge into ChainstateManager (MacroFake)

Pull request description:

  It seems preferable to assign globals to a class (in this case `ChainstateManager`), than to leave them dangling. This should clarify scope for code-readers, as well as clarifying unit test behaviour.

ACKs for top commit:
  dergoegge:
    Code review ACK aaaa7bd0ba
  ryanofsky:
    Code review ACK aaaa7bd0ba. No changes since last review, other than rebase
  aureleoules:
    reACK aaaa7bd0ba

Tree-SHA512: 83ec3ba0fb4f1dad95810d4bd4e578454e0718dc1bdd3a794cc4e48aa819b6f5dad4ac4edab3719bdfd5f89cbe23c2740a50fd56c1ff81c99e521c5f6d4e898d

src/node/chainstate.cpp

@@ -4,9 +4,11 @@
 
 #include <node/chainstate.h>
 
+#include <arith_uint256.h>
 #include <chain.h>
 #include <coins.h>
 #include <consensus/params.h>
+#include <logging.h>
 #include <node/blockstorage.h>
 #include <node/caches.h>
 #include <sync.h>
@@ -21,6 +23,7 @@
 #include <algorithm>
 #include <atomic>
 #include <cassert>
+#include <limits>
 #include <memory>
 #include <vector>
 
@@ -32,13 +35,13 @@ ChainstateLoadResult LoadChainstate(ChainstateManager& chainman, const CacheSize
         return options.reindex || options.reindex_chainstate || chainstate->CoinsTip().GetBestBlock().IsNull();
     };
 
-    if (!hashAssumeValid.IsNull()) {
-        LogPrintf("Assuming ancestors of block %s have valid signatures.\n", hashAssumeValid.GetHex());
+    if (!chainman.AssumedValidBlock().IsNull()) {
+        LogPrintf("Assuming ancestors of block %s have valid signatures.\n", chainman.AssumedValidBlock().GetHex());
     } else {
         LogPrintf("Validating signatures for all blocks.\n");
     }
-    LogPrintf("Setting nMinimumChainWork=%s\n", nMinimumChainWork.GetHex());
-    if (nMinimumChainWork < UintToArith256(chainman.GetConsensus().nMinimumChainWork)) {
+    LogPrintf("Setting nMinimumChainWork=%s\n", chainman.MinimumChainWork().GetHex());
+    if (chainman.MinimumChainWork() < UintToArith256(chainman.GetConsensus().nMinimumChainWork)) {
         LogPrintf("Warning: nMinimumChainWork set below default value of %s\n", chainman.GetConsensus().nMinimumChainWork.GetHex());
     }
     if (nPruneTarget == std::numeric_limits<uint64_t>::max()) {

src/node/chainstatemanager_args.cpp

@@ -0,0 +1,39 @@
+// Copyright (c) 2022 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <node/chainstatemanager_args.h>
+
+#include <arith_uint256.h>
+#include <tinyformat.h>
+#include <uint256.h>
+#include <util/strencodings.h>
+#include <util/system.h>
+#include <util/translation.h>
+#include <validation.h>
+
+#include <chrono>
+#include <optional>
+#include <string>
+
+namespace node {
+std::optional<bilingual_str> ApplyArgsManOptions(const ArgsManager& args, ChainstateManager::Options& opts)
+{
+    if (auto value{args.GetBoolArg("-checkblockindex")}) opts.check_block_index = *value;
+
+    if (auto value{args.GetBoolArg("-checkpoints")}) opts.checkpoints_enabled = *value;
+
+    if (auto value{args.GetArg("-minimumchainwork")}) {
+        if (!IsHexNumber(*value)) {
+            return strprintf(Untranslated("Invalid non-hex (%s) minimum chain work value specified"), *value);
+        }
+        opts.minimum_chain_work = UintToArith256(uint256S(*value));
+    }
+
+    if (auto value{args.GetArg("-assumevalid")}) opts.assumed_valid_block = uint256S(*value);
+
+    if (auto value{args.GetIntArg("-maxtipage")}) opts.max_tip_age = std::chrono::seconds{*value};
+
+    return std::nullopt;
+}
+} // namespace node

src/node/chainstatemanager_args.h

@@ -0,0 +1,19 @@
+// Copyright (c) 2022 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_NODE_CHAINSTATEMANAGER_ARGS_H
+#define BITCOIN_NODE_CHAINSTATEMANAGER_ARGS_H
+
+#include <validation.h>
+
+#include <optional>
+
+class ArgsManager;
+struct bilingual_str;
+
+namespace node {
+std::optional<bilingual_str> ApplyArgsManOptions(const ArgsManager& args, ChainstateManager::Options& opts);
+} // namespace node
+
+#endif // BITCOIN_NODE_CHAINSTATEMANAGER_ARGS_H