Merge bitcoin/bitcoin#26235: refactor: move *index constants out of validation

7d14577 refactor: move DEFAULT_BLOCKFILTERINDEX from val to blockfilterindex (fanquake)
c87d569 refactor: move DEFAULT_COINSTATSINDEX from validation to coinstatsindex (fanquake)
2bfc1e6 refactor: move DEFAULT_TXINDEX from validation to txindex (fanquake)

Pull request description:

  Move `*index` default constants out of `validation.h`.

ACKs for top commit:
  stickies-v:
    re-ACK 7d14577
  aureleoules:
    ACK 7d14577

Tree-SHA512: 3021db1a63ceb714dee4b91f755d1fb9a6633adb6f1081e34e4179900e7543e3a7b06fe47507d580a3a2caf52f7ede784cb36716d521c76b0404bdc798f0186a

Author: MacroFake

src/index/blockfilterindex.h

@@ -12,6 +12,8 @@
 #include <index/base.h>
 #include <util/hasher.h>
 
+static const char* const DEFAULT_BLOCKFILTERINDEX = "0";
+
 /** Interval between compact filter checkpoints. See BIP 157. */
 static constexpr int CFCHECKPT_INTERVAL = 1000;
 

src/index/coinstatsindex.h

@@ -14,6 +14,8 @@ namespace kernel {
 struct CCoinsStats;
 }
 
+static constexpr bool DEFAULT_COINSTATSINDEX{false};
+
 /**
  * CoinStatsIndex maintains statistics on the UTXO set.
  */

src/index/txindex.h

@@ -7,6 +7,8 @@
 
 #include <index/base.h>
 
+static constexpr bool DEFAULT_TXINDEX{false};
+
 /**
  * TxIndex is used to look up transactions included in the blockchain by hash.
  * The index is written to a LevelDB database and records the filesystem

src/node/caches.cpp

@@ -4,9 +4,9 @@
 
 #include <node/caches.h>
 
+#include <index/txindex.h>
 #include <txdb.h>
 #include <util/system.h>
-#include <validation.h>
 
 namespace node {
 CacheSizes CalculateCacheSizes(const ArgsManager& args, size_t n_indexes)

src/validation.h

@@ -65,9 +65,6 @@ static const int MAX_SCRIPTCHECK_THREADS = 15;
 static const int DEFAULT_SCRIPTCHECK_THREADS = 0;
 static const int64_t DEFAULT_MAX_TIP_AGE = 24 * 60 * 60;
 static const bool DEFAULT_CHECKPOINTS_ENABLED = true;
-static const bool DEFAULT_TXINDEX = false;
-static constexpr bool DEFAULT_COINSTATSINDEX{false};
-static const char* const DEFAULT_BLOCKFILTERINDEX = "0";
 /** Default for -stopatheight */
 static const int DEFAULT_STOPATHEIGHT = 0;
 /** Block files containing a block-height within MIN_BLOCKS_TO_KEEP of ActiveChain().Tip() will not be pruned. */