Move Hashers to util/hasher.{cpp/h}

Move the hashers that we use for hash tables to a common place.

Moved hashers:
- SaltedTxidHasher
- SaltedOutpointHasher
- FilterHeaderHasher
- SignatureCacheHasher
- BlockHasher

1 files changed, 1 insertions, 8 deletions

diff --git a/src/validation.h b/src/validation.h
index 3d9fa92c15..a3dc0b75af 100644
--- a/src/validation.h
+++ b/src/validation.h
@@ -23,6 +23,7 @@
 #include <txdb.h>
 #include <versionbits.h>
 #include <serialize.h>
+#include <util/hasher.h>
 
 #include <atomic>
 #include <map>
@@ -94,14 +95,6 @@ static const unsigned int DEFAULT_CHECKLEVEL = 3;
 // Setting the target to >= 550 MiB will make it likely we can respect the target.
 static const uint64_t MIN_DISK_SPACE_FOR_BLOCK_FILES = 550 * 1024 * 1024;
 
-struct BlockHasher
-{
-    // this used to call `GetCheapHash()` in uint256, which was later moved; the
-    // cheap hash function simply calls ReadLE64() however, so the end result is
-    // identical
-    size_t operator()(const uint256& hash) const { return ReadLE64(hash.begin()); }
-};
-
 /** Current sync state passed to tip changed callbacks. */
 enum class SynchronizationState {
     INIT_REINDEX,