minimize diffs

Author: richardkiss

chia/full_node/block_store.py

@@ -231,25 +231,6 @@ def rollback_cache_block(self, header_hash: bytes32) -> None:
             # block to the cache yet
             pass
 
-    async def get_prev_hash(self, header_hash: bytes32) -> bytes32:
-        """
-        Returns the header hash preceeding the input header hash.
-        Throws an exception if the block is not present
-        """
-        cached = self.block_cache.get(header_hash)
-        if cached is not None:
-            return cached.prev_header_hash
-
-        async with self.db_wrapper.reader_no_transaction() as conn:
-            async with conn.execute(
-                "SELECT prev_hash FROM full_blocks WHERE header_hash=?",
-                (header_hash,),
-            ) as cursor:
-                row = await cursor.fetchone()
-                if row is None:
-                    raise KeyError("missing block in chain")
-                return bytes32(row[0])
-
     async def get_full_block(self, header_hash: bytes32) -> Optional[FullBlock]:
         cached: Optional[FullBlock] = self.block_cache.get(header_hash)
         if cached is not None:
@@ -397,6 +378,25 @@ async def get_block_records_by_hash(self, header_hashes: list[bytes32]) -> list[
             ret.append(all_blocks[hh])
         return ret
 
+    async def get_prev_hash(self, header_hash: bytes32) -> bytes32:
+        """
+        Returns the header hash preceeding the input header hash.
+        Throws an exception if the block is not present
+        """
+        cached = self.block_cache.get(header_hash)
+        if cached is not None:
+            return cached.prev_header_hash
+
+        async with self.db_wrapper.reader_no_transaction() as conn:
+            async with conn.execute(
+                "SELECT prev_hash FROM full_blocks WHERE header_hash=?",
+                (header_hash,),
+            ) as cursor:
+                row = await cursor.fetchone()
+                if row is None:
+                    raise KeyError("missing block in chain")
+                return bytes32(row[0])
+
     async def get_block_bytes_by_hash(self, header_hashes: list[bytes32]) -> list[bytes]:
         """
         Returns a list of Full Blocks block blobs, ordered by the same order in which header_hashes are passed in.