[CHIA-3654] previous transaction block height in BlockTools (#19962)

previous transaction block height in BlockTools

Author: arvidn

chia/simulator/block_tools.py

@@ -965,7 +965,6 @@ def get_consecutive_blocks(
                         block_list.append(full_block)
 
                         if include_transactions:
-                            prev_tx_height = full_block.height
                             for coin in full_block.get_included_reward_coins():
                                 if coin.puzzle_hash == self.farmer_ph:
                                     pending_rewards.append(coin)
@@ -979,6 +978,7 @@ def get_consecutive_blocks(
 
                         if full_block.transactions_generator is not None:
                             tx_block_heights.append(full_block.height)
+                            prev_tx_height = full_block.height
 
                         blocks_added_this_sub_slot += 1
                         blocks[full_block.header_hash] = block_record
@@ -1259,7 +1259,6 @@ def get_consecutive_blocks(
                         block_list.append(full_block)
 
                         if include_transactions:
-                            prev_tx_height = full_block.height
                             for coin in full_block.get_included_reward_coins():
                                 if coin.puzzle_hash == self.farmer_ph:
                                     pending_rewards.append(coin)
@@ -1273,6 +1272,7 @@ def get_consecutive_blocks(
 
                         if full_block.transactions_generator is not None:
                             tx_block_heights.append(full_block.height)
+                            prev_tx_height = full_block.height
 
                         blocks_added_this_sub_slot += 1
                         blocks[full_block.header_hash] = block_record
@@ -1759,6 +1759,7 @@ def load_block_list(
     sub_slot_iters = uint64(constants.SUB_SLOT_ITERS_STARTING)
     height_to_hash: dict[uint32, bytes32] = {}
     blocks: dict[bytes32, BlockRecord] = {}
+    prev_transaction_b_height = uint32(0)
     for full_block in block_list:
         if full_block.height != 0:
             if len(full_block.finished_sub_slots) > 0:
@@ -1775,7 +1776,6 @@ def load_block_list(
             sp_hash = full_block.reward_chain_block.challenge_chain_sp_vdf.output.get_hash()
 
         cache = BlockCache(blocks)
-        prev_transaction_b_height = uint32(0)  # TODO: todo_v2_plots
 
         required_iters = validate_pospace_and_get_required_iters(
             constants,
@@ -1789,6 +1789,9 @@ def load_block_list(
         )
         assert required_iters is not None
 
+        if full_block.is_transaction_block():
+            prev_transaction_b_height = full_block.height
+
         blocks[full_block.header_hash] = block_to_block_record(
             constants,
             cache,