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https://github.com/Chia-Network/chia-blockchain.git
synced 2026-08-28 18:14:19 -05:00
Almog De PazandGitHub
4e36460622
* get_flags, fix pre_sp_tx_block, test * genesis case for get_flags * block height for flags below fork
45 lines
1.9 KiB
Python
45 lines
1.9 KiB
Python
# Returns the previous transaction block up to the blocks signage point
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# we use this for block validation since when the block is farmed we do not know the latest transaction block
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# since a new one might be infused by the time the block is infused
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from __future__ import annotations
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from chia_rs import ConsensusConstants, FullBlock, get_flags_for_height_and_constants
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from chia.consensus.blockchain_interface import BlocksProtocol
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from chia.consensus.pot_iterations import is_overflow_block
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async def get_flags(
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constants: ConsensusConstants,
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blocks: BlocksProtocol,
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block: FullBlock,
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) -> int:
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if block.height < constants.HARD_FORK2_HEIGHT:
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return get_flags_for_height_and_constants(block.height, constants)
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if block.height >= constants.HARD_FORK2_HEIGHT + constants.SUB_EPOCH_BLOCKS:
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return get_flags_for_height_and_constants(block.height, constants)
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if block.prev_header_hash == constants.GENESIS_CHALLENGE:
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return get_flags_for_height_and_constants(0, constants)
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sp_index = block.reward_chain_block.signage_point_index
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# For overflow blocks, the SP is in the previous sub-slot, so we need to cross
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# one extra slot boundary before we're past the SP's slot
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overflow = is_overflow_block(constants, sp_index)
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slots_crossed = len(block.finished_sub_slots)
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curr = await blocks.get_block_record_from_db(block.prev_header_hash)
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assert curr is not None
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while curr.height > 0:
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if not overflow:
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before_sp = curr.signage_point_index < sp_index or slots_crossed > 0
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else:
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before_sp = slots_crossed >= 2 or (slots_crossed == 1 and curr.signage_point_index < sp_index)
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if curr.is_transaction_block and before_sp:
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break
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if curr.first_in_sub_slot:
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slots_crossed += 1
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curr = await blocks.get_block_record_from_db(curr.prev_hash)
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assert curr is not None
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return get_flags_for_height_and_constants(curr.height, constants)
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