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The current implementation of
get_pow_block_at_terminal_total_difficulty
will raise an exception on any chain (e.g., mainnet) if thepow_chain
contains only the genesis block (e.g., unsynced node). This is becausegenesis_block.parent_hash == Hash32()
andHash32()
is not inpow_chain
.This change also makes allowances for networks where the
TERMINAL_TOTAL_DIFFICULTY
is reached at the genesis block.There's an alternative version of this fix which does not allow for a network where TTD is met at genesis: f6ed352.