Every received block is assigned a unique and increasing identifier, so we know which one to give priority in case of a fork.

Synopsis

Declared in <validation.h>

[[guarded_by(0x7fb95fbca4c8), guarded_by(0x7fb96adf3498), guarded_by(0x7fb96eb26618), guarded_by(0x7fb987167da8)]]
int32_t nBlockSequenceId = SEQ_ID_INIT_FROM_DISK + 1;

Description

Blocks loaded from disk are assigned id SEQ_ID_INIT_FROM_DISK{1} (SEQ_ID_BEST_CHAIN_FROM_DISK{0} if they belong to the best chain loaded from disk), so start the counter after that. *

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