[#CBlockIndex-nSequenceId]
= xref:CBlockIndex.adoc[CBlockIndex]::nSequenceId
:relfileprefix: ../
:mrdocs:

(memory only) Sequential id assigned to distinguish order in which blocks are received. Initialized to SEQ_ID_INIT_FROM_DISK{1} when loading blocks from disk, except for blocks belonging to the best chain which overwrite it to SEQ_ID_BEST_CHAIN_FROM_DISK{0}.

== Synopsis

Declared in `<chain.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int32_t nSequenceId = {SEQ_ID_INIT_FROM_DISK};
----


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