[#TxGraph-CompareMainOrder]
= xref:TxGraph.adoc[TxGraph]::CompareMainOrder
:relfileprefix: ../
:mrdocs:

Compare two transactions according to their order in the main graph. Both transactions must be in the main graph. The main graph must not be oversized.

== Synopsis

Declared in `<txgraph.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
virtual
std::strong_ordering
CompareMainOrder(
    xref:TxGraph/Ref.adoc[Ref] const& a,
    xref:TxGraph/Ref.adoc[Ref] const& b) noexcept = 0;
----

== Return Value

The ordering of a relative to b in the main graph's linearization.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *a*
| First transaction to compare.
| *b*
| Second transaction to compare.
|===


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