[#TxIndex-01-FindTx]
= xref:TxIndex-01.adoc[TxIndex]::FindTx
:relfileprefix: ../
:mrdocs:

Look up a transaction by hash.

== Synopsis

Declared in `<index/txindex.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
std::optional<TxIndexResult>
FindTx(xref:Txid.adoc[Txid] const& tx_hash) const;
----

== Return Value

the transaction and containing block hash, or nullopt if it is not found

== Parameters

[cols="1,4"]
|===
| Name| Description
| *tx_hash* [in]
| The hash of the transaction to be returned.
|===


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