[#GenTxid]
= GenTxid
:mrdocs:

A transaction identifier that holds either a txid or a wtxid.

== Synopsis

Declared in `<primitives/transaction_identifier.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
class GenTxid
    : public std::variant<Txid, Wtxid>
----

== Base Classes

[cols="1,4"]
|===
| Name| Description
| `std::variant<Txid, Wtxid>`
| 
|===

== Type Aliases

[cols="1"]
|===
| Name
| xref:GenTxid/__trivially_relocatable.adoc[`__trivially_relocatable`] 
|===


== Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:GenTxid/operator_assign-0e.adoc[`operator=`] 
| Assignment operators
| xref:GenTxid/IsWtxid.adoc[`IsWtxid`] 
| Returns true when the identifier holds a wtxid.
| xref:GenTxid/ToUint256.adoc[`ToUint256`] 
| Returns the underlying 256‐bit value, whichever alternative is held.
| xref:GenTxid/emplace-017.adoc[`emplace`] 
| 
| xref:GenTxid/index.adoc[`index`] 
| 
| xref:GenTxid/swap.adoc[`swap`] 
| 
| xref:GenTxid/valueless_by_exception.adoc[`valueless_by_exception`] 
| 
|===


== Using Declarations

[cols="1,4"]
|===
| Name| Description
| xref:GenTxid/GenTxid.adoc[`GenTxid`] 
| Inherits the variant constructors to build from a Txid or Wtxid.
|===


== Friends

[cols="1,4"]
|===
| Name| Description
| `xref:operator_3way-09.adoc[operator<=>]`
| Orders identifiers by kind, then by wrapped value.
|===

== Non-Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:ToGenTxid.adoc[`ToGenTxid`]
| Convert a TX/WITNESS_TX/WTX CInv to a GenTxid.
|===


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