[#PrecomputedTransactionData]
= PrecomputedTransactionData
:mrdocs:

Cached transaction data reused across signature‐hash computations for a single transaction.

== Synopsis

Declared in `<script/interpreter.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
struct PrecomputedTransactionData;
----

== Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:PrecomputedTransactionData/2constructor-02.adoc[`PrecomputedTransactionData`]         [.small]#[constructor]#
| Constructors
| xref:PrecomputedTransactionData/Init.adoc[`Init`] 
| Initialize this PrecomputedTransactionData with transaction data.
|===


== Data Members

[cols="1,4"]
|===
| Name| Description
| xref:PrecomputedTransactionData/hashOutputs.adoc[`hashOutputs`] 
| BIP143 double‐SHA256 hash of all outputs.
| xref:PrecomputedTransactionData/hashPrevouts.adoc[`hashPrevouts`] 
| BIP143 double‐SHA256 hash of all input prevouts.
| xref:PrecomputedTransactionData/hashSequence.adoc[`hashSequence`] 
| BIP143 double‐SHA256 hash of all input sequences.
| xref:PrecomputedTransactionData/m_bip143_segwit_ready.adoc[`m_bip143_segwit_ready`] 
| Whether the 3 fields above are initialized.
| xref:PrecomputedTransactionData/m_bip341_taproot_ready.adoc[`m_bip341_taproot_ready`] 
| Whether the 5 fields above are initialized.
| xref:PrecomputedTransactionData/m_outputs_single_hash.adoc[`m_outputs_single_hash`] 
| BIP341 single‐SHA256 hash of all outputs.
| xref:PrecomputedTransactionData/m_prevouts_single_hash.adoc[`m_prevouts_single_hash`] 
| BIP341 single‐SHA256 hash of all input prevouts.
| xref:PrecomputedTransactionData/m_sequences_single_hash.adoc[`m_sequences_single_hash`] 
| BIP341 single‐SHA256 hash of all input sequences.
| xref:PrecomputedTransactionData/m_spent_amounts_single_hash.adoc[`m_spent_amounts_single_hash`] 
| BIP341 single‐SHA256 hash of all spent output amounts.
| xref:PrecomputedTransactionData/m_spent_outputs.adoc[`m_spent_outputs`] 
| The outputs being spent by this transaction, one per input.
| xref:PrecomputedTransactionData/m_spent_outputs_ready.adoc[`m_spent_outputs_ready`] 
| Whether m_spent_outputs is initialized.
| xref:PrecomputedTransactionData/m_spent_scripts_single_hash.adoc[`m_spent_scripts_single_hash`] 
| BIP341 single‐SHA256 hash of all spent output scriptPubKeys.
|===


== Non-Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:PrecomputePSBTData.adoc[`PrecomputePSBTData`]
| Compute a PrecomputedTransactionData object from a psbt.
|===


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