[#BlockFilter-2constructor-02e]
= xref:BlockFilter.adoc[BlockFilter]::BlockFilter
:relfileprefix: ../
:mrdocs:

Constructors

== Synopses

Declared in `<blockfilter.h>`

Construct an empty BlockFilter.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
constexpr
xref:BlockFilter/2constructor-0f.adoc[BlockFilter]() = default;
----

[.small]#xref:BlockFilter/2constructor-0f.adoc[_» more..._]#

Construct a new BlockFilter of the specified type from a block.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:BlockFilter/2constructor-04.adoc[BlockFilter](
    xref:BlockFilterType.adoc[BlockFilterType] filter_type,
    xref:CBlock.adoc[CBlock] const& block,
    xref:CBlockUndo.adoc[CBlockUndo] const& block_undo);
----

[.small]#xref:BlockFilter/2constructor-04.adoc[_» more..._]#

Reconstruct a BlockFilter from parts.


[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
xref:BlockFilter/2constructor-025.adoc[BlockFilter](
    xref:BlockFilterType.adoc[BlockFilterType] filter_type,
    xref:uint256.adoc[uint256] const& block_hash,
    std::vector<unsigned char> filter,
    bool skip_decode_check);
----

[.small]#xref:BlockFilter/2constructor-025.adoc[_» more..._]#

== Parameters

[cols="1,4"]
|===
| Name| Description
| *filter_type*
| The type of filter to build.
| *block*
| The block to build the filter from.
| *block_undo*
| Undo data for the block, providing spent outputs.
| *block_hash*
| Hash of the block this filter is for.
| *filter*
| The serialized filter contents.
| *skip_decode_check*
| If true, skip validating the encoded filter.
|===


[.small]#Created with https://www.mrdocs.com[MrDocs]#