[#btck_chain_contains]
= btck_chain_contains
:mrdocs:

Return true if the passed in chain contains the block tree entry.

== Synopsis

Declared in `<kernel/bitcoinkernel.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
[[__nonnull__]]
int
btck_chain_contains(
    xref:btck_Chain-09.adoc[btck_Chain] const* chain,
    xref:btck_BlockTreeEntry-0c.adoc[btck_BlockTreeEntry] const* block_tree_entry);
----

== Return Value

1 if the block_tree_entry is in the chain, 0 otherwise.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *chain* [in]
| Non‐null.
| *block_tree_entry* [in]
| Non‐null.
|===


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