[#ScriptCompression]
= ScriptCompression
:mrdocs:

Compact serializer for scripts.

== Synopsis

Declared in `<compressor.h>`

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

== Description

It detects common cases and encodes them much more efficiently. 3 special cases are defined: * Pay to pubkey hash (encoded as 21 bytes) * Pay to script hash (encoded as 21 bytes) * Pay to pubkey starting with 0x02, 0x03 or 0x04 (encoded as 33 bytes)

Other scripts up to 121 bytes require 1 byte + script length. Above that, scripts up to 16505 bytes require 2 bytes + script length.

== Member Functions

[cols="1,4"]
|===
| Name| Description
| xref:ScriptCompression/Ser.adoc[`Ser`] 
| Serializes a script to the stream using the compact encoding.
| xref:ScriptCompression/Unser.adoc[`Unser`] 
| Deserializes a compact‐encoded script from the stream.
|===


== Static Data Members

[cols="1,4"]
|===
| Name| Description
| xref:ScriptCompression/nSpecialScripts.adoc[`nSpecialScripts`] 
| make this static for now (there are only 6 special scripts defined) this can potentially be extended together with a new version for transactions, in which case this value becomes dependent on version and nHeight of the enclosing transaction.
|===



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