Specify BIP 385: Raw and addr descriptors

Author: achow101

README.mediawiki

@@ -1085,6 +1085,13 @@ Those proposing changes should consider that ultimately consent may rest with th
 | Pieter Wuille, Andrew Chow
 | Informational
 | Draft
+|-
+| [[bip-0385.mediawiki|385]]
+| Applications
+| raw() and addr() Output Script Descriptors
+| Pieter Wuille, Andrew Chow
+| Informational
+| Draft
 |}
 
 <!-- IMPORTANT!  See the instructions at the top of this page, do NOT JUST add BIPs here! -->

bip-0380.mediawiki

@@ -261,4 +261,10 @@ This Table lists all available Script expressions and the BIPs specifying them.
 |-
 | <tt>combo(KEY)</tt>
 | [[bip-0384.mediawiki|384]]
+|-
+| <tt>raw(HEX)</tt>
+| [[bip-0385.mediawiki|385]]
+|-
+| <tt>addr(ADDR)</tt>
+| [[bip-0385.mediawiki|385]]
 |}

bip-0385.mediawiki

@@ -0,0 +1,57 @@
+<pre>
+  BIP: 385
+  Layer: Applications
+  Title: raw() and addr() Output Script Descriptors
+  Author: Pieter Wuille <[email protected]>
+          Andrew Chow <[email protected]>
+  Comments-Summary: No comments yet.
+  Comments-URI: https://github.com/bitcoin/bips/wiki/Comments:BIP-0385
+  Status: Draft
+  Type: Informational
+  Created: 2021-06-27
+  License: BSD-2-Clause
+</pre>
+
+==Abstract==
+
+This document specifies <tt>raw()</tt> and <tt>addr()</tt> output script descriptors.
+<tt>raw()</tt> encapsulates a raw script as a descriptor.
+<tt>addr()</tt> encapsulates an address as a descriptor.
+
+==Copyright==
+
+This BIP is licensed under the BSD 2-clause license.
+
+==Motivation==
+
+In order to make descriptors maximally compatible with scripts in use today, it is useful to be able to wrap any arbitrary output script or an address into a descriptor.
+
+==Specification==
+
+Two new script expressions are defined: <tt>raw()</tt> and <tt>addr()</tt>.
+
+===<tt>raw()</tt>===
+
+The <tt>raw(HEX)</tt> expression can only be used as a top level descriptor.
+As the argument, it takes a hex string representing a Bitcoin script.
+The output script produced by this descriptor is the script represented by <tt>HEX</tt>.
+
+===<tt>addr()</tt>===
+
+The <tt>addr(ADDR)</tt> expression can only be used as a top level descriptor.
+It takes an address as its single argument.
+The output script produced by this descriptor is the output script produced by the address <tt>ADDR</tt>.
+
+==Test Vectors==
+
+TBD
+
+==Backwards Compatibility==
+
+<tt>raw()</tt> and <tt>addr()</tt> descriptors use the format and general operation specified in [[bip-0380.mediawiki|380]].
+As this is a wholly new descriptor, it is not compatible with any implementation.
+The reuse of existing Bitcoin addresses allows for this to be more easily implemented.
+
+==Reference Implemntation==
+
+<tt>raw()</tt> and <tt>addr</tt> descriptors have been implemented in Bitcoin Core since version 0.17.