BIP: 385
Layer: Applications
Title: raw() and addr() Output Script Descriptors
Author: Pieter Wuille
Ava Chow
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
==Abstract==
This document specifies raw() and addr() output script descriptors.
raw() encapsulates a raw script as a descriptor.
addr() 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: raw() and addr().
===raw()===
The raw(HEX) 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 HEX.
===addr()===
The addr(ADDR) 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 ADDR.
==Test Vectors==
Valid descriptors followed by the scripts they produce.
* raw(deadbeef)
** deadbeef
* raw(512103a34b99f22c790c4e36b2b3c2c35a36db06226e41c692fc82b8b56ac1c540c5bd4104a34b99f22c790c4e36b2b3c2c35a36db06226e41c692fc82b8b56ac1c540c5bd5b8dec5235a0fa8722476c7709c02559e3aa73aa03918ba2d492eea75abea23552ae)
** 512103a34b99f22c790c4e36b2b3c2c35a36db06226e41c692fc82b8b56ac1c540c5bd4104a34b99f22c790c4e36b2b3c2c35a36db06226e41c692fc82b8b56ac1c540c5bd5b8dec5235a0fa8722476c7709c02559e3aa73aa03918ba2d492eea75abea23552ae
* raw(a9149a4d9901d6af519b2a23d4a2f51650fcba87ce7b87)
** a9149a4d9901d6af519b2a23d4a2f51650fcba87ce7b87
* addr(3PUNyaW7M55oKWJ3kDukwk9bsKvryra15j)
** a914eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee87
Invalid descriptors
* Non-hex script: raw(asdf)
* Invalid address: addr(asdf)
* raw nested in sh: sh(raw(deadbeef))
* raw nested in wsh: wsh(raw(deadbeef))
* addr nested in sh: sh(addr(3PUNyaW7M55oKWJ3kDukwk9bsKvryra15j))
* addr nested in wsh: wsh(addr(3PUNyaW7M55oKWJ3kDukwk9bsKvryra15j))
==Backwards Compatibility==
raw() and addr() 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 Implementation==
raw() and addr() descriptors have been implemented in Bitcoin Core since version 0.17.