# HIP304 - z\_signmessage + z\_verifymessage

```
  HIP: 304
  Title: Signing and verifying messages from Sapling addresses
  Author: Duke Leto
  Category: Standards
  Created: 2020-02-02
  License: GPLv3
```

# Terminology

The key words "MUST", "MUST NOT", and "MAY" in this document are to be interpreted as described in RFC 2119.
[#RFC2119]

# Abstract

This is an xxx HIP describing signed Sapling messages.

# Motivation

TLDR: Extend the `signmessage` and `verifymessage` RPCs to Sapling shielded addresses.

# Specification

This document specifies two new RPCs

    z_signmessage
    z_verifymessage

which are direct shielded counterparts to the original Bitcoin RPCs:

    signmessage
    verifymessage


# References

.. [#RFC2119] `Key words for use in RFCs to Indicate Requirement Levels <https://tools.ietf.org/html/rfc2119>`_
.. [#BIP32] `Hierarchical Deterministic Wallets <https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki>`_