BIP: 80
Title: Hierarchy for Non-Colored Voting Pool Deterministic Multisig Wallets
Author: Justus Ranvier <[email protected]>
Jimmy Song <[email protected]>
Comments-Summary: No comments yet.
Comments-URI: https://github.com/bitcoin/bips/wiki/Comments:BIP 80
Status: Deferred
Type: Informational
Created: 2014-08-11
License: PDAbstract
This BIP defines a logical hierarchy for non-colored voting pool deterministic multisig wallets based on an algorithm described in BIP 32 (BIP 32 from now on) and purpose scheme described in BIP 43 (BIP 43 from now on).
This BIP is a particular application of BIP 43 and is based on BIP 44.
Motivation
The hierarchy proposed in this paper allows the handling of multiple coins and multiple series from a single seed.
Path levels
We define the following 4 levels in BIP 32 path:
m / purpose' / coin_type' / series' / address_indexApostrophe in the path indicates that BIP 32 hardened derivation is used.
Each level has a special meaning, described in the chapters below.
Purpose
Purpose is a constant set following the BIP 43 recommendation to: the ASCII value of "80" with the most significant bit set to indicate hardened derivation (0x80000050). It indicates that the subtree of this node is used according to this specification.
Hardened derivation is used at this level.
Coin type
One master node (seed) can be used for unlimited number of independent cryptocoins such as Bitcoin, Litecoin or Namecoin. However, sharing the same space for various cryptocoins has some disadvantages.
This level creates a separate subtree for every cryptocoin, avoiding reusing addresses across cryptocoins and improving privacy issues.
Coin type is a constant, set for each cryptocoin. The list of registered coin type constants should be obtained from BIP 44.
Hardened derivation is used at this level.
Series
Series are used by voting pools in order to implement FIFO cold storage. By directing deposits into multiple series, the private keys for most of the deposits can be kept offline, and a limited portion can be brought online to process withdrawals.
Hardened derivation is used at this level.
Index
Public/private keypairs are numbered from index 0 in sequentially increasing manner. This number is used as child index in BIP 32 derivation.
Public keys obtained at this level of the hierarchy are used to construct multisig deposit scripts, using a schema that is shared between the members as an out-of-band contract.
Public derivation is used at this level.
Compatible wallets
- btcwallet is the reference Bitcoin wallet for voting pools.
Copyright
This document is placed in the public domain.
