BIP: 84 Layer: Applications Title: Derivation scheme for P2WPKH based accounts Author: Pavol Rusnak <[email protected]> Comments-Summary: No comments yet. Comments-URI: https://github.com/bitcoin/bips/wiki/Comments:BIP-0084 Status: Final Type: Standards Track Created: 2017-12-28 License: CC0-1.0
This BIP defines the derivation scheme for HD wallets using the P2WPKH (BIP 173) serialization format for segregated witness transactions.
With the usage of P2WPKH transactions it is necessary to have a common derivation scheme. It allows the user to use different HD wallets with the same masterseed and/or a single account seamlessly.
Thus the user needs to create dedicated segregated witness accounts, which ensures that only wallets compatible with this BIP will detect the accounts and handle them appropriately.
We use the same rationale as described in Considerations section of BIP 49.
This BIP defines the two needed steps to derive multiple deterministic addresses based on a BIP 32 root account.
To derive a public key from the root account, this BIP uses the same account-structure as defined in BIP 44 and BIP 49, but only uses a different purpose value to indicate the different transaction serialization method.
m / purpose' / coin_type' / account' / change / address_index
For the purpose-path level it uses 84'. The rest of the levels are used as defined in BIP44 or BIP49.
To derive the P2WPKH address from the above calculated public key, we use the encapsulation defined in BIP 141:
witness: <signature> <pubkey>
scriptSig: (empty)
scriptPubKey: 0 <20-byte-key-hash>
(0x0014{20-byte-key-hash})
When serializing extended keys, this scheme uses alternate version bytes. Extended public keys use 0x04b24746 to produce a "zpub" prefix, and private keys use 0x04b2430c to produce a "zprv" prefix. Testnet uses 0x045f1cf6 "vpub" and 0x045f18bc "vprv."
Additional registered version bytes are listed in SLIP-0132.
This BIP is not backwards compatible by design as described under considerations. An incompatible wallet will not discover accounts at all and the user will notice that something is wrong.
mnemonic = abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon about rootpriv = zprvAWgYBBk7JR8Gjrh4UJQ2uJdG1r3WNRRfURiABBE3RvMXYSrRJL62XuezvGdPvG6GFBZduosCc1YP5wixPox7zhZLfiUm8aunE96BBa4Kei5 rootpub = zpub6jftahH18ngZxLmXaKw3GSZzZsszmt9WqedkyZdezFtWRFBZqsQH5hyUmb4pCEeZGmVfQuP5bedXTB8is6fTv19U1GQRyQUKQGUTzyHACMF // Account 0, root = m/84'/0'/0' xpriv = zprvAdG4iTXWBoARxkkzNpNh8r6Qag3irQB8PzEMkAFeTRXxHpbF9z4QgEvBRmfvqWvGp42t42nvgGpNgYSJA9iefm1yYNZKEm7z6qUWCroSQnE xpub = zpub6rFR7y4Q2AijBEqTUquhVz398htDFrtymD9xYYfG1m4wAcvPhXNfE3EfH1r1ADqtfSdVCToUG868RvUUkgDKf31mGDtKsAYz2oz2AGutZYs // Account 0, first receiving address = m/84'/0'/0'/0/0 privkey = KyZpNDKnfs94vbrwhJneDi77V6jF64PWPF8x5cdJb8ifgg2DUc9d pubkey = 0330d54fd0dd420a6e5f8d3624f5f3482cae350f79d5f0753bf5beef9c2d91af3c address = bc1qcr8te4kr609gcawutmrza0j4xv80jy8z306fyu // Account 0, second receiving address = m/84'/0'/0'/0/1 privkey = Kxpf5b8p3qX56DKEe5NqWbNUP9MnqoRFzZwHRtsFqhzuvUJsYZCy pubkey = 03e775fd51f0dfb8cd865d9ff1cca2a158cf651fe997fdc9fee9c1d3b5e995ea77 address = bc1qnjg0jd8228aq7egyzacy8cys3knf9xvrerkf9g // Account 0, first change address = m/84'/0'/0'/1/0 privkey = KxuoxufJL5csa1Wieb2kp29VNdn92Us8CoaUG3aGtPtcF3AzeXvF pubkey = 03025324888e429ab8e3dbaf1f7802648b9cd01e9b418485c5fa4c1b9b5700e1a6 address = bc1q8c6fshw2dlwun7ekn9qwf37cu2rn755upcp6el
- BIP32 - Hierarchical Deterministic Wallets
- BIP43 - Purpose Field for Deterministic Wallets
- BIP44 - Multi-Account Hierarchy for Deterministic Wallets
- BIP49 - Derivation scheme for P2WPKH-nested-in-P2SH based accounts
- BIP141 - Segregated Witness (Consensus layer)
- BIP173 - Base32 address format for native v0-16 witness outputs