BIPs bitcoin improvement proposals

Bitcoin Improvement Proposals

People wishing to submit BIPs, first should propose their idea or document to the bitcoin-dev@lists.linuxfoundation.org mailing list (do not assign a number - read BIP 2 for the full process). After discussion, please open a PR. After copy-editing and acceptance, it will be published here.

We are fairly liberal with approving BIPs, and try not to be too involved in decision making on behalf of the community. The exception is in very rare cases of dispute resolution when a decision is contentious and cannot be agreed upon. In those cases, the conservative option will always be preferred.

Having a BIP here does not make it a formally accepted standard until its status becomes Final or Active.

Those proposing changes should consider that ultimately consent may rest with the consensus of the Bitcoin users (see also: economic majority).

# Layer Title Owner Type Status
1 BIP Purpose and Guidelines Amir Taaki <genjix@riseup.net> Process Replaced
2 BIP process, revised Luke Dashjr <luke+bip@dashjr.org> Process Active
8 Version bits with lock-in by height Shaolin Fry <shaolinfry@protonmail.ch>, Luke Dashjr <luke+bip@dashjr.org> Informational Draft
9 Version bits with timeout and delay Pieter Wuille <pieter.wuille@gmail.com>, Peter Todd <pete@petertodd.org>, Greg Maxwell <greg@xiph.org>, Rusty Russell <rusty@rustcorp.com.au> Informational Final
10 Applications Multi-Sig Transaction Distribution Alan Reiner <etotheipi@gmail.com> Informational Withdrawn
11 Applications M-of-N Standard Transactions Gavin Andresen <gavinandresen@gmail.com> Standards Track Final
12 Consensus (soft fork) OP_EVAL Gavin Andresen <gavinandresen@gmail.com> Standards Track Withdrawn
13 Applications Address Format for pay-to-script-hash Gavin Andresen <gavinandresen@gmail.com> Standards Track Final
14 Peer Services Protocol Version and User Agent Amir Taaki <genjix@riseup.net>, Patrick Strateman <bitcoin-bips@covertinferno.org> Standards Track Final
15 Applications Aliases Amir Taaki <genjix@riseup.net> Standards Track Deferred
16 Consensus (soft fork) Pay to Script Hash Gavin Andresen <gavinandresen@gmail.com> Standards Track Final
17 Consensus (soft fork) OP_CHECKHASHVERIFY (CHV) Luke Dashjr <luke+bip17@dashjr.org> Standards Track Withdrawn
18 Consensus (soft fork) hashScriptCheck Luke Dashjr <luke+bip17@dashjr.org> Standards Track Proposed
19 Applications M-of-N Standard Transactions (Low SigOp) Luke Dashjr <luke+bip17@dashjr.org> Standards Track Rejected
20 Applications URI Scheme Luke Dashjr <luke+bip@dashjr.org> Standards Track Replaced
21 Applications URI Scheme Nils Schneider <nils.schneider@gmail.com>, Matt Corallo <bip21@bluematt.me> Standards Track Final
22 API/RPC getblocktemplate - Fundamentals Luke Dashjr <luke+bip22@dashjr.org> Standards Track Final
23 API/RPC getblocktemplate - Pooled Mining Luke Dashjr <luke+bip22@dashjr.org> Standards Track Final
30 Consensus (soft fork) Duplicate transactions Pieter Wuille <pieter.wuille@gmail.com> Standards Track Final
31 Peer Services Pong message Mike Hearn <hearn@google.com> Standards Track Final
32 Applications Hierarchical Deterministic Wallets Pieter Wuille <pieter.wuille@gmail.com> Informational Final
33 Peer Services Stratized Nodes Amir Taaki <genjix@riseup.net> Standards Track Rejected
34 Consensus (soft fork) Block v2, Height in Coinbase Gavin Andresen <gavinandresen@gmail.com> Standards Track Final
35 Peer Services mempool message Jeff Garzik <jgarzik@exmulti.com> Standards Track Final
36 Peer Services Custom Services Stefan Thomas <justmoon@members.fsf.org> Standards Track Rejected
37 Peer Services Connection Bloom filtering Mike Hearn <hearn@google.com>, Matt Corallo <bip37@bluematt.me> Standards Track Final
38 Applications Passphrase-protected private key Mike Caldwell <mcaldwell@swipeclock.com>, Aaron Voisine <voisine@gmail.com> Standards Track Draft (Some confusion applies
39 Applications Mnemonic code for generating deterministic keys Marek Palatinus <slush@satoshilabs.com>, Pavol Rusnak <stick@satoshilabs.com>, Aaron Voisine <voisine@gmail.com>, Sean Bowe <ewillbefull@gmail.com> Standards Track Proposed
42 Consensus (soft fork) A finite monetary supply for Bitcoin Pieter Wuille <pieter.wuille@gmail.com> Standards Track Final
43 Applications Purpose Field for Deterministic Wallets Marek Palatinus <slush@satoshilabs.com>, Pavol Rusnak <stick@satoshilabs.com> Informational Final
44 Applications Multi-Account Hierarchy for Deterministic Wallets Marek Palatinus <slush@satoshilabs.com>, Pavol Rusnak <stick@satoshilabs.com> Standards Track Proposed
45 Applications Structure for Deterministic P2SH Multisignature Wallets Manuel Araoz <manu@bitpay.com>, Ryan X. Charles <ryan@bitpay.com>, Matias Alejo Garcia <matias@bitpay.com> Standards Track Proposed
47 Applications Reusable Payment Codes for Hierarchical Deterministic Wallets Justus Ranvier <justus@openbitcoinprivacyproject.org> Informational Draft
48 Applications Multi-Script Hierarchy for Multi-Sig Wallets Fontaine <dentondevelopment@protonmail.com> Standards Track Proposed
49 Applications Derivation scheme for P2WPKH-nested-in-P2SH based accounts Daniel Weigl <DanielWeigl@gmx.at> Informational Final
50 March 2013 Chain Fork Post-Mortem Gavin Andresen <gavinandresen@gmail.com> Informational Final
60 Peer Services Fixed Length "version" Message (Relay-Transactions Field) Amir Taaki <genjix@riseup.net> Standards Track Draft
61 Peer Services Reject P2P message Gavin Andresen <gavinandresen@gmail.com> Standards Track Final
62 Consensus (soft fork) Dealing with malleability Pieter Wuille <pieter.wuille@gmail.com> Standards Track Withdrawn
64 Peer Services getutxo message Mike Hearn <hearn@vinumeris.com> Standards Track Obsolete
65 Consensus (soft fork) OP_CHECKLOCKTIMEVERIFY Peter Todd <pete@petertodd.org> Standards Track Final
66 Consensus (soft fork) Strict DER signatures Pieter Wuille <pieter.wuille@gmail.com> Standards Track Final
67 Applications Deterministic Pay-to-script-hash multi-signature addresses through public key sorting Thomas Kerin <me@thomaskerin.io>, Jean-Pierre Rupp <root@haskoin.com>, Ruben de Vries <ruben@rubensayshi.com> Standards Track Proposed
68 Consensus (soft fork) Relative lock-time using consensus-enforced sequence numbers Mark Friedenbach <mark@friedenbach.org>, BtcDrak <btcdrak@gmail.com>, Nicolas Dorier <nicolas.dorier@gmail.com>, kinoshitajona <kinoshitajona@gmail.com> Standards Track Final
69 Applications Lexicographical Indexing of Transaction Inputs and Outputs Kristov Atlas <kristov@openbitcoinprivacyproject.org> Informational Proposed
70 Applications Payment Protocol Gavin Andresen <gavinandresen@gmail.com>, Mike Hearn <mhearn@bitcoinfoundation.org> Standards Track Final
71 Applications Payment Protocol MIME types Gavin Andresen <gavinandresen@gmail.com> Standards Track Final
72 Applications bitcoin Gavin Andresen <gavinandresen@gmail.com> Standards Track Final
73 Applications Use "Accept" header for response type negotiation with Payment Request URLs Stephen Pair <stephen@bitpay.com> Standards Track Final
74 Applications Allow zero value OP_RETURN in Payment Protocol Toby Padilla <tobypadilla@gmail.com> Standards Track Rejected
75 Applications Out of Band Address Exchange using Payment Protocol Encryption Justin Newton <justin@netki.com>, Matt David <mgd@mgddev.com>, Aaron Voisine <voisine@gmail.com>, James MacWhyte <macwhyte@gmail.com> Standards Track Final
78 Applications A Simple Payjoin Proposal Nicolas Dorier <nicolas.dorier@gmail.com> Standards Track Draft
79 Applications Bustapay : Ryan Havar <rhavar@protonmail.com> Informational Replaced
80 Hierarchy for Non-Colored Voting Pool Deterministic Multisig Wallets Justus Ranvier <justus@opentransactions.org>, Jimmy Song <jimmy@monetas.net> Informational Deferred
81 Hierarchy for Colored Voting Pool Deterministic Multisig Wallets Justus Ranvier <justus@opentransactions.org>, Jimmy Song <jimmy@monetas.net> Informational Deferred
83 Applications Dynamic Hierarchical Deterministic Key Trees Eric Lombrozo <eric@ciphrex.com> Standards Track Rejected
84 Applications Derivation scheme for P2WPKH based accounts Pavol Rusnak <stick@satoshilabs.com> Informational Draft
85 Applications Deterministic Entropy From BIP32 Keychains Ethan Kosakovsky <ethankosakovsky@protonmail.com> Informational Draft
86 Applications Key Derivation for Single Key P2TR Outputs Andrew Chow <andrew@achow101.com> Standards Track Draft
87 Applications Hierarchy for Deterministic Multisig Wallets Robert Spigler <RobertSpigler@ProtonMail.ch> Standards Track Proposed
88 Applications Hierarchical Deterministic Path Templates Dmitry Petukhov <dp@simplexum.com> Informational Proposed
90 Buried Deployments Suhas Daftuar <sdaftuar@chaincode.com> Informational Final
91 Consensus (soft fork) Reduced threshold Segwit MASF James Hilliard <james.hilliard1@gmail.com> Standards Track Final
98 Consensus (soft fork) Fast Merkle Trees Mark Friedenbach <mark@friedenbach.org>, Kalle Alm <kalle.alm@gmail.com>, BtcDrak <btcdrak@gmail.com> Standards Track Draft
99 Motivation and deployment of consensus rule changes ([soft/hard]forks) Jorge Timón <jtimon@jtimon.cc> Informational Rejected
100 Consensus (hard fork) Dynamic maximum block size by miner vote Jeff Garzik <jgarzik@gmail.com>, Tom Harding <tomh@thinlink.com>, Dagur Valberg Johannsson <dagurval@pvv.ntnu.no> Standards Track Rejected
101 Consensus (hard fork) Increase maximum block size Gavin Andresen <gavinandresen@gmail.com> Standards Track Withdrawn
102 Consensus (hard fork) Block size increase to 2MB Jeff Garzik <jgarzik@gmail.com> Standards Track Rejected
103 Consensus (hard fork) Block size following technological growth Pieter Wuille <pieter.wuille@gmail.com> Standards Track Withdrawn
104 Consensus (hard fork) 'Block75' - Max block size like difficulty t.khan <teekhan42@gmail.com> Standards Track Rejected
105 Consensus (hard fork) Consensus based block size retargeting algorithm BtcDrak <btcdrak@gmail.com> Standards Track Rejected
106 Consensus (hard fork) Dynamically Controlled Bitcoin Block Size Max Cap Upal Chakraborty <bitcoin@upalc.com> Standards Track Rejected
107 Consensus (hard fork) Dynamic limit on the block size Washington Y. Sanchez <washington.sanchez@gmail.com> Standards Track Rejected
109 Consensus (hard fork) Two million byte size limit with sigop and sighash limits Gavin Andresen <gavinandresen@gmail.com> Standards Track Rejected
111 Peer Services NODE_BLOOM service bit Matt Corallo <bip111@bluematt.me>, Peter Todd <pete@petertodd.org> Standards Track Proposed
112 Consensus (soft fork) CHECKSEQUENCEVERIFY BtcDrak <btcdrak@gmail.com>, Mark Friedenbach <mark@friedenbach.org>, Eric Lombrozo <elombrozo@gmail.com> Standards Track Final
113 Consensus (soft fork) Median time-past as endpoint for lock-time calculations Thomas Kerin <me@thomaskerin.io>, Mark Friedenbach <mark@friedenbach.org> Standards Track Final
114 Consensus (soft fork) Merkelized Abstract Syntax Tree Johnson Lau <jl2012@xbt.hk> Standards Track Rejected
115 Consensus (soft fork) Generic anti-replay protection using Script Luke Dashjr <luke+bip@dashjr.org> Standards Track Rejected
116 Consensus (soft fork) MERKLEBRANCHVERIFY Mark Friedenbach <mark@friedenbach.org>, Kalle Alm <kalle.alm@gmail.com>, BtcDrak <btcdrak@gmail.com> Standards Track Draft
117 Consensus (soft fork) Tail Call Execution Semantics Mark Friedenbach <mark@friedenbach.org>, Kalle Alm <kalle.alm@gmail.com>, BtcDrak <btcdrak@gmail.com> Standards Track Draft
118 Consensus (soft fork) SIGHASH_ANYPREVOUT for Taproot Scripts Christian Decker <decker.christian@gmail.com>, Anthony Towns <aj@erisian.com.au> Standards Track Draft
119 Consensus (soft fork) CHECKTEMPLATEVERIFY Jeremy Rubin <j@rubin.io> Standards Track Draft
120 Applications Proof of Payment Kalle Rosenbaum <kalle@rosenbaum.se> Standards Track Withdrawn
121 Applications Proof of Payment URI scheme Kalle Rosenbaum <kalle@rosenbaum.se> Standards Track Withdrawn
122 Applications URI scheme for Blockchain references / exploration Marco Pontello <marcopon@gmail.com> Standards Track Draft
123 BIP Classification Eric Lombrozo <elombrozo@gmail.com> Process Active
124 Applications Hierarchical Deterministic Script Templates Eric Lombrozo <eric@ciphrex.com>, William Swanson <swansontec@gmail.com> Informational Rejected
125 Applications Opt-in Full Replace-by-Fee Signaling David A. Harding <dave@dtrt.org>, Peter Todd <pete@petertodd.org> Standards Track Proposed
126 Best Practices for Heterogeneous Input Script Transactions Kristov Atlas <kristov@openbitcoinprivacyproject.org> Informational Draft
127 Applications Simple Proof-of-Reserves Transactions Steven Roose <steven@stevenroose.org> Standards Track Draft
129 Applications Bitcoin Secure Multisig Setup (BSMS) Hugo Nguyen <hugo@nunchuk.io>, Peter Gray <peter@coinkite.com>, Marko Bencun <marko@shiftcrypto.ch>, Aaron Chen <aarondongchen@gmail.com>, Rodolfo Novak <rodolfo@coinkite.com> Standards Track Proposed
130 Peer Services sendheaders message Suhas Daftuar <sdaftuar@chaincode.com> Standards Track Proposed
131 Consensus (hard fork) "Coalescing Transaction" Specification (wildcard inputs) Chris Priest <cp368202@ohiou.edu> Standards Track Rejected
132 Committee-based BIP Acceptance Process Andy Chase <theandychase@gmail.com> Process Withdrawn
133 Peer Services feefilter message Alex Morcos <morcos@chaincode.com> Standards Track Draft
134 Consensus (hard fork) Flexible Transactions Tom Zander <tomz@freedommail.ch> Standards Track Rejected
135 Generalized version bits voting Sancho Panza <sanch0panza@protonmail.com> Informational Rejected
136 Applications Bech32 Encoded Tx Position References Велеслав <veleslav.bips@protonmail.com>, Jonas Schnelli <dev@jonasschnelli.ch>, Daniel Pape <dpape@dpape.com> Informational Draft
137 Applications Signatures of Messages using Private Keys Christopher Gilliard <christopher.gilliard@gmail.com> Standards Track Final
140 Consensus (soft fork) Normalized TXID Christian Decker <decker.christian@gmail.com> Standards Track Rejected
141 Consensus (soft fork) Segregated Witness (Consensus layer) Eric Lombrozo <elombrozo@gmail.com>, Johnson Lau <jl2012@xbt.hk>, Pieter Wuille <pieter.wuille@gmail.com> Standards Track Final
142 Applications Address Format for Segregated Witness Johnson Lau <jl2012@xbt.hk> Standards Track Withdrawn
143 Consensus (soft fork) Transaction Signature Verification for Version 0 Witness Program Johnson Lau <jl2012@xbt.hk>, Pieter Wuille <pieter.wuille@gmail.com> Standards Track Final
144 Peer Services Segregated Witness (Peer Services) Eric Lombrozo <elombrozo@gmail.com>, Pieter Wuille <pieter.wuille@gmail.com> Standards Track Final
145 API/RPC getblocktemplate Updates for Segregated Witness Luke Dashjr <luke+bip22@dashjr.org> Standards Track Final
146 Consensus (soft fork) Dealing with signature encoding malleability Johnson Lau <jl2012@xbt.hk>, Pieter Wuille <pieter.wuille@gmail.com> Standards Track Withdrawn
147 Consensus (soft fork) Dealing with dummy stack element malleability Johnson Lau <jl2012@xbt.hk> Standards Track Final
148 Consensus (soft fork) Mandatory activation of segwit deployment Shaolin Fry <shaolinfry@protonmail.ch> Standards Track Final
149 Consensus (soft fork) Segregated Witness (second deployment) Shaolin Fry <shaolinfry@protonmail.ch> Standards Track Withdrawn
150 Peer Services Peer Authentication Jonas Schnelli <dev@jonasschnelli.ch> Standards Track Draft
151 Peer Services Peer-to-Peer Communication Encryption Jonas Schnelli <dev@jonasschnelli.ch> Standards Track Withdrawn
152 Peer Services Compact Block Relay Matt Corallo <bip152@bluematt.me> Standards Track Final
154 Peer Services Rate Limiting via peer specified challenges Karl-Johan Alm <karljohan-alm@garage.co.jp> Standards Track Withdrawn
155 Peer Services addrv2 message Wladimir J. van der Laan <laanwj@gmail.com> Standards Track Draft
156 Peer Services Dandelion - Privacy Enhancing Routing Brad Denby <bdenby@cmu.edu>, Andrew Miller <soc1024@illinois.edu>, Giulia Fanti <gfanti@andrew.cmu.edu>, Surya Bakshi <sbakshi3@illinois.edu>, Shaileshh Bojja Venkatakrishnan <shaileshh.bv@gmail.com>, Pramod Viswanath <pramodv@illinois.edu> Standards Track Rejected
157 Peer Services Client Side Block Filtering Olaoluwa Osuntokun <laolu32@gmail.com>, Alex Akselrod <alex@akselrod.org>, Jim Posen <jimpo@coinbase.com> Standards Track Draft
158 Peer Services Compact Block Filters for Light Clients Olaoluwa Osuntokun <laolu32@gmail.com>, Alex Akselrod <alex@akselrod.org> Standards Track Draft
159 Peer Services NODE_NETWORK_LIMITED service bit Jonas Schnelli <dev@jonasschnelli.ch> Standards Track Draft
171 Applications Currency/exchange rate information API Luke Dashjr <luke+bip@dashjr.org> Standards Track Rejected
173 Applications Base32 address format for native v0-16 witness outputs Pieter Wuille <pieter.wuille@gmail.com>, Greg Maxwell <greg@xiph.org> Informational Final
174 Applications Partially Signed Bitcoin Transaction Format Andrew Chow <achow101@gmail.com> Standards Track Final
175 Applications Pay to Contract Protocol Omar Shibli <omar@commerceblock.com>, Nicholas Gregory <nicholas@commerceblock.com> Informational Rejected
176 Bits Denomination Jimmy Song <jaejoon@gmail.com> Informational Draft
178 Applications Version Extended WIF Karl-Johan Alm <karljohan-alm@garage.co.jp> Standards Track Draft
179 Name for payment recipient identifiers Emil Engler <me@emilengler.com>, MarcoFalke <falke.marco@gmail.com>, Luke Dashjr <luke+bip@dashjr.org> Informational Draft
180 Peer Services Block size/weight fraud proof Luke Dashjr <luke+bip@dashjr.org> Standards Track Rejected
197 Applications Hashed Time-Locked Collateral Contract Matthew Black <matthew@atomicloans.io>, Tony Cai <tony@atomicloans.io> Standards Track Draft
199 Applications Hashed Time-Locked Contract transactions Sean Bowe <sean@z.cash>, Daira Hopwood <daira@z.cash> Standards Track Draft
300 Consensus (soft fork) Hashrate Escrows (Consensus layer) Paul Sztorc <truthcoin@gmail.com>, CryptAxe <cryptaxe@gmail.com> Standards Track Draft
301 Consensus (soft fork) Blind Merged Mining (Consensus layer) Paul Sztorc <truthcoin@gmail.com>, CryptAxe <cryptaxe@gmail.com> Standards Track Draft
310 Applications Stratum protocol extensions Pavel Moravec <pavel.moravec@braiins.cz>, Jan Čapek <jan.capek@braiins.cz> Informational Draft
320 nVersion bits for general purpose use BtcDrak <btcdrak@gmail.com> Standards Track Draft
322 Applications Generic Signed Message Format Karl-Johan Alm <karljohan-alm@garage.co.jp> Standards Track Draft
325 Applications Signet Karl-Johan Alm <karljohan-alm@garage.co.jp>, Anthony Towns <aj@erisian.com.au> Standards Track Proposed
330 Peer Services Transaction announcements reconciliation Gleb Naumenko <naumenko.gs@gmail.com>, Pieter Wuille <pieter.wuille@gmail.com> Standards Track Draft
338 Peer Services Disable transaction relay message Suhas Daftuar <sdaftuar@chaincode.com> Standards Track Draft
339 Peer Services WTXID-based transaction relay Suhas Daftuar <sdaftuar@chaincode.com> Standards Track Draft
340 Schnorr Signatures for secp256k1 Pieter Wuille <pieter.wuille@gmail.com>, Jonas Nick <jonasd.nick@gmail.com>, Tim Ruffing <crypto@timruffing.de> Standards Track Draft
341 Consensus (soft fork) Taproot Pieter Wuille <pieter.wuille@gmail.com>, Jonas Nick <jonasd.nick@gmail.com>, Anthony Towns <aj@erisian.com.au> Standards Track Draft
342 Consensus (soft fork) Validation of Taproot Scripts Pieter Wuille <pieter.wuille@gmail.com>, Jonas Nick <jonasd.nick@gmail.com>, Anthony Towns <aj@erisian.com.au> Standards Track Draft
343 Consensus (soft fork) Mandatory activation of taproot deployment Shinobius <quantumedusa@gmail.com>, Michael Folkson <michaelfolkson@gmail.com> Standards Track Proposed
350 Applications Bech32m format for v1+ witness addresses Pieter Wuille <pieter@wuille.net> Standards Track Draft
370 Applications PSBT Version 2 Andrew Chow <achow101@gmail.com> Standards Track Draft
371 Applications Taproot Fields for PSBT Andrew Chow <andrew@achow101.com> Standards Track Draft
380 Applications Output Script Descriptors General Operation Pieter Wuille <pieter@wuille.net>, Andrew Chow <andrew@achow101.com> Informational Draft
381 Applications Non-Segwit Output Script Descriptors Pieter Wuille <pieter@wuille.net>, Andrew Chow <andrew@achow101.com> Informational Draft
382 Applications Segwit Output Script Descriptors Pieter Wuille <pieter@wuille.net>, Andrew Chow <andrew@achow101.com> Informational Draft
383 Applications Multisig Output Script Descriptors Pieter Wuille <pieter@wuille.net>, Andrew Chow <andrew@achow101.com> Informational Draft
384 Applications combo() Output Script Descriptors Pieter Wuille <pieter@wuille.net>, Andrew Chow <andrew@achow101.com> Informational Draft
385 Applications raw() and addr() Output Script Descriptors Pieter Wuille <pieter@wuille.net>, Andrew Chow <andrew@achow101.com> Informational Draft
386 Applications tr() Output Script Descriptors Pieter Wuille <pieter@wuille.net>, Andrew Chow <andrew@achow101.com> Informational Draft