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).

# Title Layer Status Type Owner
1 BIP Purpose and Guidelines Replaced Process Amir Taaki
2 BIP process, revised Active Process Luke Dashjr
8 Version bits with lock-in by height Draft Informational Shaolin Fry, Luke Dashjr
9 Version bits with timeout and delay Final Informational Pieter Wuille, Peter Todd, Greg Maxwell, Rusty Russell
10 Multi-Sig Transaction Distribution Applications Withdrawn Informational Alan Reiner
11 M-of-N Standard Transactions Applications Final Standards Track Gavin Andresen
12 OP_EVAL Consensus (soft fork) Withdrawn Standards Track Gavin Andresen
13 Address Format for pay-to-script-hash Applications Final Standards Track Gavin Andresen
14 Protocol Version and User Agent Peer Services Final Standards Track Amir Taaki, Patrick Strateman
15 Aliases Applications Deferred Standards Track Amir Taaki
16 Pay to Script Hash Consensus (soft fork) Final Standards Track Gavin Andresen
17 OP_CHECKHASHVERIFY (CHV) Consensus (soft fork) Withdrawn Standards Track Luke Dashjr
18 hashScriptCheck Consensus (soft fork) Proposed Standards Track Luke Dashjr
19 M-of-N Standard Transactions (Low SigOp) Applications Rejected Standards Track Luke Dashjr
20 URI Scheme Applications Replaced Standards Track Luke Dashjr
21 URI Scheme Applications Final Standards Track Nils Schneider, Matt Corallo
22 getblocktemplate - Fundamentals API/RPC Final Standards Track Luke Dashjr
23 getblocktemplate - Pooled Mining API/RPC Final Standards Track Luke Dashjr
30 Duplicate transactions Consensus (soft fork) Final Standards Track Pieter Wuille
31 Pong message Peer Services Final Standards Track Mike Hearn
32 Hierarchical Deterministic Wallets Applications Final Informational Pieter Wuille
33 Stratized Nodes Peer Services Rejected Standards Track Amir Taaki
34 Block v2, Height in Coinbase Consensus (soft fork) Final Standards Track Gavin Andresen
35 mempool message Peer Services Final Standards Track Jeff Garzik
36 Custom Services Peer Services Rejected Standards Track Stefan Thomas
37 Connection Bloom filtering Peer Services Final Standards Track Mike Hearn, Matt Corallo
38 Passphrase-protected private key Applications Draft (Some confusion applies Standards Track Mike Caldwell, Aaron Voisine
39 Mnemonic code for generating deterministic keys Applications Proposed Standards Track Marek Palatinus, Pavol Rusnak, Aaron Voisine, Sean Bowe
42 A finite monetary supply for Bitcoin Consensus (soft fork) Final Standards Track Pieter Wuille
43 Purpose Field for Deterministic Wallets Applications Final Informational Marek Palatinus, Pavol Rusnak
44 Multi-Account Hierarchy for Deterministic Wallets Applications Proposed Standards Track Marek Palatinus, Pavol Rusnak
45 Structure for Deterministic P2SH Multisignature Wallets Applications Proposed Standards Track Manuel Araoz, Ryan X. Charles, Matias Alejo Garcia
47 Reusable Payment Codes for Hierarchical Deterministic Wallets Applications Draft Informational Justus Ranvier
48 Multi-Script Hierarchy for Multi-Sig Wallets Applications Proposed Standards Track Fontaine
49 Derivation scheme for P2WPKH-nested-in-P2SH based accounts Applications Final Informational Daniel Weigl
50 March 2013 Chain Fork Post-Mortem Final Informational Gavin Andresen
52 Durable, Low Energy Bitcoin PoW Consensus (hard fork) Draft Standards Track Michael Dubrovsky, Bogdan Penkovsky
60 Fixed Length "version" Message (Relay-Transactions Field) Peer Services Draft Standards Track Amir Taaki
61 Reject P2P message Peer Services Final Standards Track Gavin Andresen
62 Dealing with malleability Consensus (soft fork) Withdrawn Standards Track Pieter Wuille
64 getutxo message Peer Services Obsolete Standards Track Mike Hearn
65 OP_CHECKLOCKTIMEVERIFY Consensus (soft fork) Final Standards Track Peter Todd
66 Strict DER signatures Consensus (soft fork) Final Standards Track Pieter Wuille
67 Deterministic Pay-to-script-hash multi-signature addresses through public key sorting Applications Proposed Standards Track Thomas Kerin, Jean-Pierre Rupp, Ruben de Vries
68 Relative lock-time using consensus-enforced sequence numbers Consensus (soft fork) Final Standards Track Mark Friedenbach, BtcDrak, Nicolas Dorier, kinoshitajona
69 Lexicographical Indexing of Transaction Inputs and Outputs Applications Proposed Informational Kristov Atlas
70 Payment Protocol Applications Final Standards Track Gavin Andresen, Mike Hearn
71 Payment Protocol MIME types Applications Final Standards Track Gavin Andresen
72 bitcoin Applications Final Standards Track Gavin Andresen
73 Use "Accept" header for response type negotiation with Payment Request URLs Applications Final Standards Track Stephen Pair
74 Allow zero value OP_RETURN in Payment Protocol Applications Rejected Standards Track Toby Padilla
75 Out of Band Address Exchange using Payment Protocol Encryption Applications Final Standards Track Justin Newton, Matt David, Aaron Voisine, James MacWhyte
78 A Simple Payjoin Proposal Applications Draft Standards Track Nicolas Dorier
79 Bustapay : Applications Replaced Informational Ryan Havar
80 Hierarchy for Non-Colored Voting Pool Deterministic Multisig Wallets Deferred Informational Justus Ranvier, Jimmy Song
81 Hierarchy for Colored Voting Pool Deterministic Multisig Wallets Deferred Informational Justus Ranvier, Jimmy Song
83 Dynamic Hierarchical Deterministic Key Trees Applications Rejected Standards Track Eric Lombrozo
84 Derivation scheme for P2WPKH based accounts Applications Final Informational Pavol Rusnak
85 Deterministic Entropy From BIP32 Keychains Applications Draft Informational Ethan Kosakovsky
86 Key Derivation for Single Key P2TR Outputs Applications Draft Standards Track Andrew Chow
87 Hierarchy for Deterministic Multisig Wallets Applications Proposed Standards Track Robert Spigler
88 Hierarchical Deterministic Path Templates Applications Proposed Informational Dmitry Petukhov
90 Buried Deployments Final Informational Suhas Daftuar
91 Reduced threshold Segwit MASF Consensus (soft fork) Final Standards Track James Hilliard
93 codex32 Applications Draft Informational Leon Olsson Curr and Pearlwort Sneed, Andrew Poelstra
98 Fast Merkle Trees Consensus (soft fork) Draft Standards Track Mark Friedenbach, Kalle Alm, BtcDrak
99 Motivation and deployment of consensus rule changes ([soft/hard]forks) Rejected Informational Jorge Timón
100 Dynamic maximum block size by miner vote Consensus (hard fork) Rejected Standards Track Jeff Garzik, Tom Harding, Dagur Valberg Johannsson
101 Increase maximum block size Consensus (hard fork) Withdrawn Standards Track Gavin Andresen
102 Block size increase to 2MB Consensus (hard fork) Rejected Standards Track Jeff Garzik
103 Block size following technological growth Consensus (hard fork) Withdrawn Standards Track Pieter Wuille
104 'Block75' - Max block size like difficulty Consensus (hard fork) Rejected Standards Track t.khan
105 Consensus based block size retargeting algorithm Consensus (hard fork) Rejected Standards Track BtcDrak
106 Dynamically Controlled Bitcoin Block Size Max Cap Consensus (hard fork) Rejected Standards Track Upal Chakraborty
107 Dynamic limit on the block size Consensus (hard fork) Rejected Standards Track Washington Y. Sanchez
109 Two million byte size limit with sigop and sighash limits Consensus (hard fork) Rejected Standards Track Gavin Andresen
111 NODE_BLOOM service bit Peer Services Proposed Standards Track Matt Corallo, Peter Todd
112 CHECKSEQUENCEVERIFY Consensus (soft fork) Final Standards Track BtcDrak, Mark Friedenbach, Eric Lombrozo
113 Median time-past as endpoint for lock-time calculations Consensus (soft fork) Final Standards Track Thomas Kerin, Mark Friedenbach
114 Merkelized Abstract Syntax Tree Consensus (soft fork) Rejected Standards Track Johnson Lau
115 Generic anti-replay protection using Script Consensus (soft fork) Rejected Standards Track Luke Dashjr
116 MERKLEBRANCHVERIFY Consensus (soft fork) Draft Standards Track Mark Friedenbach, Kalle Alm, BtcDrak
117 Tail Call Execution Semantics Consensus (soft fork) Draft Standards Track Mark Friedenbach, Kalle Alm, BtcDrak
118 SIGHASH_ANYPREVOUT for Taproot Scripts Consensus (soft fork) Draft Standards Track Christian Decker, Anthony Towns
119 CHECKTEMPLATEVERIFY Consensus (soft fork) Draft Standards Track Jeremy Rubin, James O'Beirne
120 Proof of Payment Applications Withdrawn Standards Track Kalle Rosenbaum
121 Proof of Payment URI scheme Applications Withdrawn Standards Track Kalle Rosenbaum
122 URI scheme for Blockchain references / exploration Applications Draft Standards Track Marco Pontello
123 BIP Classification Active Process Eric Lombrozo
124 Hierarchical Deterministic Script Templates Applications Rejected Informational Eric Lombrozo, William Swanson
125 Opt-in Full Replace-by-Fee Signaling Applications Proposed Standards Track David A. Harding, Peter Todd
126 Best Practices for Heterogeneous Input Script Transactions Draft Informational Kristov Atlas
127 Simple Proof-of-Reserves Transactions Applications Draft Standards Track Steven Roose
129 Bitcoin Secure Multisig Setup (BSMS) Applications Proposed Standards Track Hugo Nguyen, Peter Gray, Marko Bencun, Aaron Chen, Rodolfo Novak
130 sendheaders message Peer Services Proposed Standards Track Suhas Daftuar
131 "Coalescing Transaction" Specification (wildcard inputs) Consensus (hard fork) Rejected Standards Track Chris Priest
132 Committee-based BIP Acceptance Process Withdrawn Process Andy Chase
133 feefilter message Peer Services Draft Standards Track Alex Morcos
134 Flexible Transactions Consensus (hard fork) Rejected Standards Track Tom Zander
135 Generalized version bits voting Rejected Informational Sancho Panza
136 Bech32 Encoded Tx Position References Applications Draft Informational Велеслав, Jonas Schnelli, Daniel Pape
137 Signatures of Messages using Private Keys Applications Final Standards Track Christopher Gilliard
140 Normalized TXID Consensus (soft fork) Rejected Standards Track Christian Decker
141 Segregated Witness (Consensus layer) Consensus (soft fork) Final Standards Track Eric Lombrozo, Johnson Lau, Pieter Wuille
142 Address Format for Segregated Witness Applications Withdrawn Standards Track Johnson Lau
143 Transaction Signature Verification for Version 0 Witness Program Consensus (soft fork) Final Standards Track Johnson Lau, Pieter Wuille
144 Segregated Witness (Peer Services) Peer Services Final Standards Track Eric Lombrozo, Pieter Wuille
145 getblocktemplate Updates for Segregated Witness API/RPC Final Standards Track Luke Dashjr
146 Dealing with signature encoding malleability Consensus (soft fork) Withdrawn Standards Track Johnson Lau, Pieter Wuille
147 Dealing with dummy stack element malleability Consensus (soft fork) Final Standards Track Johnson Lau
148 Mandatory activation of segwit deployment Consensus (soft fork) Final Standards Track Shaolin Fry
149 Segregated Witness (second deployment) Consensus (soft fork) Withdrawn Standards Track Shaolin Fry
150 Peer Authentication Peer Services Draft Standards Track Jonas Schnelli
151 Peer-to-Peer Communication Encryption Peer Services Replaced Standards Track Jonas Schnelli
152 Compact Block Relay Peer Services Final Standards Track Matt Corallo
154 Rate Limiting via peer specified challenges Peer Services Withdrawn Standards Track Karl-Johan Alm
155 addrv2 message Peer Services Draft Standards Track Wladimir J. van der Laan
156 Dandelion - Privacy Enhancing Routing Peer Services Rejected Standards Track Brad Denby, Andrew Miller, Giulia Fanti, Surya Bakshi, Shaileshh Bojja Venkatakrishnan, Pramod Viswanath
157 Client Side Block Filtering Peer Services Draft Standards Track Olaoluwa Osuntokun, Alex Akselrod, Jim Posen
158 Compact Block Filters for Light Clients Peer Services Draft Standards Track Olaoluwa Osuntokun, Alex Akselrod
159 NODE_NETWORK_LIMITED service bit Peer Services Draft Standards Track Jonas Schnelli
171 Currency/exchange rate information API Applications Rejected Standards Track Luke Dashjr
173 Base32 address format for native v0-16 witness outputs Applications Final Informational Pieter Wuille, Greg Maxwell
174 Partially Signed Bitcoin Transaction Format Applications Final Standards Track Andrew Chow
175 Pay to Contract Protocol Applications Rejected Informational Omar Shibli, Nicholas Gregory
176 Bits Denomination Draft Informational Jimmy Song
178 Version Extended WIF Applications Draft Standards Track Karl-Johan Alm
179 Name for payment recipient identifiers Draft Informational Emil Engler, Luke Dashjr
180 Block size/weight fraud proof Peer Services Rejected Standards Track Luke Dashjr
197 Hashed Time-Locked Collateral Contract Applications Draft Standards Track Matthew Black, Tony Cai
199 Hashed Time-Locked Contract transactions Applications Draft Standards Track Sean Bowe, Daira Hopwood
300 Hashrate Escrows (Consensus layer) Consensus (soft fork) Draft Standards Track Paul Sztorc, CryptAxe
301 Blind Merged Mining (Consensus layer) Consensus (soft fork) Draft Standards Track Paul Sztorc, CryptAxe
310 Stratum protocol extensions Applications Draft Informational Pavel Moravec, Jan Čapek
320 nVersion bits for general purpose use Draft Standards Track BtcDrak
322 Generic Signed Message Format Applications Draft Standards Track Karl-Johan Alm
324 Version 2 P2P Encrypted Transport Protocol Peer Services Draft Standards Track Dhruv Mehta, Tim Ruffing, Jonas Schnelli, Pieter Wuille
325 Signet Applications Proposed Standards Track Karl-Johan Alm, Anthony Towns
326 Anti-fee-sniping in taproot transactions Applications Draft Informational Chris Belcher
327 MuSig2 for BIP340-compatible Multi-Signatures Draft Informational Jonas Nick, Tim Ruffing, Elliott Jin
329 Wallet Labels Export Format Applications Draft Informational Craig Raw
330 Transaction announcements reconciliation Peer Services Draft Standards Track Gleb Naumenko, Pieter Wuille
338 Disable transaction relay message Peer Services Draft Standards Track Suhas Daftuar
339 WTXID-based transaction relay Peer Services Draft Standards Track Suhas Daftuar
340 Schnorr Signatures for secp256k1 Final Standards Track Pieter Wuille, Jonas Nick, Tim Ruffing
341 Taproot Consensus (soft fork) Final Standards Track Pieter Wuille, Jonas Nick, Anthony Towns
342 Validation of Taproot Scripts Consensus (soft fork) Final Standards Track Pieter Wuille, Jonas Nick, Anthony Towns
343 Mandatory activation of taproot deployment Consensus (soft fork) Final Standards Track Shinobius, Michael Folkson
350 Bech32m format for v1+ witness addresses Applications Final Standards Track Pieter Wuille
351 Private Payments Applications Draft Informational Alfred Hodler, Clark Moody
370 PSBT Version 2 Applications Draft Standards Track Andrew Chow
371 Taproot Fields for PSBT Applications Draft Standards Track Andrew Chow
372 Pay-to-contract tweak fields for PSBT Applications Draft Standards Track Maxim Orlovsky
380 Output Script Descriptors General Operation Applications Draft Informational Pieter Wuille, Andrew Chow
381 Non-Segwit Output Script Descriptors Applications Draft Informational Pieter Wuille, Andrew Chow
382 Segwit Output Script Descriptors Applications Draft Informational Pieter Wuille, Andrew Chow
383 Multisig Output Script Descriptors Applications Draft Informational Pieter Wuille, Andrew Chow
384 combo() Output Script Descriptors Applications Draft Informational Pieter Wuille, Andrew Chow
385 raw() and addr() Output Script Descriptors Applications Draft Informational Pieter Wuille, Andrew Chow
386 tr() Output Script Descriptors Applications Draft Informational Pieter Wuille, Andrew Chow
389 Multipath Descriptor Key Expressions Applications Draft Informational Andrew Chow