People wishing to submit BIPs should first describe their idea to the https://groups.google.com/g/bitcoindev [email protected] mailing list to get feedback on viability and community interested before working on a formal description. Please open a pull request to this repository only when substantial progress on the draft has been made, preferably when the draft is nearing completion. Authors do not assign a number to their own proposal. After a proposal meets the editorial criteria, a BIP Editor will assign a number to it and publish the proposal by merging the pull request to the repository. Please see BIP 3: Updated BIP Process for the full process.

The BIPs repository serves as a publication medium and archive. Having a BIP published here indicates that the proposal is in scope and has met other formal criteria for this repository, but does not indicate that it is a good idea, has community consensus, or that it is about to be adopted. The BIP Editors are expected to be liberal with publishing BIPs and to try not to be too involved in decision-making on behalf of the community. Beyond the formal criteria, evaluation of the proposals is left to the audience of the repository. When a proposal is controversial and it cannot be agreed upon whether it should be published, the conservative option will always be preferred: the proposal will be closed.

Those proposing and opposing changes should consider that ultimately acceptance and adoption rests with the Bitcoin users (see also: economic majority).

Number	Layer	Title	Owner	Type	Status
1		BIP Purpose and Guidelines	Amir Taaki	Process	Closed
2		BIP process, revised	Luke Dashjr	Process	Closed
3		Updated BIP Process	Murch	Process	Deployed
8		Version bits with lock-in by height	Shaolin Fry, Luke Dashjr	Informational	Draft
9		Version bits with timeout and delay	Pieter Wuille, Peter Todd, Greg Maxwell, Rusty Russell	Informational	Deployed
10	Applications	Multi-Sig Transaction Distribution	Alan Reiner	Informational	Closed
11	Applications	M-of-N Standard Transactions	Gavin Andresen	Specification	Deployed
12	Consensus (soft fork)	OP_EVAL	Gavin Andresen	Specification	Closed
13	Applications	Address Format for pay-to-script-hash	Gavin Andresen	Specification	Deployed
14	Peer Services	Protocol Version and User Agent	Amir Taaki, Patrick Strateman	Specification	Deployed
15	Applications	Aliases	Amir Taaki	Specification	Closed
16	Consensus (soft fork)	Pay to Script Hash	Gavin Andresen	Specification	Deployed
17	Consensus (soft fork)	OP_CHECKHASHVERIFY (CHV)	Luke Dashjr	Specification	Closed
18	Consensus (soft fork)	hashScriptCheck	Luke Dashjr	Specification	Complete
19	Applications	M-of-N Standard Transactions (Low SigOp)	Luke Dashjr	Specification	Closed
20	Applications	URI Scheme	Luke Dashjr	Specification	Closed
21	Applications	URI Scheme	Nils Schneider, Matt Corallo	Specification	Closed
22	API/RPC	getblocktemplate - Fundamentals	Luke Dashjr	Specification	Deployed
23	API/RPC	getblocktemplate - Pooled Mining	Luke Dashjr	Specification	Deployed
30	Consensus (soft fork)	Duplicate transactions	Pieter Wuille	Specification	Deployed
31	Peer Services	Pong message	Mike Hearn	Specification	Deployed
32	Applications	Hierarchical Deterministic Wallets	Pieter Wuille	Informational	Deployed
33	Peer Services	Stratized Nodes	Amir Taaki	Specification	Closed
34	Consensus (soft fork)	Block v2, Height in Coinbase	Gavin Andresen	Specification	Deployed
35	Peer Services	mempool message	Jeff Garzik	Specification	Deployed
36	Peer Services	Custom Services	Stefan Thomas	Specification	Closed
37	Peer Services	Connection Bloom filtering	Mike Hearn, Matt Corallo	Specification	Deployed
38	Applications	Passphrase-protected private key	Mike Caldwell, Aaron Voisine	Specification	Draft
39	Applications	Mnemonic code for generating deterministic keys	Marek Palatinus, Pavol Rusnak, Aaron Voisine, Sean Bowe	Specification	Deployed
40	API/RPC	Stratum wire protocol	Marek Palatinus	Standard	BIP number allocated
41	API/RPC	Stratum mining protocol	Marek Palatinus	Standard	BIP number allocated
42	Consensus (soft fork)	A finite monetary supply for Bitcoin	Pieter Wuille	Specification	Deployed
43	Applications	Purpose Field for Deterministic Wallets	Marek Palatinus, Pavol Rusnak	Specification	Deployed
44	Applications	Multi-Account Hierarchy for Deterministic Wallets	Marek Palatinus, Pavol Rusnak	Specification	Deployed
45	Applications	Structure for Deterministic P2SH Multisignature Wallets	Manuel Araoz, Ryan X. Charles, Matias Alejo Garcia	Specification	Complete
46	Applications	Address Scheme for Timelocked Fidelity Bonds	Chris Belcher, Thebora Kompanioni	Specification	Draft
47	Applications	Reusable Payment Codes for Hierarchical Deterministic Wallets	Justus Ranvier	Informational	Deployed
48	Applications	Multi-Script Hierarchy for Multi-Sig Wallets	Fontaine	Specification	Deployed
49	Applications	Derivation scheme for P2WPKH-nested-in-P2SH based accounts	Daniel Weigl	Specification	Deployed
50		March 2013 Chain Fork Post-Mortem	Gavin Andresen	Informational	Deployed
52	Consensus (hard fork)	Durable, Low Energy Bitcoin PoW	Michael Dubrovsky, Bogdan Penkovsky	Specification	Draft
53	Consensus (soft fork)	Disallow 64-byte transactions	Chris Stewart	Specification	Draft
54	Consensus (soft fork)	Consensus Cleanup	Antoine Poinsot, Matt Corallo	Specification	Draft
60	Peer Services	Fixed Length "version" Message (Relay-Transactions Field)	Amir Taaki	Specification	Closed
61	Peer Services	Reject P2P message	Gavin Andresen	Specification	Deployed
62	Consensus (soft fork)	Dealing with malleability	Pieter Wuille	Specification	Closed
63	Applications	Stealth Addresses	Peter Todd	Standard	BIP number allocated
64	Peer Services	getutxo message	Mike Hearn	Specification	Closed
65	Consensus (soft fork)	OP_CHECKLOCKTIMEVERIFY	Peter Todd	Specification	Deployed
66	Consensus (soft fork)	Strict DER signatures	Pieter Wuille	Specification	Deployed
67	Applications	Deterministic Pay-to-script-hash multi-signature addresses through public key sorting	Thomas Kerin, Jean-Pierre Rupp, Ruben de Vries	Specification	Complete
68	Consensus (soft fork)	Relative lock-time using consensus-enforced sequence numbers	Mark Friedenbach, BtcDrak, Nicolas Dorier, kinoshitajona	Specification	Deployed
69	Applications	Lexicographical Indexing of Transaction Inputs and Outputs	Kristov Atlas	Informational	Complete
70	Applications	Payment Protocol	Gavin Andresen, Mike Hearn	Specification	Deployed
71	Applications	Payment Protocol MIME types	Gavin Andresen	Specification	Deployed
72	Applications	bitcoin: uri extensions for Payment Protocol	Gavin Andresen	Specification	Deployed
73	Applications	Use "Accept" header for response type negotiation with Payment Request URLs	Stephen Pair	Specification	Deployed
74	Applications	Allow zero value OP_RETURN in Payment Protocol	Toby Padilla	Specification	Closed
75	Applications	Out of Band Address Exchange using Payment Protocol Encryption	Justin Newton, Matt David, Aaron Voisine, James MacWhyte	Specification	Deployed
77	Applications	Async Payjoin	Dan Gould, Yuval Kogman	Specification	Draft
78	Applications	A Simple Payjoin Proposal	Nicolas Dorier	Specification	Draft
79	Applications	Bustapay :: a practical coinjoin protocol	Ryan Havar	Informational	Closed
80		Hierarchy for Non-Colored Voting Pool Deterministic Multisig Wallets	Justus Ranvier, Jimmy Song	Informational	Closed
81		Hierarchy for Colored Voting Pool Deterministic Multisig Wallets	Justus Ranvier, Jimmy Song	Informational	Closed
83	Applications	Dynamic Hierarchical Deterministic Key Trees	Eric Lombrozo	Specification	Closed
84	Applications	Derivation scheme for P2WPKH based accounts	Pavol Rusnak	Specification	Deployed
85	Applications	Deterministic Entropy From BIP32 Keychains	Ethan Kosakovsky, Aneesh Karve	Informational	Deployed
86	Applications	Key Derivation for Single Key P2TR Outputs	Ava Chow	Specification	Deployed
87	Applications	Hierarchy for Deterministic Multisig Wallets	Robert Spigler	Specification	Complete
88	Applications	Hierarchical Deterministic Path Templates	Dmitry Petukhov	Informational	Complete
90		Buried Deployments	Suhas Daftuar	Informational	Deployed
91	Consensus (soft fork)	Reduced threshold Segwit MASF	James Hilliard	Specification	Deployed
93	Applications	codex32: Checksummed SSSS-aware BIP32 seeds	Leon Olsson Curr, Pearlwort Sneed, Andrew Poelstra	Informational	Draft
94	Applications	Testnet 4	Fabian Jahr	Specification	Deployed
98	Consensus (soft fork)	Fast Merkle Trees	Mark Friedenbach, Kalle Alm, BtcDrak	Specification	Draft
99		Motivation and deployment of consensus rule changes ([soft/hard]forks)	Jorge Timón	Informational	Closed
100	Consensus (hard fork)	Dynamic maximum block size by miner vote	Jeff Garzik, Tom Harding, Dagur Valberg Johannsson	Specification	Closed
101	Consensus (hard fork)	Increase maximum block size	Gavin Andresen	Specification	Closed
102	Consensus (hard fork)	Block size increase to 2MB	Jeff Garzik	Specification	Closed
103	Consensus (hard fork)	Block size following technological growth	Pieter Wuille	Specification	Closed
104	Consensus (hard fork)	'Block75' - Max block size like difficulty	t.khan	Specification	Closed
105	Consensus (hard fork)	Consensus based block size retargeting algorithm	BtcDrak	Specification	Closed
106	Consensus (hard fork)	Dynamically Controlled Bitcoin Block Size Max Cap	Upal Chakraborty	Specification	Closed
107	Consensus (hard fork)	Dynamic limit on the block size	Washington Y. Sanchez	Specification	Closed
109	Consensus (hard fork)	Two million byte size limit with sigop and sighash limits	Gavin Andresen	Specification	Closed
111	Peer Services	NODE_BLOOM service bit	Matt Corallo, Peter Todd	Specification	Deployed
112	Consensus (soft fork)	CHECKSEQUENCEVERIFY	BtcDrak, Mark Friedenbach, Eric Lombrozo	Specification	Deployed
113	Consensus (soft fork)	Median time-past as endpoint for lock-time calculations	Thomas Kerin, Mark Friedenbach	Specification	Deployed
114	Consensus (soft fork)	Merkelized Abstract Syntax Tree	Johnson Lau	Specification	Closed
115	Consensus (soft fork)	Generic anti-replay protection using Script	Luke Dashjr	Specification	Closed
116	Consensus (soft fork)	MERKLEBRANCHVERIFY	Mark Friedenbach, Kalle Alm, BtcDrak	Specification	Draft
117	Consensus (soft fork)	Tail Call Execution Semantics	Mark Friedenbach, Kalle Alm, BtcDrak	Specification	Draft
118	Consensus (soft fork)	SIGHASH_ANYPREVOUT for Taproot Scripts	Christian Decker, Anthony Towns	Specification	Draft
119	Consensus (soft fork)	CHECKTEMPLATEVERIFY	Jeremy Rubin	Specification	Draft
120	Applications	Proof of Payment	Kalle Rosenbaum	Specification	Closed
121	Applications	Proof of Payment URI scheme	Kalle Rosenbaum	Specification	Closed
122	Applications	URI scheme for Blockchain references / exploration	Marco Pontello	Specification	Draft
123		BIP Classification	Eric Lombrozo	Process	Deployed
124	Applications	Hierarchical Deterministic Script Templates	Eric Lombrozo, William Swanson	Informational	Closed
125	Applications	Opt-in Full Replace-by-Fee Signaling	David A. Harding, Peter Todd	Specification	Deployed
126		Best Practices for Heterogeneous Input Script Transactions	Kristov Atlas	Informational	Draft
127	Applications	Simple Proof-of-Reserves Transactions	Steven Roose	Specification	Draft
129	Applications	Bitcoin Secure Multisig Setup (BSMS)	Hugo Nguyen, Peter Gray, Marko Bencun, Aaron Chen, Rodolfo Novak	Specification	Complete
130	Peer Services	sendheaders message	Suhas Daftuar	Specification	Deployed
131	Consensus (hard fork)	"Coalescing Transaction" Specification (wildcard inputs)	Chris Priest	Specification	Closed
132		Committee-based BIP Acceptance Process	Andy Chase	Process	Closed
133	Peer Services	feefilter message	Alex Morcos	Specification	Deployed
134	Consensus (hard fork)	Flexible Transactions	Tom Zander	Specification	Closed
135		Generalized version bits voting	Sancho Panza	Informational	Closed
136	Applications	Bech32 Encoded Tx Position References	Велеслав, Jonas Schnelli, Daniel Pape	Informational	Draft
137	Applications	Signatures of Messages using Private Keys	Christopher Gilliard	Specification	Deployed
140	Consensus (soft fork)	Normalized TXID	Christian Decker	Specification	Closed
141	Consensus (soft fork)	Segregated Witness (Consensus layer)	Eric Lombrozo, Johnson Lau, Pieter Wuille	Specification	Deployed
142	Applications	Address Format for Segregated Witness	Johnson Lau	Specification	Closed
143	Consensus (soft fork)	Transaction Signature Verification for Version 0 Witness Program	Johnson Lau, Pieter Wuille	Specification	Deployed
144	Peer Services	Segregated Witness (Peer Services)	Eric Lombrozo, Pieter Wuille	Specification	Deployed
145	API/RPC	getblocktemplate Updates for Segregated Witness	Luke Dashjr	Specification	Deployed
146	Consensus (soft fork)	Dealing with signature encoding malleability	Johnson Lau, Pieter Wuille	Specification	Closed
147	Consensus (soft fork)	Dealing with dummy stack element malleability	Johnson Lau	Specification	Deployed
148	Consensus (soft fork)	Mandatory activation of segwit deployment	Shaolin Fry	Specification	Deployed
149	Consensus (soft fork)	Segregated Witness (second deployment)	Shaolin Fry	Specification	Closed
150	Peer Services	Peer Authentication	Jonas Schnelli	Specification	Closed
151	Peer Services	Peer-to-Peer Communication Encryption	Jonas Schnelli	Specification	Closed
152	Peer Services	Compact Block Relay	Matt Corallo	Specification	Deployed
154	Peer Services	Rate Limiting via peer specified challenges	Karl-Johan Alm	Specification	Closed
155	Peer Services	addrv2 message	Wladimir J. van der Laan	Specification	Deployed
156	Peer Services	Dandelion - Privacy Enhancing Routing	Brad Denby, Andrew Miller, Giulia Fanti, Surya Bakshi, Shaileshh Bojja Venkatakrishnan, Pramod Viswanath	Specification	Closed
157	Peer Services	Client Side Block Filtering	Olaoluwa Osuntokun, Alex Akselrod, Jim Posen	Specification	Deployed
158	Peer Services	Compact Block Filters for Light Clients	Olaoluwa Osuntokun, Alex Akselrod	Specification	Deployed
159	Peer Services	NODE_NETWORK_LIMITED service bit	Jonas Schnelli	Specification	Deployed
171	Applications	Currency/exchange rate information API	Luke Dashjr	Specification	Closed
172	Applications	Define Bitcoin Subunits as Satoshis	OceanSlim	Informational	Draft
173	Applications	Base32 address format for native v0-16 witness outputs	Pieter Wuille, Greg Maxwell	Informational	Deployed
174	Applications	Partially Signed Bitcoin Transaction Format	Ava Chow	Specification	Deployed
175	Applications	Pay to Contract Protocol	Omar Shibli, Nicholas Gregory	Informational	Closed
176		Bits Denomination	Jimmy Song	Informational	Draft
177		Redefine Bitcoin's Base Unit	John Carvalho	Informational	Draft
178	Applications	Version Extended WIF	Karl-Johan Alm	Specification	Draft
179		Name for payment recipient identifiers	Emil Engler, Luke Dashjr	Informational	Draft
180	Peer Services	Block size/weight fraud proof	Luke Dashjr	Specification	Closed
197	Applications	Hashed Time-Locked Collateral Contract	Matthew Black, Tony Cai	Specification	Draft
199	Applications	Hashed Time-Locked Contract transactions	Sean Bowe, Daira Hopwood	Specification	Closed
300	Consensus (soft fork)	Hashrate Escrows (Consensus layer)	Paul Sztorc, CryptAxe	Specification	Draft
301	Consensus (soft fork)	Blind Merged Mining (Consensus layer)	Paul Sztorc, CryptAxe	Specification	Draft
310	Applications	Stratum protocol extensions	Pavel Moravec, Jan Čapek	Informational	Draft
320		nVersion bits for general purpose use	BtcDrak	Specification	Draft
321	Applications	URI Scheme	Matt Corallo	Specification	Complete
322	Applications	Generic Signed Message Format	Karl-Johan Alm	Specification	Draft
324	Peer Services	Version 2 P2P Encrypted Transport Protocol	Dhruv Mehta, Tim Ruffing, Jonas Schnelli, Pieter Wuille	Specification	Deployed
325	Applications	Signet	Karl-Johan Alm, Anthony Towns	Specification	Complete
326	Applications	Anti-fee-sniping in taproot transactions	Chris Belcher	Informational	Draft
327		MuSig2 for BIP340-compatible Multi-Signatures	Jonas Nick, Tim Ruffing, Elliott Jin	Informational	Deployed
328	Applications	Derivation Scheme for MuSig2 Aggregate Keys	Ava Chow	Informational	Complete
329	Applications	Wallet Labels Export Format	Craig Raw	Informational	Draft
330	Peer Services	Transaction announcements reconciliation	Gleb Naumenko, Pieter Wuille	Specification	Draft
331	Peer Services	Ancestor Package Relay	Gloria Zhao	Specification	Draft
337	API/RPC	Compressed Transactions	Tom Briar	Specification	Draft
338	Peer Services	Disable transaction relay message	Suhas Daftuar	Specification	Closed
339	Peer Services	WTXID-based transaction relay	Suhas Daftuar	Specification	Deployed
340		Schnorr Signatures for secp256k1	Pieter Wuille, Jonas Nick, Tim Ruffing	Specification	Deployed
341	Consensus (soft fork)	Taproot: SegWit version 1 spending rules	Pieter Wuille, Jonas Nick, Anthony Towns	Specification	Deployed
342	Consensus (soft fork)	Validation of Taproot Scripts	Pieter Wuille, Jonas Nick, Anthony Towns	Specification	Deployed
343	Consensus (soft fork)	Mandatory activation of taproot deployment	Shinobius, Michael Folkson	Specification	Deployed
345	Consensus (soft fork)	OP_VAULT	James O'Beirne, Greg Sanders	Specification	Closed
347	Consensus (soft fork)	OP_CAT in Tapscript	Ethan Heilman, Armin Sabouri	Specification	Draft
348	Consensus (soft fork)	CHECKSIGFROMSTACK	Brandon Black, Jeremy Rubin	Specification	Draft
349	Consensus (soft fork)	OP_INTERNALKEY	Brandon Black, Jeremy Rubin	Specification	Draft
350	Applications	Bech32m format for v1+ witness addresses	Pieter Wuille	Specification	Deployed
351	Applications	Private Payments	Alfred Hodler, Clark Moody	Informational	Draft
352	Applications	Silent Payments	josibake, Ruben Somsen	Specification	Complete
353	Applications	DNS Payment Instructions	Matt Corallo, Bastien Teinturier	Specification	Complete
370	Applications	PSBT Version 2	Ava Chow	Specification	Deployed
371	Applications	Taproot Fields for PSBT	Ava Chow	Specification	Deployed
372	Applications	Pay-to-contract tweak fields for PSBT	Maxim Orlovsky	Specification	Draft
373	Applications	MuSig2 PSBT Fields	Ava Chow	Specification	Complete
374	Applications	Discrete Log Equality Proofs	Andrew Toth, Ruben Somsen, Sebastian Falbesoner	Specification	Draft
375	Applications	Sending Silent Payments with PSBTs	Andrew Toth, Ava Chow, josibake	Specification	Draft
379	Applications	Miniscript	Pieter Wuille, Andrew Poelstra, Sanket Kanjalkar, Antoine Poinsot, Ava Chow	Informational	Draft
380	Applications	Output Script Descriptors General Operation	Pieter Wuille, Ava Chow	Informational	Deployed
381	Applications	Non-Segwit Output Script Descriptors	Pieter Wuille, Ava Chow	Informational	Deployed
382	Applications	Segwit Output Script Descriptors	Pieter Wuille, Ava Chow	Informational	Deployed
383	Applications	Multisig Output Script Descriptors	Pieter Wuille, Ava Chow	Informational	Deployed
384	Applications	combo() Output Script Descriptors	Pieter Wuille, Ava Chow	Informational	Deployed
385	Applications	raw() and addr() Output Script Descriptors	Pieter Wuille, Ava Chow	Informational	Deployed
386	Applications	tr() Output Script Descriptors	Pieter Wuille, Ava Chow	Informational	Deployed
387	Applications	Tapscript Multisig Output Script Descriptors	Pieter Wuille, Ava Chow	Informational	Deployed
388	Applications	Wallet Policies for Descriptor Wallets	Salvatore Ingala	Specification	Complete
389	Applications	Multipath Descriptor Key Expressions	Ava Chow	Informational	Draft
390	Applications	musig() Descriptor Key Expression	Ava Chow	Informational	Draft
431	Applications	Topology Restrictions for Pinning	Gloria Zhao	Informational	Draft
433	Applications	Pay to Anchor (P2A)	Gregory Sanders	Informational	Draft
443	Consensus (soft fork)	OP_CHECKCONTRACTVERIFY	Salvatore Ingala	Specification	Draft