Bitcoin Improvement Proposals

People wishing to submit BIPs, first should propose their idea or document to the mailing list. After discussion they should email Luke Dashjr <[email protected]>. 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 Active. For a BIP to become Active requires the mutual consent of the community.

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

Number Title Owner Type Status
1 BIP Purpose and Guidelines Amir Taaki Process Active
2 BIP process, revised Luke Dashjr Process Draft
9 Version bits with timeout and delay Pieter Wuille, Peter Todd, Greg Maxwell, Rusty Russell Informational Final
10 Multi-Sig Transaction Distribution Alan Reiner Informational Withdrawn
11 M-of-N Standard Transactions Gavin Andresen Standard Final
12 OP_EVAL Gavin Andresen Standard Withdrawn
13 Address Format for pay-to-script-hash Gavin Andresen Standard Final
14 Protocol Version and User Agent Amir Taaki, Patrick Strateman Standard Final
15 Aliases Amir Taaki Standard Deferred
16 Pay to Script Hash Gavin Andresen Standard Final
17 OP_CHECKHASHVERIFY (CHV) Luke Dashjr Standard Withdrawn
18 hashScriptCheck Luke Dashjr Standard Accepted
19 M-of-N Standard Transactions (Low SigOp) Luke Dashjr Standard Draft
20 URI Scheme Luke Dashjr Standard Replaced
21 URI Scheme Nils Schneider, Matt Corallo Standard Final
22 getblocktemplate - Fundamentals Luke Dashjr Standard Final
23 getblocktemplate - Pooled Mining Luke Dashjr Standard Final
30 Duplicate transactions Pieter Wuille Standard Final
31 Pong message Mike Hearn Standard Final
32 Hierarchical Deterministic Wallets Pieter Wuille Informational Final
33 Stratized Nodes Amir Taaki Standard Draft
34 Block v2, Height in Coinbase Gavin Andresen Standard Final
35 mempool message Jeff Garzik Standard Final
36 Custom Services Stefan Thomas Standard Draft
37 Connection Bloom filtering Mike Hearn, Matt Corallo Standard Final
38 Passphrase-protected private key Mike Caldwell, Aaron Voisine Standard Draft
39 Mnemonic code for generating deterministic keys Marek Palatinus, Pavol Rusnak, Aaron Voisine, Sean Bowe Standard Accepted
40 Stratum wire protocol Marek Palatinus Standard BIP number allocated
41 Stratum mining protocol Marek Palatinus Standard BIP number allocated
42 A finite monetary supply for Bitcoin Pieter Wuille Standard Draft
43 Purpose Field for Deterministic Wallets Marek Palatinus, Pavol Rusnak Informational Draft
44 Multi-Account Hierarchy for Deterministic Wallets Marek Palatinus, Pavol Rusnak Standard Accepted
45 Structure for Deterministic P2SH Multisignature Wallets Manuel Araoz, Ryan X. Charles, Matias Alejo Garcia Standard Accepted
47 Reusable Payment Codes for Hierarchical Deterministic Wallets Justus Ranvier Informational Draft
49 Derivation scheme for P2WPKH-nested-in-P2SH based accounts Daniel Weigl Informational Draft
50 March 2013 Chain Fork Post-Mortem Gavin Andresen Informational Final
60 Fixed Length "version" Message (Relay-Transactions Field) Amir Taaki Standard Draft
61 Reject P2P message Gavin Andresen Standard Final
62 Dealing with malleability Pieter Wuille Standard Withdrawn
63 Stealth Addresses Peter Todd Standard BIP number allocated
64 getutxo message Mike Hearn Standard Draft
65 OP_CHECKLOCKTIMEVERIFY Peter Todd Standard Final
66 Strict DER signatures Pieter Wuille Standard Final
67 Deterministic Pay-to-script-hash multi-signature addresses through public key sorting Thomas Kerin, Jean-Pierre Rupp, Ruben de Vries Standard Accepted
68 Relative lock-time using consensus-enforced sequence numbers Mark Friedenbach, BtcDrak, Nicolas Dorier, kinoshitajona Standard Final
69 Lexicographical Indexing of Transaction Inputs and Outputs Kristov Atlas Informational Accepted
70 Payment Protocol Gavin Andresen, Mike Hearn Standard Final
71 Payment Protocol MIME types Gavin Andresen Standard Final
72 bitcoin: uri extensions for Payment Protocol Gavin Andresen Standard Final
73 Use "Accept" header for response type negotiation with Payment Request URLs Stephen Pair Standard Final
74 Allow zero value OP_RETURN in Payment Protocol Toby Padilla Standard Draft
75 Out of Band Address Exchange using Payment Protocol Encryption Justin Newton, Matt David, Aaron Voisine, James MacWhyte Standard Draft
80 Hierarchy for Non-Colored Voting Pool Deterministic Multisig Wallets Justus Ranvier, Jimmy Song Informational Deferred
81 Hierarchy for Colored Voting Pool Deterministic Multisig Wallets Justus Ranvier, Jimmy Song Informational Deferred
83 Dynamic Hierarchical Deterministic Key Trees Eric Lombrozo Standard Draft
99 Motivation and deployment of consensus rule changes ([soft/hard]forks) Jorge Timón Informational Draft
101 Increase maximum block size Gavin Andresen Standard Withdrawn
102 Block size increase to 2MB Jeff Garzik Standard Draft
103 Block size following technological growth Pieter Wuille Standard Draft
105 Consensus based block size retargeting algorithm BtcDrak Standard Draft
106 Dynamically Controlled Bitcoin Block Size Max Cap Upal Chakraborty Standard Draft
107 Dynamic limit on the block size Washington Y. Sanchez Standard Draft
109 Two million byte size limit with sigop and sighash limits Gavin Andresen Standard Draft
111 NODE_BLOOM service bit Matt Corallo, Peter Todd Standard Accepted
112 CHECKSEQUENCEVERIFY BtcDrak, Mark Friedenbach, Eric Lombrozo Standard Final
113 Median time-past as endpoint for lock-time calculations Thomas Kerin, Mark Friedenbach Standard Final
114 Merkelized Abstract Syntax Tree Johnson Lau Standard Draft
120 Proof of Payment Kalle Rosenbaum Standard Draft
121 Proof of Payment URI scheme Kalle Rosenbaum Standard Draft
122 URI scheme for Blockchain references / exploration Marco Pontello Standard Draft
123 BIP Classification Eric Lombrozo Process Draft
124 Hierarchical Deterministic Script Templates Eric Lombrozo, William Swanson Informational Draft
125 Opt-in Full Replace-by-Fee Signaling David A. Harding, Peter Todd Standard Accepted
126 Best Practices for Heterogeneous Input Script Transactions Kristov Atlas Informational Draft
130 sendheaders message Suhas Daftuar Standard Accepted
131 "Coalescing Transaction" Specification (wildcard inputs) Chris Priest Standard Draft
132 Committee-based BIP Acceptance Process Andy Chase Process Withdrawn
133 feefilter message Alex Morcos Standard Draft
134 Flexible Transactions Tom Zander Standard Draft
140 Normalized TXID Christian Decker Standard Draft
141 Segregated Witness (Consensus layer) Eric Lombrozo, Johnson Lau, Pieter Wuille Standard Draft
142 Address Format for Segregated Witness Johnson Lau Standard Deferred
143 Transaction Signature Verification for Version 0 Witness Program Johnson Lau, Pieter Wuille Standard Draft
144 Segregated Witness (Peer Services) Eric Lombrozo, Pieter Wuille Standard Draft
145 getblocktemplate Updates for Segregated Witness Luke Dashjr Standard Draft
146 Dealing with signature encoding malleability Johnson Lau, Pieter Wuille Standard Draft
147 Dealing with dummy stack element malleability Johnson Lau Standard Draft
150 Peer Authentication Jonas Schnelli Standard Draft
151 Peer-to-Peer Communication Encryption Jonas Schnelli Standard Draft
152 Compact Block Relay Matt Corallo Standard Draft