appdx-bips.asciidoc

Appendix A: Bitcoin Improvement Proposals

Bitcoin Improvement Proposals are design documents providing information to the bitcoin community, or for describing a new feature for bitcoin or its processes or environment.

As per BIP-01 BIP Purpose and Guidelines, there are three kinds of BIPs:

Standard BIP

Describes any change that affects most or all bitcoin implementations, such as a change to the network protocol, a change in block or transaction validity rules, or any change or addition that affects the interoperability of applications using bitcoin.

Informational BIP

Describes a bitcoin design issue, or provides general guidelines or information to the bitcoin community, but does not propose a new feature. Informational BIPs do not necessarily represent a bitcoin community consensus or recommendation, so users and implementors may ignore informational BIPs or follow their advice.

Process BIP

Describes a bitcoin process, or proposes a change to (or an event in) a process. Process BIPs are like standard BIPs but apply to areas other than the bitcoin protocol itself. They might propose an implementation, but not to bitcoin’s codebase; they often require community consensus; and unlike informational BIPs, they are more than recommendations, and users are typically not free to ignore them. Examples include procedures, guidelines, changes to the decision-making process, and changes to the tools or environment used in bitcoin development. Any meta-BIP is also considered a process BIP.

BIPs are recorded in a versioned repository on GitHub: https://github.com/bitcoin/bips. Snapshot of BIPs shows a snapshot of the BIPs in April 2017. Consult the authoritative repository for up-to-date information on existing BIPs and their contents.

Table 1. Snapshot of BIPs

BIP#	Title	Owner	Type	Status
BIP-1	BIP Purpose and Guidelines	Amir Taaki	Process	Replaced
BIP-2	BIP process, revised	Luke Dashjr	Process	Active
BIP-8	Version bits with guaranteed lock-in	Shaolin Fry	Informational	Draft
BIP-9	Version bits with timeout and delay	Pieter Wuille, Peter Todd, Greg Maxwell, Rusty Russell	Informational	Final
BIP-10	Multi-Sig Transaction Distribution	Alan Reiner	Informational	Withdrawn
BIP-11	M-of-N Standard Transactions	Gavin Andresen	Standard	Final
BIP-12	OP_EVAL	Gavin Andresen	Standard	Withdrawn
BIP-13	Address Format for pay-to-script-hash	Gavin Andresen	Standard	Final
BIP-14	Protocol Version and User Agent	Amir Taaki, Patrick Strateman	Standard	Final
BIP-15	Aliases	Amir Taaki	Standard	Deferred
BIP-16	Pay to Script Hash	Gavin Andresen	Standard	Final
BIP-17	OP_CHECKHASHVERIFY (CHV)	Luke Dashjr	Standard	Withdrawn
BIP-18	hashScriptCheck	Luke Dashjr	Standard	Proposed
BIP-19	M-of-N Standard Transactions (Low SigOp)	Luke Dashjr	Standard	Draft
BIP-20	URI Scheme	Luke Dashjr	Standard	Replaced
BIP-21	URI Scheme	Nils Schneider, Matt Corallo	Standard	Final
BIP-22	getblocktemplate - Fundamentals	Luke Dashjr	Standard	Final
BIP-23	getblocktemplate - Pooled Mining	Luke Dashjr	Standard	Final
BIP-30	Duplicate transactions	Pieter Wuille	Standard	Final
BIP-31	Pong message	Mike Hearn	Standard	Final
BIP-32	Hierarchical Deterministic Wallets	Pieter Wuille	Informational	Final
BIP-33	Stratized Nodes	Amir Taaki	Standard	Draft
BIP-34	Block v2, Height in Coinbase	Gavin Andresen	Standard	Final
BIP-35	mempool message	Jeff Garzik	Standard	Final
BIP-36	Custom Services	Stefan Thomas	Standard	Draft
BIP-37	Connection Bloom filtering	Mike Hearn, Matt Corallo	Standard	Final
BIP-38	Passphrase-protected private key	Mike Caldwell, Aaron Voisine	Standard	Draft
BIP-39	Mnemonic code for generating deterministic keys	Marek Palatinus, Pavol Rusnak, Aaron Voisine, Sean Bowe	Standard	Proposed
BIP-40	Stratum wire protocol	Marek Palatinus	Standard	BIP number allocated
BIP-41	Stratum mining protocol	Marek Palatinus	Standard	BIP number allocated
BIP-42	A finite monetary supply for Bitcoin	Pieter Wuille	Standard	Draft
BIP-43	Purpose Field for Deterministic Wallets	Marek Palatinus, Pavol Rusnak	Informational	Draft
BIP-44	Multi-Account Hierarchy for Deterministic Wallets	Marek Palatinus, Pavol Rusnak	Standard	Proposed
BIP-45	Structure for Deterministic P2SH Multisignature Wallets	Manuel Araoz, Ryan X. Charles, Matias Alejo Garcia	Standard	Proposed
BIP-47	Reusable Payment Codes for Hierarchical Deterministic Wallets	Justus Ranvier	Informational	Draft
BIP-49	Derivation scheme for P2WPKH-nested-in-P2SH based accounts	Daniel Weigl	Informational	Draft
BIP-50	March 2013 Chain Fork Post-Mortem	Gavin Andresen	Informational	Final
BIP-60	Fixed Length "version" Message (Relay-Transactions Field)	Amir Taaki	Standard	Draft
BIP-61	Reject P2P message	Gavin Andresen	Standard	Final
BIP-62	Dealing with malleability	Pieter Wuille	Standard	Withdrawn
BIP-63	Stealth Addresses	Peter Todd	Standard	BIP number allocated
BIP-64	getutxo message	Mike Hearn	Standard	Draft
BIP-65	OP_CHECKLOCKTIMEVERIFY	Peter Todd	Standard	Final
BIP-66	Strict DER signatures	Pieter Wuille	Standard	Final
BIP-67	Deterministic Pay-to-script-hash multi-signature addresses through public key sorting	Thomas Kerin, Jean-Pierre Rupp, Ruben de Vries	Standard	Proposed
BIP-68	Relative lock-time using consensus-enforced sequence numbers	Mark Friedenbach, BtcDrak, Nicolas Dorier, kinoshitajona	Standard	Final
BIP-69	Lexicographical Indexing of Transaction Inputs and Outputs	Kristov Atlas	Informational	Proposed
BIP-70	Payment Protocol	Gavin Andresen, Mike Hearn	Standard	Final
BIP-71	Payment Protocol MIME types	Gavin Andresen	Standard	Final
BIP-72	bitcoin: uri extensions for Payment Protocol	Gavin Andresen	Standard	Final
BIP-73	Use "Accept" header for response type negotiation with Payment Request URLs	Stephen Pair	Standard	Final
BIP-74	Allow zero value OP_RETURN in Payment Protocol	Toby Padilla	Standard	Draft
BIP-75	Out of Band Address Exchange using Payment Protocol Encryption	Justin Newton, Matt David, Aaron Voisine, James MacWhyte	Standard	Draft
BIP-80	Hierarchy for Non-Colored Voting Pool Deterministic Multisig Wallets	Justus Ranvier, Jimmy Song	Informational	Deferred
BIP-81	Hierarchy for Colored Voting Pool Deterministic Multisig Wallets	Justus Ranvier, Jimmy Song	Informational	Deferred
BIP-83	Dynamic Hierarchical Deterministic Key Trees	Eric Lombrozo	Standard	Draft
BIP-90	Buried Deployments	Suhas Daftuar	Informational	Draft
BIP-99	Motivation and deployment of consensus rule changes ([soft/hard]forks)	Jorge Timón	Informational	Draft
BIP-101	Increase maximum block size	Gavin Andresen	Standard	Withdrawn
BIP-102	Block size increase to 2MB	Jeff Garzik	Standard	Draft
BIP-103	Block size following technological growth	Pieter Wuille	Standard	Draft
BIP-104	'Block75' - Max block size like difficulty	t.khan	Standard	Draft
BIP-105	Consensus based block size retargeting algorithm	BtcDrak	Standard	Draft
BIP-106	Dynamically Controlled Bitcoin Block Size Max Cap	Upal Chakraborty	Standard	Draft
BIP-107	Dynamic limit on the block size	Washington Y. Sanchez	Standard	Draft
BIP-109	Two million byte size limit with sigop and sighash limits	Gavin Andresen	Standard	Rejected
BIP-111	NODE_BLOOM service bit	Matt Corallo, Peter Todd	Standard	Proposed
BIP-112	CHECKSEQUENCEVERIFY	BtcDrak, Mark Friedenbach, Eric Lombrozo	Standard	Final
BIP-113	Median time-past as endpoint for lock-time calculations	Thomas Kerin, Mark Friedenbach	Standard	Final
BIP-114	Merkelized Abstract Syntax Tree	Johnson Lau	Standard	Draft
BIP-120	Proof of Payment	Kalle Rosenbaum	Standard	Draft
BIP-121	Proof of Payment URI scheme	Kalle Rosenbaum	Standard	Draft
BIP-122	URI scheme for Blockchain references / exploration	Marco Pontello	Standard	Draft
BIP-123	BIP Classification	Eric Lombrozo	Process	Active
BIP-124	Hierarchical Deterministic Script Templates	Eric Lombrozo, William Swanson	Informational	Draft
BIP-125	Opt-in Full Replace-by-Fee Signaling	David A. Harding, Peter Todd	Standard	Proposed
BIP-126	Best Practices for Heterogeneous Input Script Transactions	Kristov Atlas	Informational	Draft
BIP-130	sendheaders message	Suhas Daftuar	Standard	Proposed
BIP-131	"Coalescing Transaction" Specification (wildcard inputs)	Chris Priest	Standard	Draft
BIP-132	Committee-based BIP Acceptance Process	Andy Chase	Process	Withdrawn
BIP-133	feefilter message	Alex Morcos	Standard	Draft
BIP-134	Flexible Transactions	Tom Zander	Standard	Draft
BIP-140	Normalized TXID	Christian Decker	Standard	Draft
BIP-141	Segregated Witness (Consensus layer)	Eric Lombrozo, Johnson Lau, Pieter Wuille	Standard	Draft
BIP-142	Address Format for Segregated Witness	Johnson Lau	Standard	Deferred
BIP-143	Transaction Signature Verification for Version 0 Witness Program	Johnson Lau, Pieter Wuille	Standard	Draft
BIP-144	Segregated Witness (Peer Services)	Eric Lombrozo, Pieter Wuille	Standard	Draft
BIP-145	getblocktemplate Updates for Segregated Witness	Luke Dashjr	Standard	Draft
BIP-146	Dealing with signature encoding malleability	Johnson Lau, Pieter Wuille	Standard	Draft
BIP-147	Dealing with dummy stack element malleability	Johnson Lau	Standard	Draft
BIP-148	Mandatory activation of segwit deployment	Shaolin Fry	Standard	Draft
BIP-150	Peer Authentication	Jonas Schnelli	Standard	Draft
BIP-151	Peer-to-Peer Communication Encryption	Jonas Schnelli	Standard	Draft
BIP-152	Compact Block Relay	Matt Corallo	Standard	Draft
BIP-171	Currency/exchange rate information API	Luke Dashjr	Standard	Draft
BIP-180	Block size/weight fraud proof	Luke Dashjr	Standard	Draft
BIP-199	Hashed Time-Locked Contract transactions	Sean Bowe, Daira Hopwood	Standard	Draft