Mastering Bitcoin

Appendix B. Bitcoin Improvement Proposals

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

As per BIP0001 BIP Purpose and Guidelines, there are three kinds of BIP:

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.

Bitcoin improvement proposals are recorded in a versioned repository on GitHub. Table B-1 shows a snapshot of BIPs in the Fall of 2014. Consult the authoritative repository for up-to-date information on existing BIPs and their contents.

Table B-1. Snapshot of BIPs

BIP#	Link	Title	Owner	Type	Status
1	https://github.com/bitcoin/bips/blob/master/bip-0001.mediawiki	BIP Purpose and Guidelines	Amir Taaki	Standard	Active
10	https://github.com/bitcoin/bips/blob/master/bip-0010.mediawiki	Multi-Sig Transaction Distribution	Alan Reiner	Informational	Draft
11	https://github.com/bitcoin/bips/blob/master/bip-0011.mediawiki	M-of-N Standard Transactions	Gavin Andresen	Standard	Accepted
12	https://github.com/bitcoin/bips/blob/master/bip-0012.mediawiki	OP_EVAL	Gavin Andresen	Standard	Withdrawn
13	https://github.com/bitcoin/bips/blob/master/bip-0013.mediawiki	Address Format for pay-to-script-hash	Gavin Andresen	Standard	Final
14	https://github.com/bitcoin/bips/blob/master/bip-0014.mediawiki	Protocol Version and User Agent	Amir Taaki, Patrick Strateman	Standard	Accepted
15	https://github.com/bitcoin/bips/blob/master/bip-0015.mediawiki	Aliases	Amir Taaki	Standard	Withdrawn
16	https://github.com/bitcoin/bips/blob/master/bip-0016.mediawiki	Pay To Script Hash	Gavin Andresen	Standard	Accepted
17	https://github.com/bitcoin/bips/blob/master/bip-0017.mediawiki	OP_CHECKHASHVERIFY (CHV)	Luke Dashjr	Withdrawn	Draft
18	https://github.com/bitcoin/bips/blob/master/bip-0018.mediawikilink:	hashScriptCheck	Luke Dashjr	Standard	Draft
19	https://github.com/bitcoin/bips/blob/master/bip-0019.mediawiki	M-of-N Standard Transactions (Low SigOp)	Luke Dashjr	Standard	Draft
20	https://github.com/bitcoin/bips/blob/master/bip-0020.mediawiki	URI Scheme	Luke Dashjr	Standard	Replaced
21	https://github.com/bitcoin/bips/blob/master/bip-0021.mediawiki	URI Scheme	Nils Schneider, Matt Corallo	Standard	Accepted
22	https://github.com/bitcoin/bips/blob/master/bip-0022.mediawiki	getblocktemplate - Fundamentals	Luke Dashjr	Standard	Accepted
23	https://github.com/bitcoin/bips/blob/master/bip-0023.mediawiki	getblocktemplate - Pooled Mining	Luke Dashjr	Standard	Accepted
30	https://github.com/bitcoin/bips/blob/master/bip-0030.mediawiki	Duplicate transactions	Pieter Wuille	Standard	Accepted
31	https://github.com/bitcoin/bips/blob/master/bip-0031.mediawiki	Pong message	Mike Hearn	Standard	Accepted
32	https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki	Hierarchical Deterministic Wallets	Pieter Wuille	Informational	Accepted
33	https://github.com/bitcoin/bips/blob/master/bip-0033.mediawiki	Stratized Nodes	Amir Taaki	Standard	Draft
34	https://github.com/bitcoin/bips/blob/master/bip-0034.mediawiki	Block v2, Height in coinbase	Gavin Andresen	Standard	Accepted
35	https://github.com/bitcoin/bips/blob/master/bip-0035.mediawiki	mempool message	Jeff Garzik	Standard	Accepted
36	https://github.com/bitcoin/bips/blob/master/bip-0036.mediawiki	Custom Services	Stefan Thomas	Standard	Draft
37	https://github.com/bitcoin/bips/blob/master/bip-0037.mediawiki	Bloom filtering	Mike Hearn and Matt Corallo	Standard	Accepted
38	https://github.com/bitcoin/bips/blob/master/bip-0038.mediawiki	Passphrase-protected private key	Mike Caldwell	Standard	Draft
39	https://github.com/bitcoin/bips/blob/master/bip-0039.mediawiki	Mnemonic code for generating deterministic keys	Slush	Standard	Draft
40		Stratum wire protocol	Slush	Standard	BIP number allocated
41		Stratum mining protocol	Slush	Standard	BIP number allocated
42	https://github.com/bitcoin/bips/blob/master/bip-0042.mediawiki	A finite monetary supply for bitcoin	Pieter Wuille	Standard	Draft
43	https://github.com/bitcoin/bips/blob/master/bip-0043.mediawiki	Purpose Field for Deterministic Wallets	Slush	Standard	Draft
44	https://github.com/bitcoin/bips/blob/master/bip-0044.mediawiki	Multi-Account Hierarchy for Deterministic Wallets	Slush	Standard	Draft
50	https://github.com/bitcoin/bips/blob/master/bip-0050.mediawiki	March 2013 Chain Fork Post-Mortem	Gavin Andresen	Informational	Draft
60	https://github.com/bitcoin/bips/blob/master/bip-0060.mediawiki	Fixed Length “version” Message (Relay-Transactions Field)	Amir Taaki	Standard	Draft
61	https://github.com/bitcoin/bips/blob/master/bip-0061.mediawiki	“reject” P2P message	Gavin Andresen	Standard	Draft
62	https://github.com/bitcoin/bips/blob/master/bip-0062.mediawiki	Dealing with malleability	Pieter Wuille	Standard	Draft
63		Stealth Addresses	Peter Todd	Standard	BIP number allocated
64	https://github.com/bitcoin/bips/blob/master/bip-0064.mediawiki	getutxos message	Mike Hearn	Standard	Draft
70	https://github.com/bitcoin/bips/blob/master/bip-0070.mediawiki	Payment protocol	Gavin Andresen	Standard	Draft
71	https://github.com/bitcoin/bips/blob/master/bip-0071.mediawiki	Payment protocol MIME types	Gavin Andresen	Standard	Draft
72	https://github.com/bitcoin/bips/blob/master/bip-0072.mediawiki	Payment protocol URIs	Gavin Andresen	Standard	Draft
73	https://github.com/bitcoin/bips/blob/master/bip-0073.mediawiki	Use “Accept” header with Payment Request URLs	Stephen Pair	Standard	Draft