附录3、比特币改进建议（BIPs）
比特币改进提案是向比特币社区提供信息的设计文档，或用于描述比特币的新功能，流程或环境。
根据BIP-01也就是BIP目的和指南（BIP Purpose and Guidelines）的规定，有三种BIP：
标准类BIP
描述影响大多数或所有比特币实现的任何更改，例如网络协议的更改，区块或交易有效性规则的更改，或影响使用比特币的应用程序的互操作性的任何更改或附加。
信息类BIP
描述比特币设计问题，或向比特币社区提供一般准则或信息，但不提出新功能。信息类BIP不一定代表比特币社区的共识或建议，因此用户和实施者可以忽略信息类BIP或遵循他们的建议。
过程类BIP
描述一个比特币过程，或者提出一个过程的更改（或一个事件）。过程类BIP类似于标准类BIP，但适用于比特币协议本身以外的其他领域。他们可能会提出一个实现，但不是比特币的代码库;他们经常需要社区的共识;与信息类BIP不同，它们不仅仅是建议，用户通常也不能随意忽略它们。例如包括程序，指南，决策过程的变化以及对比特币开发中使用的工具或环境的更改。任何元BIP也被视为一个过程BIP。
BIP记录在GitHub上的版本化存储库中：https://github.com/bitcoin/bips。 下表BIP的快照显示在2017年4月BIP的快照。了解有关现有BIP及其内容的最新信息请咨询权威机构。
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BIP-10 Multi-Sig Transaction Distribution Alan Reiner Informational Withdrawn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BIP-12 OP_EVAL Gavin Andresen Standard Withdrawn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BIP-17 OP_CHECKHASHVERIFY (CHV) Luke Dashjr Standard Withdrawn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