#附录C、比特币改进提案（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（Standard）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（Informational）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（Process）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| BIP-10 | Multi-Sig Transaction Distribution | Alan Reiner | Informational | Withdrawn |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| BIP-12 | OP_EVAL | Gavin Andresen | Standard | Withdrawn |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| BIP-17 | OP_CHECKHASHVERIFY (CHV) | Luke Dashjr | Standard | Withdrawn |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-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 |