bips.dev - Read BIPs like a pro.

What is a BIP? A Bitcoin Improvement Proposal (BIP) is a design document providing information to the Bitcoin community, or describing a new feature for Bitcoin or its processes or environment. See BIP 3 for more information.

1 BIP Purpose and Guidelines
2 BIP process, revised
3 Updated BIP Process
8 Version bits with lock-in by height
9 Version bits with timeout and delay
10 Multi-Sig Transaction Distribution
11 M-of-N Standard Transactions
12 OP_EVAL
13 Address Format for pay-to-script-hash
14 Protocol Version and User Agent
15 Aliases
16 Pay to Script Hash
17 OP_CHECKHASHVERIFY (CHV)
18 hashScriptCheck
19 M-of-N Standard Transactions (Low SigOp)
20 URI Scheme
21 URI Scheme
22 getblocktemplate - Fundamentals
23 getblocktemplate - Pooled Mining
30 Duplicate transactions
31 Pong message
32 Hierarchical Deterministic Wallets
33 Stratized Nodes
34 Block v2, Height in Coinbase
35 mempool message
36 Custom Services
37 Connection Bloom filtering
38 Passphrase-protected private key
39 Mnemonic code for generating deterministic keys
42 A finite monetary supply for Bitcoin
43 Purpose Field for Deterministic Wallets
44 Multi-Account Hierarchy for Deterministic Wallets
45 Structure for Deterministic P2SH Multisignature Wallets
46 Address Scheme for Timelocked Fidelity Bonds
47 Reusable Payment Codes for Hierarchical Deterministic Wallets
48 Multi-Script Hierarchy for Multi-Sig Wallets
49 Derivation scheme for P2WPKH-nested-in-P2SH based accounts
50 March 2013 Chain Fork Post-Mortem
52 Durable, Low Energy Bitcoin PoW
53 Disallow 64-byte transactions
54 Consensus Cleanup
60 Fixed Length "version" Message (Relay-Transactions Field)
61 Reject P2P message
62 Dealing with malleability
64 getutxo message
65 OP_CHECKLOCKTIMEVERIFY
66 Strict DER signatures
67 Deterministic Pay-to-script-hash multi-signature addresses through public key sorting
68 Relative lock-time using consensus-enforced sequence numbers
69 Lexicographical Indexing of Transaction Inputs and Outputs
70 Payment Protocol
71 Payment Protocol MIME types
72 bitcoin: uri extensions for Payment Protocol
73 Use "Accept" header for response type negotiation with Payment Request URLs
74 Allow zero value OP_RETURN in Payment Protocol
75 Out of Band Address Exchange using Payment Protocol Encryption
77 Async Payjoin
78 A Simple Payjoin Proposal
79 Bustapay :: a practical coinjoin protocol
80 Hierarchy for Non-Colored Voting Pool Deterministic Multisig Wallets
81 Hierarchy for Colored Voting Pool Deterministic Multisig Wallets
83 Dynamic Hierarchical Deterministic Key Trees
84 Derivation scheme for P2WPKH based accounts
85 Deterministic Entropy From BIP32 Keychains
86 Key Derivation for Single Key P2TR Outputs
87 Hierarchy for Deterministic Multisig Wallets
88 Hierarchical Deterministic Path Templates
89 Chain Code Delegation
90 Buried Deployments
91 Reduced threshold Segwit MASF
93 codex32: Checksummed SSSS-aware BIP32 seeds
94 Testnet 4
95 Testnet 5
98 Fast Merkle Trees
99 Motivation and deployment of consensus rule changes ([soft/hard]forks)
100 Dynamic maximum block size by miner vote
101 Increase maximum block size
102 Block size increase to 2MB
103 Block size following technological growth
104 'Block75' - Max block size like difficulty
105 Consensus based block size retargeting algorithm
106 Dynamically Controlled Bitcoin Block Size Max Cap
107 Dynamic limit on the block size
109 Two million byte size limit with sigop and sighash limits
110 Reduced Data Temporary Softfork
111 NODE_BLOOM service bit
112 CHECKSEQUENCEVERIFY
113 Median time-past as endpoint for lock-time calculations
114 Merkelized Abstract Syntax Tree
115 Generic anti-replay protection using Script
116 MERKLEBRANCHVERIFY
117 Tail Call Execution Semantics
118 SIGHASH_ANYPREVOUT for Taproot Scripts
119 CHECKTEMPLATEVERIFY
120 Proof of Payment
121 Proof of Payment URI scheme
122 URI scheme for Blockchain references / exploration
123 BIP Classification
124 Hierarchical Deterministic Script Templates
125 Opt-in Full Replace-by-Fee Signaling
126 Best Practices for Heterogeneous Input Script Transactions
127 Simple Proof-of-Reserves Transactions
128 Timelock-Recovery Storage Format
129 Bitcoin Secure Multisig Setup (BSMS)
130 sendheaders message
131 "Coalescing Transaction" Specification (wildcard inputs)
132 Committee-based BIP Acceptance Process
133 feefilter message
134 Flexible Transactions
135 Generalized version bits voting
136 Bech32 Encoded Tx Position References
137 Signatures of Messages using Private Keys
140 Normalized TXID
141 Segregated Witness (Consensus layer)
142 Address Format for Segregated Witness
143 Transaction Signature Verification for Version 0 Witness Program
144 Segregated Witness (Peer Services)
145 getblocktemplate Updates for Segregated Witness
146 Dealing with signature encoding malleability
147 Dealing with dummy stack element malleability
148 Mandatory activation of segwit deployment
149 Segregated Witness (second deployment)
150 Peer Authentication
151 Peer-to-Peer Communication Encryption
152 Compact Block Relay
154 Rate Limiting via peer specified challenges
155 addrv2 message
156 Dandelion - Privacy Enhancing Routing
157 Client Side Block Filtering
158 Compact Block Filters for Light Clients
159 NODE_NETWORK_LIMITED service bit
171 Currency/exchange rate information API
172 Define Bitcoin Subunits as Satoshis
173 Base32 address format for native v0-16 witness outputs
174 Partially Signed Bitcoin Transaction Format
175 Pay to Contract Protocol
176 Bits Denomination
177 Redefine Bitcoin's Base Unit
178 Version Extended WIF
179 Name for payment recipient identifiers
180 Block size/weight fraud proof
197 Hashed Time-Locked Collateral Contract
199 Hashed Time-Locked Contract transactions
300 Hashrate Escrows (Consensus layer)
301 Blind Merged Mining (Consensus layer)
310 Stratum protocol extensions
320 nVersion bits for general purpose use
321 URI Scheme
322 Generic Signed Message Format
323 24 nVersion bits for general purpose use
324 Version 2 P2P Encrypted Transport Protocol
325 Signet
326 Anti-fee-sniping in taproot transactions
327 MuSig2 for BIP340-compatible Multi-Signatures
328 Derivation Scheme for MuSig2 Aggregate Keys
329 Wallet Labels Export Format
330 Transaction announcements reconciliation
331 Ancestor Package Relay
337 Compressed Transactions
338 Disable transaction relay message
339 WTXID-based transaction relay
340 Schnorr Signatures for secp256k1
341 Taproot: SegWit version 1 spending rules
342 Validation of Taproot Scripts
343 Mandatory activation of taproot deployment
345 OP_VAULT
346 OP_TXHASH
347 OP_CAT in Tapscript
348 CHECKSIGFROMSTACK
349 OP_INTERNALKEY
350 Bech32m format for v1+ witness addresses
351 Private Payments
352 Silent Payments
353 DNS Payment Instructions
360 Pay-to-Merkle-Root (P2MR)
361 Post Quantum Migration and Legacy Signature Sunset
370 PSBT Version 2
371 Taproot Fields for PSBT
372 Pay-to-contract tweak fields for PSBT
373 MuSig2 PSBT Fields
374 Discrete Log Equality Proofs
375 Sending Silent Payments with PSBTs
376 Spending Silent Payment outputs with PSBTs
379 Miniscript
380 Output Script Descriptors General Operation
381 Non-Segwit Output Script Descriptors
382 Segwit Output Script Descriptors
383 Multisig Output Script Descriptors
384 combo() Output Script Descriptors
385 raw() and addr() Output Script Descriptors
386 tr() Output Script Descriptors
387 Tapscript Multisig Output Script Descriptors
388 Wallet Policies for Descriptor Wallets
389 Multipath Descriptor Key Expressions
390 musig() Descriptor Key Expression
391 Binary Output Descriptors
392 Silent Payment Output Script Descriptors
393 Output Script Descriptor Annotations
431 Topology Restrictions for Pinning
433 Pay to Anchor (P2A)
434 Peer Feature Negotiation
440 Varops Budget For Script Runtime Constraint
441 Restoration of disabled script (Tapleaf 0xC2)
442 OP_PAIRCOMMIT
443 OP_CHECKCONTRACTVERIFY
446 OP_TEMPLATEHASH
448 Taproot-native (Re)bindable Transactions
449 OP_TWEAKADD - x-only key tweak addition
450 Formosa—Seed encoding by themed mnemonic stories
451 Dust UTXO Disposal Protocol

Updated

2026-06-26

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