README

A repository for submitting, discussing, sharing, and indexing technical proposals for use across the Bitcoin ecosystem. Data models, user interfaces, script templates, encoding formats, communication protocols, and constructive critique of existing industry practice are all welcome. The goal is to provide a platform for sharing ideas without any bureaucratic overhead.

Contributing

Contributions from all builders are welcome and encouraged. To propose a new BRC, fork the repo and create a new markdown file using the ~EXAMPLE.md as the template. The common structure is outlined below, which is a guideline to aid you rather than a strict requirement. Once your proposal is ready to share, submit a pull request so that others can review and discuss it.

To participate in discussions about existing proposals, simply open an issue and link back to the BRC file in question.

Iterative improvement

We believe in encouraging discussion and iterative improvement of proposals, resulting in incremental improvement within the bounds of the Bitcoin protocol. We welcome suggestions for improvement and are committed to working with contributors to improve proposals and ensure that they align with our guidelines.

Note that substantial revisions to standards (beyond fixing typos, adding context or wording) should go into a new standard that extends or revises the old one, so as not to disrupt existing implementations.

We look forward to your contributions and helping to create a world where transactions are seamlessly formed, and applications interact with each other with ease.

Read more about areas of interest on OpenStandards.cash

Structure

The BRCs repository is organized into directories, each representing a different category of proposal. Categories may include, but are not limited to:

• Transaction Templates

• Bitcoin Script Templates

• Communication Protocols

Each proposal should be written as a markdown file and should loosely adhere to the following:

• Title: A descriptive title for the standard being defined.

• Author(s): Who wrote the standard and where did it come from? How can they be reached?

• Abstract: A brief description of the proposed standard or template.

• Motivation: The reasoning behind the proposal and why it is needed.

• Specification: A detailed technical specification of the proposal.

• Implementations: Information on how the proposal has been or can be implemented.

• References: Any relevant literature or external resources related to the proposal.

Note that additional relevant content, identifiers or other information may be added to the document. Documents that already existed before the repository may not follow these requirements.

Things that help depict and understand the document, such as media, may also be added in a media subdirectory where appropriate.

Refer to the Banana-Powered Bitcoin Wallet Control Protocol for a fun example template you can copy when proposing your own standards.

Standards

BRC	Standard
0	Banana-Powered Bitcoin Wallet Control Protocol
1	Transaction Creation
2	Data Encryption and Decryption
3	Digital Signature Creation and Verification
4	Input Redemption
5	HTTP Wallet Communications Substrate
6	XDM Wallet Communications Substrate
7	Window Wallet Communication Substrate
8	Everett-style Transaction Envelopes
9	Simplified Payment Verification
10	Merkle proof standardised format
11	TSC Proof Format with Heights
12	Raw Transaction Format
13	TXO Transaction Object Format
14	Bitcoin Script Binary, Hex and ASM Formats
15	Bitcoin Script Assembly Language
16	Pay to Public Key Hash
17	Pay to R Puzzle Hash
18	Pay to False Return
19	Pay to True Return
20	There is no BRC-20
21	Push TX
22	Overlay Network Data Synchronization
23	Confederacy Host Interconnect Protocol (CHIP)
24	Overlay Network Lookup Services
25	Confederacy Lookup Availability Protocol (CLAP)
26	Universal Hash Resolution Protocol
27	Direct Payment Protocol (DPP)
28	Paymail Payment Destinations
29	Simple Authenticated BSV P2PKH Payment Protocol
30	Transaction Extended Format (EF)
31	Authrite Mutual Authentication
32	BIP32 Key Derivation Scheme
33	PeerServ Message Relay Interface
34	PeerServ Host Interconnect Protocol
35	(unused, will assign next BRC to this number)
36	Format for Bitcoin Outpoints
37	Spending Instructions Extension for UTXO Storage Format
38	User Wallet Data Format
39	User Wallet Data Format Encryption Extension
40	User Wallet Data Synchronization
41	PacketPay HTTP Payment Mechanism
42	BSV Key Derivation Scheme (BKDS)
43	Security Levels, Protocol IDs, Key IDs and Counterparties
44	Admin-reserved and Prohibited Key Derivation Protocols
45	Definition of UTXOs as Bitcoin Tokens
46	Wallet Transaction Output Tracking (Output Baskets)
47	Bare Multi-Signature
48	Pay to Push Drop
49	Users should never see an address
50	Submitting Received Payments to a Wallet
51	List of user experiences
52	Identity Certificates
53	Certificate Creation and Revelation
54	Hybrid Payment Mode for DPP
55	HTTPS Transport Mechanism for DPP
56	Unified Abstract Wallet-to-Application Messaging Layer
57	Legitimate Uses for mAPI
58	Merkle Path JSON format
59	Security and Scalability Benefits of UTXO-based Overlay Networks
60	Simplifying State Machine Event Chains in Bitcoin
61	Compound Merkle Path Format
62	Background Evaluation Extended Format (BEEF) Transactions
63	Genealogical Identity Protocol
64	Overlay Network Transaction History Tracking
65	Transaction Labels and List Actions
66	Output Basket Removal and Certificate Deletion
67	Simplified Payment Verification
68	Publishing Trust Anchor Details at an Internet Domain
69	Revealing Key Linkages
70	Paymail BEEF Transaction
71	Merkle Path Binary Format
72	Protecting BRC-69 Key Linkage Information in Transit
73	Group Permissions for App Access
74	BSV Unified Merkle Path (BUMP) Format
75	Mnemonic For Master Private Key
76	Graph Aware Sync Protocol
77	Message Signature Creation and Verification
78	Serialization Format for Portable Encrypted Messages
79	Token Exchange Protocol for UTXO-based Overlay Networks
80	Improving on MLD for BSV Multicast Services
81	Private Overlays with P2PKH Transactions
82	Defining a Scalable IPv6 Multicast Protocol for Blockchain Transaction Broadcast and Update Delivery
83	Scalable Transaction Processing in the BSV Network
84	Linked Key Derivation Scheme
85	Proven Identity Key Exchange (PIKE)
86	Bidirectionally Authenticated Derivation of Privacy Restricted Type 42 Keys
87	Standardized Naming Conventions for BRC-22 Topic Managers and BRC-24 Lookup Services
88	Overlay Services Synchronization Architecture
89	Web 3.0 Standard (at a high level)
90	Thoughts on the Mandala Network
91	Outputs, Overlays, and Scripts in the Mandala Network
92	Mandala Token Protocol
93	Limitations of BRC-69 Key Linkage Revelation
94	Verifiable Revelation of Shared Secrets Using Schnorr Protocol
95	Atomic BEEF Transactions
96	BEEF V2 Txid Only Extension

License

Everything in this repository is subject to the Open BSV License.