Cardano Improvement Proposals (CIPs)

A Cardano Improvement Proposal (CIP) is a formalised design document for the Cardano community and the name of the process by which such documents are produced and listed. A CIP provides information or describes a change to the Cardano ecosystem, processes, or environment concisely and in sufficient technical detail. In this CIP, we explain what a CIP is; how the CIP process functions; the role of the CIP Editors; and how users should go about proposing, discussing and structuring a CIP.

The Cardano Foundation intends CIPs to be the primary mechanisms for proposing new features, collecting community input on an issue, and documenting design decisions that have gone into Cardano. Plus, because CIPs are text files in a versioned repository, their revision history is the historical record of significant changes affecting Cardano.

Note For new CIP, a reference template is available in .github/CIP-TEMPLATE.md

Cardano Problem Statements (CPS)

A Cardano Problem Statement (CPS) is a formalised document for the Cardano ecosystem and the name of the process by which such documents are produced and listed. CPSs are meant to complement CIPs and live side-by-side in the CIP repository as first-class citizens.

Note For new CPS, a reference template is available in .github/CPS-TEMPLATE.md

Communication Channels

Extend or discuss ‘ideas’ in the Developer Forums, Cardano’s Official Developer Telegram Group or in #developers in Cardano Ambassadors Slack.

CIP editors will review discussions and progress in bi-weekly meetings held on Discord, then transcribe and summarise them in the BikweeklyMeetings folder.

CIP Editors meetings are public, recorded, and published on Youtube: do join and participate in discussions/PRs of significance to you.

Note To facilitate browsing and information sharing for non-Github users, an auto-generated site is also provided at cips.cardano.org.

Cardano Improvement Proposals (CIP)

#	Title	Status
0001	CIP process	Active
0002	Coin Selection Algorithms for Cardano	Active
0003	Wallet key generation	Active
0004	Wallet Checksums	Proposed
0005	Common Bech32 Prefixes	Active
0006	Stake Pool Extended Metadata	Draft
0007	Curve Pledge Benefit	Proposed
0008	Message Signing	Draft
0009	Protocol Parameters (Shelley Era)	Active
0010	Transaction Metadata Label Registry	Active
0011	Staking key chain for HD wallets	Active
0012	On-chain stake pool operator to delegates communication	Draft
0013	Cardano URI Scheme	Proposed
0014	User-Facing Asset Fingerprint	Active
0015	Catalyst Registration Transaction Metadata Format	Active
0016	Cryptographic Key Serialisation Formats	Active
0017	Cardano Delegation Portfolio	Active
0018	Multi-Stake-Keys Wallets	Draft
0019	Cardano Addresses	Active
0020	Transaction message/comment metadata	Active
0021	Transaction requirements for interoperability with hardware wallets	Draft
0022	Pool operator verification	Active
0023	Fair Min Fees	Proposed
0024	Non-Centralizing Rankings	Proposed
0025	Media Token Metadata Standard	Active
0026	Cardano Off-Chain Metadata	Draft
0027	CNFT Community Royalties Standard	Draft
0028	Protocol Parameters (Alonzo Era)	Active
0029	Phase-1 Monetary Scripts Serialization Formats	Active
0030	Cardano dApp-Wallet Web Bridge	Active
0031	Reference Inputs	Active
0032	Inline Datums	Active
0033	Reference Scripts	Active
0034	Chain ID Registry	Draft
0035	Plutus Core Evolution	Active
0036	Catalyst Registration Transaction Metadata Format	Proposed
0037	Dynamic Saturation Based on Pledge	Proposed
0040	Collateral Output	Active
0042	New Plutus Builtin: serialiseBuiltinData	Active
0045	Decentralized WebRTC dApp-Wallet Communication	Active
0049	ECDSA and Schnorr signatures in Plutus Core	Proposed
0050	Pledge Leverage-Based Staking Rewards	Proposed
0052	Cardano Audit Best Practice Guidelines	Proposed
0054	Cardano Smart NFTs	Draft
0055	Protocol Parameters (Babbage Era)	Active
0057	Plutus Smart-Contract Blueprint	Active
0058	Plutus Bitwise Primitives	Proposed
0059	Terminology Surrounding Core Features	Active
0060	Music Token Metadata	Active
0067	Asset Name Label Registry	Proposed
0068	Datum Metadata Standard	Proposed
0069	Plutus Script Type Uniformization	Proposed
0071	Non-Fungible Token (NFT) Proxy Voting Standard	Proposed
0072	DApp Registration	Proposed
0074	Set min-pool-cost to 0	Proposed
0075	Fair Stake Pool Rewards	Proposed
0080	Transaction Serialization Deprecation Cycle	Active
0082	Improved Rewards Scheme Parameters	Proposed
0083	Encrypted Transaction message/comment metadata (Addendum to CIP-0020)	Active
0084	Cardano Ledger Evolution	Active
0085	Sums-of-products in Plutus Core	Proposed
0086	NFT Metadata Update Oracles	Proposed
0088	Token Policy Registration	Proposed
0093	Authenticated Web3 HTTP requests	Proposed
0094	SPO On-chain Polls	Active
0095	Web-Wallet Bridge - Conway ledger era	Active
0099	Proof of Onboarding	Active
0100	Governance Metadata	Proposed
0101	Integration of keccak256 into Plutus	Proposed
0102	Royalty Datum Metadata	Proposed
0103	Web-Wallet Bridge - Bulk transaction signing	Active
0104	Web-Wallet Bridge - Account public key	Proposed
0105	Conway Era Key Chains for HD Wallets	Proposed
0106	Web-Wallet Bridge - Multisig wallets	Proposed
0108	Governance Metadata - Governance Actions	Proposed
0109	Modular Exponentiation Built-in for Plutus Core	Proposed
0110	Plutus v1 compatible script references	Proposed
0112	Observe script type	Proposed
0114	CBOR Tags Registry	Proposed
0115	CBOR tag definition - ED25519-BIP32 Keys	Proposed
0116	Universal JSON Encoding for Domain Types	Proposed
0117	Explicit script return values	Proposed
0119	Governance Metadata - DReps	Proposed
0121	Integer-ByteString conversions	Active
0122	Logical operations over BuiltinByteString	Proposed
0123	Bitwise operations over BuiltinByteString	Proposed
0381	Plutus Support for Pairings Over BLS12-381	Proposed
1694	A proposal for entering the Voltaire phase	Proposed
1852	HD (Hierarchy for Deterministic) Wallets for Cardano	Active
1853	HD (Hierarchy for Deterministic) Stake Pool Cold Keys for Cardano	Active
1854	Multi-signatures HD Wallets	Draft
1855	Forging policy keys for HD Wallets	Active
9999	Cardano Problem Statements	Active

Last updated on 2024-06-30

💡 For more details about CIP statuses, refer to CIP-0001.

Proposals Under Review (CIP)

Below are listed tentative CIPs still under discussion with the community. They are listed below for easing navigation and tentatively allocating numbers to avoid later clashes.

#	Title
0039?	Language Annotated Address
0056?	Treasury Donation
0073?	Oracle Datum Standard
0076?	Hash-Checked Data
0077?	Verified Stake Pool Identity
0079?	Implement Ouroboros Leios to increase Cardano throughput
0087?	Maybe Datum
0089?	Beacon Tokens & Distributed Dapps
0090?	Extendable dApp-Wallet Web Bridge
0091?	Don't force Built-In functions
0092?	First-class errors in Plutus
0096?	On-chain dApp Certification Metadata
0097?	Representing the Script Context as a SOP term
0107?	URI Scheme - Block and transaction objects
0111?	Web-Wallet Bridge - Wallet Transaction Caching
0113?	Programmable token-like assets
0118?	Validation zones
0120?	Constitution specification
0124?	Extend token metadata for translations
0125?	Arrestable native assets

Last updated on 2024-06-30

Cardano Problem Statements (CPS)

#	Title	Status
0005	Plutus Script Usability	Open
0007	Voltaire era Governance	Open
0009	Coin Selection Including Native Tokens	Open
0010	Wallet Connectors	Open
0011	Universal JSON Encoding for Domain Types	Open
0013	Better builtin data structures in Plutus	Open
0014	Register of CBOR Tags	Open

Last updated on 2024-05-19

💡 For more details about CPS statuses, refer to CIP-9999.

Proposals Under Review (CPS)

Below are listed tentative CPSs still under discussion with the community. They are listed below for easing navigation and also tentatively allocating numbers to avoid clashes later on.

#	Title
0001?	Metadata Discoverability and Trust
0004?	Spending Script Redundant Execution
0006?	Governance Security
0008?	Domain Name Resolution
0012?	Query Layer Standardization
0015?	Intents for Cardano
0016?	Cardano URIs

Last updated on 2024-06-30

Stalled / Waiting For Authors

The following list contains proposals that have been under review and for which actions are now awaiting updates from their original authors. Proposals stalled for several months without any updates from their authors and will eventually be closed. However, authors are invited to re-open pull requests or open new ones should they want to bring the discussion back to life.

• UPLC Serialization Optimizations
• Address Resolution Through DNS
• Transferring Stake Pool Ownership
• Extended Local Chain Sync Protocol
• Tiered Pricing Protocol
• Properly burning NFTs/tokens
• On-chain Transaction Chaining
• Merklised Plutus Scripts
• Rejected Ideas w.r.t Spending Policies
• Post Quantum signatures and native wallets

Last updated on 2023-06-30

Editors

Matthias Benkort @KtorZ	Sebastien Guillemot @SebastienGllmt	Robert Phair @rphair	Ryan Williams @Ryun1	Adam Dean @Crypto2099