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Warning

The Tangle Improvement Proposal (TIP) repository and framework is deprecated. Please refer to the IOTA Improvement Proposals (IIP) for contributing to IOTA's technology. Since all TIPs refer to outdated protocol versions, they are all obsolete and no longer maintained.

Tangle Improvement Proposal (TIP) Repository

TIPs are improvement proposals for bettering the IOTA technology stack.

Building the IOTA ecosystem is a community effort, therefore we welcome anyone to propose, discuss and debate ideas that will later become formalized TIPs.

Propose new ideas

Do you have an idea how to improve the IOTA technology stack?

Head over to the discussions page to browse already submitted ideas or share yours!
Once your idea is discussed, you can submit a draft TIP (template here as a PR to the repository.
You will receive feedback from the TIP Editors and review from core devs.
Once accepted, your TIP is merged as Draft.
It is your responsibility to drive its implementation and to present a clear plan on how the new feature will be adopted by the network.
Once implementation is ready and testing yields satisfactory result, the TIP becomes Proposed.
Proposed TIPs that are supported by majority of the network become Active.

You may find more information about the TIP Process in TIP-1.

Stardust TIPs

Stardust is the next upgrade of the IOTA protocol that adds tokenization and smart contract chain support besides many more improvements. Browse the list of TIPs below with the Stardust tag to learn more about what changes.

List of TIPs

Last updated: 2023-10-19
The Status of a TIP reflects its current state with respect to its progression to being supported on the IOTA mainnet.
- Draft TIPs are work in progress. They may or may not have a working implementation on a testnet.
- Proposed TIPs are demonstrated to have a working implementation. These TIPs are supported on Shimmer, the staging network of IOTA.
- Active TIPs are supported on the IOTA mainnet.
- Replaced TIPs have been replaced by a newer TIP.
- Obsolete TIPs are no longer in use.

#	Title	Description	Type	Layer	Status	Initial Target
1	TIP Process	Purpose and guidelines of the contribution framework	Process	-	Active	-
2	White Flag Ordering	Mitigate conflict spamming by ignoring conflicts	Standards	Core	Active	Chrysalis
3	Uniform Random Tip Selection	Perform fast tip-selection to increase message throughput	Standards	Core	Active	Chrysalis
4	Milestone Merkle Validation	Add Merkle tree hash to milestone for local ledger state verification	Standards	Core	Active	Chrysalis
5	Binary To Ternary Encoding	Define the conversion between binary and ternary data	Standards	Core	Active	Chrysalis
6	Tangle Message	Generalization of the Tangle transaction concept	Standards	Core	Replaced by TIP-24	Chrysalis
7	Transaction Payload	UTXO-based transaction structure	Standards	Core	Replaced by TIP-20	Chrysalis
8	Milestone Payload	Coordinator issued milestone structure with Ed25519 authentication	Standards	Core	Replaced by TIP-29	Chrysalis
9	Local Snapshot File Format	File format to export/import ledger state	Standards	Interface	Replaced by TIP-35	Chrysalis
10	Mnemonic Ternary Seed	Represent ternary seed as a mnemonic sentence	Standards	IRC	Obsolete	Legacy IOTA
11	Bech32 Address Format	Extendable address format supporting various signature schemes and address types	Standards	Interface	Replaced by TIP-31	Chrysalis
12	Message PoW	Define message proof-of-work as a means to rate-limit the network	Standards	Core	Active	Chrysalis
13	REST API	Node REST API routes and objects in OpenAPI Specification	Standards	Interface	Replaced by TIP-25	Chrysalis
14	Ed25519 Validation	Adopt ZIP-215 to explicitly define Ed25519 validation criteria	Standards	Core	Active	Chrysalis
15	Dust Protection	Prevent bloating the ledger size with to dust outputs	Standards	Core	Replaced by TIP-19	Chrysalis
16	Event API	Node event API definitions in AsyncAPI Specification	Standards	Interface	Replaced by TIP-28	Chrysalis
17	Wotsicide	Define migration from legacy WOTS addresses to post-Chrysalis Phase 2 network	Standards	Core	Obsolete	Chrysalis
18	Multi-Asset Ledger and ISC Support	Transform IOTA into a multi-asset ledger that supports running IOTA Smart Contracts	Standards	Core	Active	Stardust
19	Dust Protection Based on Byte Costs	Prevent bloating the ledger size with dust outputs	Standards	Core	Active	Stardust
20	Transaction Payload with New Output Types	UTXO-based transaction structure with TIP-18	Standards	Core	Active	Stardust
21	Serialization Primitives	Introduce primitives to describe the binary serialization of objects	Standards	Core	Active	Stardust
22	IOTA Protocol Parameters	Describes the global protocol parameters for the IOTA protocol	Standards	Core	Active	Stardust
23	Tagged Data Payload	Payload for arbitrary data	Standards	Core	Active	Stardust
24	Tangle Block	A new version of TIP-6 that renames messages to blocks and removes the Indexation Payload in favor of the Tagged Data Payload. Replaces TIP-6.	Standards	Core	Active	Stardust
25	Core REST API	Node Core REST API routes and objects in OpenAPI Specification. Replaces TIP-13.	Standards	Interface	Active	Stardust
26	UTXO Indexer REST API	UTXO Indexer REST API routes and objects in OpenAPI Specification.	Standards	Interface	Active	Stardust
27	IOTA NFT standards	Define NFT metadata standard, collection system and creator royalties	Standards	IRC	Active	Stardust
28	Node Event API	Node event API definitions in AsyncAPI Specification. Replaces TIP-16.	Standards	Interface	Active	Stardust
29	Milestone Payload	Milestone Payload with keys removed from essence. Replaces TIP-8.	Standards	Core	Active	Stardust
30	Native Token Metadata Standard	A JSON schema that describes token metadata format for native token foundries	Standards	IRC	Active	Stardust
31	Bech32 Address Format for IOTA and Shimmer	Extendable address format supporting various signature schemes and address types. Replaces TIP-11.	Standards	Interface	Active	Stardust
32	Shimmer Protocol Parameters	Describes the global protocol parameters for the Shimmer network	Standards	Core	Active	Stardust
33	Public Token Registry	Defines an open public registry for NFT collection ID and native tokens metadata	Standards	IRC	Draft	Stardust
34	Wotsicide (Stardust update)	Define migration from legacy W-OTS addresses to post-Chrysalis networks. Replaces TIP-17.	Standards	Core	Obsolete	Stardust
35	Local Snapshot File Format (Stardust Update)	File format to export/import ledger state. Replaces TIP-9.	Standards	Interface	Active	Stardust
37	Dynamic Proof-of-Work	Dynamically adapt the PoW difficulty	Standards	Core	Withdrawn	Stardust

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