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CPS Title Status Category Authors Proposed Solutions Discussions Created License
16
Cardano URIs
Open
Tools
Adam Dean <adam@crypto2099.io>
2024-06-15
CC-BY-4.0

Abstract

Cardano URI schemes (CIP-13) have been defined since early 2021. However, some of the proposed standards have languished and struggled for adoption event as the amount of wallet developers in the ecosystem has skyrocketed. This CPS aims to create a centralized point of reference for those interested in creating new standards or publishing integration solutions.

Problem

A keen pain point in the utilization of blockchain is the archaic and convoluted processes necessary to interact with the blockchain or cite historical ledger data. Well-defined URI schemes can provide a plethora of easy access and interaction methods, particularly to mobile users, since they can leverage deep-linking and QR technologies to pass data between applications.

Use cases

The Cardano URI Scheme(s) that exist already present several fantastic use cases for URI schemes. We welcome additional or expanded definitions to be added to this section for further discussion, development, and adoption by the community.

Easy On-Chain Interactions

Payments

  1. The original specification of CIP-13 defined only the base web+cardano: scheme and an authority-less path consisting of a payment address and an optional amount query parameter to specify via QR code or deep-link an address and amount of Lovelace to send.
  2. In 2024 a new CIP was proposed defining an explicit //pay authority as well as path and query parameters to support Native Assets and transaction Metadata.

Staking/Delegation

  1. The first extension to CIP-13 added the //stake authority and some query parameter options to specify a Cardano Stake Pool. The goal of these URIs would be to make it easy for a user to switch their wallet's stake delegation to the pool in question. This could be performed via easy deep-link integration on stake pool website(s) and social media, and also through real-world advertising such as banners, flyers, and business cards at marketing and networking events.

Onboarding/Airdrops

  1. In 2023 CIP-99 was introduced, adding a //claim authority and defining a URI + wallet interaction protocol that would allow a user with only access to a URI to "claim" an airdrop of Lovelace and/or Native Assets assuming that both the wallet and the project server were correctly configured to follow the protocol.

Easy Historical Reference

Blocks and Transactions

  1. In 2023 CIP-107 was proposed, this CIP introduced the //block and //transaction authorities along with relevant path and query parameters. This novel use of URI structures allows for easy reference to specific events and points in time of the blockchain ledger's history. This proposal makes referencing a point in the chain's history relatively trivial which can be an important step in data availability layers for external on- and off-chain solutions.

Goals

The goals of this CPS are as follows:

  • Provide an easy-to-reference repository for all web+cardano: URI solutions to simplify integrations.
  • Define a list of known web+cardano: URI authorities to prevent overlap and collision by developers creating new solutions.
  • Provide a platform to centralize new discussions about emerging standards that may arise in the future.

Open Questions

  1. What can we do as a community to encourage more applications and software providers to support web+cardano: URIs?
  2. What software or best practices exist to aid developers in deploying support for web+cardano: URIs?
  3. What new authorities or protocols could be built to leverage these URIs?
  4. What does the process look like to register a new web+cardano: URI authority or protocol?

Proposal Process

Recent best practices in this repository suggest that the preferred method is for new standards that expand functionality should be defined as new, discrete CIPs unless the existing CIP provides for the capability of versioning and iterative improvement.

By creating separate, discrete CIPs for new standards this allows for a clean history of discussion and community consensus building around new standards as well as measurable progress towards adoption.

Registered URI Authorities

Per URI Syntax a URI consists of the following structure:

URI = scheme ":" ["//" authority] path ["?" query] ["#" fragment]

Given that the shared scheme of web+cardano: is known and accepted and the original version of CIP-13 declared an authority-less, path-only structure: **All future web+cardano: URI extensions MUST register a new, unique authority or SHOULD define a new version of an existing authority that has explicitly allowed for versioning in its definition.

The following are the currently registered URI authorities mentioned in CIPs:

  • null: (Blank/no Authority) registered in CIP-13
  • //stake: registered in CIP-13
  • //claim: supports versioning, registered in CIP-99
  • //transaction: supports versioning (?), registered in CIP-107
  • //block: supports versioning (?), registered in CIP-107
  • //addr/: registered in CIP-134

Copyright

This CPS is licensed under CC-BY-4.0.