Verifair - Trustless Gaming Apps

[Proposal setup] Proposal title

Please provide your proposal title

Verifair - Trustless Gaming Apps

[Proposal Summary] Budget Information

Enter the amount of funding you are requesting in ADA

49333

[Proposal Summary] Time

Please specify how many months you expect your project to last

2

[Proposal Summary] Translation Information

Please indicate if your proposal has been auto-translated

No

Original Language

en

[Proposal Summary] Problem Statement

What is the problem you want to solve?

Cardano has a reputation for being difficult to build upon, but with the advent of a suite of easy-to-use ecosystem tools this is simply not true anymore.

[Proposal Summary] Supporting Documentation

Supporting links

• https://x.com/sharethlovelace/status/1881132069985923396
,
• https://github.com/while0x1/hashFishing

[Proposal Summary] Project Dependencies

Does your project have any dependencies on other organizations, technical or otherwise?

No

Describe any dependencies or write 'No dependencies'

No dependencies

[Proposal Summary] Project Open Source

Will your project's outputs be fully open source?

Yes

License and Additional Information

MIT License

[Theme Selection] Theme

Please choose the most relevant theme and tag related to the outcomes of your proposal

Smart Contracts

[Campaign Category] Category Questions

Mention your open source license and describe your open source license rationale.

MIT unrestricted open source license.

Cryptocurrencies are built on a foundation of open, transparent and permissionless technologies. By using the unrestricted MIT license we stand by that ethos allowing anyone to use copy or modify the codebase.

How do you make sure your source code is accessible to the public from project start, and people are informed?

Our code and examples will be published to a public github repository and announcements for any updates via a public twitter profile. We will commit to answering any github issues and keeping the repository public.

How will you provide high quality documentation?

As the sole developer and proposer there is no barrier to providing clear and accurate documentation for our dApp. Hours have been allocated in the project to provide documentation within the github repository.

[Your Project and Solution] Solution

Please describe your proposed solution and how it addresses the problem

Verifair is a first of kind example using onchain entropy to ensure verifiably fair and random outcomes for gaming and prize redemption. The contract provides reference material for interacting with Fortuna reference scripts and its datum format which can be used in a smart contract to provide verifiable, decentralized randomness.

The majority of Cardano reference material is written predominantly with functional style contracts and does not contain full-stack open source examples. This proposal provides approachable, comprehensive reference material for end to end application building, not just smart contract reference material.

The codebase wil provide the smart contract, off-chain code, and front-end web applications as well as a offchain game watching bot. The application will detail comprehensive examples of end-to-end application building for contract deployment, wallet and user management, web interfaces and utility libraries for maintaining the applications.

The smart contracts and offchain code are written with opshin and pycardano respectively and provide examples of core on-chain and offchain reference material. Opshin and pycardano are based on python, one of the most widely adopted and developer friendly languages in history. The offchain code includes examples for interacting with core Cardano infrastructure for creating performant dApps ( token registry, kupo, ogmios, koios).

The included web application code is user-friendly and portable, having no external dependencies. The web application code does not rely on any frameworks like react or nextJS, it is provided as 'vanilla' JavaScript, CSS and HTML. This makes it highly portable , approachable and modular. The applications provide examples of CIP30 wallet interaction, transaction signing and submission, and communication with offchain components.

[Your Project and Solution] Impact

Please define the positive impact your project will have on the wider Cardano community

Many Cardano applications are custodial and permissioned because it can be difficult to ensure secure and open dApps. We want to enable more dApps to be non-custodial, permissionless and decentralized. Verifair provides an example for using onchain entropy to provide fair, open and permissionless gaming platforms.

The proposal will also address gaps in Cardano reference material and education while also helping to attract new developers and reduce development friction. The majority of Cardano reference material is written predominantly with functional style contracts and does not contain full-stack open source examples. This proposal provides approachable, comprehensive reference material for end to end application building, not just smart contract reference material.

[Your Project and Solution] Capabilities & Feasibility

What is your capability to deliver your project with high levels of trust and accountability? How do you intend to validate if your approach is feasible?

The Verifair app has already been deployed to mainnet and tested using Fortuna block hashes to demonstrate verifiably fair gaming.

The proposer delivered a successful Fund 11 project ahead of time and on budget. The proposer is also a stake pool operator with over 4 years experience within the Cardano ecosystem.

[Milestones] Project Milestones

Milestone Title

Documentation

Milestone Outputs

1. Documentation describing how the application works and how the separate parts integrate will be published to github.
2. This documentation will also detail how to deploy and test the application locally.

Acceptance Criteria

1. The documentation is available on the public repository.
2. The documentation is clear, legible and understandable.
3. The documentation provides steps to deploy and run the application locally/exernally.

Evidence of Completion

The evidence of completion for an open-source project is the availability of the entire code on a public github repository. We will also publish the links to the repository within the final report.

Delivery Month

1

Cost

4933

Progress

10 %

Milestone Title

Publish CodeBase

Milestone Outputs

The entire application codebase is published to a public github repository including:

1. Smart contract code
2. Offchain application
3. Game watching bot
4. Web Application (server and associated files)

Acceptance Criteria

• The code is available on the repository
• The code is legible, readable, and functional.
• There are no missing elements which would be required to clone or reproduce the application.
• This repo will not include credentials, keys or IP addresses.

Evidence of Completion

• The evidence of completion for an open-source project is the availability of the entire code on a public github repository. We will also publish the links to the repository within the final report.
• The contract address will be published within the final report and repository and viewable via a cardano explorer.
• The reference utxo holding the script will also be published and viewable on any cardano explorer.

Delivery Month

1

Cost

39466

Progress

70 %

Milestone Title

PCR - Closeout Report and Video

Milestone Outputs

1. A project closeout report will be published to github detailing the project KPIs and how they were met.
2. A project closeout video will be recorded and published to github with a link published within the project closeout report.

Acceptance Criteria

PCR Contains:

• Name of project and Project URL on Catalyst
• Project Number/ID
• Name of project manager
• Date project started
• Date project completed
• List of challenge KPIs and how the project addressed them
• List of project KPIs and how the project addressed them
• Key achievements (in particular around collaboration and engagement)
• Key learnings
• Next steps for the product or service developed
• Final thoughts/comments
• Links to other relevant project sources or documents.
• Link to Close-out video - must be either YouTube or Vimeo link only

Evidence of Completion

The report is available on the public repository and the link is operable with the video being viewable on youtube/vimeo.

Delivery Month

1

Cost

9867

Progress

20 %

[Final Pitch] Budget & Costs

Please provide a cost breakdown of the proposed work and resources

• Contract Development: 48 hours
• Contract testing: 56 hours
• Offchain processing code: 120 hours
• Front-end web development: 112 hours
• Infrastructure Setup: 12 hours
• Documentation: 16 hours
• Project Management/PCR 6 hours

[Final Pitch] Value for Money

How does the cost of the project represent value for the Cardano ecosystem?

A full stack, open source dApp provides value for the cardano ecosystem by providing reference material for future developments. A competitive rate of 100USD/hour has been used for the project costing. This is not a proof of concept, the app is seeking retroactive funding for a complete and tested application.

[Required Acknowledgements] Consent & Confirmation

Terms and Conditions:

Yes