CHARLI3 - Open Source Oracle SDK

[Proposal setup] Proposal title

Please provide your proposal title

CHARLI3 - Open Source Oracle SDK

[Proposal Summary] Budget Information

Enter the amount of funding you are requesting in ADA

100000

[Proposal Summary] Time

Please specify how many months you expect your project to last

4

[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 lacks open, low-cost, trusted oracle data infrastructure. Developers waste resources reinventing solutions, slowing adoption, fragmenting the ecosystem, and limiting innovation.

[Proposal Summary] Supporting Documentation

Supporting links

• https://www.charli3.io
,
• https://portal.charli3.io
,
• https://docs.charli3.io/oracles/products/pull-oracle/summary
,
• https://charli3-official.github.io/charli3-dendrite/
,
• https://charli3.io/products/charli3-dendrite

[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: https://opensource.org/license/mit

[Theme Selection] Theme

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

Infrastructure

[Campaign Category] Category Questions

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

MIT License

We are releasing under the MIT License to ensure maximum openness, flexibility, and adoption. MIT allows anyone to use, modify, and distribute our push/pull oracle infrastructure with minimal restrictions. Cardano urgently needs broad oracle adoption to scale and remain resilient in volatile markets. By removing barriers and enabling community contributions, we strengthen trust, accelerate innovation, and empower new builders to adopt and extend the solution as a shared public good.

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

At project start we will migrate our private GitHub repos into a public, organized repository. An SDK with docs, demos, and contribution guidelines will guide developers in deploying oracle networks. To ensure awareness, we’ll run a community campaign, provide regular updates, and directly inform major protocols and labs that our on-demand infrastructure is open, transparent, and ready for review and adoption.

How will you provide high quality documentation?

As with Charli3 Dendrite — our open source DEX aggregator with 2000+ monthly visitors — we will use that level of documentation quality as the baseline for this project (see: https://charli3-official.github.io/charli3-dendrite/)..) In addition, the Charli3 team has already delivered comprehensive documentation for our managed services (https://docs.charli3.io/)..) We will apply these proven practices to the SDK, ensuring clear guides, demos, and ongoing updates that meet the community’s needs.

[Your Project and Solution] Solution

Please describe your proposed solution and how it addresses the problem

Cardano’s ecosystem faces a well-known bottleneck: the absence of robust, open-source oracle infrastructure. Developers building DeFi platforms, lending protocols, enterprise applications, or research projects all require reliable data feeds. Today, they face a stark choice:

• Reinvent infrastructure from scratch, burning time and capital to replicate what has already been built; or
• Depend on closed, proprietary services, which introduce cost, trust, and centralization concerns that conflict with Cardano’s ethos of decentralization.

This dynamic slows adoption, fragments innovation, and creates unnecessary barriers for smaller teams. It also creates an unhealthy reliance on “band-aid solutions” — partial, siloed implementations that are difficult to scale.

Charli3 has already solved this problem. Since 2021, before smart contracts or native tokens even existed on Cardano, our team has invested thousands of hours and millions of dollars to build production-grade oracle infrastructure. We developed two complete systems:

1. Push-based (heartbeat) oracles
   1. Data is pushed on-chain at defined intervals or when triggers such as price thresholds are met. This design is suited for continuous feeds like asset prices, indexes, or stablecoin reserves.
   2. https://docs.charli3.io/oracles/products/push-oracle/summary
2. Pull-based (on-demand) oracles
   1. Data is only delivered when explicitly requested by a smart contract. This reduces costs, improves scalability, and is particularly valuable for DeFi and lending protocols.
   2. https://docs.charli3.io/oracles/products/pull-oracle/summary
   3. https://milestones.projectcatalyst.io/projects/1100090
   4. https://github.com/Charli3-Official/swap-demo-contract
   5. https://github.com/Charli3-Official/swap-demo-contract/blob/main/swap_demo_contract/docs/odv-request.org

Both infrastructures are complete, tested, and functional. The problem is no longer technical feasibility — it is accessibility. These systems are locked in private repositories. Without open access, developers cannot build on them, extend them, or benefit from them.

The proposed solution

This proposal is not about “building something new” that may or may not succeed. It is about responsibly converting years of proven, closed-source R&D into a high-quality, community-owned public good.

The grant covers:

• Repo migration and organization — moving multiple private codebases into public GitHub repos, with clear structure and contribution guidelines.
• SDK development — creating developer-friendly tooling, helper functions, and demos that make it simple to integrate and deploy oracles.
• High-quality documentation and tutorials — drawing on our track record with Charli3 Dendrite and managed services, we will provide guides, examples, and diagrams that make the infrastructure accessible to developers of all levels.
• Community outreach and onboarding — running awareness campaigns, contacting major protocols and labs, and inviting contributors.
• Sustainability — ensuring repos are updated, maintained, and open to contributions.

Deliverables

It is true that many grant proposals focus on building something new and open-sourcing it. But building from scratch introduces enormous risk: delays, technical failure, lack of adoption. By contrast, this proposal funds the transition of already-mature infrastructure into a shared asset. This means the community sees immediate impact: developers can adopt the codebase the day it is released.

Creating a Cardano Community Asset

The grant is not for past development, but for ensuring that existing, production-grade infrastructure becomes a shared public good. This means more than releasing code: it requires organized repos, an SDK, documentation, and community onboarding. With this support, the Cardano ecosystem gains not just access to code, but a usable, extensible foundation that will grow with the community.

[Your Project and Solution] Impact

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

The impact of this project is broad, immediate, and long-lasting.

1. Immediate availability of infrastructure: Because the code already exists and has been tested, developers can use it the moment it is released. This dramatically accelerates ecosystem growth compared to funding new builds that take years to mature.
2. Lower barriers to entry: With the MIT license, infrastructure becomes cost-free. Smaller teams, community builders, and research projects can access the same high-quality oracles as larger enterprises
3. Accelerated innovation: Instead of spending resources to rebuild core infrastructure, developers can focus on building applications — lending markets, derivatives, insurance, cross-chain protocols, and more. This multiplies the pace of experimentation and growth.
4. Trust and transparency: Open code can be audited, verified, and extended by anyone. This reduces reliance on a single provider and strengthens Cardano’s decentralized ethos.
5. Community ownership: The code will not belong to Charli3 alone. By inviting contributors and enabling forks, the infrastructure becomes resilient and adaptive to the community’s needs.
6. Reduced fragmentation: A shared standard prevents duplication of effort and ensures that builders are not siloed into competing, incompatible solutions.

In short, this proposal transforms oracle infrastructure from a private asset into a shared public good. The result is faster growth, broader participation, and a stronger foundation for Cardano’s future. The TL;DR is that not enough protocols are using a secure data infrastructure -- the impact we hope to drive is to increase adoption so the ecosystem is ready when the market volume increases damatically and data fluctuates aggressively. Our intent is to not drive profits for Charli3, but to give back to a community that has given so much to us.

[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 Charli3 team has a proven track record of delivering on community-funded projects. To date, we are on track to complete 11/11 Catalyst projects — a 100% delivery rate. This includes the pull-based oracle innovation, which was itself funded by Catalyst. That project demonstrates not only our technical capacity but also our accountability to the community.

Pull oracle project: https://milestones.projectcatalyst.io/projects/1100090

We also successfully delivered Charli3 Dendrite, an open-source DEX aggregator with 2000+ monthly visitors, complete with high-quality documentation (https://charli3-official.github.io/charli3-dendrite/)..) Our managed services also include professional-grade documentation (https://docs.charli3.io), proving our ability to produce accessible resources that are actually adopted.

Why trust us

• Proven delivery: 9/11 Catalyst projects completed, including oracle infrastructure. 2 pending approval for 11/11.
• Open source experience: Dendrite adoption shows we know how to release and support open code.
• Existing infrastructure: Unlike speculative builds, our systems already work and only need to be migrated responsibly.
  • Two independent external audits completed:
    • https://milestones.projectcatalyst.io/projects/1100094 by Anastasia Labs in 2024
    • https://skynet.certik.com/projects/charli3 by CertiK in 2022
• Clear validation path: Feasibility is not in question — the code already exists and has been used.

How validation will occur

• Public repositories: Migration into GitHub means code is open for immediate community audit.
• SDK and demos: Developers can deploy oracles quickly, proving usability.
• Protocol adoption: Early integrations with DeFi and lending protocols will demonstrate practical feasibility.
• Community contributions: Pull requests, forks, and extensions will show that the code is being actively used and improved.

This proposal is both low-risk and high-impact. Our track record, combined with existing infrastructure, provides trust and accountability. The grant ensures that the work of responsibly migrating, documenting, and supporting the system is completed to a high standard, delivering lasting value to Cardano.

[Milestones] Project Milestones

Milestone Title

Repository Migration & Public Setup

Milestone Outputs

We will migrate our private repositories into a newly created public GitHub organization. Codebases will be restructured, licensed under MIT, and prepared with READMEs, contribution guidelines, and a roadmap outline to support future community collaboration.

Acceptance Criteria

At least two repositories are made fully public and visible, licensed under MIT, and structured with documentation that enables any developer to clone, explore, and begin understanding the codebase. Contribution guidelines and a roadmap must also be in place to show how future work can be organized.

Evidence of Completion

We will provide public GitHub links to the repositories along with a short demo video walkthrough showing repo structure, files, and accessibility. This ensures reviewers can verify the milestone simply by clicking links and viewing the video.

Delivery Month

1

Cost

30000

Progress

30 %

Milestone Title

SDK Foundation & Core Documentation

Milestone Outputs

We will release the first version of the SDK, including helper functions, utilities, and a basic integration example. Documentation will cover installation, setup, and high-level architecture, with room to expand tutorials and additional language bindings as the project matures.

Acceptance Criteria

The SDK must be installable via package manager or repository clone and include at least one tested integration example. Documentation must explain SDK setup and usage clearly, including architecture overviews. All resources must be hosted online (e.g., GitHub Pages) so developers can access them without restriction.

Evidence of Completion

We will provide a link to the SDK release and the documentation website. A demo video will show installation, setup, and the integration example working locally. Reviewers only need to view the site and video to confirm completion.

Delivery Month

2

Cost

30000

Progress

60 %

Milestone Title

Demo Oracle Networks

Milestone Outputs

We will provide at least two demo oracle networks (push and pull) along with reference contracts, testnet deployments, and walkthroughs.

These demos will serve as templates for future implementations, and we may extend them with extra integrations depending on progress.

Acceptance Criteria

Two demo networks (push and pull) are deployed to Cardano testnet with visible transaction history. Documentation explains how they function and how a developer could redeploy them. A walkthrough video demonstrates both demos in action end-to-end.

Evidence of Completion

We will provide links to the demo repositories, testnet explorer transaction IDs, and a demo video recording showing both oracle deployments working. This ensures reviewers can confirm completion without needing to deploy anything themselves.

Delivery Month

3

Cost

30000

Progress

90 %

Milestone Title

Community Outreach, Close-Out & Sustainability

Milestone Outputs

We will deliver a community outreach campaign to raise awareness, including at least three public announcements (social posts, forum updates, or blog entries) and one recorded demo or workshop video highlighting how to use the SDK and oracle networks. In addition, we will complete the required Catalyst close-out deliverables: a written close-out report and a close-out video summarizing the project, milestones, and outcomes. Finally, we will publish a brief sustainability plan outlining how the repositories, SDK, and documentation will be maintained and supported over the next 6–12 months to ensure long-term impact.

Acceptance Criteria

Outreach is completed and verifiable through public posts and a workshop/demo video. A Catalyst close-out report is submitted, and a close-out video is produced and uploaded to YouTube. A sustainability plan is published publicly, showing how the project will remain maintained, updated, and open to community contributions for at least 6–12 months after funding ends.

Evidence of Completion

We will provide links to the outreach posts, the workshop/demo video, and the sustainability plan hosted on GitHub or Google Docs. The Catalyst close-out report will be submitted as required, and the close-out video will be published on YouTube/Vimeo/Acceptable source with the link shared. A summary video will be created to showcase the outputs for reviewers.

Delivery Month

4

Cost

10000

Progress

100 %

[Final Pitch] Budget & Costs

Please provide a cost breakdown of the proposed work and resources

Cost Breakdown of the Proposed Work and Resources

Overview

The total budget requested is 100,000 ADA (approximately 90,000 USD at current rates). This amount is distributed across four milestones tied directly to deliverables. The milestone-based structure ensures accountability, transparency, and measurable progress at every stage. Each cost reflects the development, documentation, and community resources needed to responsibly open-source and operationalize years of prior work.

//

Milestone 1 (30,000 ADA) — Repository Migration & Public Setup

Scope:

• Migration of multiple private repositories into a structured public GitHub organization.
• Cleaning and refactoring of code for public release.
• Preparing base documentation (README, LICENSE under MIT, CONTRIBUTING guidelines, roadmap outline).
• Demo video and walkthrough showing repo accessibility and structure.

Resource breakdown:

• 2 developers (160 hours @ 100 ADA/hr): 16,000 ADA
• Technical writer (40 hours @ 75 ADA/hr): 3,000 ADA
• Project management, repo setup, and overhead: 5,000 ADA
• Contingency & review (security/licensing checks): 6,000 ADA

Total: 30,000 ADA

//

Milestone 2 (30,000 ADA) — SDK Foundation & Core Documentation

Scope:

• First SDK release with helper functions, utilities, and one working integration example.
• Documentation covering installation, setup, and architecture.
• Demo video showing installation, setup, and integration workflow.

Resource breakdown:

• 3 developers (200 hours @ 100 ADA/hr): 20,000 ADA
• Technical writer (60 hours @ 75 ADA/hr): 4,500 ADA
• Documentation platform setup (GitHub Pages, publishing tools): 2,500 ADA
• Project management, QA, packaging, and release: 3,000 ADA

Total: 30,000 ADA

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Milestone 3 (30,000 ADA) — Demo Oracle Networks

Scope:

• Deployment of two demo networks (push + pull oracle).
• Reference smart contracts and testnet demonstrations with transaction history.
• Documentation and video walkthroughs of both demo deployments.
• Templates provided for developers to redeploy independently.

Resource breakdown:

• 3 developers (180 hours @ 100 ADA/hr): 18,000 ADA
• Smart contract engineer (50 hours @ 120 ADA/hr): 6,000 ADA
• Technical writer (40 hours @ 75 ADA/hr): 3,000 ADA
• QA, testing, and deployment costs (testnet ops, monitoring tools): 3,000 ADA

Total: 30,000 ADA

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Milestone 4 (10,000 ADA) — Community Outreach, Roadmap, and Catalyst Close-outs

Scope:

• Community outreach campaign including announcements, posts, and one demo/workshop video.
• Catalyst-required close-out deliverables: close-out report and video summarizing project milestones and outcomes.
• A sustainability plan outlining how the repositories, SDK, and documentation will be maintained for 6–12 months post-grant.

Resource breakdown:

• Community manager/outreach (40 hours @ 75 ADA/hr): 3,000 ADA
• Video production and editing (demo + close-out video): 2,500 ADA
• Project management and Catalyst close-out report: 2,000 ADA
• Sustainability planning and post-grant support: 2,500 ADA

Total: 10,000 ADA

Why the cost represents strong value

Unlocking prior investment: This infrastructure has already consumed thousands of development hours and significant private funding. For 100,000 ADA, the Cardano community gains immediate access to production-grade systems.

Cost-effective: For the equivalent cost of a single mid-sized dApp build, Cardano receives open-source oracle infrastructure usable by every DeFi, lending, or enterprise team. The ecosystem avoids duplicated costs across multiple projects.

Low risk, high return: Deliverables are tied to working infrastructure, not speculative research. Each milestone produces visible, verifiable outputs.

Long-term benefit: MIT-licensed repositories, SDK, and sustainability planning ensure Cardano continues to benefit from this work well beyond the 4-month funding window.

[Final Pitch] Value for Money

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

The requested budget represents an efficient investment relative to the value delivered. Charli3 has already invested years of development time and millions of dollars into building production-grade push and pull oracle infrastructure. This proposal does not fund speculative R&D — it unlocks a proven system and transforms it into a public good that any Cardano developer can use.

For 100k ADA, the community receives:

1. Full open-sourcing of enterprise-grade infrastructure under the MIT license.
2. A developer SDK, documentation, and demos that lower integration barriers.
3. Testnet-deployed reference implementations of push and pull oracles.
4. Community outreach, sustainability planning, and Catalyst close-out deliverables.

If each DeFi or enterprise team were forced to build oracles independently, the ecosystem would spend far more than 100k ADA duplicating work. By funding this project once, Cardano gains shared, resilient infrastructure that will accelerate adoption across multiple protocols, reduce cost and risk for builders, and strengthen the ecosystem’s long-term competitiveness.

[Required Acknowledgements] Consent & Confirmation

Terms and Conditions:

Yes