[Proposal setup] Proposal title
Please provide your proposal title
Exura Transaction Intelligence API + GameChanger Integration
[Proposal Summary] Budget Information
Enter the amount of funding you are requesting in ADA
75000
[Proposal Summary] Time
Please specify how many months you expect your project to last
6
[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?
Users sign transactions without knowing exactly what will happen. This creates friction, risk, and fear of mistakes. No tool analyzes transactions and explain their effects before they are signed.
[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 beyond the core Exura backend.
[Proposal Summary] Project Open Source
Will your project's outputs be fully open source?
Yes
License and Additional Information
Will be released under MIT license
[Theme Selection] Theme
Please choose the most relevant theme and tag related to the outcomes of your proposal
DeFi
[Campaign Category] Category Questions
Mention your open source license and describe your open source license rationale.
We’re committed to open source as a core value. The codebase will be released under the MIT License to maximize adoption and reusability, allowing both community and commercial projects to benefit. We’ve already proven this commitment with our Hecate data relay (GPL-3), and see open licensing as essential to building shared infrastructure for Cardano.
How do you make sure your source code is accessible to the public from project start, and people are informed?
All source code will be public from day one in our GitHub repository. We’ll link directly to it from our official website, social channels, and development updates. Milestone completions will include code walkthroughs and changelogs so the community always knows where to find and track the latest version.
How will you provide high quality documentation?
We’ve been “documentation-first” since the earliest prototypes of our semantic engine. For this API, documentation will be developed alongside the code, not after. It will include:
- Clear setup and integration guides
- Complete API reference (OpenAPI spec)
- SDK examples in JavaScript/TypeScript and Python
- Use-case recipes for wallets, dApps, and analytics tools
- We’ll host it on a dedicated documentation platform with search, versioning, and contribution guidelines so developers can easily find, use, and improve it.
[Your Project and Solution] Solution
Please describe your proposed solution and how it addresses the problem
We’re building an open-source Transaction Intelligence API that can explain Cardano transactions before they’re signed — and interpret any signed transaction from the blockchain at any time, from its inputs, outputs and interactions.
How it works:
- Unsigned Transaction Analysis: Wallets, explorers or dApps send unsigned CBOR to the API. Using our declarative predicate engine, it identifies the protocol, detects the operation, calculates effects, and intent behind it.
- Human-Readable Output: Returns a plain-language description, operation(s) (assets sent/received, protocol changes), and other metadata.
- Historical Analysis: Given a transaction hash, retrieves and describes the transaction from on-chain data, enabling readable history and analytics.
Why this solves the problem:
- Before signing: Users see exactly what will happen, avoiding blind signing and costly mistakes.
- After signing: Users and apps can easily understand past transactions, improving transparency and trust.
- For developers: Drop-in, open-source API that eliminates the need to build protocol-specific logic for each app, allowing a trivial integration that works ecosystem-wide.
- Cardano’s eUTxO model makes this possible: deterministic transaction effects mean accurate predictions and clear interpretations without external data sources, just decentralized truth.
Real-world validation: GameChanger wallet
We’re building and validating this with the GameChanger team to meet real wallet needs. They will be our first integration partner, implementing:
- Pre-sign previews (so users understand before approving)
- Human-readable history (so past activity is easy to review)
This proves practical value from day one and sets a reference implementation for other wallets and apps.
[Your Project and Solution] Impact
Please define the positive impact your project will have on the wider Cardano community
For Developers 🧑💻
- Faster integration: Add transaction transparency in minutes, not months.
- Standard, not a silo: Coordinated work with wallets/dApps to align on language and schema.
- Lower support load: Clear explanations mean fewer “what happened?” tickets.
- Better UX: Apps stand out by giving users safety and clarity before signing.
- Wallet-grade validation: GameChanger serves as a clear reference others can follow.
For Users 😀
- No more blind signing: See what will happen in plain language before approving a transaction.
- Loss prevention: Helps identify risky operations and unexpected conditions.
- Confidence boost: Understanding encourages more participation in DeFi.
- Privacy control: Wallet-level toggle, validated with GameChanger.
- Universal benefit: Works in any wallet or app that integrates the API.
For the Ecosystem 🌐
- Lower entry barriers: New users feel safer exploring Cardano DeFi.
- Neutral stewardship: Keeps the layer independent and reliable for all teams.
- Compounding adoption: Each new integration protects more users and encourages more developers to join.
By preventing mistakes, saving developer time, and making DeFi approachable, the API will help grow Cardano’s user base, strengthen trust, and set a new UX standard for the ecosystem.
[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?
We’ve already experimented with proofs of concept of the core components. The underlying predicate engine has successfully processed thousands of transactions from different Cardano protocols, producing accurate interpretations and human-readable descriptions.
Why We Can Deliver
- Working prototypes: Our experimental semantic engine interprets historical on-chain DeFi activity across different Cardano protocols from real, mainnet transactions.
- Coverage focus: Initial patterns target protocols representing a majority (>60%) of Cardano DeFi TVL.
- Throughput tested: Internal replays on large datasets show stable performance and predictable latency.
- Partner alignment: Game Changer is committed as the first wallet integration partner.
Validation Approach
- Replay at scale: Run the pre-sign analyzer against known historical transactions; compare predicted effects to actual on-chain outcomes.
- Performance benchmarks: Measure accuracy, latency, and scalability as load increases.
- Developer validation (with GameChanger): Joint schema, integration guidelines, and must-pass scenarios.
- Transparent comms: Changelogs, known-issues, and roadmaps published openly.
Our approach is practical: build on tested prototypes, release early to real integrations, measure results against clear targets, and iterate quickly. All findings, including limitations, will be documented so the entire ecosystem benefits.
[Milestones] Project Milestones
Milestone Title
Core transaction handling
Milestone Outputs
Core CBOR intake and handling functionality:
- CBOR decoder for all transaction types
- Outcome description runs as with confirmed transactions
- Test suite runs and passes with 1000+ example transaction values
Acceptance Criteria
- The codebase in publicly accessible on GitHub and has an MIT LICENSE file.
- The repository can be cloned and installed locally for development or testing purposes
- Reported progress can be verified.
- Documentation explains the solution's design and implementation details
Evidence of Completion
- Project installs according to its README
- Test run results are positive under the specified parameters
- Documentation explains how the processing of deserializing and evaluating input transactions is deligned
Delivery Month
2
Cost
30000
Progress
40 %
Milestone Title
Developer-Ready API
Milestone Outputs
Project's API is ready for integration
- Live REST API with core endpoints to submit unsigned and confirmed transactions
- OpenAPI specification and documentation with examples
- Supported DeFi protocol list expanded
Acceptance Criteria
- All endpoints are functional and with less than 2 second latency
- Documentation includes examples for all the available endpoints
- Supported DeFi Protocols include dApp types other than Lending/DEXes
Evidence of Completion
- Live API endpoint URL has been published
- Published documentation website
- Descriptions for the transactions of the apps added during this milestone are accurate and protocol-specific (e.g. not just 'Assets Sent/received')
Delivery Month
4
Cost
22500
Progress
60 %
Milestone Title
GameChanger Wallet Integration in Production
Milestone Outputs
- GameChanger wallet successfully integrated and feature-complete.
- Integration performance measured and optimized for scale.
- Publised detailed implementation guidance and insights for the community.
Acceptance Criteria
- GameChanger wallet users can see, before submitting their transactions, the corresponding description as evaluated by the exura API.
- GameChanger wallet users can see, for each of their past DeFi transactions, the description that exura API provided.
Evidence of Completion
- In-wallet demo video (≤5 min):
- GameChanger showing: pre-sign explanations for swaps, LP add/remove, and a regular asset transfer;
- readable history for past DeFi transactions;
- Partner confirmation: short written statement from the GameChanger team that the feature is live to users and meets their production standards.
Delivery Month
6
Cost
22500
Progress
100 %
[Final Pitch] Budget & Costs
Please provide a cost breakdown of the proposed work and resources
Milestone tranches
- M1 – Core transaction handling → ₳30,000 (40%)
- M2 – Developer-ready API → ₳22,500 (30%)
- M3 – GameChanger wallet in production → ₳22,500 (30%)
Allocation by workstream
Engineering (~69% | ₳51,750): Protocol analysis, backend/API, schema design, testing and performance tuning.
Partner integration & UX (~23% | ₳17,250): In-wallet pilots with GameChanger, testing, wording alignment and rollout support.
Infrastructure & software (~8% | ₳6,000): Resource Hosting (local and cloud-based), development software licenses and other services.
No marketing or speculative spend. Funds go to build, integrate, document, and run 🌟
[Final Pitch] Value for Money
How does the cost of the project represent value for the Cardano ecosystem?
Our proposal provides a neutral, reusable API that lets wallets and other apps:
- Show clear, pre-sign previews of a transaction’s effects.
- Interpret past activity in plain language.
One protocol-agnostic service prevents duplicated effort and makes safety a consistent standard across the ecosystem.
Why it’s cost-effective
- Building this separately in each wallet/app would cost many times more and yield inconsistent results.
- Closed, proprietary options create lock-in and limited ecosystem input.
- Our proposal provides a universal, reusable tool that benefits every integration and compounds in value over time.
ROI
- If just 75 mistaken transactions of 1,000₳ are ever prevented, the avoided loss alone matches our ask.
- Developer time saved: integration versus bespoke builds can turn “months” into “days,” freeing teams to ship features.
- Safer UX increases user confidence, which tends to lift on-chain activity and reduce support load.
Strategic value
- Cardano’s eUTxO determinism uniquely enables accurate pre-sign effect previews—this is a genuine UX differentiator.
- A shared description standard makes Cardano easier to learn and harder to misuse.
- GameChanger serves as the reference integration, reducing adoption risk and providing a path others can follow.
Efficient spend
For less than a single developer’s annual salary, the ecosystem gains a production-grade explanation layer that protects users, saves engineering time across multiple teams, and strengthens Cardano’s competitive edge.
[Required Acknowledgements] Consent & Confirmation
Terms and Conditions:
Yes