C Streaming Protocol: Real-Time Continuous Payment Standard

[Proposal setup] Proposal title

Please provide your proposal title

C Streaming Protocol: Real-Time Continuous Payment Standard

[Proposal Summary] Budget Information

Enter the amount of funding you are requesting in ADA

68000

[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

Yes

Original Language

en

[Proposal Summary] Problem Statement

What is the problem you want to solve?

Cardano lacks a native streaming payment standard, limiting payroll automation, real-time service payments, DAO treasury flows, and fair subscription models.

[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

Please provide details on the intellectual property (IP) status of your project outputs, including whether they will be released as open source or retained under another licence.

All project outputs will be released under the MIT License. This includes the streaming smart contracts, cryptographic primitives, client libraries, and reference frontend. All source code, specs, and test vectors will be publicly available with no proprietary restrictions. The protocol design, state transition rules, and off-chain execution logic are fully open so developers can audit, extend, or integrate the Streaming Protocol as a reusable Cardano primitive.

[Theme Selection] Theme

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

Smart Contracts

[Campaign Category] Category Questions

Describe what makes your idea innovative compared to what has been previously launched in the market (whether by you or others).

The Cardano Streaming Protocol introduces continuous-time value transfer natively to UTxO, something not available on Cardano and only partially implemented on account-based chains like Ethereum (e.g., Superfluid).

Our innovation lies in:

• UTxO-native streaming using time-weighted state transitions without requiring central schedulers.
• Deterministic off-chain + minimal on-chain footprint, enabling streams with near-zero overhead.
• Cancelable, updatable, and composable streams that integrate directly with dApps (DAOs, payroll, subscriptions).
• Programmable hooks allowing streamed payments to trigger logic in other contracts (e.g., auto-yield distribution).
• Cross-chain consistency: design compatible with future Cardano sidechains and partner L2s.

This creates a new primitive for the Cardano ecosystem, enabling real-time financial flows while maintaining the security and concurrency guarantees of EUTxO.

Describe what your prototype or MVP will demonstrate, and where it can be accessed.

The MVP will demonstrate a fully functional end-to-end streaming payment flow on Cardano testnet:

• Create Stream: Sender defines rate, duration, asset type, and recipient.
• Real-Time Accrual: Off-chain logic calculates accrued balance deterministically without continuous transactions.
• Withdraw: Recipient withdraws any time, with the contract enforcing correct streamed value.
• Pause/Cancel/Update: Sender can modify parameters, with contract ensuring state safety.
• DApp Dashboard: A web UI shows live stream status, accrued balance, and event log.

The prototype will be deployed on Cardano Preprod testnet, with source code, API docs, and the UI publicly accessible on GitHub Pages (or Vercel). This ensures transparency, developer accessibility, and easy community testing.

Describe realistic measures of success, ideally with on-chain metrics.

Success metrics will be both quantitative and on-chain verifiable:

On-Chain Metrics

• ≥ 100 successful stream transactions created and settled on testnet.
• ≥ 50 unique wallets interacting with the protocol.
• 0 failed state transitions due to contract errors (verified via testnet logs).

Technical Delivery Metrics

Full open-source release of:

• Smart contract (Aiken/Plutus)
• TypeScript SDK
• MVP dashboard UI
• Documentation + test suite

End-to-end demo video published publicly.

Ecosystem Adoption Metrics

At least 3 external developers or dApps cloning or interacting with the repo during the fund period.

These metrics ensure the streaming protocol is functional, usable, verifiable, and positioned for mainnet adoption.

[Your Project and Solution] Solution

Please describe your proposed solution and how it addresses the problem

Cardano Streaming Protocol is a Real-Time Payment Layer for Cardano.

On-Chain Layer:

• Smart contracts storing stream metadata
• Deterministic time-based balance calculation
• Settlement via UTxO

Off-Chain Layer:

• SDK for stream lifecycle + calculations
• UI for monitoring flows
• Payroll module for hourly compensation

The protocol is designed to evolve into a future CIP (similar to ERC-1620/IDA on Ethereum).

[Your Project and Solution] Impact

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

• Fills a major missing primitive in Cardano DeFi
• Enables Web3 payroll, subscriptions, DAO streaming treasuries, and revenue-sharing models
• Creates reusable open-source components for future builders
• Reduces onboarding friction for Web2 enterprises
• Directly increases ADA utility in real-world finance (RealFi)

[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 are blockchain engineers experienced with:

• Plutus, Aiken
• TypeScript, Next.js
• Payment and treasury models

Commitments:

• 100% open-source (MIT license)
• Monthly progress updates
• Clear documentation and video demos

Feasibility:

Research on Superfluid/Sablier completed

Contract design adapted for the UTxO model

[Milestones] Project Milestones

Milestone Title

Protocol Architecture & UX/UI Specification

Milestone Outputs

A complete technical architecture for the Cardano Streaming Protocol, including validator logic design, UTxO-state machine model, datum/redeemer schema, lifecycle state transitions, and concurrency handling strategy. UX/UI wireframes cover all user flows: stream creation, accrual visualization, withdrawals, pause/resume, update, and multi-stream management. API schema (OpenAPI) and system diagrams included.

Acceptance Criteria

Architecture must fully specify all contract logic, state transitions, and off-chain computation boundaries. UX/UI wireframes must cover every user operation. Design must be internally validated for logical consistency, testability, and compatibility with Cardano testnet limits. Documentation must be complete enough that another team could implement the system without ambiguity.

Evidence of Completion

GitHub repository containing:

– Architecture specification (PDF/Markdown)

– State machine diagrams

– Datum/redeemer definitions

– UX/UI wireframes

– OpenAPI schemas

Tag release: Milestone-1-Architecture.

Delivery Month

1

Cost

10000

Progress

30 %

Milestone Title

Smart Contract & SDK Development

Milestone Outputs

A working testnet implementation of the streaming protocol. Deliverables include Plutus/Aiken smart contracts implementing create/update/pause/withdraw/cancel operations; a TypeScript SDK encapsulating serialization, transaction building, and off-chain accrual logic; and automated tests covering deterministic behavior, invalid-state prevention, and multi-stream concurrency.

Acceptance Criteria

Contracts must successfully deploy on Cardano testnet and process full stream lifecycle operations. SDK must provide callable functions for all contract interactions. Minimum 80% test coverage on core logic. End-to-end demo must create a real testnet stream and execute withdrawals without failure.

Evidence of Completion

GitHub repository with:

– Contract source code + build scripts

– Testnet deployment addresses

– Transaction hashes demonstrating successful operations

– TypeScript SDK + documentation

– Automated test reports

Tag release: Milestone-2-Contracts-SDK.

Delivery Month

3

Cost

42000

Progress

40 %

Milestone Title

Public Beta Deployment & Feedback Integration

Milestone Outputs

A publicly accessible beta running fully on Cardano testnet. Includes integrated contracts, SDK, and frontend prototype. Telemetry for performance, fee monitoring, and concurrency testing. A feedback pipeline collects user reports, evaluates issues, and applies fixes. Updated version released after improvements.

Acceptance Criteria

At least 50 external testers complete real stream interactions. All critical/high-severity bugs resolved. Public beta remains stable under concurrent operations. Performance benchmarks documented: fees, memory usage, datum sizes, and transaction validity rates. UI/UX improvements applied based on feedback.

Evidence of Completion

– Public beta URL

– Tester activity logs

– Performance benchmark report

– Bug resolution documentation

– Public demo showcasing testnet usage

Tag release: Milestone-3-Public-Beta.

Delivery Month

1

Cost

8000

Progress

20 %

Milestone Title

Final Report & Mainnet Launch Package

Milestone Outputs

A complete final reporting package including full protocol documentation, smart contract analysis, SDK guide, performance evaluations, and readiness assessment for mainnet deployment. Mainnet contract builds and deployment scripts included. All repositories open-sourced under MIT License with finalized documentation.

Acceptance Criteria

Final report must document security considerations, validator logic review, performance insights, SDK usage, and integration guidelines. All codebases must compile deterministically and pass internal audit checks. Mainnet-ready deployment scripts must be validated. Public repositories must be fully documented and accessible.

Evidence of Completion

– Final report (PDF + GitHub release)

– Fully documented open-source repositories

– Mainnet deployment package

– Release tag: v1.0-Mainnet-Ready

– Public announcement summarizing delivery

Delivery Month

1

Cost

8000

Progress

10 %

[Final Pitch] Budget & Costs

Please provide a cost breakdown of the proposed work and resources

The total budget requested is 68,000 ADA for a 6-month development period. The costs are allocated as follows:

Development Team Salaries – 38,000 ADA (56%)

Smart contract developers, backend and frontend engineers, and blockchain integrators.

Includes coding, testing, and integration with existing blockchain infrastructure.

System Architecture & Design – 10,000 ADA (15%)

Technical architecture planning, UX/UI design, and protocol specification.

Reporting & Documentation – 7,000 ADA (10%)

Preparation of technical reports, development progress reports, and documentation for stakeholders.

Infrastructure & Tools – 5,000 ADA (7%)

Cloud servers, development tools, and software licenses required for development and testing.

Project Management & Coordination – 5,000 ADA (7%)

Planning, milestone tracking, team coordination, and reporting.

Contingency – 3,000 ADA (5%)

Unexpected expenses and additional technical requirements that may arise during development.

[Final Pitch] Value for Money

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

The total budget requested for the development of the Streaming Protocol: Real-Time Continuous Payment Standard is 68,000 ADA. This budget will cover a 6-month development period, including system architecture design, smart contract development, integration with existing blockchain infrastructure, testing, security audits, and deployment. Costs also include team salaries, development tools, and necessary infrastructure to ensure a robust and scalable solution. The allocation ensures that resources are efficiently used while maintaining high technical standards and timely delivery.

[Self-Assessment] Self-Assessment Checklist

I confirm that evidence of prior research, whitepaper, design, or proof-of-concept is provided.

Yes

I confirm that the proposal includes ecosystem research and uses the findings to either (a) justify its uniqueness over existing solutions or (b) demonstrate the value of its novel approach.

Yes

I confirm that the proposal demonstrates technical capability via verifiable in-house talent or a confirmed development partner (GitHub, LinkedIn, portfolio, etc.)

Yes

I confirm that the proposer and all team members are in good standing with prior Catalyst projects.

Yes

I confirm that the proposal clearly defines the problem and the value of the on-chain utility.

Yes

I confirm that the primary goal of the proposal is a working prototype deployed on at least a Cardano testnet.

Yes

I confirm that the proposal outlines a credible and clear technical plan and architecture.

Yes

I confirm that the budget and timeline (≤ 12 months) are realistic for the proposed work.

Yes

I confirm that the proposal includes a community engagement and feedback plan to amplify prototype adoption with the Cardano ecosystem.

Yes

I confirm that the budget is for future development only; excludes retroactive funding, incentives, giveaways, re-granting, or sub-treasuries.

Yes

[Required Acknowledgements] Consent & Confirmation

I Agree

Yes