Inspiration
Modern organizations collaborate constantly — manufacturers with certifiers, hospitals with regulators, supply chain actors with auditors, universities with accreditation bodies, and so on. Yet the data they rely on lives in isolated systems, creating duplication, delays, and mistrust. We were inspired by this recurring pattern: Partners have shared information needs, but no shared trusted infrastructure. Smart contracts alone couldn’t solve this, because different partners often need custom logic, fine-grained data governance, and data-verification mechanisms that go beyond the constraints of a single app chain.
What it does
a chain where organizations can register, submit data proofs, verify each other’s claims, and operate from a common source of truth without sacrificing autonomy or privacy.
How we built it
Polkalink is a custom Substrate-based blockchain deployed to Polkadot Cloud. It includes:
Partner Registry Pallet A lightweight module allowing organizations to register with a role such as: Producer, Auditor, Certifier, Logistics Provider, Retailer This creates a verifiable identity layer directly on-chain.
Data Verification Pallet Partners can submit hashed data (e.g., IPFS CIDs), and authorized certifiers can approve or reject submissions. This allows ecosystems to coordinate on shared, trustworthy data without exposing private files.
Web Frontend (React + Polkadot APIs) A user-friendly interface that lets partners: Register, View partner roles, Submit data, Verify incoming data, Track the verification lifecycle
Together, these components form a composable, decentralized data-sharing network.
Challenges we ran into
We wanted to build something practical—not a “blockchain for everything.” Balancing simplicity with real-world relevance was a challenge we navigated carefully.
Accomplishments that we're proud of
pallets intergrations
What we learned
We gained practical skills in:
- Parachain templates
- Runtime composition
- Cross-pallet dependency management
- RPC & API setup ## What's next for polkalink Adding more pallets based on users feedback
Log in or sign up for Devpost to join the conversation.