Dwarna is a blockchain-based application designed for biobanks and medical research institutions to implement dynamic consent with research participants. It allows individuals who contribute biospecimens to actively choose which studies their samples are used for, transforming them into ongoing partners in the research process.

• Immutable Consent Trail: Uses a Hyperledger Fabric blockchain to record every consent change, creating a permanent and tamper-evident audit log for compliance and transparency.
• Dynamic Participant Portal: Serves as a web-based portal, delivered via a plugin, where research partners can review and update their consent preferences over time.
• Modular Architecture: Consists of three integrated components: a web plugin for the user interface, a REST API for business logic, and the blockchain network for secure data storage.
• Automated Data Management: Includes scripts for system installation, backups, data restoration, and scheduled tasks to simplify operational maintenance.
• Research-Focused Design: Built specifically for the ethical and logistical requirements of biobanking, as detailed in published academic literature on the subject.