Introduction

Decentralised Digital Registry for the Blood Banks

Context

People entering hospitals need some kind of blood transfusion everyday. Transfusions are needed to replace the blood of those suffering from cancer or other blood diseases and replenish blood lost in serious accidents.Once blood is collected, it needs to be preserved. As per the reports from Asia and Africa, there is a wastage of 20 % of blood collected. This happens due to incorrect procedures in transportation and storage. Currently there are no proper audits. For blood components, let us take a conservative estimate that only 25% blood is separated into components

Constraints

Instrumentation Issues in the devices used for blood irradiation.
Background check of blood bank working staff
Lack of resources in the blood bank for blood irradiation
Lack of a common and collective shared database
Lack of proper storage of blood components
Decrease in blood availability
Blood demand/supply mismatch
High blood storage costs
Blood obsolescence in 41 days
Absence of a shared registry
Absence of a common identification
No exchange information system of blood banks

Solution

Donor profile can be linked to the blood bag through anonymous manner
Blood Donation History can be verified on the Blockchain
Donor can verify and validate the usage of blood in real time
Exclusion of unsafe blood donors through transparent manner
Blockchain can help track provenance in the blood supply line making it more transparent
Blockchain can help to verify the credentials of the blood banks
Blockchain can help to track the blood bags through encrypted QR codes
Blockchain can help to validate the quality of the Blood Bank instruments

Components

Web App on ReactJS & NodeJS
Blood Bank Data Verification on High Scalable Blockchain
Blood Bank Data Encryption using Zero Knowledge Proofs
Blood Bank Donor Solution using Verifiable Randomness
Blood Bank Data Collection using Interplanetary File System (IPFS)

Benefits

Bulk Blood Transfer
Better tracking of blood usage.
Ensure blood availability for all the needy
Provide a verifiable and effective system to check quality and expiry of blood.
Provide real time information about blood products
Determine the cost-effective blood donation promotion system.
Reduce cost of blood storage and management.
Increase availability of rare blood types.
Provide effective support for the less than shelf-life inventory strategy.

Highlights

Blood Bank Data Feeds as Decentralised Oracles protected by Verified Delay Functions
Verified Delay Functions (VDFs) based Beacon Contract from StarkWare Veeddo Randomness
Proof of Blood Bank Donor Consent Generated from ZK Snarks over Zokrates Tool
Blood Bank DataFeed Oracle and Donor Consent Proof Smart Contracts Deployment