An investigative prototype for consent handling using an ethereum blockchain under a consortium type setup with proof-of-authority, a web server (express on node) and a mongo database for user registration.

See the for full information on the solution.

Disclaimer! This is work in progress and do not by any means make any claims of being bug free, exhaustive or being a provider of a blockchain for this purpose. It contains a sample IT-service provided by a company, a set of public web applications for consent handling and registration, a PoA blockchain, source code and wiki describing the system analysis, information model, solution overview and contract model.

Ethereum version support: This is now updated for solc version 0.5.2 and geth version 1.8.21 and needs the Byzantium update due to STATICCALL to other contracts.

Feel free to contact me with any questions, comments or if you want to suggest changes, ideas or whatever

When one person voluntarily agrees to the proposal or desires of another.

This is a common use case when a company wants to perform processing of information collected from a person for a specific purpouse. For example: If a company collects data on a persons usage of a product with the intention of using that data to perform product improvements based on that data, the company needs to have a consent.