Renewable energy use has been increasing with environmental concerns due to pollution generated by energy sources like coal, nuclear, and oil. Even though initially, the cost of renewable energy was much higher than power from dirty sources, the gap in cost has been decreasing. With lower prices, people are installing solar panels to reduce their electricity bill or, in some cases, even sell the surplus generated energy to the grid and earn credits from the grid operator. When people sell power to the grid, they become what we call prosumers. Generally, prosumers are limited to trade the energy they generate with the grid, which is dominant in price determination. Decentralized energy markets might increase both market competitivity and incentive to further the adoption of renewable energy by people. Also, a centralized energy market presents security vulnerabilities and a lack of resiliency. In this context, Blockchain is a widely studied technology to provide decentralization for energy markets, mainly because of Blockchain`s capabilities of being a cyber-resilient, immutable, transparent, and secure distributed database. The literature shows many solutions to coupling Blockchain and energy markets, but there is still a lot of research to be done to enable it. Scalability, privacy, market design, and user security are some of the open research topics of this kind of application. The usual Blockchain solutions also consider the presence of a smart meter to watch the energy flow in or out of a house, and they might be vulnerable. In this document, we present a work proposal to deal with privacy and scalability solutions for the blockchain energy trading scheme, and we also propose to suggest scheme architecture guidelines.

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