HDDcoin is an eco-friendly decentralized blockchain based on the Proof of Space and Time (PoST) consensus. It maintains the robustness of the network and conforms to Satoshi Nakamoto's principles.The goal of HDDcoin is to reshape the Global financial system through the power of blockchain technology, which is powered by thousands of nodes maintained by the community, and has transparency and commitment to the environment - so as to obtain control from any central entity, individual or organization, and return such control to the community....