Hacash is a proof-of-work and programmable cryptocurrency system. It is the first cryptocurrency that can both decentralize and regulate the money supply to keep purchasing power stable. The entire monetary system consists of three different types of PoW coins: HACD, BTC, and HAC, each with unique properties. Hacash can be divided into three tiers. The first layer includes the ASIC-resistant X16RS mining algorithm, the 51% attack-resistant Parllay protocol, readable contracts, optional privacy, a stake account model, and one-way BTC transfers. Layer 2 serves as a channel chain settlement network, enabling large-scale instant payments of HAC and BTC. Layer 3 is an application ecosystem extension layer based on Layer 1 and Layer 2, supporting various rollup technologies and multi-chain protocols. Following the privacy principles of Bitcoin Satoshi Nakamoto, the project is 100% open-source and anonymous....