Nerthus is a universal blockchain programming platform based on DAG technology, a decentralized and distributed blockchain operating system. It can solve the problems faced by traditional blockchain systems such as low throughput, transaction confirmation delay, and block expansion. Nerthus has its own Turing complete programming language Witstone and runtime environment OVM, compatible with Ethereum's Solidity, which can be used to write Nerthus smart contract language, greatly reducing developers' learning costs, enabling them to write Nerthus smart contracts in a short time, construct and define their own various features, develop their own applications and blockchain systems, and issue their own currency....