Abstract: Disclosed are a consensus method and device, and a blockchain system. A primary node directly broadcasts a transaction hash list including a hash value of at least one unverified transaction in the system, so that a backup node and the primary node simultaneously verify the at least one unverified transaction, and the backup node stores a first verification result obtained by verification and a first hash value of the at least one unverified transaction. The primary node broadcasts an obtained second verification result and a second hash value of the at least one unverified transaction in a pre-preparation message after completing the verification, so that the backup node searches for the first verification result based on the second hash value, and broadcast a preparation message when the second verification result is the same as the searched first verification result, to enter a subsequent consensus stage, and complete the consensus processing.

Abstract: Embodiments of the disclosure disclose a method for orderly execution of cross-chain transactions and a cross-chain system. The method for orderly execution of cross-chain transactions includes: obtaining, by a main chain, a plurality of cross-chain transactions of a source chain; generating, by the main chain, a cross-chain transaction package for at least one of the plurality of subchains according to the plurality of cross-chain transactions, and distributing the cross-chain transaction package to the at least one subchain; and executing orderly, by the at least one subchain, the transactions in the cross-chain transaction package according to orders of the transactions in the cross-chain transaction package after obtaining the cross-chain transaction package. The embodiments of the disclosure may facilitate the orderly execution of cross-chain transactions.

Abstract: The embodiments of the disclosure disclose a method and system for cross-chain transfer of data based on decentralized identifiers. According to the disclosure, after receiving a data transfer transaction sent by a terminal of an original holder, a source chain reads a public key of the original holder in a corresponding first BID document according to a first BID carried by the data transfer transaction, and verifies a signature carried by the data transfer transaction. After the signature passes verification, the source chain initiates a cross-chain transaction. In response to the cross-chain transaction, a target chain deploys a second BID document in the target chain, and a public key of a new holder and data to be transferred are recorded in the second BID document. Further, the source chain replaces the public key of the original holder in the first BID document with the public key of the new holder.

Abstract: The disclosed method and system implement domain name registration and resolution based on a domain name group. The system comprises a registration client terminal, a registration server, and a resolution server. The registration server processes single domain name registration information and generates a unique identification for domain name group information, stores the domain name group information and stores registrant information and resolution information associated with the domain names, and feeds back a processing result to the registration client terminal. The resolution server acquires the domain names in the domain name group and resolution data shared by the domain names, and writes the domain names and the resolution data into resolution files according to top-level domain suffixes.