Abstract: The present application proposes a blockchain node synchronization method and device using a trust mechanism. The method comprises: acquiring data throughput history data of each node in a routing table of a node to be synchronized; acquiring synchronization success rate history data of each node in the routing table of the node to be synchronized; acquiring a total difficulty value of a blockchain currently stored by each node in the routing table of the node to be synchronized; determining a credibility of each node in the routing table according to the data throughput history data, the synchronization success rate history data, and the total difficulty value of the blockchain; and selecting, according to the credibility of each node, a target node for synchronization, and synchronizing, according to blockchain data stored by the target node, the node to be synchronized.

Abstract: The present application proposes a blockchain node synchronization method and device using a trust mechanism. The method comprises: acquiring data throughput history data of each node in a routing table of a node to be synchronized; acquiring synchronization success rate history data of each node in the routing table of the node to be synchronized; acquiring a total difficulty value of a blockchain currently stored by each node in the routing table of the node to be synchronized; determining a credibility of each node in the routing table according to the data throughput history data, the synchronization success rate history data, and the total difficulty value of the blockchain; and selecting, according to the credibility of each node, a target node for synchronization, and synchronizing, according to blockchain data stored by the target node, the node to be synchronized.

Abstract: A method and a device for synchronizing a node of a blockchain includes: acquiring information of a plurality of nodes adjacent to a node to be synchronized, and information of a plurality of nodes adjacent to an XOR node of the node to be synchronized, and determining candidate nodes according to the acquired information of the nodes; selecting a first predefined number of nodes from the candidate nodes as a newly added node; updating, according to information of the newly added node, a routing table of the node to be synchronized, to obtain an updated routing table; and synchronizing, according to the updated routing table, the node to be synchronized.

Abstract: A virtual currency value estimation method and apparatus and a storage medium. The virtual currency value estimation method comprises: acquiring historical transaction information of a blockchain system, wherein the historical transaction information comprises: a user identifier corresponding to each transaction and the number of virtual currencies used in the transaction; determining a head user currently in the blockchain system according to the user identifier corresponding to each transaction and the number of virtual currencies used in the transaction; determining transaction data of the head user within a current preset time period according to transaction information of the blockchain system within the current preset time period; estimating a market value of a virtual currency according to the transaction data within the current preset time period and a current price variation value of the virtual currency.