Abstract: The present disclosure provides a data synchronization method performed by a blockchain. The blockchain includes a hierarchical structure composed of a consensus node, a first service node and a second service node. The method includes: receiving, by the first service node, block header data issued, according to the hierarchical structure, by the consensus node; downloading, by the first service node, transaction hash data according to the block header data; receiving, by the first service node, a buffer mapping table of the second service node; and receiving, by the first service node according to the buffer mapping table of the second service node, the transaction content data transmitted by the second service node and corresponding to a storage index. The technical solution of this embodiment of the present disclosure can achieve a blockchain system having a segregation demand and an efficient and secure data synchronization solution in the system.

Abstract: This application provides an asset transferring method and apparatus based on multiple blockchains, a device, a medium, and a product. The method includes: obtaining a first cross-chain asset transfer-out request transmitted by a service object for a first cross-chain transfer-out transaction; writing transaction data of the first cross-chain transfer-out transaction carried in the first cross-chain asset transfer-out request into a first cross-chain bridge contract on a first chain; and invoking, when determining that the service object has a cross-chain asset transfer-out permission based on the first cross-chain bridge contract and service data information, a first asset contract on the first chain to lock a first asset, and generating a first cross-chain event corresponding to the first cross-chain transfer-out transaction. According to this application, the service stability of a service executed on a chain may be ensured based on a multi-blockchain architecture.

Abstract: This application discloses a multi-blockchain-based cross-chain processing method performed by a computer device acting as a management chain consensus node in a multi-blockchain system. The method includes: obtaining the multi-blockchain, wherein the multi-blockchain comprises a management chain and at least one other blockchain, and the management chain consensus node being located on the management chain; determining, in the multi-blockchain, at least two blockchains to be processed across chains; and performing cross-chain processing on the at least two blockchains based on chain information of the at least two blockchains. In this application, comprehensive management on the multi-blockchain is implemented in a cross-chain processing manner, which improves the processing efficiency of the multi-blockchain.

Abstract: Aspects of the disclosure are directed to a method for use on a blockchain network that includes an accounting node subnetwork having accounting nodes configured to record a data block onto a blockchain and a service node having service nodes configured to verify data blocks recorded by the accounting nodes onto the blockchain. The method can include generating a signature based on transaction information to be included in a data block to be added onto the blockchain by using a key specific to the accounting node. The method can further include adding the transaction information and the generated signature to the data block and adding the data block onto the blockchain, and transmitting the signature to the service nodes in the service node subnetwork, so that the service nodes perform signature verification on the signature based on the key specific to the accounting node.

Abstract: This application provide a data management method performed at a blockchain system. The system includes an accounting node sub-network and a service node sub-network. The method includes: generating a first data block in the accounting node sub-network; adding first key information to a block header of the first data block; adding signature corresponding to the first data block to the block header of the first data block; and releasing the block header of the first data block to the service node sub-network. The service node sub-network is configured to verify the signature comprised in the block header of the first data block, and obtain the first key information after a successful verification.

Abstract: A blockchain data processing method is performed by an electronic device. The method includes: packaging a local consensus transaction, a main chain binding height, and a main chain read dataset into a local consensus block; broadcasting the local consensus block to a local verification node, where the local verification node is configured to obtain obtaining a voting consensus result corresponding to a transaction execution result of the local consensus transaction when a synchronized block height is greater than or equal to the main chain binding height, and a synchronized read dataset is consistent with the main chain read dataset; and uploading, when determining that consensus is reached based on the voting consensus result returned by the local verification node, the local consensus block to a local consensus sub-chain corresponding to a local consensus network.

Abstract: A processing method includes acquiring, by a first service node of a first blockchain, a cross-chain transfer request, the cross-chain transfer request including a virtual resource value, a first resource transfer-out address on the first blockchain, and a first resource transfer-in address on a second blockchain. The cross-chain transfer request is used by a second service node of the second blockchain to lock a first virtual resource of the virtual resource value in the second blockchain. The method further includes performing resource transfer-out processing on a second virtual resource associated with the virtual resource value in the first resource transfer-out address in response to a determination that the second service node locked the first virtual resource successfully. The method further includes transferring the first virtual resource to the first resource transfer-in address in the second blockchain in response to a determination that the second virtual resource was transferred out.

Abstract: A blockchain-based data processing method, performed by a side chain node, includes obtaining a transaction on-chain request carrying a business transaction transmitted by a business device, determining a transaction execution result corresponding to the business transaction based on the transaction on-chain request, and performing on-chain processing on the transaction execution result and the business transaction; generating business transaction digest information corresponding to the business transaction based on a transaction sequence number, a business type identifier, and the transaction execution result in response to the transaction execution result and the business transaction being successfully stored in a side blockchain; and transmitting the business transaction digest information to a main blockchain to store the business transaction digest information.

Abstract: Aspects of the disclosure are directed to a method for use on a blockchain network that includes an accounting node subnetwork having accounting nodes configured to record a data block onto a blockchain and a service node having service nodes configured to verify data blocks recorded by the accounting nodes onto the blockchain. The method can include generating a signature based on transaction information to be included in a data block to be added onto the blockchain by using a key specific to the accounting node. The method can further include adding the transaction information and the generated signature to the data block and adding the data block onto the blockchain, and transmitting the signature to the service nodes in the service node subnetwork, so that the service nodes perform signature verification on the signature based on the key specific to the accounting node.

Abstract: This application provides an asset transferring method and apparatus based on multiple blockchains, a device, a medium, and a product. The method includes: obtaining a first cross-chain asset transfer-out request transmitted by a service object for a first cross-chain transfer-out transaction; writing transaction data of the first cross-chain transfer-out transaction carried in the first cross-chain asset transfer-out request into a first cross-chain bridge contract on a first chain; and invoking, when determining that the service object has a cross-chain asset transfer-out permission based on the first cross-chain bridge contract and service data information, a first asset contract on the first chain to lock a first asset, and generating a first cross-chain event corresponding to the first cross-chain transfer-out transaction. According to this application, the service stability of a service executed on a chain may be ensured based on a multi-blockchain architecture.

Abstract: This application discloses a multi-blockchain-based cross-chain processing method performed by a computer device acting as a management chain consensus node in a multi-blockchain system. The method includes: obtaining the multi-blockchain, wherein the multi-blockchain comprises a management chain and at least one other blockchain, and the management chain consensus node being located on the management chain; determining, in the multi-blockchain, at least two blockchains to be processed across chains; and performing cross-chain processing on the at least two blockchains based on chain information of the at least two blockchains. In this application, comprehensive management on the multi-blockchain is implemented in a cross-chain processing manner, which improves the processing efficiency of the multi-blockchain.

Abstract: This application provide a data management method for a blockchain system, a medium, and an electronic device. The system includes an accounting node sub-network and a service node sub-network. The method includes: adding, after an accounting node generates a first data block, first key information used for verifying a block header of a second data block generated after the first data block to a block header of the first data block; generating a signature corresponding to the first data block, and adding the signature corresponding to the first data block to the block header of the first data block; and releasing the block header of the first data block to the service node sub-network, to cause a service node to verify the signature included in the block header of the first data block, and obtaining the first key information after a successful verification to verify the block header of the second data block.

Abstract: A multi-blockchain processing method includes receiving a first service request from a first service node, and invoking a first cross-chain reading contract on a first chain to read first service associated information from a target chain. The method further includes invoking, by a first consensus node, a first service processing contract to perform the first service and obtain service data as a first service execution result, and writing the first service execution result to the first chain. The method further includes reading, by the first consensus node, the service data from the first chain based on a second service indicated in a cross-chain reading request, and returning the service data to a second consensus node configured to write a second service execution result generated by the second service to the second chain after performing the second service based on the service data generated by the first service.

Abstract: A data processing method performed by a first device includes: generating, in response to first service data satisfying a data uploading condition, a first bit array corresponding to the first service data; encrypting the first bit array through a data key to obtain a ciphertext bit array, the data key being generated by a second device in a data intersection application run in a trusted execution environment of the second device; and transmitting the ciphertext bit array to a blockchain node for forwarding to a second device, for the second device to decrypt, in the data intersection application through the data key, the ciphertext bit array to obtain the first bit array.

Abstract: In a blockchain transaction execution method, a first transaction of a first blockchain is received from a proxy program component. The first transaction is based on a second transaction of a second blockchain. A data structure of the first transaction is different from a data structure of the second transaction. The second transaction is extracted from the first transaction. A virtual machine is invoked to execute the second transaction of the second blockchain. An execution result of the second transaction is transmitted to the application via the proxy program component.

Abstract: In a blockchain data processing method, service updating data of each of a plurality of encrypted data is received. The service updating data of each of the plurality of encrypted data includes encrypted primary key information of the respective encrypted data. Each of the plurality of encrypted data includes service data encrypted by a respective service node of a plurality of service nodes. Service intersection data is generated based on a data intersection of the service updating data of the plurality of encrypted data. The service intersection data is transmitted to a service node of the plurality of service nodes. The service intersection data includes supplemental text data from another service node of the plurality of service nodes.

Abstract: A blockchain-based data processing method, apparatus, and computer-readable medium are provided. Block proposal information is received including a block and a digital signature transmitted by an out-block node. The digital signature is obtained by performing digital signature processing on block header information included in the block. The block header information includes a first Merkel root determined based on transaction data in the block body information. Digest calculation on the block header information is performed to obtain first digest information. De-signature processing is performed on the digital signature to obtain second digest information. A second Merkel root is determined based on the transaction data acquired from the block proposal information when the first digest information and the second digest information are matched. An operation on the block is performed based on a comparison result of the first Merkel root and the second Merkel root.

Abstract: A blockchain-based data synchronization method, executed by a first service node, includes: acquiring target block data having a minimum block height that is greater than a first local block height, the first local block height being a maximum block height of local block data of the first service node before the first service node acquires the target block data; determining a block height of missing block data according to a block height of the target block data and the first local block height, the block height of the missing block data being less than the minimum block height of the target block data and greater than the first local block height; and requesting a target service node to synchronize the missing block data according to the block height of the missing block data.

Abstract: A data processing method includes: obtaining a plurality of groups of transaction data to be processed; determining, from the plurality of groups of transaction data according to transaction execution results of the plurality of groups of transaction data, at least one group of first transaction data that meets a preset execution condition; packaging the plurality of groups of transaction data, to generate a consensus-pending block, the consensus-pending block recording the at least group of first of first transaction data and at least one group of second transaction data, and the second transaction data being transaction data different from the first transaction data among the plurality of groups of transaction data; and performing first consensus processing on the first transaction data, and performing second consensus processing, different from the first consensus processing, on the second transaction data.

Abstract: A blockchain-based data processing method, device, and a computer-readable storage medium are provided. A first resource acquisition request of an object identification is transmitted for a target virtual resource to a blockchain network to make the blockchain network query a target ticket identification associated with the object identification and the target virtual resource based on the first resource acquisition request. Metadata is acquired having a binding relationship with the target ticket identification. The target ticket identification is used for characterizing that the object identification has ownership of the target virtual resource. The target virtual resource is acquired according to the metadata returned by the blockchain network. The target virtual resource is controlled to perform an interaction output in response to a triggering operation for interacting with the target virtual resource.