Abstract: A data processing method includes: transmitting, by a first service node, service data information to a second service node, so that the second service node obtains data signature information; a first key parameter and a second key parameter that are both related to a random parameter; the random parameter being determined by the second service node based on a node private key and the service data information; performing signature verification on the received data signature information based on the first key parameter and the second key parameter, and adding a signature verification result obtained after signature verification to a verification result set; searching for a target signature verification result that satisfies a valid verification condition from the verification result set; and performing aggregate signature on the data signature information obtained after calculation when a quantity of signatures of the target signature verification result satisfies an aggregate signature condition.

Abstract: Embodiments of the present application provide a data processing method based on a blockchain network and a related product. The method includes obtaining the check block from the service node in the witness network; determining a data recovery reference matrix based on a coding matrix and the check block obtained from the service node in the witness network; and recovering the target block based on the data recovery reference matrix and the check block obtained from the service node in the witness network. The target block is a block on a blockchain maintained by the consensus node in the consensus network. The check block of the target block stored by the service node is obtained by the service node when synchronizing related block data of the target block from the consensus node in the consensus network and the check block is configured for recovering the target block.

Abstract: A blockchain-based data processing method includes: assigning, in response to that a first request message with a sequence number n has a first prepared certificate, a sequence number n+1 to a second request message; associatively storing the first request message and a first response result corresponding to the first request message in response to that the second request message has a second prepared certificate; performing in parallel a request operation corresponding to the second request message while associatively storing the first request message and the first response result, to obtain a second response result corresponding to the second request message; and returning, to a client, a first initial response message generated based on the second response result, for the client to determine a first request execution result corresponding to the second request message based on the first initial response message and a backup initial response message.

Abstract: This application provides a data processing method, a computer device, and a medium. The method is applied to a terminal device including a first client. The first client has a public client key and a private client key. The first client stores encrypted data that is obtained by encrypting the private client key according to an object password. The method includes receiving the object password; decrypting the encrypted data by using the received object password to obtain the private client key; signing the encrypted data based on the private client key to obtain a signature of the encrypted data; and transmitting the public client key, the encrypted data, and the signature of the encrypted data to a cloud device of the first client, the cloud device storing the encrypted data after verifying the encrypted data based on the public client key and the signature of the encrypted data.

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: 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: Block-chain-based data processing method includes acquiring, by a transaction processing node, transaction data for validation, and performing validation processing on the transaction data to obtain a validation processing result; in response to the validation processing result of the transaction data for validation being a validated-as-valid result, adding the transaction data to a transaction pool; in response to a transaction packing request transmitted by a block processing node being received, acquiring at least one transaction data from the transaction pool according to the transaction packing request, hardware device resources of the transaction processing node and the block processing node being independent from each other; and performing packing processing on the at least one transaction data to obtain a transaction data packet, and transmitting the transaction data packet to the block processing node to generate a proposed block according to the at least one transaction data in the transaction data

Abstract: A data processing method is performed by a computer device acting as a target consensus node in a core consensus network, and includes: receiving a transaction and a target chain identifier transmitted by a service node, the target chain identifier belonging to M chain identifiers configured for the service node; performing packing processing on the transaction based on a derivation condition corresponding to the target chain identifier to obtain a to-be-verified block, and transmitting the to-be-verified block to at least a part of consensus nodes in the core consensus network except the target consensus node based on the target chain identifier; and receiving a first block consensus result returned by the consensus node, and writing, when the first block consensus result indicates that consensus succeeds, the to-be-verified block to a service branch chain corresponding to the target chain identifier.

Abstract: A method of contract-based data processing includes obtaining, by an electronic device at a service node in a service network, an initial contract invocation request for executing a transaction service. The initial contract invocation request includes a first contract identifier of a target chain contract on a consensus node in a core consensus network. The method further includes determining, according to the first contract identifier, a target local contract that is deployed at the service node and is associated with the target chain contract deployed at the consensus node, invoking the target local contract that executes a local service associated with the transaction service to obtain a local transaction execution result, and transmitting a target contract invocation request to the consensus node based on the local transaction execution result and the initial contract invocation request. The target contract invocation request causes the consensus node to invoke the target chain contract.

Abstract: A data processing method and apparatus based on a node internal memory, a device and a computer readable storage medium are provided. The method includes: acquiring a data reading contract associated with a transaction in a first block from a chain reading cache of the node internal memory; invoking the data reading contract to acquire a write cache mapping table associated with the first block, and determining target read data associated with the transaction based on a first block cache of the first block in the write cache mapping table; and executing the transaction based on the target read data, storing target cached data, corresponding to a result of executing of the transaction, to the first block cache, and writing the first block into a bifurcated blockchain.

Abstract: A data processing method includes: transmitting, by a first service node, service data information to a second service node, so that the second service node obtains data signature information; a first key parameter and a second key parameter that are both related to a random parameter; the random parameter being determined by the second service node based on a node private key and the service data information; performing signature verification on the received data signature information based on the first key parameter and the second key parameter, and adding a signature verification result obtained after signature verification to a verification result set; searching for a target signature verification result that satisfies a valid verification condition from the verification result set; and performing aggregate signature on the data signature information obtained after calculation when a quantity of signatures of the target signature verification result satisfies an aggregate signature condition.

Abstract: Embodiments of this application provide a data communication method performed by a computer device.

Abstract: In a block chain-based block consensus method, a proposal block generated in an Nth round with a block height of M is acquired, and validity verification is performed on the proposal block. An application is executed based on transaction data in the proposal block to obtain a target execution result. A block hash of the proposal block and the target execution result are stored in a memory, including N execution results with the block height of M. While the application is executed based on the transaction data, two rounds of consensus voting processing are performed on the proposal block to obtain a first consensus result. Based on the first consensus result being a consensus pass result, the target execution result mapped by the block hash of the proposal block in the memory is acquired, and the proposal block and the target execution result are stored to a block chain.