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-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.

Abstract: Embodiments of this application provide a synchronization processing method, apparatus, and device, and a medium. The method includes obtaining a skeleton set and a synchronization task set, the skeleton set being used for storing M blocks to be synchronized by the first node device, the skeleton set comprising P skeletons, the synchronization task set comprising P synchronization tasks, the P skeletons being of a one-to-one correspondence to the P synchronization tasks, and M and P both being positive integers; selecting a second node device from the candidate node set, the second node device being a candidate node device in the candidate node set; concurrently transmitting synchronization tasks in the synchronization task set to the second node device, the second node device performing the synchronization tasks and returning the M blocks; and filling the M blocks into the skeletons in the skeleton set.

Abstract: This application discloses a method and apparatus for processing data based on a block chain. The method includes adding transaction data in at least two blocks into an execution queue according to a block height sequence and transaction data sequence numbers; executing contract services and acquiring a read cache and a write cache of a parallel transaction generated by executing each contract service, the at least two pieces of transaction data comprising target transaction data; determining a write cache of a merged transaction in block caches, and acquiring a read cache of an updated transaction; determining a write cache of the transaction to be merged of the target transaction data according to the read cache of the updated transaction; and merging the write cache of the transaction to be merged of the target transaction data into a block cache to which the target transaction data belongs.

Abstract: This application discloses a key generation method and apparatus, a device, and a medium. The method includes transmitting a key negotiation request to a consensus node in a blockchain network, to request a key verification parameter; negotiating a collaboration key pair with a second device to obtain a first private key component and a shared public key in the collaboration key pair; signing the key verification parameter by using the first private key component, to obtain a first signature component; generating transaction data according to the first signature component and the key verification parameter; transmitting the transaction data to the second device. The consensus node performs a consensus on the negotiation result data, and after the negotiation result data passes the consensus, submits the negotiation result data to a blockchain of the blockchain network.

Abstract: A data processing method for blockchain technology verifies transactions. Transaction operations on a blockchain are more consistent and the accuracy of transaction data on the blockchain is improved. A first transaction operation corresponding to a first transaction request on the blockchain, and a second transaction operation corresponding to a second transaction request on the blockchain are both performed. When an operation result corresponding to either the first transaction operation and/or the second transaction operation is a failure, then the processing on a transaction operation can be rolled back to a successful operation.

Abstract: A method for electing a representative node device for a blockchain system includes: receiving IP address information of a first node device, the first node device being in a candidate state for a representative node device; receiving, from the first node device, an IP address obtaining request for requesting IP address information of a representative node device; when the first node device is determined to be a representative node device of the blockchain system elected in a current election process, transmitting, to the first node device, an IP address list comprising IP address information of representative node devices elected in the current election process; and when the first node device is determined not to be a representative node device of the blockchain system elected in the current election process, skipping the IP address obtaining request.

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: 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 information processing method in digital asset certificate inheritance transfer, and a related apparatus. The method includes: obtaining a will of a user; and triggering, in response to that a signature made on the will by using a public key of the authoritative entity node is successfully verified by using a private key of the authoritative entity node, transmission of a signature made on at least one digital asset certificate in the will by using a public key of a corresponding inheritor personal security kernel node to the inheritor personal security kernel node corresponding to each inheritor personal security kernel node identifier in the will. In the embodiments of this application, the digital asset certificates of the user are uniformly maintained.

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: Embodiments of this disclosure disclose a block processing method, a node, and a system, to improve the speed of block generation and the performance of transaction processing.

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 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: Disclosed is a data synchronization method performed by a computer device, the method including: receiving a piece of transaction data, the piece of transaction data carrying an update operation identifier and a predefined phrase corresponding to the update operation identifier; obtaining, in a case that a target block including the piece of transaction data is stored into a blockchain of a blockchain system, the update operation identifier and the predefined phrase in the target block; and updating a predefined phrase database according to the update operation identifier and the predefined phrase in the target block.

Abstract: A method for transferring a credit rights certificate is provided, including: generating a target account address according to a debtor account address and a creditor account address in a credit rights certificate transfer request, the target account address being a temporary account address used for storing a credit rights certificate and based on a multi-digital-signature process; transferring a credit rights certificate corresponding to the credit rights certificate transfer request from the debtor account address to the target account address; and transferring the credit rights certificate from the target account address to the creditor account address based on a confirmation instruction from the creditor account address.

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.