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 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 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: Aspects of the disclosure provide a method for displaying blockchain data, a blockchain browser, a user node, and a medium. The method can include transmitting a blockchain data query request, and receiving blockchain data obtained through query in response to the blockchain data query request. Further, the method can include obtaining filtered blockchain data, the filtered blockchain data being generated after illegal content in the blockchain data is filtered out based on a filtering rule, and displaying the filtered blockchain data. In embodiments of this disclosure, the display of the illegal content in the blockchain data can be automatically skipped.

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 method for electing a representative node device is performed at a blockchain system, including: obtaining voting transaction data from the node devices, the voting transaction data being used for voting for one or more node devices of the blockchain system as representative node devices; generating and storing the voting transaction data into a target blockchain of the blockchain system when a plurality of node devices of the blockchain system verify the voting transaction data by consensus; and when a quantity of blocks in the target blockchain generated using the voting transaction data reaches a preset quantity, determining an election result according to quantities of votes of the node devices determined from the voting transaction data, the election result identifying a plurality of representative node devices in the blockchain system being configured to generate new blocks for the target blockchain and perform verification on the new blocks by consensus.

Abstract: A blockchain-based data snapshot method, performed by a consensus node in a blockchain network, includes: obtaining a snapshot trigger instruction and a trigger moment of the snapshot trigger instruction; performing snapshot processing on one or more transaction blocks in a ledger at the trigger moment, to obtain a snapshot account state of a transaction account, the snapshot account state being account data related to transaction data in the transaction blocks; obtaining a write-ahead logging (WAL) log of a target block, the target block being a block with a highest block height in the transaction blocks, the WAL log including a log of account data corresponding to the target block; and correcting dirty data in the snapshot account state according to the WAL log, to obtain a corrected snapshot account state, the dirty data being generated based on incomplete transaction data in the target block included in the ledger.

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 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: detecting, when writing first block data into a local cache and a local storage, a first block processing space of a storage buffer pool; writing, when a number of block data to be stored does not reach a buffer block processing threshold, the first block data into the storage buffer pool based on N block data to be stored; detecting a second block processing space of a storage processing pool; and determining, when a number of block data to be fed back does not reach a feedback block processing threshold, block data to be merged for overlap detection with the block data to be fed back in the storage buffer pool based on the number of the block data to be fed back and the feedback block processing threshold, and writing the data retained after overlap detection to a distributed database.

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: Embodiments of this disclosure disclose a data processing method and apparatus, a device, and a storage medium. The method includes: after receiving a block synchronization request carrying a target block height transmitted by a first service node, transmitting a compact block identification and the block synchronization request to a consensus node; the compact block identification being used for instructing the consensus node to determine structural information of a compact block corresponding to a block to be synchronized; searching for a local transaction identifier matching a target transaction identifier in a first relay cache; and in the first relay cache, taking local transaction data corresponding to the found local transaction identifier as first key transaction data, and performing data clearing on the first key transaction data successfully synchronized to the first service node.

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.

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: A data processing method includes: determining, in response to a request of an access terminal for writing target data to a blockchain, a target node role with a read permission for the target data, an access terminal connected with each node device having a permission of a node role corresponding to the node device; acquiring an encryption key corresponding to the target node role; performing encryption processing on the target data according to the encryption key to obtain a cipher text corresponding to the target data, the cipher text corresponding to the target data being decryptable for an access terminal corresponding to the target node role; and storing the cipher text corresponding to the target data to the blockchain.

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: Data routing with a forwarding process of service data can avoid problems of offline nodes. The forwarding process for data routing can also improve the fault tolerance and service data can be quickly transmitted to a corresponding data pool. Using consensus nodes and a target data pool with routing and forwarding tables along with subtrees from a trie tree can improve the routing. Subtrees may be obtained by splitting the trie tree from a root node by using a first leaf node as a benchmark, which correspondingly represents a data pool of the consensus node. The routing and forwarding table is configured to record addresses of data pools correspondingly represented by a preset quantity of leaf nodes in a corresponding subtree.

Abstract: A blockchain-based data snapshot method, performed by a consensus node in a blockchain network, includes: obtaining a snapshot trigger instruction and a trigger moment of the snapshot trigger instruction; performing snapshot processing on one or more transaction blocks in a ledger at the trigger moment, to obtain a snapshot account state of a transaction account, the snapshot account state being account data related to transaction data in the transaction blocks; obtaining a write-ahead logging (WAL) log of a target block, the target block being a block with a highest block height in the transaction blocks, the WAL log including a log of account data corresponding to the target block; and correcting dirty data in the snapshot account state according to the WAL log, to obtain a corrected snapshot account state, the dirty data being generated based on incomplete transaction data in the target block included in the ledger.

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.