Abstract: Embodiments of this application disclose a blockchain key-based data processing method and apparatus. The method includes obtaining communication channels respectively communicating with N clients, and respectively performing key shard negotiation with the N clients to obtain a local private key shard and a complete public key; receiving signature requests transmitted by M?1 clients in the N clients, and obtaining identity association information in the M?1 signature requests; if the identity association information in the M?1 signature requests is legitimate identity information, determining a client that is in the M?1 clients as a target client, and obtaining service execution data associated with the target client; and if the service execution data conforms to a risk management policy corresponding to identity association information of the target client, jointly participating in joint signature processing on the blockchain service with the M?1 clients.

Abstract: Embodiments of this application provide a method for processing blockchain resources, including deploying a target resource package in the master contract in response to a deployment request of a first object for the target resource package; receiving a binding request of the first object for a plurality of target resources to be bound in the target resource package, a second owner of each target resource to be bound in a sub-contract corresponding to the target resource to be bound being already registered as the first object; changing the second owner from the first object to an address of the master contract in response to the binding request, to determine the target resource to be bound as a bound target resource; and changing a first owner of the bound target resource to a second object in response to an ownership transfer request of the second object for the bound target resource.

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: 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 data processing method based on a blockchain includes: receiving, by a first node device associated with a first blockchain, a cross-chain transaction request sent by a service terminal, invoking an on-chain service verification contract in the cross-chain transaction protocol, to verify whether the target cross-chain service is legal according to the service description information, to obtain a service verification result; invoking, in response to the service verification result indicating that the target cross-chain service is legal, an on-chain service execution contract in the cross-chain transaction protocol to execute the target cross-chain service, to obtain cross-chain transaction data; and sending the cross-chain transaction data to N cross-chain relay devices associated with the cross-chain transaction protocol.

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 data processing method and apparatus for a blockchain, a device, a medium, and a product, which are applicable to the field of blockchain technologies. The method includes: packaging a first object operation transaction submitted by a first service object and a second object operation transaction submitted by a second service object in a to-be-assembled transaction pool to obtain an initial on-chain transaction, both the second service object and the first service object being off-chain registered objects; performing on-chain signing processing on the initial on-chain transaction by using private key information of a service providing object, and constructing a target on-chain transaction based on on-chain transaction signature information and transaction parameters in the initial on-chain transaction; and transmitting, when the service providing object is an on-chain registered object, the target on-chain transaction to a consensus node associated with a blockchain.

Abstract: This disclosure relates to a method and device for processing cross-blockchain transactions. The method includes: acquiring a cross-blockchain transaction processing request from the source blockchain network by the first interface node, and distributing the cross-blockchain transaction processing request to the first number of relays; performing a first verification and a signature on the cross-blockchain transaction processing request by the relays to generate sub-signatures; generating a first signature of the relay system by the signature aggregation node after obtaining a second number of sub-signatures; and transmitting the cross-blockchain transaction processing request and the first signature to the target blockchain network.

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 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.