Abstract: Implementations of the present specification include receiving a request to perform a private transaction associated with at least one account; in response to receiving the request, performing, by a workflow node, the private transaction; in response to performing the private transaction, generating, by the workflow node, a representation of the private transaction configured to be accessible only to entities that are authorized to access the private transaction; storing, in a private blockchain, the representation of the private transaction; generating, by the workflow node, an account record for the at least one account associated with the private transaction based at least in part on the private transaction, wherein the account record is configured to be accessible to at least one entity that is not authorized to access the representation of the private transaction in the private blockchain; and storing, in a public blockchain, the account record.

Abstract: Implementations of the present specification include receiving, from a client in a blockchain network, a request to execute a workflow program, wherein the workflow program is stored in a blockchain maintained by the blockchain network; identifying an operation associated with the workflow program; assigning the identified operation to a subset of the plurality of nodes in the blockchain network, wherein each node is configured to execute the operation separately from the other nodes in the subset of nodes; identifying processing results for the executed operation associated with nodes in the subset of nodes, each processing result associated with a particular node from the subset and representing a result of the executed operation produced by the particular node; and determining a consensus result for the operation based on the identified processing results associated with a number of nodes greater than or equal to a consensus threshold matching the consensus result.