Patent attributes
Implementations of the present specification provide a method for updating a state Merkle tree, where the state Merkle tree is used to store a state of an account in a blockchain network. The method includes: accessing data related to a state Merkle tree that stores a state of an account in a blockchain network; determining to-be-updated nodes that need to be updated in the state Merkle tree due to a state change of the account; extracting one first subtree and M second subtrees from the state Merkle tree based on the to-be-updated nodes; allocating the M second subtrees to N worker threads, wherein two or more of the N worker threads process in parallel the M second subtrees to obtain each updated second subtree; and updating at least the first subtree based on hash values of root nodes of the updated second subtrees, to obtain an updated state Merkle tree.
