Blockchain system using state trie node and mining method thereof

Abstract

According to an embodiment, a mining method performed by node devices connected to a blockchain network, includes: acquiring, by a specific node device, a transaction including state change data for changing the state of a specific account and a first block including a first trie node related to specific state data of the blockchain network; generating, by the specific node device, a second block including a second trie node based on the transaction and the first trie node; and generating, by the specific node device, a nonce value for a second node corresponding to a state path from a specific leaf node corresponding to the specific account to a specific root node among one or more second nodes included in the second trie node, and determining whether a hash value derived based on the generated nonce value and the second node corresponding to the state path satisfies a predetermined criterion.