Acquisition transaction method and device based on block chain network, and identity authentication device

A block chain network-based acquisition transaction method and device relate to the field of block chain application, can be applied to the financial field and other fields, and comprise the following steps: through a block chain network, obtaining public key information generated by a first user and a second user through an ECDH key exchange algorithm, obtaining identity verification results of the first user and the second user according to a comparison result of the public key information; sorting the transaction requests submitted by the first user or the second user through an Order node in the block chain network according to the identity verification result to generate sorting information; obtaining a pre-stored commission rule according to a service scene corresponding to the transaction request, and processing the transaction request through a Peer node in the block chain network according to the commission rule to obtain corresponding entry data and commission data; and performing corresponding rece