BIG DATA TRANSACTION METHOD AND APPARATUS BASED ON BLOCKCHAIN, AND MEDIUM AND DEVICE

摘要

The present application relates to the technical field of blockchains. Provided are a big data transaction method and apparatus based on a blockchain, and a medium and a device. The method comprises: a computing party, a data party and a model party, which participate in a transaction, writing respective transaction data into a blockchain network, so as to perform an on-chain operation, and identifying respective feature types in the blockchain network; the computing party, the data party and the model party, which participate in the transaction, performing transaction broadcasting on respective nodes on a blockchain; starting a data task, and selecting the model party and the calculation party to perform model training; obtaining a training result that is based on the data of the data party, is calculated by the calculation party and is trained by a model of the model party; and performing a transaction according to the training result. By means of the big data transaction method based on a blockchain in the present application, a computing party, a data party and a model party can easily find a target object for cooperation, and can realize a customized selection by broadcasting their own historical data.