Method, device and computer-readable storage medium for data transfer and circulation

A data transfer and circulation device, comprising:

• a first obtaining module;
• a first sending module;
• a second sending module;
• a second obtaining module;
• a first processing module;
• and
• a second processing module;
• wherein the first obtaining module is configured for obtaining blockchain certificates respectively corresponding to multi-level supplier nodes;
• the first sending module is configured for sending the blockchain certificates to a core enterprise node, wherein the blockchain certificates are configured to trigger the core enterprise node to confirm user identities of the multi-level supplier nodes;
• the second sending module is configured for allowing a first-level supplier node among the multi-level supplier nodes to send a request for a completed work item to the core enterprise node after receiving a confirmation feedback of the user identities of the multi-level supplier nodes sent from the core enterprise node;
• the second obtaining module is configured for obtaining a completed work item of the first-level supplier node, and generating a completed work item digital bill of the first-level supplier node based on a preset smart contract and the completed work item of the first-level supplier node;
• the first processing module is configured for performing one or more transfers among the multi-level supplier nodes according to the completed work item digital bill, and generating credit transfer digital certificates respectively corresponding to different levels of the multi-level supplier nodes based on the preset smart contract during a transfer process;
• and
• the second processing module is configured for allowing the multi-level supplier nodes to request factoring information from a factor node based on the credit transfer digital certificates.