Cross-chain communication method and device for block chain in field of supply chains

Abstract

The invention discloses a cross-chain communication method and device for a block chain in the field of supply chains. The method comprises the steps that after a first invoice information acquisitionrequest which is sent by a first financing institution and comprises an identifier of a to-be-inquired invoice is received, a second invoice information acquisition request is sent to an invoice alliance block chain according to a preset cross-chain inquiry contract, and the second invoice information acquisition request comprises the identifier of the to-be-inquired invoice and an identifier ofa connection block chain; and a second invoice information acquisition response which is sent by the invoice alliance block chain according to the identifier of the connection block chain and the identifier of the invoice to be inquired and comprises the invoice information of the invoice to be inquired is received, and a first invoice information acquisition response comprising the invoice information is sent to the first financing institution according to a preset cross-chain inquiry contract. Visibly, according to the method, the plurality of alliance block chains are connected through theconnection block chain, so that information transmission among the alliance block chains is realized, namely, cross-chain communication among the alliance block chains is realized, and the invoice information query accuracy is improved.

Description

technical field [0001] The present application relates to the field of blockchain communication, in particular to a method and device for cross-chain communication of blockchain in the field of supply chain. Background technique [0002] The generation of the alliance blockchain can be understood from the groups used by the alliance chain. Their main groups are banks, insurance, securities, business associations, group companies and upstream and downstream enterprises. [0003] The essence of supply chain finance is to use the bonds and property rights between enterprises in the supply chain for financing. When financial institutions carry out supply chain financial business, they need to review the authenticity of trade. As a voucher for transactions between enterprises, invoices have important reference value in defining the authenticity of trade. In order to prevent enterprises from using the same invoice for different financing projects, the immutable and traceable blo...

AI Technical Summary

Problems solved by technology

[0004] However, the current alliance blockchains established among various industries tend to be independent, that is to say, for the validity of invoices, each alliance blockchain in the supply chain needs to be verified by a trusted third party such as the tax bureau; The financing validity of invoices, each consortium blockchain in the supply chain can only be verified within this consortium blockchain

It can be seen that in the above supply chain, the information interconnection between multiple alliance blockchains cannot be realized, and the invoice information of invoices in other alliance blockchains cannot be queried, resulting in inaccurate invoice information.

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