Cross-chain relay method and device and computer readable storage medium

The invention relates to the technical field of blockchain security, in particular to a cross-chain relay method and device and a computer readable storage medium. The method provided by the inventioncomprises the following steps: a verifier node loads information of a main chain and a side chain; and cross-chain communication data between the main chain and the side chain is transmitted according to the information of the main chain and the side chain, and the verifier node is taken as a relay node to realize a relay function. By means of the embodiment, whether the verifier node serving asthe relay node is available or not can be judged in a combined and crossed mode through the two time threshold values, and the reliability of cross-chain communication data transmission between the main chain and the side chain is improved. On the premise of not introducing a relay chain of a third party, the verifier node is used as the relay node to realize a relay function, so that the securityof cross-chain communicati