Cross-blockchain interaction systems

Abstract

One or more embodiments of the present specification provides cross-blockchain interaction systems. One system includes: one or more anchor devices, wherein at least one of the one or more anchor devices comprises a first client terminal associated with a first blockchain network, and wherein the first client terminal is configured to monitor cross-blockchain requests sent from the first blockchain network; and one or more relay devices, wherein at least one of the one or more relay devices comprises a second client terminal associated with a second blockchain network that monitors cross-blockchain requests intended for the second blockchain network.

1 - 20 . (canceled) 
     
     
         21 . A cross-blockchain interaction method, comprising:
 detecting, by one or more relay devices of a cross-chain interaction system, a cross-blockchain request sent from a first blockchain network;   initiating, by the one or more relay devices, a request to a second blockchain network in response to detecting the cross-blockchain request, wherein the one or more relay devices comprise a second client terminal associated with a second blockchain network that monitors cross-blockchain requests intended for the second blockchain network;   receiving, by the one or more relay devices, a response and a blockchain attestation sent from the second blockchain network;   verifying, by the one or more relay devices, the response based on the blockchain attestation;   converting, by the one or more relay devices, the blockchain attestation into a relay attestation using a trusted attestation conversion technology after the response is verified; and   sending, by the one or more relay devices, the response and the relay attestation to the first blockchain network.   
     
     
         22 . The cross-blockchain interaction method of  claim 21 , wherein detecting, by the one or more relay devices of the cross-chain interaction system, the cross-blockchain request sent from the first blockchain network comprises:
 detecting, by the one or more relay devices of the cross-chain interaction system, the cross-blockchain request sent from the first blockchain network through one or more anchor devices, wherein the one or more anchor devices comprises a first client terminal associated with the first blockchain network, and wherein the first client terminal is configured to monitor cross-blockchain requests sent from the first blockchain network.   
     
     
         23 . The cross-blockchain interaction method of  claim 21 , wherein the one or more relay devices comprises a plurality of relay devices and wherein two or more relay devices in the plurality of relay devices generate relay attestations based on different trusted attestation conversion technologies. 
     
     
         24 . The cross-blockchain interaction method of  claim 22 , wherein detecting, by the one or more relay devices of the cross-chain interaction system, the cross-blockchain request sent from the first blockchain network comprises:
 detecting, by the one or more relay devices of the cross-chain interaction system, the cross-blockchain request sent from the first blockchain network through the one or more anchor devices.   
     
     
         25 . The cross-blockchain interaction method of  claim 22 , wherein detecting, by the one or more relay devices of the cross-chain interaction system, the cross-blockchain request sent from the first blockchain network comprises:
 detecting, by the one or more relay devices of the cross-chain interaction system, the cross-blockchain request sent from the first blockchain network through the one or more anchor devices and a bridge device connecting the one or more anchor devices and the one or more relay devices.   
     
     
         26 . The cross-blockchain interaction method of  claim 25 , wherein the bridge device comprises at least one private bridge device for cross-blockchain communications between the first blockchain network and the second blockchain network. 
     
     
         27 . The cross-blockchain interaction method of  claim 25 , wherein the bridge device is coupled to and in two-way communication with the one or more anchor devices and the one or more relay devices. 
     
     
         28 . The cross-blockchain interaction method of  claim 22 , wherein the first client terminal is configured to perform simplified payment verification (SPV) on a first blockchain associated with the first blockchain network, and the at least one of the one or more relay devices is configured to perform SPV on a second blockchain associated with second blockchain network. 
     
     
         29 . The cross-blockchain interaction method of  claim 21 , wherein the trusted attestation conversion technology comprises one or more of a trusted execution environment (TEE) technology, a proof of authority (POA) technology, a secure multi-party computation technology, or a zero-knowledge proof (ZKP) technology. 
     
     
         30 . The cross-blockchain interaction method of  claim 21 , wherein a root of trust of the one or more relay devices is pre-recorded on a blockchain to be used by blockchain nodes of the first blockchain network to verify the response and the relay attestation. 
     
     
         31 . A cross-blockchain interaction system, comprising:
 one or more relay devices, wherein at least one of the one or more relay devices comprises a client terminal associated with a second blockchain network that monitors cross-blockchain requests intended for the second blockchain network, wherein the at least one of the one or more relay devices is configured to perform operations comprising:   receiving, by the one or more relay devices, a response and a blockchain attestation sent from a first blockchain network;   verifying, by the one or more relay devices, the response based on the blockchain attestation;   converting, by the one or more relay devices, the blockchain attestation into a relay attestation using a trusted attestation conversion technology after the response is verified; and   sending, by the one or more relay devices, the response and the relay attestation to the first blockchain network.   
     
     
         32 . The cross-blockchain interaction system of  claim 31 , wherein detecting, by the one or more relay devices of the cross-chain interaction system, the cross-blockchain request sent from the first blockchain network comprises:
 detecting, by the one or more relay devices of the cross-chain interaction system, the cross-blockchain request sent from the first blockchain network through one or more anchor devices, wherein the one or more anchor devices comprises a first client terminal associated with the first blockchain network, and wherein the first client terminal is configured to monitor cross-blockchain requests sent from the first blockchain network.   
     
     
         33 . The cross-blockchain interaction system of  claim 31 , wherein the one or more relay devices comprise a plurality of relay devices and wherein two or more relay devices in the plurality of relay devices generate relay attestations based on different trusted attestation conversion technologies. 
     
     
         34 . The cross-blockchain interaction system of  claim 32 , wherein detecting, by the one or more relay devices of the cross-chain interaction system, the cross-blockchain request sent from the first blockchain network comprises:
 detecting, by the one or more relay devices of the cross-chain interaction system, the cross-blockchain request sent from the first blockchain network through the one or more anchor devices.   
     
     
         35 . The cross-blockchain interaction system of  claim 32 , wherein detecting, by the one or more relay devices of the cross-chain interaction system, the cross-blockchain request sent from the first blockchain network comprises:
 detecting, by the one or more relay devices of the cross-chain interaction system, the cross-blockchain request sent from the first blockchain network through the one or more anchor devices and a bridge device connecting the one or more anchor devices and the one or more relay devices.   
     
     
         36 . The cross-blockchain interaction system of  claim 35 , wherein the bridge device is coupled to and in two-way communication with the one or more anchor devices and the one or more relay devices. 
     
     
         37 . The cross-blockchain interaction system of  claim 32 , wherein the first client terminal is configured to perform simplified payment verification (SPV) on a first blockchain associated with the first blockchain network, and the at least one of the one or more relay devices is configured to perform SPV on a second blockchain associated with second blockchain network. 
     
     
         38 . The cross-blockchain interaction system of  claim 31 , wherein the trusted attestation conversion technology comprises one or more of a trusted execution environment (TEE) technology, a proof of authority (POA) technology, a secure multi-party computation technology, or a zero-knowledge proof (ZKP) technology. 
     
     
         39 . The cross-blockchain interaction system of  claim 31 , wherein a root of trust of the one or more relay devices is pre-recorded on a blockchain to be used by blockchain nodes of the first blockchain network to verify the response and the relay attestation. 
     
     
         40 . A non-transitory, computer-readable medium storing one or more instructions executable by a computer system to perform operations comprising:
 detecting, by one or more relay devices of a cross-chain interaction system, a cross-blockchain request sent from a first blockchain network;   initiating, by the one or more relay devices, a request to a second blockchain network in response to detecting the cross-blockchain request, wherein the one or more relay devices comprise a second client terminal associated with a second blockchain network that monitors cross-blockchain requests intended for the second blockchain network;   receiving, by the one or more relay devices, a response and a blockchain attestation sent from the second blockchain network;   verifying, by the one or more relay devices, the response based on the blockchain attestation;   converting, by the one or more relay devices, the blockchain attestation into a relay attestation using a trusted attestation conversion technology after the response is verified; and sending, by the one or more relay devices, the response and the relay attestation to the first blockchain network.