SYSTEM AND METHOD FOR INTEROPERABILITY OF BLOCKCHAINS

• US 20190317936A1
• Filed: 06/28/2019
• Published: 10/17/2019
• Est. Priority Date: 11/09/2018
• Status: Active Grant

• Current Assignee: Innoplexus AG
• Original Assignee: Innoplexus AG
• Inventors: Keskar, Abhijit
• Granted Patent: US 10,642,825 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 16/1734 Details of monitoring file system events, e.g. by the use of hooks, filter drivers, logs
• CPC Class Codes: G06F 16/183 Provision of network file services by network file servers, e.g. by using NFS, CIFS network file access protocols H04L67/1097
• CPC Class Codes: G06F 16/2379 Updates performed during online database operations; commit processing
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload
• CPC Class Codes: H04L 63/0442 wherein the sending and receiving network entities apply asymmetric encryption, i.e. different keys for encryption and decryption cryptographic mechanisms or cryptographic arrangements for public-key encryption H04L9/30
• CPC Class Codes: H04L 9/0637 Modes of operation, e.g. cipher block chaining [CBC], electronic codebook [ECB] or Galois/counter mode [GCM]
• CPC Class Codes: H04L 9/0643 Hash functions, e.g. MD5, SHA, HMAC or f9 MAC
• CPC Class Codes: H04L 9/0891 Revocation or update of secret information, e.g. encryption key update or rekeying
• CPC Class Codes: H04L 9/0894 Escrow, recovery or storing of secret information, e.g. secret key escrow or cryptographic key storage
• CPC Class Codes: H04L 9/3239 involving non-keyed hash functions, e.g. modification detection codes [MDCs], MD5, SHA or RIPEMD
• CPC Class Codes: H04L 9/50 using hash chains, e.g. blockchains or hash trees

Abstract

Disclosed herein is a system and method for interoperability of blockchains thereby allowing use of smart contracts across blockchains in real time and in a secured manner. A plurality of blockchains are connected to each other and allow use of smart contracts written on them by other connected blockchains without the need of rewriting and/or downloading the smart contract on other blockchain. The disclosed system and methods use a distributed file system storage for secured processing of information flowing from one blockchain to other connected blockchain. Further, each connected blockchain is associated with distinct private and public key in order to encrypt and decrypt the data flowing across blockchains.

Claims

1. A system for interoperability amongst a plurality of blockchains communicably coupled to a distributed file system storage and a server arrangement, wherein the server arrangement is configured to:

append a first transaction to a host blockchain amongst the plurality of blockchains, the first transaction comprising a method name and one or more parameters, wherein the host blockchain is operable to;

defer an execution of the first transaction for a predetermined time;

store the method name and the one or more parameters on the distributed file storage system;

receive a first address hash and the method name from the host blockchain wherein the first address hash is indicative of a first storage location for the method name ,and the one or more parameters on the distributed file storage system;

identify a non-host blockchain amongst the plurality of blockchains;

append a second transaction to the non-host blockchain, the second transaction comprising the first hash address;

receive a second hash address from the non-host blockchain wherein the second hash address is indicative of a second storage location on the distributed file storage system, the second storage location configured to store a method output from an execution of a smart contract method, on the non-host blockchain, corresponding to the method name;

append a third transaction, to the host blockchain, the third transaction comprising the second hash address;

receive, consequent to the execution of the first transaction at the end of the predetermined period, a final output of the first transaction on the host blockchain wherein the final output is indicative of the method output of the smart contract method.

2. The system of claim 1 wherein the each of the host blockchain and the non-host blockchain comprises a initial smart contract, the initial smart contract further comprising one or more standard method calls for a communication with the distributed file storage system.

3. The system of claim 2 wherein the initial smart contract further comprises a data structure repository configured to maintain a list of one or more transactions along with the execution status of the one or more transactions.

4. The system of claim 1 wherein each of the host blockchain and the non-host blockchain is configured to encrypt the communication with the distributed file storage system.

5. The system of claim 4 wherein each of the host blockchain and the non-host blockchain is assigned with a private key and a public key.

6. The system of claim 1 wherein the server arrangement is further configured to identify a non-host blockchain based on a method index, the method index comprising a list of one or more method names mapped against the at least one of the plurality of blockchains.

7. The system of claim 1 wherein the predetermined time is based on an execution time of the smart contract method on the non-host blockchain.

8. A system for interoperability of a plurality of blockchains communicably coupled to a distributed file system storage and a server arrangement, the system comprising a host blockchain configured to:

receive a first transaction for execution of a smart contract method, the transaction comprising a method name corresponding to the smart contract method and one or more parameters;

encrypt and transmit to the distributed file storage system, the method name and the one or more parameters;

defer the transaction for a predetermined time;

identify, amongst the plurality of blockchains, a non-host blockchain deployed with the smart contract method;

receive a second hash address;

decrypt and read from the distributed file storage system, a method output from an execution of the smart contract method on the non-host blockchain;

execute the first transaction and store a final output pertaining to the first transaction.

9. The system of claim 8, wherein the second hash address is indicative of a second storage location on the distributed file storage system, the second storage location configured to store a method output from an execution of a smart contract method, on the non-host blockchain, corresponding to the method name;

10. A method for executing a dynamic smart contract on a host blockchain, wherein the dynamic smart contract comprises one or more smart contract methods to be processed in a sequence of execution, the one or more smart contract methods deployed across a plurality of blockchains, separate from the host blockchain, the method comprising the steps of:

a) accepting a smart contract method amongst the one or more smart contract methods of the dynamic smart contract for processing as per the sequence of execution;

b) determining an availability of the smart contract method on the host blockchain;

c) deferring an execution of the dynamic smart contract on the host blockchain for a predetermined period, based on the determination of the unavailability of the smart contract method on the host blockchain;

d) identifying a non-host blockchain deployed with the first smart contract method;

e) receiving a method output from the first smart contract method executed on the non-host blockchain;

f) resuming the execution of the dynamic smart contract method;

g) looping to step (a) until a last smart contract method of the one or more smart contract methods of the dynamic smart contract is processed as per the sequence of execution.

11. The method of claim 10, wherein identifying the non-host blockchain is based on a method index, the method index comprising a list of one or more method names mapped against the at least one of the plurality of blockchains.