Blockchain system and data storage method and apparatus

1. A method for storing data, comprising:

receiving, by one or more computing devices, a transaction request from a first node, the transaction request comprising transaction data;

determining, by the one or more computing devices based on the transaction data, a blockchain network corresponding to the transaction request from a plurality of blockchain networks connected to the one or more computing devices, wherein the first node is excluded from a consensus process associated with the determined blockchain network;

forwarding, by the one or more computing devices, the transaction request to the determined blockchain network;

receiving, by the one or more computing devices from the determined blockchain network, a block generated based on consensus validation on the transaction request; and

forwarding, by the one or more computing devices, the block to the first node.

2. The method of claim 1 , further comprising:

performing, by the determined blockchain network, the consensus validation on the transaction request forwarded by the one or more computing devices;

generating, by the determined blockchain network, the block associated with the transaction request; and

adding, by the determined blockchain network, the generated block to a blockchain associated with the determined blockchain network.

3. The method of claim 1 , further comprising:

storing, by the first node, information associated with the block to a public blockchain.

4. The method of claim 1 , further comprising:

receiving, by the one or more computing devices, a transaction digest corresponding to the block from the determined blockchain network; and

forwarding, by the one or more computing devices, the transaction digest to the first node.

5. The method of claim 4 , further comprising:

storing, by the first node, information associated with the transaction digest to a public blockchain.

6. The method of claim 1 , further comprising:

receiving, by the one or more computing devices, a search request for transaction data from the first node;

determining, by the one or more computing devices, a search permission associated with the first node based on the search request;

obtaining, by the one or more computing devices from the determined blockchain network, transaction data corresponding to the search permission; and

sending, by the one or more computing devices, the obtained transaction data to the first node.

7. The method of claim 6 , wherein the determining a search permission associated with the first node comprises:

determining a type of the first node; and

assigning the search permission to the first node based on the determined type.

8. A system for storing data, comprising a processor and a non-transitory computer-readable storage medium storing instructions executable by the processor to cause the system to perform operations comprising:

receiving a transaction request from a first node, the transaction request comprising transaction data;

determining, based on the transaction data, a blockchain network corresponding to the transaction request from a plurality of blockchain networks connected to the one or more computing devices, wherein the first node is excluded from a consensus process associated with the determined blockchain network;

forwarding the transaction request to the determined blockchain network;

receiving, from the determined blockchain network, a block generated based on consensus validation on the transaction request; and

forwarding the block to the first node.

9. The system of claim 8 , wherein the operations further comprise:

validating, by a node associated with the determined blockchain network, the transaction request forwarded by the one or more computing devices;

generating, by the node associated with the determined blockchain network, the block associated with the transaction request; and

adding, by the node associated with the determined blockchain network, the generated block to a blockchain associated with the determined blockchain network.

10. The system of claim 8 , wherein the operations further comprise:

storing, by the first node, information associated with the block to a public blockchain.

11. The system of claim 8 , wherein the operations further comprise:

receiving a transaction digest corresponding to the block from the determined blockchain network; and

forwarding the transaction digest to the first node.

12. The system of claim 11 , wherein the operations further comprise:

storing, by the first node, information associated with the transaction digest to a public blockchain.

13. The system of claim 8 , wherein the operations further comprise:

receiving a search request for transaction data from the first node;

determining a search permission associated with the first node based on the search request;

obtaining, from the determined blockchain network, transaction data corresponding to the search permission; and

sending the obtained transaction data to the first node.

14. The system of claim 13 , wherein the determining a search permission associated with the first node comprises:

determining a type of the first node; and

assigning the search permission to the first node based on the determined type.

15. A non-transitory computer-readable storage medium, configured with instructions executable by one or more processors to cause the one or more processors to perform operations comprising:

receiving a transaction request from a first node, the transaction request comprising transaction data;

determining, based on the transaction data, a blockchain network corresponding to the transaction request from a plurality of blockchain networks connected to the one or more computing devices, wherein the first node is excluded from a consensus process associated with the determined blockchain network;

forwarding the transaction request to the determined blockchain network;

receiving, from the determined blockchain network, a block generated based on consensus validation on the transaction request; and

forwarding the block to the first node.

16. The non-transitory computer-readable storage medium of claim 15 , wherein the operations further comprise:

validating, by a node associated with the determined blockchain network, the transaction request forwarded by the one or more computing devices;

generating, by the node associated with the determined blockchain network, the block associated with the transaction request; and

adding, by the node associated with the determined blockchain network, the generated block to a blockchain associated with the determined blockchain network.

17. The non-transitory computer-readable storage medium of claim 15 , wherein the operations further comprise:

storing, by the first node, information associated with the block to a public blockchain.

18. The non-transitory computer-readable storage medium of claim 15 , wherein the operations further comprise:

receiving a transaction digest corresponding to the block from the determined blockchain network; and

forwarding the transaction digest to the first node.

19. The non-transitory computer-readable storage medium of claim 18 , wherein the operations further comprise:

storing, by the first node, information associated with the transaction digest to a public blockchain.

20. The non-transitory computer-readable storage medium of claim 15 , wherein the operations further comprise:

receiving a search request for transaction data from the first node;

determining a search permission associated with the first node based on the search request;

obtaining, from the determined blockchain network, transaction data corresponding to the search permission; and

sending the obtained transaction data to the first node.