Application US20190363874

Decentralized computation system architecture based on node specialization
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US20190363874

1. A decentralized computation system for providing secure and scalable decentralized computation for one or more decentralized applications, the system comprising: (13) (15)

a blockchain; and

a plurality of nodes comprising a plurality of each of three specialized node types, the specialized node types comprising access nodes, security nodes, and execution nodes;

the access nodes configured to perform at least:

a) receiving one or more transactions from at least one client, the one or more transactions each comprising transaction text and credentials;

b) cryptographically signing a hash for each of the transaction text of the one or more transactions based on a determination that the one or more transactions are well-formed;

c) providing the one or more signed hashes to the security node for validation; and

d) providing a state response to the at least one client, the state response determined based on an output for a finalized block;

the security nodes configured to perform at least:

a) generating a candidate block comprising the one or more signed hashes;

b) finalizing the candidate block by performing a Byzantine fault tolerance (BFT) consensus algorithm to validate that a threshold number of access nodes determined that the one or more transactions were well-formed based on the one or more signed hashes; and

c) providing the finalized block to the execution nodes; and

the execution nodes configured to perform at least:

a) receiving, from the access nodes, the transaction text for each of the one or more transactions based on a query provided to the access nodes, the query determined according to the finalized block;

b) presenting a hashed commitment of the output for the finalized block to the other execution nodes, the output for the finalized block determined based on the transaction text for each of the one or more transactions; and

c) revealing the output to the access nodes when each of the other execution nodes has presented the output for the finalized block.

2. The system of claim 1, wherein the access nodes are configured to perform at least: providing the one or more signed hashes to the security nodes when a consensus is reached by the access nodes that the one or more transactions are well-formed. (0)

3. The system of claim 1, wherein the transaction texts for each of the one or more transactions are persisted by the access nodes until the execution nodes provide the hashed commitment of the output for the finalized block. (1) (0)

5. The system of claim 1, wherein the access nodes are configured to perform at least: (0) (4)

a) receiving the hashed commitment of the output for the finalized block from the execution nodes; and

b) providing a query verifying the output for the finalized block to a set of the execution nodes; and

wherein the execution nodes are configured to perform at least:

a) providing the output for the finalized block to the access nodes in response to receiving the query verifying the output for the finalized block.

6. The system of claim 1, wherein the access nodes are configured to perform at least: (0) (2)

7. The system of claim 1, wherein the credentials are for a guarantor of the one or more transactions, and wherein the access nodes are configured to perform at least: (0) (1)

8. The system of claim 1, wherein the access nodes are slashed if they provide a signed hash for a transaction that is ill-formed or if they fail to store the transaction text of the one or more transactions, and wherein the security nodes are slashed if they finalize an invalid candidate block. (0)

9. The system of claim 1, wherein the system provides the decentralized computation for the one or more decentralized applications without sharding or dividing a network into two or more subunits that interact asynchronously. (0)

10. The system of claim 1, wherein the system provides the decentralized computation for, more than 10, more than 100, or more than 1000 decentralized applications. (0)

11. The system of claim 1, wherein the decentralized computation for the one or more decentralized applications comprises more than 1000 transactions-per-second (tps), more than 50,000 tps, or more than 100,000 tps. (0)

12. The system of claim 1, wherein the BFT consensus algorithm comprises a variant of Casper correct-by-construction (CBC), Tendermint-derived scalable BFT (SBFT), Hot Stuff, or Fantomette. (0)

13. The system of claim 1, wherein the access nodes are configured to perform at least: (1) (1)

15. The system of claim 1, wherein the candidate block is generated by a group of the security nodes, the group determined according to the BFT consensus algorithm. (2) (0)

18. The system of claim 1, wherein the finalized block determines an order of the transactions. (0)

19. A decentralized computation system for adding a block to a blockchain comprising: (0) (3)

20. A computer-implemented method of adding a block to a blockchain comprising: (0) (6)

a) receiving, through a plurality of access nodes, one or more transactions from a client;

b) determine, through the access nodes, that the one or more transactions are well-formed;

c) providing, through a plurality of security nodes, a guarantee for the block through a Byzantine fault tolerance (BFT) consensus algorithm employed to finalize the block;

d) determining, through a plurality execution nodes, a result for each of the one or more transactions, once the block is finalized;

e) storing, through the execution nodes, a canonical state of the blockchain; and

f) providing, through the access nodes, responses to queries related the canonical state for the blockchain.

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Application US20190363874

Decentralized computation system architecture based on node specialization

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