hyperledger

hyperledger fabric

1. ordering service: broadcast and establish concensus
2. identity and membership
3. scalable dissemination(optional): An optional peer-to-peer gossip service disseminates the blocks output by ordering service to all peers
4. smart-contract execution
5. ledger maintenance

limitation of Order-Execute architecture

1. sequential execution
2. no deterministic code
3. confidentiality of execution

fabric Execute-Order-Validation architecture

1. node type

• client: submit transaction proposals and broadcast them
• peer: execute transaction proposals and validate them and maintain blockchain ledger which is append-only not all peers will execute the transaciton proposals, which called endorsing peers execute them.
• ordering service node