April 2020
Intermediate to advanced
244 pages
7h 20m
English
Content preview from Securing Blockchain Networks like Ethereum and Hyperledger Fabric
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Ordering phase
Once the necessary endorsements are obtained, the client node creates the transaction containing the chaincode instructions (transaction payload), the metadata, and the endorsements received, and forwards it to the ordering service. The task of the ordering service is to define the overall order of all transactions within the network.
Since Hyperledger Fabric allows you to combine multiple blockchains into the same ordering service, each separate blockchain is identified as a separate channel, together with its member nodes. Each channel, therefore, has a total order of transactions, which is distinct from other channels. The ordering service groups the transactions within the blocks and ensures that the blocks are fully ordered. ...
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