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Hyperledger Fabric provides a Permissionless platform to create private transactions among a few organizations. The private data collection will be stored in a side database called SideDB. The Ordering Service does not see the private data but can only process the hash of private data to all the endorsed peers in the network for validation and ledger update process. We will see in the course of this article, how the Transaction flows with Private data architecture in. the. Transaction flow differs in some cases in comparison with the. Private data transaction flow, Private data. flow.