Abstract: A blockchain configuration may be used to store a distributed ledger for product review verification procedure. One example method of operation may include receiving a product review for a product purchase transaction by a purchasing entity, validating the product review was submitted by the purchasing entity by referencing the product purchase transaction in a blockchain, storing the product review and product purchase transaction, creating a link to the product review, and transmitting the link to a product site where the product can be purchased.

Abstract: An example operation may include one or more of generating, by a transaction initiator peer, a key pair for a transaction on a blockchain, querying, by the transaction initiator peer, a built-in account manager to discover webhooks of a plurality of blockchain peers, comparing, by the transaction initiator peer, query results from the plurality of the blockchain peers to ensure consistency, encrypting, by the transaction initiator peer, a transaction data with a key of the key pair based on the ensured consistency of the query results, committing, by the transaction initiator peer, the transaction data to the blockchain, and in response to a successful commitment of the transaction data, instantiating, by the transaction initiator peer, a client application executed on the transaction initiator peer to post a decryption key for the transaction data to webhook URLs of the plurality of the blockchain peers.

Abstract: An example operation may include one or more of receiving blockchain specification information, generating one or more security configuration files for a blockchain based on the blockchain specification information, and launching the blockchain on a host platform, and hooking into the host platform via one or more modules which configure security settings of the blockchain based on the one or more security configuration files.

Abstract: An example operation may include one or more of receiving, from a blockchain peer node, a sequence of blocks stored in a hash-linked chain of blocks on a distributed ledger, where each block in the sequence of blocks includes a reduced-step hash of block content from a previous block in the sequence, performing an approximate hash verification on the reduced-step hashes stored among the sequence of blocks, and determining whether the sequence of blocks has been tampered with based on the approximate hash verification on the reduced-step hashes.

Abstract: An example operation may include one or more of storing a full-step hash of a data file and a reduced-step hash of the data file within a data block of a hash-linked chain of blocks of a blockchain, receiving a request from a client application to verify the data file, determining whether to provide the full-step hash of the data file or the reduced-step hash of the data file based on the request, and in response to determining to provide the reduced-hash, transmitting the reduced-step hash of the data file to the client application.

Abstract: An example operation may include one or more of receiving a location of an output stored on a data structure of a blockchain, where the location comprises a path of hashes generated by a reduced-step hash instead of a full-step hash of the blockchain, performing an approximate hash verification on the path of hashes based on the reduced-step hash values to verify whether the output is unused, and in response to a determination that the output is unused as a result of the approximate hash verification, approving a use of the output by a client associated with the output.

Abstract: An example operation may include one or more of transmitting, from a client application, a message to one or more blockchain nodes to store a storage request on a blockchain, the message comprising a full-step hash of the storage request and a reduced-step hash of the storage request, receiving, from a blockchain node, a recordation confirmation indicating the reduced-step hash of the storage request is stored on the blockchain, and verifying, by the client application, whether the recordation of the storage request is correct based on an approximate hash verification of the reduced-step hash of the storage request.

Abstract: An example operation may include one or more of receiving a data block for storage on a blockchain from an orderer node, the data block comprising a full-step hash of a storage request and a reduced-step hash of the storage request, performing an approximate hash verification on the data block based on the reduced-step hash of the storage request included in the data block, and in response to a success of the approximate hash verification, committing the data block among a hash-linked chain of data blocks stored within a distributed ledger of a blockchain.

Abstract: An example operation may include one or more of transmitting, from a client application, a proposed storage request to a plurality of endorser nodes of a blockchain, receiving a first endorsement of the storage request from a first endorser node, the first endorsement comprising a full-step hash verification of the proposed storage request, receiving a second endorsement of the storage request from a second endorser node, the second endorsement comprising a reduced-step hash verification of the storage request, and transmitting a storage proposal including the full-step hash endorsement and the reduced-step hash endorsement to an ordering node of the blockchain.

Abstract: Utilizing blockchain in a gaming environment comprises one or more of receiving one or more contracts related to a game stored in a blockchain, initiating a game session of the game based on the one or more contracts, and receiving information and actions related to a game player in the blockchain based on the initiated game session.

Abstract: An example operation may include one or more of connecting, by a notifier node, to a notifier service node configured to designate the notifier node, receiving, by the notifier node, a notification from the notifier service node to read a block from a ledger of a blockchain, applying, by the notifier node, a function on the block to determine if the notifier node is a designated notifier for at least one submitted transaction in the block, and, in response to a determination that the notifier is the designated notifier, sending, by the notifier node, a push notification to user nodes involved in a transaction associated with the block.

Abstract: An example operation may include one or more of storing a user profile in a blockchain by an authorized member of the blockchain, receiving a request by another authorized member of the blockchain to access the user profile, identifying the request for the user profile is from the another authorized member of the blockchain, creating a signed message that includes consent to share the user profile with the another authorized member of the blockchain, and transmitting the signed message to the another authorized member of the blockchain, and wherein an exchange of the user profile between the blockchain members is performed without revealing blockchain member identities of the authorized member of the blockchain and the another authorized member of the blockchain to any of the blockchain members.

Abstract: One embodiment provides a method, including: obtaining, for each step in a food supply chain, information corresponding to extraneous factors, wherein the extraneous factors comprise factors that may affect quality of a food product within the food supply chain; generating a rating, for each step in the food supply chain, indicating a level of pollution to which the food product was exposed at the corresponding step, wherein the rating comprises (i) scoring each of the extraneous factors based upon a level of pollution identified from the extraneous factors and (ii) aggregating the scores for the extraneous factors to determining a rating; generating, using the rating for each of the steps, an aggregate food supply chain score for the food product, wherein the aggregate food supply chain indicates an impact of pollution across the food supply chain on the food product; and producing a quality rating for the food product.

Abstract: An example operation may include one or more of receiving a request comprising a file segmented into a plurality of segments corresponding to a plurality of storage nodes, identifying a segment from among the plurality of segments which is designated for the storage node from among remaining segments designated for other storage nodes, storing the identified segment in a local storage of the storage node, hashing the identified segment, and transmitting a response to a client system which includes the hashed identified segment.

Abstract: An example operation may include one or more of identifying a blockchain transaction requiring peer endorsement, transmitting a request for endorsement to one or more peers assigned to a blockchain, receiving endorsement response messages from the one or more peers, wherein the endorsement response messages comprise a plurality of priorities assigned to the blockchain transaction, and forwarding the received plurality of priorities and the blockchain transaction to an ordering node for assignment to the peers.

Abstract: The creation of a private sub-blockchain from a main blockchain is disclosed including receiving a request including a trust requirement and an agility requirement, receiving monitoring data from at least one of a plurality of validator nodes of the main blockchain, the monitoring data generated by monitoring the execution of transactions and the exchange of consensus messages by one or more of the plurality of validator nodes, determining a minimum number of validator nodes required to meet the trust requirement, identifying a subset of the plurality of validator nodes of the main blockchain that meets the agility requirement based on the received monitoring data, the subset containing at least the determined minimum number of validator nodes required to meet the trust requirement, and creating a private sub-blockchain of the main blockchain, the private sub-blockchain including the identified subset of the plurality of validator nodes of the main blockchain.

Abstract: An example operation may include one or more of connecting, by a migration server, to a legacy system configured to store legacy data, identifying, by the migration server, artifacts of the legacy system subject to a migration to a blockchain, generating, by the migration server, transactions that correspond to the artifacts of the legacy system, mapping the artifacts of the legacy system to artifacts of the blockchain based on the transactions, and executing, by the migration server, a smart contract to migrate the legacy data corresponding to the mapped artifacts into the blockchain.

Abstract: An example operation may include one or more of generating, by a transaction initiator peer, a key pair for a transaction on a blockchain, querying, by the transaction initiator peer, a built-in account manager to discover webhooks of a plurality of blockchain peers, comparing, by the transaction initiator peer, query results from the plurality of the blockchain peers to ensure consistency, encrypting, by the transaction initiator peer, a transaction data with a key of the key pair based on the ensured consistency of the query results, committing, by the transaction initiator peer, the transaction data to the blockchain, and in response to a successful commitment of the transaction data, instantiating, by the transaction initiator peer, a client application executed on the transaction initiator peer to post a decryption key for the transaction data to webhook URLs of the plurality of the blockchain peers.

Abstract: An example operation may include one or more of receiving, by an account manager node, a request to register a client application executed on a peer connected to a blockchain network of a plurality of participants, wherein the client application generates a transaction data, registering, by an account manager node, the client application, deriving, by the account manager node, a webhook URL from a registration data of the client application, receiving, by the account manager node, a notification of a commitment of the transaction data on the blockchain, and in response to the receiving of the notification of the commitment of the transaction data, sending, by the account manager node, a decryption key for the transaction data to an authorized subset of the participants based on the webhook URL.

Abstract: An example operation may include one or more of identifying a blockchain transaction requiring peer endorsement, transmitting a request for endorsement to one or more peers assigned to a blockchain, receiving endorsement response messages from the one or more peers, wherein the endorsement response messages comprise a plurality of priorities assigned to the blockchain transaction, and forwarding the received plurality of priorities and the blockchain transaction to an ordering node for assignment to the peers.