Hyperledger Explorer

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Unit 6



Q.1} What is hyperledger explorer? State its key features.

            Hyperledger Explorer is an open source blockchain  utility module that allows users to create a user-friendly web-based application, with which a user can view, initiate, organize or query various artifacts and developments that form an integral part of the blockchain network.

            Hyperledger Explorer is a tool for visualizing blockchain operations of the Hyperledger Fabric platform. It is the first ever blockchain explorer for permissioned ledgers, allowing anyone to explore the distributed ledger projects being created by Hyperledger’s members from the inside, without compromising their privacy. The project was contributed by DTCC, Intel, and IBM. The ability to visualize data is of critical importance, in order to extract business value from it. Hyperledger Explorer provides this much needed functionality

Key features of Hyperledger Explorer

  • Web application with a rich user interface, developed using latest technologies, such as ReactJS, Google material ui, web-sockets, and others
  • Blockchain module that can listen, and query a Hyperledger Fabric network
  • Utility that can
                -- Get the latest status blocks, network, and chaincodes, view blocks, and transactions

                -- Blocks and transactions metrics by hours, and minutes.

                -- Search, and filter blocks, transactions by date range and channels

                -- Dynamically discover new channels and switch data presentation by channels

                -- Get real time notification of new blocks



Q.2} Explain following features of hyperledger explorer

       a. Dark theme screen
                The dark theme mode is another view of the Hyperledger Explorer, there can be some potential benefits by switching to it.

        b. Block list
                Block list displays a list of the block attributes, and links to block, and transaction pop up details window. Please notice when mouse over it will display the actual block hash. Displaye d in a table all the headers are sortable either descending or ascending depending of the direction selected. A filter can be applied to search by date range, and selected organization from the list.

        c. Block details window
                This screen represents in detail a block. You can see the creation of the block, number of transactions in this block, block hash, data hash, and the previous hash that connects to the previous block. For usability you can copy any of the hashes using the clipboard icon.

        d. Filter result
                By default block list will return one day woth of data, but you can modify the search criteria to search historical data, and apply also filter to the returned result. List can be sorted by one of desired direction, ascending or descending. To clear the global filter you can use the Clear Filter button. The Reset button can be used to reset the date range, and the organizations selection



Q.3} Explain following features of hyperledger explorer

        a. Transaction list
                Transaction list screen has almost identical functionality as the block list screen, the number of rows per page, up to 100, can be selected from the drop down, next and previous buttons allow to navigate the direction of results, back or forward.

        b. Chaincode list
                Chaincode list displays the chaincode properties and has filter, and sort functionalities. Displayed list is for the current selected channel.

        c. Channel list
                Channel list displays all the channels, and it’s properties, has similar filter, and sort functionalities as chaincode list.

        d. Metrics

                Metrics panel has four tabs that will show the latest statistics of blocks, and transactions per selected channel. By hovering mouse over at any point of intersection in the graph will show the counts per hour, or minute. Click on any tabs below to see the metrics per block/transaction, hours or minute.


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