BlockReader application extract and showcase the complete data structure of a Block that contains several details for a transaction. The application will require a transaction id to query the ledger to retrieve the associated block. Then the application will follow the Block data structure to read the content of the Block.
Medium writeup : https://medium.com/@deeptiman/whats-inside-the-block-in-hyperledger-fabric-69a0934fef08
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Compile the application using following commands
cd /go/src/github.com/blockreader go buildYou can see blockreader executable is generated.
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Now type following commands to read the Block.
./blockreader -txnId="cd2b072c880cdefbea66c5f9d73a5a5eb3c3977e77772fba42cec59204ca2980" -channelId="employeeledger" -txnId : The transaction id to be query to retrieve the Block for that transaction from the ledger. -channelId: The network ChannelId -
After that, you will see the Block details in a JSON format.
************* BLOCK READER JSON ************* { "BlockHeader": { "number": 2, "previous_hash": "2e8ddbf2dfd6b90fdadd0f2653f932f9f8bb7922244f991b66fc9ebeff3c63c1", "data_hash": "6df36db3c31ac485754d7e840574bf53639539d9b810c433cec143fe234557e8" }, "BlockData": { "envelope": { "header": { "payload": { "channel_header": { "type": "ENDORSER_TRANSACTION", "version": 0, "channelid": "employeeledger", "txid": "c3d95a4e5606cae3a1aabced9fe532f7f628b2930eb09452f2b0db62f6e6ee0b", "epoch": 0, "extension": { "chaincode_id": { "path": "", "name": "employeeledger", "version": "" } } }, "signature_header": { "creator": { "msp_id": "org1.employee.ledger.com", "cert_hash": "-----BEGIN CERTIFICATE-----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\n-----END CERTIFICATE-----\n", "certificate": { "country": [ "US" ], "organization": [ "org1.employee.ledger.com" ], "organization_unit": null, "locality": [ "San Francisco" ], "province": [ "California" ], "serial_number": "", "not_before": "2020-01-19T20:17:00Z", "not_after": "2021-01-18T20:22:00Z" } } } } }, "data": { "transaction": { "chaincode_proposal_payload": { "chaincode_invocation_spec": { "chaincode_spec": { "chaincode_id": "employeeledger", "chaincode_type": "GOLANG", "chaincode_args": [ "invoke", "createUser", "Deeptiman Pattnaik", "test1@gmail.com", "Personal", "Software", "90,000", "Admin" ] } } }, "chaincode_endorsed_action": { "proposal_response_payload": { "proposal_hash": "0597a5c323fa68d26e3063ccf640f8658c19f80454b573866cf0614fc2d57f11", "chaincode_kv_rw_set": { "reads": { "Key": "employeeledger", "version": { "block_num": 1, "txnum": 0 } }, "range_queries_info": { "startkey": "", "endkey": "", "itr_exhausted": false }, "writes": { "key": "", "is_delete": false }, "metadata_writes": { "key": "", "name": "" } }, "chaincode_events": { "chaincode_id": "employeeledger", "txid": "c3d95a4e5606cae3a1aabced9fe532f7f628b2930eb09452f2b0db62f6e6ee0b", "event_name": "addUserInvoke", "payload": "" } } } } } } }, "BlockMetaData": { "value": null, "signature": "MEQCICshHeJiB1d1SdBmOyVaQLBrgmAOsrxwEEUO3ZkbB/gDAiAuGcyGDC/i8ExrfZg0p5zzSP/HnBODqSOe5kucVA0ZQg==", "signature_header": { "creator": { "msp_id": "employee.ledger.com", "cert_hash": "-----BEGIN CERTIFICATE-----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\n7PYTnIUfx6l7ruLU+LuJywzxkKD0AScR\n-----END CERTIFICATE-----\n", "certificate": { "country": [ "US" ], "organization": [ "employee.ledger.com" ], "organization_unit": null, "locality": [ "San Francisco" ], "province": [ "California" ], "serial_number": "", "not_before": "2020-01-18T08:04:01Z", "not_after": "2030-01-15T08:04:01Z" } } } } }
This project is licensed under the MIT License