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get-block.rst
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**Example 1: To get a journal block and proof for verification using input files** The following ``get-block`` example requests a block data object and a proof from the specified ledger. The request is for a specified digest tip address and block address. :: aws qldb get-block \ --name vehicle-registration \ --block-address file://myblockaddress.json \ --digest-tip-address file://mydigesttipaddress.json Contents of ``myblockaddress.json``:: { "IonText": "{strandId:\"KmA3ZZca7vAIiJAK9S5Iwl\",sequenceNo:100}" } Contents of ``mydigesttipaddress.json``:: { "IonText": "{strandId:\"KmA3ZZca7vAIiJAK9S5Iwl\",sequenceNo:123}" } Output:: { "Block": { "IonText": "{blockAddress:{strandId:\"KmA3ZZca7vAIiJAK9S5Iwl\",sequenceNo:100},transactionId:\"FnQeJBAicTX0Ah32ZnVtSX\",blockTimestamp:2019-09-16T19:37:05.360Z,blockHash:{{NoChM92yKRuJAb/jeLd1VnYn4DHiWIf071ACfic9uHc=}},entriesHash:{{l05LOsiKV14SDbuaYnH7uwXzUvqzIwUiRLXGbTyj/nY=}},previousBlockHash:{{7kewBXhpdbClcZKxhVmpoMHpUGOJtWQD0iY2LPfZkYA=}},entriesHashList:[{{eRSwnmAM7WWANWDd5iGOyK+T4tDXyzUq6HZ/0fgLHos=}},{{mHVex/yjHAWjFPpwhBuH2GKXmKJjK2FBa9faqoUVNtg=}},{{y5cCBr7pOAIUfsVQ1j0TqtE97b4b4oo1R0vnYyE5wWM=}},{{TvTXygML1bMe6NvEZtGkX+KR+W/EJl4qD1mmV77KZQg=}}],transactionInfo:{statements:[{statement:\"FROM VehicleRegistration AS r \\nWHERE r.VIN = '1N4AL11D75C109151'\\nINSERT INTO r.Owners.SecondaryOwners\\n VALUE { 'PersonId' : 'CMVdR77XP8zAglmmFDGTvt' }\",startTime:2019-09-16T19:37:05.302Z,statementDigest:{{jcgPX2vsOJ0waum4qmDYtn1pCAT9xKNIzA+2k4R+mxA=}}}],documents:{JUJgkIcNbhS2goq8RqLuZ4:{tableName:\"VehicleRegistration\",tableId:\"BFJKdXgzt9oF4wjMbuxy4G\",statements:[0]}}},revisions:[{blockAddress:{strandId:\"KmA3ZZca7vAIiJAK9S5Iwl\",sequenceNo:100},hash:{{mHVex/yjHAWjFPpwhBuH2GKXmKJjK2FBa9faqoUVNtg=}},data:{VIN:\"1N4AL11D75C109151\",LicensePlateNumber:\"LEWISR261LL\",State:\"WA\",PendingPenaltyTicketAmount:90.25,ValidFromDate:2017-08-21,ValidToDate:2020-05-11,Owners:{PrimaryOwner:{PersonId:\"BFJKdXhnLRT27sXBnojNGW\"},SecondaryOwners:[{PersonId:\"CMVdR77XP8zAglmmFDGTvt\"}]},City:\"Everett\"},metadata:{id:\"JUJgkIcNbhS2goq8RqLuZ4\",version:3,txTime:2019-09-16T19:37:05.344Z,txId:\"FnQeJBAicTX0Ah32ZnVtSX\"}}]}" }, "Proof": { "IonText": "[{{l3+EXs69K1+rehlqyWLkt+oHDlw4Zi9pCLW/t/mgTPM=}},{{48CXG3ehPqsxCYd34EEa8Fso0ORpWWAO8010RJKf3Do=}},{{9UnwnKSQT0i3ge1JMVa+tMIqCEDaOPTkWxmyHSn8UPQ=}},{{3nW6Vryghk+7pd6wFCtLufgPM6qXHyTNeCb1sCwcDaI=}},{{Irb5fNhBrNEQ1VPhzlnGT/ZQPadSmgfdtMYcwkNOxoI=}},{{+3CWpYG/ytf/vq9GidpzSx6JJiLXt1hMQWNnqOy3jfY=}},{{NPx6cRhwsiy5m9UEWS5JTJrZoUdO2jBOAAOmyZAT+qE=}}]" } } For more information, see `Data Verification in Amazon QLDB <https://docs.aws.amazon.com/qldb/latest/developerguide/verification.html>`__ in the *Amazon QLDB Developer Guide*. **Example 2: To get a journal block and proof for verification using shorthand syntax** The following ``get-block`` example requests a block data object and a proof from the specified ledger using shorthand syntax. The request is for a specified digest tip address and block address. :: aws qldb get-block \ --name vehicle-registration \ --block-address 'IonText="{strandId:\"KmA3ZZca7vAIiJAK9S5Iwl\",sequenceNo:100}"' \ --digest-tip-address 'IonText="{strandId:\"KmA3ZZca7vAIiJAK9S5Iwl\",sequenceNo:123}"' Output:: { "Block": { "IonText": "{blockAddress:{strandId:\"KmA3ZZca7vAIiJAK9S5Iwl\",sequenceNo:100},transactionId:\"FnQeJBAicTX0Ah32ZnVtSX\",blockTimestamp:2019-09-16T19:37:05.360Z,blockHash:{{NoChM92yKRuJAb/jeLd1VnYn4DHiWIf071ACfic9uHc=}},entriesHash:{{l05LOsiKV14SDbuaYnH7uwXzUvqzIwUiRLXGbTyj/nY=}},previousBlockHash:{{7kewBXhpdbClcZKxhVmpoMHpUGOJtWQD0iY2LPfZkYA=}},entriesHashList:[{{eRSwnmAM7WWANWDd5iGOyK+T4tDXyzUq6HZ/0fgLHos=}},{{mHVex/yjHAWjFPpwhBuH2GKXmKJjK2FBa9faqoUVNtg=}},{{y5cCBr7pOAIUfsVQ1j0TqtE97b4b4oo1R0vnYyE5wWM=}},{{TvTXygML1bMe6NvEZtGkX+KR+W/EJl4qD1mmV77KZQg=}}],transactionInfo:{statements:[{statement:\"FROM VehicleRegistration AS r \\nWHERE r.VIN = '1N4AL11D75C109151'\\nINSERT INTO r.Owners.SecondaryOwners\\n VALUE { 'PersonId' : 'CMVdR77XP8zAglmmFDGTvt' }\",startTime:2019-09-16T19:37:05.302Z,statementDigest:{{jcgPX2vsOJ0waum4qmDYtn1pCAT9xKNIzA+2k4R+mxA=}}}],documents:{JUJgkIcNbhS2goq8RqLuZ4:{tableName:\"VehicleRegistration\",tableId:\"BFJKdXgzt9oF4wjMbuxy4G\",statements:[0]}}},revisions:[{blockAddress:{strandId:\"KmA3ZZca7vAIiJAK9S5Iwl\",sequenceNo:100},hash:{{mHVex/yjHAWjFPpwhBuH2GKXmKJjK2FBa9faqoUVNtg=}},data:{VIN:\"1N4AL11D75C109151\",LicensePlateNumber:\"LEWISR261LL\",State:\"WA\",PendingPenaltyTicketAmount:90.25,ValidFromDate:2017-08-21,ValidToDate:2020-05-11,Owners:{PrimaryOwner:{PersonId:\"BFJKdXhnLRT27sXBnojNGW\"},SecondaryOwners:[{PersonId:\"CMVdR77XP8zAglmmFDGTvt\"}]},City:\"Everett\"},metadata:{id:\"JUJgkIcNbhS2goq8RqLuZ4\",version:3,txTime:2019-09-16T19:37:05.344Z,txId:\"FnQeJBAicTX0Ah32ZnVtSX\"}}]}" }, "Proof": { "IonText": "[{{l3+EXs69K1+rehlqyWLkt+oHDlw4Zi9pCLW/t/mgTPM=}},{{48CXG3ehPqsxCYd34EEa8Fso0ORpWWAO8010RJKf3Do=}},{{9UnwnKSQT0i3ge1JMVa+tMIqCEDaOPTkWxmyHSn8UPQ=}},{{3nW6Vryghk+7pd6wFCtLufgPM6qXHyTNeCb1sCwcDaI=}},{{Irb5fNhBrNEQ1VPhzlnGT/ZQPadSmgfdtMYcwkNOxoI=}},{{+3CWpYG/ytf/vq9GidpzSx6JJiLXt1hMQWNnqOy3jfY=}},{{NPx6cRhwsiy5m9UEWS5JTJrZoUdO2jBOAAOmyZAT+qE=}}]" } } For more information, see `Data Verification in Amazon QLDB <https://docs.aws.amazon.com/qldb/latest/developerguide/verification.html>`__ in the *Amazon QLDB Developer Guide*.