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Returns the digest of a ledger at the latest committed block in the journal. The response includes a 256-bit hash value and a block address.
See also: AWS API Documentation
See 'aws help' for descriptions of global parameters.
get-digest
--name <value>
[--cli-input-json <value>]
[--generate-cli-skeleton <value>]
--name
(string)
The name of the ledger.
--cli-input-json
(string)
Performs service operation based on the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton
. If other arguments are provided on the command line, the CLI values will override the JSON-provided values. It is not possible to pass arbitrary binary values using a JSON-provided value as the string will be taken literally.
--generate-cli-skeleton
(string)
Prints a JSON skeleton to standard output without sending an API request. If provided with no value or the value input
, prints a sample input JSON that can be used as an argument for --cli-input-json
. If provided with the value output
, it validates the command inputs and returns a sample output JSON for that command.
See 'aws help' for descriptions of global parameters.
To get a digest for a ledger
The following get-digest
example requests a digest from the specified ledger at the latest committed block in the journal.
aws qldb get-digest \
--name vehicle-registration
Output:
{
"Digest": "6m6BMXobbJKpMhahwVthAEsN6awgnHK62Qq5McGP1Gk=",
"DigestTipAddress": {
"IonText": "{strandId:\"KmA3ZZca7vAIiJAK9S5Iwl\",sequenceNo:123}"
}
}
For more information, see Data Verification in Amazon QLDB in the Amazon QLDB Developer Guide.
Digest -> (blob)
The 256-bit hash value representing the digest returned by aGetDigest
request.
DigestTipAddress -> (structure)
The latest block location covered by the digest that you requested. An address is an Amazon Ion structure that has two fields:
strandId
andsequenceNo
.IonText -> (string)
An Amazon Ion plaintext value contained in aValueHolder
structure.