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D1 provides a batch processing service that lets the issuer backend execute selected D1 operations in bulk.

The issuer backend prepares a batch input file and uploads it to the D1 platform over an SFTP connection.

When processing is complete, D1 generates a JSON output file that contains the result of each operation in the batch. The issuer backend can then download and process this output file to reconcile and analyze the results.

For information about how to create and manage an SFTP account with Thales, contact your Thales delivery team.

Batch file naming convention

Input batch file names must follow one of the following formats:

"BatchId"-"SeqNumber"-"UNIX_UTC_Timestamp".json

"IssuerId"-"BatchId"-"SeqNumber"-"UNIX_UTC_Timestamp".json

Output batch file names follow the corresponding formats (depending on the input format):

"BatchId"-"SeqNumber"-"UNIX_UTC_Timestamp"_OUT.json

"IssuerId"-"BatchId"-"SeqNumber"-"UNIX_UTC_Timestamp"_OUT.json

Where:

Name	Description
IssuerId	Optional. The unique identifier of the issuer.
BatchId	The unique identifier of the batch file.
SeqNumber	The sequence number of the batch file. Use this when a large batch is split into multiple files.
UNIX_UTC_Timestamp	A UNIX epoch timestamp in seconds, in UTC.

Example:

• BatchId = 87889898

• SeqNumber = 001

• Input file: 87889898-001-1563188489.json

• Output file: 87889898-001-1563188615_OUT.json

Supported operations

D1 batch processing supports the following types of operations:

• End user and card registration

• End user and card registration with digital card migration

The following diagram shows a high-level overview of these two operations:

High-level batch registration and digital card migration flow

Steps 4 and 5 are executed only when digital card migration is requested.

Batch campaign configuration

During D1 onboarding, configuration is defined for each registration campaign, including:

• The maximum number of records to process per second

• The maximum duration of the campaign before it expires