Constructor for a TransactionHandler object.
The DynamoDB stream event that triggered the transaction.
The AWS Lambda context object.
Optionalconfig: TransactionConfigOptional configuration for the transaction.
OptionalallowFailure: booleanFlag to indicate whether to allow transaction failure.
None
Processes the event execution and returns a response based on the outcome.
The execution object to process.
A promise that resolves to a response object or null.
Represents a DynamoDB transaction handler that processes events from a DynamoDB stream.