@startuml Sequence Diagram - Technical
'Copyright 2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
'SPDX-License-Identifier: MIT (For details, see https://github.com/awslabs/aws-icons-for-plantuml/blob/master/LICENSE)

' Uncomment the line below for "dark mode" styling
'!$AWS_DARK = true

!define AWSPuml https://raw.githubusercontent.com/awslabs/aws-icons-for-plantuml/v23.1/dist
!include AWSPuml/AWSCommon.puml
!include AWSPuml/Compute/all.puml
!include AWSPuml/NetworkingContentDelivery/APIGateway.puml
!include AWSPuml/General/Internetalt1.puml
!include AWSPuml/Database/DynamoDB.puml

actor User as user
APIGatewayParticipant(api, Credit Card System, All methods are POST)
LambdaParticipant(lambda,AuthorizeCard,)
DynamoDBParticipant(db, PaymentTransactions, sortkey=transaction_id+token)
Internetalt1Participant(processor, Authorizer, Returns status and token)

user -> api: Process transaction\nPOST /prod/process
api -> lambda: Invokes lambda with cardholder details
lambda -> processor: Submit via API token\ncard number, expiry, CID
processor -> processor: Validate and create token
processor -> lambda: Returns status code and token
lambda -> db: PUT transaction id, token
lambda -> api: Returns\nstatus code, transaction id
api -> user: Returns status code
@enduml