@startuml Sequence Diagram - Images
'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/AWSExperimental.puml
!include AWSPuml/Compute/Lambda.puml
!include AWSPuml/NetworkingContentDelivery/APIGateway.puml
!include AWSPuml/General/Internetalt1.puml
!include AWSPuml/General/User.puml
!include AWSPuml/Database/DynamoDB.puml

'Hide the bottom boxes / Use filled triangle arrowheads
hide footbox
skinparam style strictuml

skinparam MaxMessageSize 200

participant "$UserIMG()\nUser" as user
box AWS Cloud
'Instead of using ...Participant(), native creole img tags can be used
participant "$APIGatewayIMG()\nCredit Card System\nAll methods are POST" as api << REST API >>
participant "$LambdaIMG()\nAuthorizeCard\nReturns status" as lambda << python3.9 >>
participant "PaymentTransactions\n$DynamoDBIMG()\nsortkey=transaction_id+token" as db << on-demand >>
endbox
participant "Authorizer\nReturns status and token\n$Internetalt1IMG()" as processor

'Use shortcut syntax for activation with colored lifelines and return keyword
user -> api++ $AWSColor(ApplicationIntegration): <$Callout_1> Process transaction\l<$Callout_SP> ""POST /prod/process""
api -> lambda++ $AWSColor(Compute): <$Callout_2> Invokes lambda with\l<$Callout_SP> cardholder details
lambda -> processor++ $AWS_COLOR_SQUID: <$Callout_3> Submit via API token\l<$Callout_SP> card number, expiry, CID
processor -> processor: Validate and\lcreate token
return status code, token
lambda ->> db: PUT transaction id, token
return status code,\rtransaction id
return status code
@enduml