jsii-java: Lambda Permission sourceAccount is required #714
Description
I am trying to add a permission to my Lambda function to allow Alexa to call it when my skill is invoked (as described here).
function.addPermission("AlexaFunctionPermission", Permission.builder()
.withAction("lambda:InvokeFunction")
.withPrincipal(new ServicePrincipal("alexa-appkit.amazon.com"))
.withEventSourceToken(props.getSkillId())
.build());
However, when I go to synthesize my template I get the following error:
Exception in thread "main" java.lang.NullPointerException: sourceAccount is required
at java.base/java.util.Objects.requireNonNull(Objects.java:246)
at software.amazon.awscdk.services.lambda.Permission$Builder$1.<init>(Permission.java:188)
at software.amazon.awscdk.services.lambda.Permission$Builder.build(Permission.java:186)
at com.amazon.alexa.Skill.addTarget(Skill.java:37)
at com.amazon.alexa.MyStack.<init>(MyStack.java:34)
at com.amazon.alexa.CdkSkillApp.<init>(CdkSkillApp.java:13)
at com.amazon.alexa.CdkSkillApp.main(CdkSkillApp.java:17)
The addPermission API states that this field is not required and it makes no sense to provide it for this use case.