Hello everyone! I am an AWS solutions architect and I am currently building a custom Data Action that triggers an AWS Lambda function to perform a real-time database lookup. I am trying to use the ‘AWS IAM’ authentication type for the Data Action, but I am getting a ‘Credential validation failed’ error when I test the action. I have confirmed that the IAM role has the lambda:InvokeFunction permission. Is there a specific trust relationship or a policy statement that I need to add to the role to allow Genesys Cloud to assume it?
Greetings! I am an outbound API developer and I use Lambda for all our contact list automations. You definitely need to add a trust policy to your IAM role that allows the Genesys Cloud AWS account ID to assume the role. You can find the specific account ID for your region in the Genesys Cloud documentation. Without that trust relationship, the STS service will reject the AssumeRole request every time.
I must remind you that when you use IAM roles for cross-account access, you should also implement an ‘External ID’ for added security. This prevents the ‘Confused Deputy’ problem where another Genesys Cloud customer could theoretically try to assume your role. It is a banking industry standard and I highly recommend it for any production integration.
Hey guys. I am a junior dev and I am working on a similar integration. I found that I also had to enable the ‘User-Defined’ variables in the Data Action configuration to pass the external ID correctly. If you leave that out, the authentication will fail even if your IAM policies are correct. I spent two days debugging that!