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Hi Yogesh,
To my understanding you must allow partial access (limited to sns arn) from the vendor for it to work, so here my suggested steps:
- create the sns topic in the vendor's account and update it's resource-based policy to allow lambda of your account to subscribe to it.
- update the resource-based policy of the lambda to allow invocation from the vendor's account sns arn.
- subscribe the lambda function in the vendor's account sns topic.
Check out this link for a step by step tutorial: https://www.shogan.co.uk/aws/aws-sns-to-lambda-cross-account-setup/
Sincerley Heiko
answered a year ago
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