Go function invocation context
Invocation context is an object that is optionally accepted by the request handler. It is a context.Context type object and provides an interface for getting more information about Go function version properties:
lambdaRuntimeFunctionName: The function ID (string).lambdaRuntimeFunctionVersion: The function version ID (string).lambdaRuntimeMemoryLimit: The amount of memory specified when creating the function version, MB (int).lambdaRuntimeRequestID: The ID of the request being handled (string).
To extract information from the invocation context, use its Value(key) method and pass it in the key parameter as a string with one of the keys described above.
Authentication in the Yandex Cloud API
If a function has a specified service account, you can use the SDK to obtain information that is necessary for authentication on behalf of this service account. To get this information, use the following methods:
creds := ycsdk.InstanceServiceAccount()
token, err := creds.IAMToken(ctx)
The token.IamToken field contains the required IAM token.
The code above works via the metadata service that is available in the function environment with the specified service account.