Invocation context is an object that is accepted by the request handler as the second argument.
The invocation context is an object that provides additional information about function version properties. To get this information in your program, use the following methods:
getFunctionId(): Returns the string ID of the function.
getFunctionVersionId(): Returns the string ID of the function version.
getMemoryLimitInMB(): Returns the amount of memory specified when creating the version, MB.
getRequestId(): Returns the ID of the request being handled.
getToken(): Returns the parameters required for authentication in the Yandex.Cloud API.
Using the invocation context
You can use the invocation context to authenticate in the Yandex.Cloud API.
Authentication in the Yandex.Cloud API
If a function has a specified service account, the
getToken() method returns a structure that contains information for authentication on behalf of this service account and provides the following set of methods to get this information:
getAccessToken(): The IAM token.
getExpiresIn(): The token lifetime in seconds.
getTokenType(): The token type (
You can also get this information using the metadata service. For more information, see Authenticating from inside a VM.