From which package can I import event types?

[jepetko]

Dear colleagues,

I am struggling with finding the counterpart event types in the new implementation. I want to import types in lambda handlers such as

// version 2
import {APIGatewayProxyEvent, APIGatewayProxyResult, Context} from 'aws-lambda';

but I am unable to find it anywhere. Please can you provide more information about the proper typings for lambda invocations and other types of events?

I also hope to get some feedback on how I migrated DynamoDBStream and CloudWatch events, as it took me long to find it and I am even not sure it is correct.

For example, I migrated DynamoDB Stream event like this as the type has the same structure:

• BEFORE (v2):

import {DynamoDBStreamEvent} from 'aws-lambda';


exports.onDbEvent = async (evt: DynamoDBStreamEvent) => {
// ....
};

• AFTER (v3):

import {GetRecordsOutput} from '@aws-sdk/client-dynamodb-streams';

exports.onDbEvent = async (evt: GetRecordsOutput) => {
// ....
};

Another issue was to find the proper CloudWatch event type. This is how I handled it (unfortunately I failed finding the equivalent types for Context and Callback, see below):

• BEFORE (v2):

import {Callback, Context, EventBridgeEvent} from 'aws-lambda';

exports.onCloudWatchEvent = async (event: EventBridgeEvent<string, any>, context: Context, callback: Callback) => {
// ...
  callback(null, 'Finished');
};

• AFTER (v3):

import {PutEventsRequestEntry} from '@aws-sdk/client-cloudwatch-events';

exports.onCloudWatchEvent = async (evt: PutEventsRequestEntry, context: any, callback: (...args: any[]) => void) => {
// ...
  callback(null, 'Finished');
};

Thank you.