serverless.yml

service: aws-node-project

plugins:
  - serverless-plugin-typescript
  - serverless-offline

provider:
  websocketsApiName: websockets-api
  websocketsApiRouteSelectionExpression: $request.body.action
  name: aws
  region: "ap-south-1"
  runtime: nodejs12.x
  lambdaHashingVersion: "20201221"
  iam:
    role:
      statements: # permissions for all of your functions can be set here
        - Effect: Allow
          Action: # Gives permission to DynamoDB tables
            - logs:*
            - dynamodb:*
            - states:*
            - events:*
          Resource:
            - "*"
            - "arn:aws:dynamodb:*:*:*"

functions:
  OnConnectHandler:
    handler: handler.onConnect
    events:
      - websocket:
          route: $connect
  OnDisconnect:
    handler: handler.onDisconnect
    events:
      - websocket:
          route: $disconnect
  onBroadcast:
    handler: handler.onBroadcast
    events:
      - websocket:
          route: broadcast
resources:
  Resources:
    WebSocketTable:
      Type: AWS::DynamoDB::Table
      Properties:
        TableName: web-socket-connections
        AttributeDefinitions:
          - AttributeName: connectionId
            AttributeType: S
        KeySchema:
          - AttributeName: connectionId
            KeyType: HASH
        BillingMode: PAY_PER_REQUEST