serverless.yml

service: sls-appsync-backend

provider:
  name: aws
  runtime: nodejs12.x
  profile: chcastroStudent

functions:
  hello:
    handler: handler.graphql

resources:
  Resources:
    # Cognito - User pool
    CognitoUserPool:
      Type: AWS::Cognito::UserPool
      Properties:
        UserPoolName: cognito_sls_appsync_user_pool
    # Cognito - Client
    CognitoUserPoolClient:
      Type: AWS::Cognito::UserPoolClient
      Properties:
        ClientName: cognito_sls_appsync_client
        UserPoolId:
          Ref: CognitoUserPool
    # Cognito - Identity
    CognitoIdentityPool:
      Type: AWS::Cognito::IdentityPool
      Properties:
        IdentityPoolName: cognito_sls_appsync_identity_pool
        AllowUnauthenticatedIdentities: false
        CognitoIdentityProviders:
          - ClientId:
              Ref: CognitoUserPoolClient
            ProviderName:
              Fn::GetAtt: [CognitoUserPool, ProviderName]
    # Cognito roles
    CognitoIdentityPoolRoles:
      Type: AWS::Cognito::IdentityPoolRoleAttachment
      Properties:
        IdentityPoolId:
          Ref: CognitoIdentityPool
        Roles:
          authenticated:
            Fn::GetAtt: [CognitoAuthRole, Arn]
          unauthenticated:
            Fn::GetAtt: [CognitoUnauthRole, Arn]
    CognitoAuthRole:
      Type: AWS::IAM::Role
      Properties:
        RoleName: cognito_sls_appsync_appAuthRole
        Path: /
        AssumeRolePolicyDocument:
          Version: "2012-10-17"
          Statement:
            - Effect: "Allow"
              Principal:
                Federated: "cognito-identity.amazonaws.com"
              Action:
                - "sts:AssumeRoleWithWebIdentity"
              Condition:
                StringEquals:
                  "cognito-identity.amazonaws.com:aud":
                    Ref: CognitoIdentityPool
                "ForAnyValue:StringLike":
                  "cognito-identity.amazonaws.com:amr": authenticated
        Policies:
          - PolicyName: "CognitoAuthorizedPolicy"
            PolicyDocument:
              Version: "2012-10-17"
              Statement:
                - Effect: "Allow"
                  Action:
                    - "mobileanalytics:PutEvents"
                    - "cognito-sync:*"
                    - "cognito-identity:*"
                  Resource: "*"
                - Effect: "Allow"
                  Action:
                    - "execute-api:Invoke"
                  Resource: "*"
    CognitoUnauthRole:
      Type: AWS::IAM::Role
      Properties:
        RoleName: cognito_sls_appsync_appUnauthRole
        Path: /
        AssumeRolePolicyDocument:
          Version: "2012-10-17"
          Statement:
            - Effect: "Allow"
              Principal:
                Federated: "cognito-identity.amazonaws.com"
              Action:
                - "sts:AssumeRoleWithWebIdentity"
              Condition:
                StringEquals:
                  "cognito-identity.amazonaws.com:aud":
                    Ref: CognitoIdentityPool
                "ForAnyValue:StringLike":
                  "cognito-identity.amazonaws.com:amr": unauthenticated
        Policies:
          - PolicyName: "CognitoUnauthorizedPolicy"
            PolicyDocument:
              Version: "2012-10-17"
              Statement:
                - Effect: "Allow"
                  Action:
                    - "mobileanalytics:PutEvents"
                    - "cognito-sync:*"
                    - "cognito-identity:*"
                  Resource: "*"