cryptomonitor/cloudformation.yaml at master · drewdresser/cryptomonitor · GitHub

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AWSTemplateFormatVersion : '2010-09-09'
Transform: AWS::Serverless-2016-10-31
Description: A stack to store and alert user about crypto currencies.

Parameters:
  PhoneNumber:
    Type: String
    Description: The phone number recipient of the coin alert, in E.164 (e.g. +15555550100) format.
    Default: 0
  PctChangeCutoff:
    Type: Number
    Description: The percent change of a coin for which you would like to get an SMS alert for.
    Default: 5
  CoinList:
    Type: String
    Default: BTC,ETH
    Description: The list of coins to be alerted about, separated by commas and no spaces (e.g. "BTC,ETH,LTC").

Resources:
  Alert:
    Type: AWS::Serverless::Function
    Properties:
      Handler: alert.lambda_handler
      Runtime: python3.6
      Timeout: 60
      Environment:
        Variables:
          PHONE_NUMBER: !Ref PhoneNumber
          COIN_LIST: !Ref CoinList
          SNS_TOPIC: !Ref SNSTopic
          TABLE_NAME: !Ref DynamoDBTable
          PCT_CHANGE_CUTOFF: !Ref PctChangeCutoff
      Events:
        Timer:
          Type: Schedule
          Properties:
            Schedule: rate(5 minutes)
      Policies:
        - SNSPublishMessagePolicy:
            TopicName: !GetAtt SNSTopic.TopicName
        - DynamoDBCrudPolicy:
            TableName: !Ref DynamoDBTable

  CollectPrices:
    Type: AWS::Serverless::Function
    Properties:
      Handler: collect.lambda_handler
      Runtime: python3.6
      Timeout: 60
      Environment:
        Variables:
          TABLE_NAME: !Ref DynamoDBTable
      Events:
        Timer:
          Type: Schedule
          Properties:
            Schedule: rate(5 minutes)
      Policies:
        - DynamoDBCrudPolicy:
            TableName: !Ref DynamoDBTable

  SNSTopic:
    Type: "AWS::SNS::Topic"
    Properties:
      DisplayName: CryptoAlert
      Subscription:
        -
          Endpoint: !Ref PhoneNumber
          Protocol: "sms"

  DynamoDBTable:
    Type: AWS::DynamoDB::Table
    Properties:
      AttributeDefinitions:
        -
          AttributeName: CoinId
          AttributeType: S
        -
          AttributeName: TimeStamp
          AttributeType: N
      KeySchema:
        -
          AttributeName: CoinId
          KeyType: HASH
        -
          AttributeName: TimeStamp
          KeyType: RANGE
      ProvisionedThroughput:
        ReadCapacityUnits: 5
        WriteCapacityUnits: 5