lambda with dynamo

create.ts

import { DynamoDB } from 'aws-sdk';

export default {
  handler:'create.main',
  environment: {
    TABLE_NAME: {
      Ref: 'MyTable'
    }
  },
  events: [
    { httpApi: 'POST /new'}
  ]
}

const DocumentClient = new DynamoDB.DocumentClient();

const main = async (event) => {
  await DocumentClient.putItem({
    TableName: process.env.TABLE_NAME,
    Item: JSON.parse(event.body)
  }).promise();

  return 'success';
}

serverless.ts

import create from './create';

const serverlessConfiguration: Serverless = {
  service: 'myServerlessService',
  provider: {
    name: 'aws',
    runtime: 'nodejs12.x'
  },
  functions: {
    create
  },
  resources: {
    Resources: {
      MyTable: {
        Type: 'AWS::DynamoDB::Table',
        Properties: {
          AttributeDefinitions: [
            { AttributeName: 'PK', AttributeType: 'S' },
            { AttributeName: 'SK', AttributeType: 'S' }
          ],
          KeySchema: [
            { AttributeName: 'PK', KeyType: 'HASH' },
            { AttributeName: 'SK', KeyType: 'RANGE' }
          ],
          BillingMode: 'PAY_PER_REQUEST'
        }
      }
    }
  }
};

module.exports = serverlessConfiguration;