transaction-processor

Chalice was used for this project https://aws.github.io/chalice/

Requirements

python 3.9
A account in AWS

Install

clone project and change to created directory.

$ git clone https://github.com/ghap16/transaction-processor.git
$ cd transaction-processor

Inside the new directory you will see a structure like this.

transaction-processor
│   README.md
│   .gitignore    
│
└───assets
│   │   transaction_summary.json
│   │   transaction-example1.csv
│   │   ...
│
└───src
    │   │   config.json   
    └───.chalice
    │   │   config.json
    │   │   policy-dev.json
    │   
    └───chalicelib
    │   │   ...
    │   
    └───tests
    │   │   ...
    │   
    │   app.py
    │   pytest.ini
    │   requirements-dev.txt
    │   requirements.txt
    │   ...

Create virtual environment.

$  python3 -m venv venv

Install requirements.

$  pip install -r requirements-dev.txt
$  pip install -r requirements.txt

Configuration

Verify email

In order to send and receive email within the sandbox, it is necessary to verify the email in AWS SES https://docs.aws.amazon.com/ses/latest/dg/creating-identities.html

Config Bucket and emails

You need to have a bucket and set that bucket in the environment variables inside the src/chalicelib/.chalice/config.json file. In that same file is the configuration for email_to and email_from, these emails should be previously verified in AWS SES

Upload template

Upload the assets/transaction-summary.html file to the configured bucket.

Run

Configure your aws credentials in ~/.aws/config.

Go to src directory.

$  cd src

local

Run following command

$  chalice local --stage dev

Deploy

Run following command

$  chalice deploy --stage dev

When finished, it will return something like the following:

	Creating deployment package.
    Updating policy for IAM role: transaction-processor-dev-api_handler
    Updating lambda function: transaction-processor-dev
    Updating rest API
    Resources deployed:
      - Lambda ARN: arn:aws:lambda:us-east-1:579314821033:function:transaction-processor-dev
      - Rest API URL: https://whmpk53c6j.execute-api.us-east-1.amazonaws.com/api/

Test

Inside the assets directory there is a postman collection, with this it can be loaded and tested by changing only a few variables according to the ones you have.

Develop

UnitTest

$ pytest

Sorting and Formatting

$ isort .
$ black .

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