sriharshakappala / wallet

Simple Wallet Service

Setup Environment

This app uses MYSQL for database. For convenience a docker-compose.yml file has been added in this repo for spinning up local environment quickly.

1. Navigate to the root directory of this app
2. Run docker-compose up
3. Once the MYSQL image is pulled and container is started execute this command migrate -path ./migrations -database "mysql://admin:password@tcp(localhost:3306)/wallet" up. This will run the migrations and creates the schema & seeds with initial data.

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Stack

1. App is written in Go Lang
2. Schema is managed by Go Lang migrations utility. This can be installed via brew install golang-migrate. Sample command to create migrations - migrate create -ext sql -dir migrations -seq create_users
3. This uses MYSQL database
4. Dev environment & dependencies managed by docker

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Schema

DBML (https://dbdiagram.io/d)

Table users {
  id integer [primary key]
  username varchar
  created_at timestamp
  updated_at timestamp
}

Table wallet {
  id integer [primary key]
  user_id integer
  balance float
  created_at timestamp
  updated_at timestamp
}

Table transactions {
  id integer [primary key]
  user_id integer
  txn_type string
  txn_date timestamp
  txn_amount float
  closing_balance float
  other_party_id integer
  created_at timestamp
  updated_at timestamp
}

Ref: wallet.user_id - users.id

Ref: users.id < transactions.user_id

Ref: users.id < transactions.other_party_id

Execution

User creation

View Balances

Transaction

Refund

View Statement