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Fintech Project

Dependencies:
  • golang https://golang.org/doc/install
  • dep https://github.com/golang/dep
Build:
make build

Problem Statement:

Suatu hari anda terfikir untuk membangun sebuah applikasi fintech yang dapat melakukan transaksi non tunai, sebagai Minimum Viable Productnya anda ingin applikasi ini memiliki feature berikut

Transaksi :

  • customer dapat melakukan pendaftaran
  • sebagai owner anda dapat mendaftarkan merchant baru yang dapat melakukan transaksi
  • customer dapat melakukan pengisian balance (Topup)
  • customer dapat melakukan pembayaran kepada merchant" yang telah terdaftar

Meet the actor :

  • customer:

  • merchant:

  • transaksi

    • customer dapat topup
    • customer dapat transaksi ke merchant yang telah terdaftar

Some Spec:

GIVEN I am unregister person
WHEN i register as customer with (name, email, phone)
THEN e-wallet should record it as new customer and return my wallet-id

GIVEN I am owner of Ewallet
WHEN i register new merchant with (name, email)
THEN e-wallet should record it as new merchant and return merchant wallet-id

GIVEN I am customer of Ewallet
WHEN i topup some amount
THEN e-wallet my balance should increased

GIVEN I am customer of Ewallet
WHEN i pay merchant 
THEN my balance should decreased, and merchant balance should increased, and i get transactionsID

(entity) user_accounts
 - user_id
 - name
 - email
 - phonenumber
 - user_type (merchant | customer)

(entity) wallet
 - wallet_id
 - user_id
 - balance

(entity) transaksi
  - id
  - reference
  - date
  - description
  - type (topup | payment)
  
topup:
  - credit wallet

payment:
  - credited wallet (merchant walletid)
  - debited wallet (customer walletid)

service
  - register_customer | register_merchant =
    - add new user to user_accounts
    - add new wallet to wallet 

  - topup:
    - add new transaksi with type topup 
    - increase balance from wallet

  - payment:
    - add new transaksi with type payment 
    - decrease balance from debited wallet
    - incrase balance from credited wallet

API:
  -> :register_customer
    {
      "name": "",
      "email": "",
      "phonenumber": ""
    }
  -> :register_merchant
    {
      "name": "",
      "email": ""
    }
  -> :topup
    {
      "wallet_id": "",
      "amount": ""
    }
  -> :payment
    {
      "wallet_id": "",
      "amount": "",
      "merchant_id": ""
    }

TODO:

masi banyak kekurangan dari implementasi code ini, misalnya implementasi repository yang belum ada (hanya mock), kebutuhan untuk wrap logic kedalam database transaction (for consistency) dan non happy path test