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113 lines
2.7 KiB
113 lines
2.7 KiB
## Introduction
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Explore this code and be ready to tell us what is good or/and bad
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## Installation
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- npm install
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- npm install -g ts-node
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- Insert database connection information into ormconfig.json file
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- Run “db-build”
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## Running the app
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```bash
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# development
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$ npm run start
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# watch mode
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$ npm run start:dev
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## Test
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```bash
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# unit tests
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$ npm run test
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# e2e tests
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$ npm run test:e2e
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# test coverage
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$ npm run test:cov
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```
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# Task original
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Create a RESTful API with an endpoint for transaction commission calculation. The API must use JSON format for requests and responses.
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**Request (Transaction) examples**
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*1st example*
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```
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{
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"date": "2021-01-01",
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"amount": "100.00",
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"currency": "EUR",
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"client_id": 42
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}
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```
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*2nd example*
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```
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{
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"date": "2021-01-01",
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"amount": "200.40",
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"currency": "USD",
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"client_id": 42
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}
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```
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**Response (Commission) example**
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```
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{
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"amount": "0.05",
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"currency": "EUR"
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}
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```
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Commission response must **always** be in Euros. Please use a currency rates API ([https://api.exchangerate.host/2021-01-01](https://api.exchangerate.host/2021-01-01)) for transactions in currency other than Euros.
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### Commission calculation rules
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The **lowest** commission shall be used if there are **multiple** rules matching.
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**Rule #1: Default pricing**
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By default the price for every transaction is `0.5%` but not less than `0.05€`.
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**Rule #2: Client with a discount**
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Transaction price for the client with ID of `42` is `0.05€` (*unless other rules set lower commission*).
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**Rule #3: High turnover discount**
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Client after reaching transaction turnover of `1000.00€` (per month) gets a discount and transaction commission is `0.03€` for the following transactions.
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See below an example in CSV format of rules applied to various transactions.
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```jsx
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client_id,date,amount,currency,commission_amount,commission_currency
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42,2021-01-02,2000.00,EUR,0.05,EUR
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1,2021-01-03,500.00,EUR,2.50,EUR
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1,2021-01-04,499.00,EUR,2.50,EUR
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1,2021-01-05,100.00,EUR,0.50,EUR
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1,2021-01-06,1.00,EUR,0.03,EUR
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1,2021-02-01,500.00,EUR,2.50,EUR
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```
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### Testing
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Please write at least one unit and one integration test.
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### Remarks
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- You can use any language and any framework. We expect you to show knowledge of your chosen language's ecosystem (frameworks, 3rd party libraries, etc.)
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- Code must follow good practices (such as SOLID, design patterns, etc.) and be easily extendable in case we need to add additional commission calculation rules in the future
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- Please include `README.md` with instructions how to run your completed task.
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### Submitting the task
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- Make sure you don't mention `[REDACTED]` anywhere in the code or repository name.
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- Please include how long it took for you to do the task.
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