crypto-portfolio-manager

README

Requirements

• Go Language
• Postgres or MongoDB
• Docker
• Git
• Go Module
• CoinMarketCap API

You need to develop a REST API and integrate 3rd part API which is used to manage a cryptocurrency portfolio service with CoinMarketCap. It has some basic CRUD operations on currency system.

Let's say, it's listening on localhost at port 8080;

These are example requests and responses it needs to provide;

---

Add a currency

Create a new portfolio data with given parameters and return the total price of your currency.

Sample Request

curl -X PUT \
 -d '{"code": "BTC", "amount": "5"}' \
 -H 'Content-Type: application/json' \
  http://localhost:8080/currency

Errors:

Status Code	Description	Sample Response
200	Success	{"id": 1, "code": "BTC", "amount": 5, price: "302877.0"}
400	When request body or parameters wrong	{"error": "Bad request"}
403	If currency already exists	{"error": "Currency already exists"}
500	When something unexpected happens	{"error": "server error"}

---

Edit a currency's attributes

Edit existing portfolio data with given currency id

Sample Request

curl -X PATCH \
 -d '{"code": "BTC", "amount": "4"}' \
 -H 'Content-Type: application/json' \
  http://localhost:8080/currencies/1

Errors:

Status Code	Description	Sample Response
200	Success	{"id": 1, "code": "BTC", "amount": "4", price: "242301.6"}
400	When request body or parameters wrong	{"error": "Bad request"}
404	If currency not found	{"error": "Currency with that id does not exist"}
500	When something unexpected happens	{"error": "server error"}

---

Delete a currency

Delete exist portflio data with given id

Sample Request

curl -X DELETE \
  http://localhost:8080/currencies/1

Errors:

Status Code	Description	Sample Response
200	Success
400	When request body or parameters wrong	{"error": "Bad request"}
404	If currency not found	{"error": "Currency with that id does not exist"}
500	When something unexpected happens	{"error": "server error"}

---

Find a currency with ID

Get existing portfolio data with historical price changes.

Sample Request

curl -X GET \
  http://localhost:8080/currencies/1

Errors:

Status Code	Description	Sample Response
200	Success	{"id": 1,"code": "BTC","history": [{"amount": 4,"price": {"old": 242301.6,"current": 255064.0}},{"amount":5,"price": {"old": 302877.0,"current": 315353.3}}]}
400	When request body or parameters wrong	{"error": "Bad request"}
404	If currency not found	{"error": "Currency with that id does not exist"}
500	When something unexpected happens	{"error": "server error"}

---

Get All Currencies

Sample Request

curl -X GET \
  http://localhost:8080/currencies

Errors:

Status Code	Description	Sample Response
200	Success	[{"id": 1,"code": "BTC","history": [{"amount": 4,"price": {"old": 242301.6,"new": 255064.0}},{"amount":5,"price": {"old": 302877.0,"current": 315353.3}}]},{"id": 2,"code": "ETH","history": [{"amount": 10,"price": {"old": 42610.0,"current": 4361.4}},{"amount":2,"price": {"old": 8522.0,"current": 8425.0}}]}]
400	When request body or parameters wrong	{"error": "Bad request"}
404	If currency not found	{"error": "Currency with that id does not exist"}
500	When something unexpected happens	{"error": "server error"}

---

Expectations

• This service should be written in Go lang, you can use any framework or library you need.
• There should be a database system to store currency data, preferably Postgres or MongoDB.
• Dockerfile should be provided in the project.
• Code Quality and Design

Extras (Optional)

• Kubernetes deployment setup (yaml file[s])
• Unit tests