This endpoint provides up-to-the-minute crypto exchange rates relative to US dollars:
https://api.coinbase.com/v2/exchange-rates?currency=USD
Crypto is all the rage these days and I don't want to miss out! I want to keep 70% of my crypto holdings in BTC and 30% in ETH. Write a function that takes the amount I have to spend in USD as a parameter and returns the number of Bitcoin and Ethereum to buy.
I have $X I want to keep in BTC and ETH, 70/30 split. How many of each should I buy?
I'd say you should take the input amount as a command line parameter and print a json response with the allocations back out of your program.
Create a go program that, via CLI, requires an input arg and prints json containing the 70% BTC and 30% ETC allocations
Initial sketch of steps to explore go:
- Accept input ✅
- Accept input as a command line parameter (args library w/ flag, help) ✅
- Handle json response ✅
- Calculate + store exchange rates + amounts ✅
- Write test file
Optional things to explore:
- Check out if docstrings
- Classes?
- Print to a file
- file formatting (weird spacing)
Next Steps:
- Break into three-ish testable functions (accept input, handle/format coinbase json request + response, business logic)
- Write tests for each functions, ex. ensure incorrect input formats handled, json request/response formatting/data issues, business logic w/ mocked respone data
- Used Go Getting Started to setup directory and complete hello world exapmle.
- Use
go mod init example/hello,go mod init example.com/greetingsto enable dependency tracking - Use
go mod tidyto add imported modules - Use
go mod edit -replace example.com/greetings=../greetingsto use local vs. published package - Go has built in testing, add _test.go to have
go testinclude it in check go build- compiles pkgs + deps, no installgo install- compiles pkgs + installgo list -f '{{.Target}}'- discover the go install path, where binaries are installed