FlipTheDream/goinsapi

Go Coin API package for creating a standard coin price and balance library for ERC-20 coins and tokens.

Go Coin API

goinsapi modue

This module provides a basic api module for for gathering coinbase information. The initial idea is to add coinbase support and build it up to pull from additional REST/API end points.

TODO:
[X] - Pull data from https://api.ethplorer.io/ to grap coin balances
[X] - Create a service that utilized goapi and refreshes prices and gets balances on demand
[X] - Implement a API server to return portfolio balance based on POST addx
[ ] - Create a containerized microservice
[ ] - Setup a database backend
[X] - Refactor the Token struct to include the getters into the struct ( Not going to add redundant functions for each function. Marking as done.)
[ ] - Update preceision by utilizing a decimal library such as https://github.com/shopspring/decimal.

It utilizes a yaml config file that constains the following:

Configuration for Coinmarketcap

api: url: "https://pro-api.coinmarketcap.com/v1/cryptocurrency/listings/latest" tokenheader: "X-CMC_PRO_API_KEY" token: "YOUR-API-TOKEN-HERE" walletaddress: "0xBB980a1Bf6eCaaA49A6901302E97DA2C6B9dCDbe"

Update config.yml.sample with YOUR-API-TOKEN as needed and rename it to config.yml.

The following functions are provided

• As part of initialization you should set a config variable ex: var CMCApi = goapi.GetConfigData() it returns a yamlConfig type for using when pulling data.
• PullCoinData(yamlConfig Config) is the call to pull data from coinmarketcap.
• GetPrice(sym string) - Accepts a ticker symbol and returns the current price as a float64.
• GetHourChange(sym string) Accepts a ticker symbol and returns the 1 hour percent change as a float64.
• Get24HourChange(sym string) Accepts a ticker symbol and returns the 24 hour percent change as a float64.

Example usage

package main

import (
	"fmt"
	//"goapi"
	"git.local.jnet/wendell/goapi"
)

func main() {
	// Initialize the application with configuration data
	var CMCApi = goapi.GetConfigData()

	// Call to Pull Coin Data from API servers
	goapi.PullCoinData(CMCApi)

    // Call to get tokens associated with the provided ETH addx
	goapi.GetAddressData(CMCApi)

    // Assign the array of ticker symbols assocated with the tokens in the ETH addx records
	var tokens []string = goapi.GetTokenList()