How do I get data from JSONDecode?

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#1

Hello! I am wondering how to get the current price of Ethereum from an API I found. But, my code isn’t working. There isn’t any clear tutorials online on how to do this, so I’m just hoping that I can get some help from here.

Here is my code:

local data  = game.HttpService:GetAsync("https://api.coingecko.com/api/v3/coins/markets?vs_currency=usd")
local new = game.HttpService:JSONDecode(data)
print(new.ethereum.current_price)

It should print the current Ethereum price, but all I get is “attempt to index nil with ‘current_price’”. Any help would be appreciated!

#2

I believe that JSONDecode returns a table within a table, so, to get what you are looking for, you would need to add .Data after new.

print(new.Data.ethereum.current_price)
#3

Now it just says “attempt to index nil with ‘ethereum’”

#4

oh whoops, my bad, thats if you used JSONEncode (and I put it wrong, you have to do the .Data inside of the JSONEncode), but I do believe it has something to do with the JSONDecode.

#5

The JSON returned isn’t a dictionary, it’s an array. You have to find which index contains Ethereum then find the price through that.

local HttpService = game:GetService("HttpService")

local data  = HttpService:GetAsync("https://api.coingecko.com/api/v3/coins/markets?vs_currency=usd")
local currencies = HttpService:JSONDecode(data)
local ethereum

for _, currency in ipairs(currencies) do
    if currency.id == "ethereum" then
        ethereum = currency
        break
    end
end

print(ethereum.current_price)
2 Likes
#6

OH MY GOD THANK YOU SO MUCH :smiling_face_with_three_hearts: :smiling_face_with_three_hearts: