local HTTPService = game:GetService("HttpService")
local lockbox = require(script.Parent.lockbox)
lockbox.bit = require(script.Parent.bit).bit
local array = require(lockbox.util.array)
local stream = require(lockbox.util.stream)
local base64 = require(lockbox.util.base64)
local hmac = require(lockbox.mac.hmac)
local sha256 = require(lockbox.digest.sha2_256)

local secretKey = "16813a12f718bc5c620f56944e1abc3ea13ccbac"

local function hmacAuthHash(body, key)
    local hmacBuilder = hmac()
        .setBlockSize(64)
        .setDigest(sha256)
        .setKey(array.fromString(key))
        .init()
        .update(stream.fromString(body))
        .finish()
    return base64.fromArray(hmacBuilder.asBytes())
end

function Request_Init(endpoint)
    local InitPayload = {
        ["platform"] = "ios",
        ["os_version"] = "ios 8.2",
        ["sdk_version"] = "rest api v2"
    }
    local InitPayloadJSON = HTTPService:JSONEncode(InitPayload)

    local Headers = {
        ["Authorization"] =  hmacAuthHash(InitPayloadJSON, secretKey)
    }

    local success, InitResponse = pcall(function() return HTTPService:PostAsync(endpoint,InitPayloadJSON,Enum.HttpContentType.ApplicationJson, false, Headers) end)

    if not success then
        print("PostAsync Error for endpoint",endpoint,"        ERROR:",InitResponse)
        return
    else
        print("PostAsync Success for endpoint",endpoint,"      RESPONSE:",InitResponse)
        return
    end
end

Request_Init("http://sandbox-api.gameanalytics.com/v2/5c6bcb5402204249437fb5a7a80a4959/init")