shop.lua

local w = require("w")
local r = require("r")
local k = require("k")
local jua = require("jua")
os.loadAPI("json.lua")
local await = jua.await

monitor = peripheral.wrap("left")

r.init(jua)
w.init(jua)
k.init(jua, json, w, r)

local function isempty(s)
    return s == nil or s == ''
end

local function openWebsocket()
    local success, ws = await(k.connect, "")
    assert(success, "Failed to get websocket URL")

    print("Connected to websocket")

    local success = await(ws.subscribe, "transactions", function(data)
        local transaction = data.transaction

        name = string.match(transaction.metadata, "%a+@%a+\.kst")
        print(transaction.metadata, name)
        if not isempty(name) then
            print(name)
        end
    end)
    assert(success, "Failed to subscribe to event")
end

jua.go(function()
    openWebsocket()
end)