function parseRecord(t)
    local result = {}
    local start = 1
    local type = hex_to_bytes(t, start, 1)
    --print("type:", type)
    start = start + 2
    local version = hex_to_bytes(t, start, 1)
    --print("version:", version)
    start = start + 2
    local time = hex_to_bytes(t, start, 8)
    --print("time:", time)
    start = start + 16
    local pair = hex_to_bytes(t, start, 1)
    --print("pair:", pair)
    start = start + 2
    local values = {}
    for i = 1, tonumber(pair, 16) do
        local address = hex_to_bytes(t, start, 2)
        -- print("startAdd:", address)
        start = start + 4
        local size = hex_to_bytes(t, start, 2)
        --print("size:", size)
        start = start + 4
        if tonumber(size, 16) / 2 == 0
        then
            values[address] = ""
        end
        for j = 1, tonumber(size, 16) / 2 do
            --print(address, hex_to_bytes(t, start, 2))
            values[address] = hex_to_bytes(t, start, 2)
            address = string.gsub(string.format("%04x", tonumber(address, 16) + 1), "0x", "")
            start = start + 4
        end
    end
    result["type"] = type
    result["version"] = version
    result["time"] = time
    result["pair"] = pair
    result["values"] = values
    -- print(result["type"], result["version"], result["time"], result["pair"])
    for k,v in pairsByKeys(result["values"]) do
        -- print(k,v)
    end
    -- print(tableToJson(result))
    return tableToJson(result)
end

function pairsByKeys(t)
    local a = {}
    for n in pairs(t) do
        a[#a + 1] = n
    end
    table.sort(a)
    local i = 0
    local iter = function()
        i = i + 1
        if a[i] == nil
        then
            return nil
        else
            return a[i], t[a[i]]
        end
    end
    return iter
end

function length(t)
    local res=0
    for k,v in pairs(t) do
        res=res+1
    end
    return res
end

function hex_to_bytes(hex, start, len)
    local value = hex:sub(start, start + len * 2 - 1)
    if len > 1
    then
        value = toBigEndian(value)
    end
    return value
end

function toBigEndian(value)
    --print(string.len(value))
    local hexResult = ""
    for i = string.len(value), 1, -2 do
        local hex = value:sub(i - 1, i)
        hexResult = hexResult .. hex
    end
    return hexResult


    --local s2 = tonumber(value, 16)
    ----print(s2)
    --s2 = string.pack("<i2", s2)
    --local hexResult = ""
    --for i = 1, #s2 do
    --    --local var = string.unpack("B", s2, i)
    --    hexResult = hexResult .. string.format("%x", string.unpack("B", s2, i))
    --    --print(hexResult)
    --end
    --return hexResult
end

function tableToJson(tbl)
    local function serializeTable(val, name, indent, depth)
        local tblType = type(val)
        if tblType == "table" then
            local result = {}
            if depth > 0 then
                table.insert(result, "{\n")
            end
            local keys = {}
            for k in pairs(val) do
                table.insert(keys, k)
            end
            table.sort(keys)
            for i, k in ipairs(keys) do
                local v = val[k]
                local key = type(k) == "number" and "" .. k .. "" or '"' .. k .. '"'
                if type(v) == "table" then
                    table.insert(result, string.rep(indent, depth + 1) .. key .. " : " .. serializeTable(v, name, indent, depth + 1) .. ",\n")
                else 
                    if(i == length(keys)) then
                        table.insert(result, string.rep(indent, depth + 1) .. key .. " : \"" .. tostring(v) .. "\"\n")
                    else
                        table.insert(result, string.rep(indent, depth + 1) .. key .. " : \"" .. tostring(v) .. "\",\n")
                    end
                end
            end
            if depth > 0 then
                table.insert(result, string.rep(indent, depth) .. "}\n")
            end
            return table.concat(result)
        elseif tblType == "number" then
            return tostring(val)
        elseif tblType == "string" then
            return '"' .. val .. '"'
        else
            return tostring(val)
        end
    end

    return "{" .. serializeTable(tbl, "root", "", 0) .. "}"
end

--parse("1Bfjx615uzpncE5GQsHydLQ631y2DmcWRQdnK4XqErRxyo2QSP88cmbhuKbUSnqFixv39kyBXpEewZJ8Uxb8yWVemoCQjQFFta9sxbm64NXYt8yNFB9QgyCLxnHdqcXF5hshzuY9VkGYpWxykgdr8c2TZ1XsjX7bDS35f6YfCfoU4qmQkTCgcZXNMLt7G7dL4aD8szZUHLwVn")
-- parse("0001801a860f000000000451c30a0051c352c353c354c355c3419c0600419c429c439ca49c4400a49ca59ca69ca79ca89ca99caa9cab9cac9cad9cae9caf9cb09cb19cb29cb39cb49cb59cb69cb79cb89cb99cba9cbb9cbc9cbd9cbe9cbf9cc09cc19cc29cc39cc49cc59c317528003175327533753475357536753775387539753a753b753c753d753e753f7540754175427543754475")
--toBigEndian("801a860f00000000")