-- gets all fields from a hash as a dictionary
local hgetall = function (key)
    local bulk = redis.call('HGETALL', key)
    local result = {}
    local nextkey
    for i, v in ipairs(bulk) do
        if i % 2 == 1 then
            nextkey = v
        else
            result[nextkey] = v
        end
    end
    return result
end