After you have loaded some data into the system, you will be able to execute the update-markets.R and update-assets.R files, whose contents are shown below. The first one loads the required definitions, as we did previously when creating the user data, and provides the update_markets_loop() function, which receives a parameter that specifies the number of minutes between each time the live market data is retrieved. Every 60 minutes is a good option, and it's what we use below. The function simply creates a Storage instance using the SETTINGS specification shown before, gets the existing exchanges (which is only CoinMarketCap at this point), and calls the public update_markets() method on each of them, with the corresponding parameters:
library(R6)
library(methods)
source("../storage/storage.R", chdir = TRUE)
source("...
