I'v noticed that the current version of transaction in monero is now: vin, vout, extra, rct_signatures etc. My question is - when I run monero in testnet environment on my computer, the transaction include 'signature' field instead of the 'rct_sigantures' filed, and I'v try to figure out why is that. From the context of the code I understood that this difference caused by the 'version' field, but I don't understand when 'version' is changed, and if I can use the rct_signatures field from the start (height 0)
Thank you!!!