synchronizer: show progress in GUI (take 1) (num_addrs, num_txs) #5312
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I think the user should be shown some details regarding the progress/state of the history sync.
This has become even more relevant recently, with servers getting DDOS-ed and as a consequence becoming slower/less responsive.
Instead of
Synchronizing...
,we now display
Synchronizing... ({num_subs} addrs, {num_txs} txs)
num_subs
is the number of addresses for which the client sentblockchain.scripthash.subscribe
and received the initial scripthash status from the server,num_txs
is the number of "raw hex" transactions that are already stored in the wallet(I know, the kivy version is somewhat ugly; I can try to improve it)