If a destination is reused we mark the cache of the other transactions going to that destination dirty so they are not accidentally reported as trusted when the cache is hit.
09502452bbbe21bb974f1de8cf53196373921ab9 IsUsedDestination should count any known single-key address (Gregory Sanders)
Pull request description:
This plugs the privacy leak detailed at https://github.com/bitcoin/bitcoin/issues/17605, at least for the single-key case.
ACKs for top commit:
meshcollider:
Code Review ACK 09502452bbbe21bb974f1de8cf53196373921ab9
Tree-SHA512: e1d68281675f05072b3087171cba1df9416a69c9ccf70c72e8555e55eadda2d0fd339e5a894e3a3438ff94b9e3827fb19b8b701faade70c08756b19ff157ee0c
Use -whitelist to speed up transaction relay.
The wallet_avoidreuse.py test is not intended to test transaction relay/timing,
so it should be fine to do this here.
This greatly reduces test run time variability and speeds up the test by 2-3
times on average, e.g. on my system from 20-30 seconds down to 8-10 seconds.
