On-chain blacklist

[sschiessl-bcp]

The reference UI always has the problem that it can't keep up with the scammers. Should we have an on-chain blacklist?

[grctest]

I suppose you could use an on-chain asset's whitelist to keep track of scammers, there would be the associated asset update fees to account for however.

[abitmore]

FWIW the committee-blacklist-manager account ( id 1.2.1793420) is being used to keep track of (some of) scammers. Perhaps we could use it in beet and/or the reference UI. We can also leverage other community efforts.

[grctest]

I've added this requested functionality for the transfer prompt: #189

There's other operations that we could warn about, like adding a blocked account to your beet wallet, perhaps some of the advanced operations too.

[grctest]

Can close this issue now that the feature is implemented.