new predicate: match stx transfers based on memo

[MicaiahReid]

This could help with supporting stx20

[diwakergupta]

This could help with supporting stx20

indeed! FYI @ryanwaits @sabbyanandan for visibility

[sabbyanandan]

💯; also, feedback from a developer and the current pain points with the API approach:

I was gonna do is just use chain hook to kind of filter out all the Stx data stuff with a memo and like stuff that I can then process the memos.
I ended up basically just doing that kind of, I guess, with the with the Api trying to just first. First I just cut out all the pro, all the transactions with memos, and then from there I tried to find the ones and maybe off topic, but the difficulty was making sure to like catch invalid ones. I had to always know people's balances.