From 61355a43749cb5507792482e64f45ad5883580dd Mon Sep 17 00:00:00 2001
From: login (tilde.temm)
Date: Fri, 21 Feb 2020 23:27:27 -0500
Subject: Implemented message-character limits in tcoin.cpp and pcoin.cpp

After having received a 10000-character transaction message from ~jan6@envs.net,
I finally came around to implementing character limits on transaction messages.
Previously, I was of the opinion that one should be able to send a movie as a
transaction message if one so wished.
I took inspiration for an appropriate character limit from Australia's NPP (New
Payments Platform), which has a 280-character limit on transaction messages. I
strongly suspect this limit came from Twitter's analysis of tweets in different
languages and Twitter research that concluded that a 280-character tweet was the
appropriate length of tweet. A transaction message is supposedly like a tweet with
some money sent along with it.
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