Handle "no zero transfer" tokens #250
Open
+149
−88
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resolves BLK-253
looked to find places where zero value custom gas token (or rollup stake token) transfers could occur. these are marked in 2 commits: b69072d and ed56f91
after reviewing the token bridge contracts too, it seems that zero transfers are only maybe possible in the creator if a zero gas price bid is set. This is fine though
mentioning #230, because this PR may be enough of a reason to merge it