The list exists so you can decide in about a minute whether a particular implementation gives you anything checkable, instead of assuming that the phrase on the page means the arithmetic has been done for you.
Not alongside the reveal and not retroactively. If it cannot be shown to predate your play, the model grants nothing, however correct the arithmetic is.
A client seed generated for you, from operator-chosen material, returns to the operator the freedom the model was designed to remove.
Changing the client seed afterwards changes the digests. The value that matters is the one that stood when the bets were placed.
You need the exact message, the delimiters, which digest is used as the key and which part of the output is read. A description that says "HMAC-SHA-256" and stops there is not a recipe.
Rotation frequency sets how much you can ever check. A commitment that is never followed by a reveal leaves you with a promise rather than a verification.
Without a per-round identifier there is nothing to recompute, because the same seeds produce a different result for every nonce.
A pass means the outcome was generated from the committed seed as published. It says nothing about the paytable, the margin, or the next round.
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