GetIntermediateWinner using a payout transaction signature.

GetUserAmountMinted for the amount the given address has minted so far.

GetUserMintLimit for the per-user limit for the given token.

InsertIntermediateWinner to use later in comparing the winners to the database.

Context is the context printed during logging.

TableIntermediateWinners to use to track winners that were paid out and need to be linked in the winners database to the winning transaction.

TableMintLimits is used to store each token's per user mint limit.

TableUsers is used to implement mint limits for individual users.