Fix new logic
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Add logic to prevent duplicate logs.
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RECToken can be redeemed by period of time and amount.
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each REC token is unique, it has its own id.
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each REC token stores a list of log id that used to generate each REC token.
Add logic to prevent duplicate logs.
RECToken can be redeemed by period of time and amount.
each REC token is unique, it has its own id.
each REC token stores a list of log id that used to generate each REC token.