- struct openingClaimStatus - the struct used if an open channel is being claimed
  because of an unsuccessful closure
    - totalCoinsL uint - the total number of coins opened into the payment channel
    - redeemedCoins: uint - the total number of coins whose claims have been redeemed so far
- public self.openingClaimsInProgress[openingCommitmentsHash:bytes32]
     -> openingClaimStatus
     - this is a mapping of "in progress" claims on opened channels