<gh_stars>10-100
class BlockchainException(Exception):
    pass


class InvalidHash(BlockchainException):
    pass


class ChainContinuityError(BlockchainException):
    pass


class InvalidTransactions(BlockchainException):
    pass


class GenesisBlockMismatch(BlockchainException):
    pass


class InvalidCoinbaseTransaction(BlockchainException):
    pass

class BlockchainException(Exception):
    pass


class InvalidHash(BlockchainException):
    pass


class ChainContinuityError(BlockchainException):
    pass


class InvalidTransactions(BlockchainException):
    pass


class GenesisBlockMismatch(BlockchainException):
    pass


class InvalidCoinbaseTransaction(BlockchainException):
    pass