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use failure::Error;

#[derive(Debug, Fail)]
pub enum PSError {
    #[fail(
        display = "Verkey has unequal number of Y and Y_tilde elements. Y={} and Y_tilde={}",
        y, y_tilde
    )]
    InvalidVerkey { y: usize, y_tilde: usize },

    #[fail(
        display = "Verkey valid for {} messages but given {} messages",
        expected, given
    )]
    UnsupportedNoOfMessages { expected: usize, given: usize },

    #[fail(
        display = "Same no of bases and exponents required. {} bases and {} exponents",
        bases, exponents
    )]
    UnequalNoOfBasesExponents { bases: usize, exponents: usize },

    #[fail(display = "Error with message {:?}", msg)]
    GeneralError { msg: String },
}