Function sentry::spender::fee::calculate_fee

pub fn calculate_fee(
    (_earner, payout): (Address, UnifiedNum),
    validator: &ValidatorDesc
) -> Result<UnifiedNum, DomainError>

Calculates the fee for a given payout of the specified validator This function will return None if the provided validator is not part of the Campaign / Channel In the case of overflow when calculating the payout, an error will be returned