Validate a bill id / payment id pair and decode what it means.
Mirrors Common.ValidatePaymentId: both must be 6–13 digits after stripping leading
zeros, the payment id's second-to-last digit must check over the payment id body, and
its last digit must check over billId + paymentId body.
Validate a bill id / payment id pair and decode what it means.
Mirrors
Common.ValidatePaymentId: both must be 6–13 digits after stripping leading zeros, the payment id's second-to-last digit must check over the payment id body, and its last digit must check overbillId + paymentId body.