Enum BillingError 

pub enum BillingError {
    InvalidInput {
        reason: String,
    },
    MonetaryOverflow {
        input_value: Option<Decimal>,
    },
    UnsupportedEntgeltRegime {
        tarifjahr: i32,
    },
}

Errors returned by the billing calculation functions.

Variants

InvalidInput

The billing input contains an invalid or inconsistent value.

Fields

reason: String

Human-readable explanation. Dynamic String so callers can include runtime context.

MonetaryOverflow

Monetary precision overflow — the calculated amount exceeds i64 range.

This can only happen for unrealistically large billing amounts (> ~92 million EUR). input_value carries the Decimal that caused the overflow so callers can log it.

Fields

input_value: Option<Decimal>

The value that caused the overflow, if available.

UnsupportedEntgeltRegime

The delivery period is governed by an Entgelt regime whose methodology cannot be computed yet.

StromNEV/GasNEV and the ARegV lapse with the end of 2028; the successor system AgNeS (GBK-25-01) is draft only — the Rahmenfestlegung is expected end-2026, and its parameter tables follow as configuration once they become binding. Refusing is deliberate: computing under the lapsed Verordnung math and merely tagging the result AgNeS would be wrong under both regimes. See crate::regulatory::RegulatoryRegime::ensure_berechenbar.

Fields

tarifjahr: i32

The calendar year whose rates the settlement would have priced.

Trait Implementations

impl Clone for BillingError

fn clone(&self) -> BillingError

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for BillingError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for BillingError

fn fmt(&self, __formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Error for BillingError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.