message: chore(orign-backend-core): allow string smart meter reads
diff: @@ -18,7 +18,7 @@ export type ExternalDeviceIdType = Pick<IExternalDeviceId, 'type'> & {
  };
  export interface ISmartMeterRead {
  - meterReading: BigNumber;
  + meterReading: BigNumber | string;
  timestamp: number;
  }
  