@polkadot/types/interfaces#WeightToFeeCoefficient TypeScript Examples

The following examples show how to use @polkadot/types/interfaces#WeightToFeeCoefficient. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example #1
Source File: useWeightFee.ts    From subscan-multisig-react with Apache License 2.0 6 votes vote down vote up 
export function useWeightFee(weight: BN | number, apiOverride?: ApiPromise | null): BN {
  const { api } = useApi();

  return useMemo(
    () =>
      isUndefined(apiOverride) || apiOverride
        ? (((apiOverride || api).consts.transactionPayment?.weightToFee as unknown as any[]) || []).reduce(
            (acc, { coeffFrac, coeffInteger, degree, negative }: WeightToFeeCoefficient): BN => {
              const w = bnToBn(weight).pow(degree);
              const frac = coeffFrac.mul(w).div(BN_BILLION);
              const integer = coeffInteger.mul(w);

              if (negative.isTrue) {
                acc.isub(frac);
                acc.isub(integer);
              } else {
                acc.iadd(frac);
                acc.iadd(integer);
              }

              return acc;
            },
            new BN(0)
          )
        : BN_ZERO,
    [api, apiOverride, weight]
  );
}