@ledgerhq/live-common/src/families/kaspa/descriptor/fees.ts

Common ground for the Ledger Live apps

import type { FeeDescriptor } from "../../../bridge/descriptor/types";
import { BigNumber } from "bignumber.js";

type KaspaNetworkInfoItem = {
  label: string;
  amount: BigNumber;
  estimatedSeconds: number;
};

export const fees: FeeDescriptor = {
  hasPresets: true,
  hasCustom: true,
  presets: {
    legend: { type: "feeRate", unit: "Sompi/byte", valueFrom: "presetAmount" },
    strategyLabelInAmount: "legend",
    getOptions: transaction => {
      const info = (transaction as Record<string, unknown>).networkInfo as
        | KaspaNetworkInfoItem[]
        | undefined;
      if (!info?.length) return [];

      const first = info[0];
      const allSame =
        first !== undefined &&
        info.every(
          (item: KaspaNetworkInfoItem) => item.estimatedSeconds === first.estimatedSeconds,
        );

      return info.map((item: KaspaNetworkInfoItem) => ({
        id: item.label,
        amount: item.amount,
        estimatedMs: item.estimatedSeconds * 1000,
        disabled: (item.label === "slow" || item.label === "medium") && allSame,
      }));
    },
  },
  custom: {
    inputs: [
      {
        key: "feePerByte",
        type: "number",
        unitLabel: "Sompi/byte",
      },
    ],
    getInitialValues: transaction => {
      const tx = transaction as {
        customFeeRate?: BigNumber;
        networkInfo?: KaspaNetworkInfoItem[];
      };
      if (BigNumber.isBigNumber(tx.customFeeRate) && tx.customFeeRate.gt(0)) {
        return { feePerByte: tx.customFeeRate.toFixed() };
      }
      const medium = tx.networkInfo?.find(item => item.label === "medium")?.amount;
      return { feePerByte: BigNumber.isBigNumber(medium) ? medium.toFixed() : "" };
    },
    buildTransactionPatch: values => {
      const feePerByte = new BigNumber(values.feePerByte);
      return {
        feesStrategy: "custom",
        customFeeRate:
          feePerByte.isNaN() || feePerByte.isNegative() ? new BigNumber(0) : feePerByte,
      };
    },
  },
};