提取

src/pages/draw/service.ts

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+import http from '@/utils/http';
+import _ from 'lodash';
+import BigNumber from 'bignumber.js';
+import { CoinDrawn, FundBasic } from '@/types/common';
+import { loadDrawCoins, storeDrawCoins } from '@/utils/storage';
+
+export async function getCoins(): Promise<CoinDrawn[]> {
+  const coinsCached = loadDrawCoins();
+  if (coinsCached && coinsCached.length) {
+    return coinsCached;
+  }
+
+  const { ok, msg, data } = await  http.get<CoinDrawn[]>('/fund/withdrawCoins');
+
+  if (!ok || !data) {
+    throw Error(msg);
+  }
+  storeDrawCoins(data);
+
+  return data;
+}
+
+export async function withdraw(
+  coin: CoinDrawn,
+  targetAddress: string,
+  amount: string,
+  password: string,
+): Promise<void> {
+  const { ok, msg } = await http.post('/fund/withdraw', {
+    coinId: coin.id,
+    targetAddress,
+    amount,
+    password,
+  });
+  if (ok) return
+  throw Error(msg);
+}
+
+export function retrieveBalance(basic?: FundBasic, coin?: CoinDrawn): string {
+  if (!basic || !coin) return '';
+  return (basic as any)[coin.label.toLocaleLowerCase()]
+}
+
+export function calcFee(coin: CoinDrawn, input: string): { fee: string, actual: string } {
+  const fail = { fee: '', actual: '' };
+  if (!coin || !input) return fail;
+  const i = new BigNumber(input);
+  const f = new BigNumber(coin.fee);
+  if (i.isNaN() || f.isNaN()) return fail;
+  const fee = i.times(f);
+  return {
+    fee: fee.decimalPlaces(2).toString(),
+    actual: i.minus(fee).decimalPlaces(2).toString(),
+  };
+}