feat(cli): use ticker format for addpair

This modifies the `addpair` command to use the trading pair ticker
format such as LTC/BTC used in different commands, while keeping the
ability to specify currencies separately.

Related issue #1521.

lib/cli/commands/addpair.ts

@@ -1,25 +1,43 @@
-import { Arguments } from 'yargs';
-import { callback, loadXudClient } from '../command';
+import { Arguments, CommandBuilder } from 'yargs';
 import { AddPairRequest } from '../../proto/xudrpc_pb';
+import { callback, loadXudClient } from '../command';
 
-export const command = 'addpair <base_currency> <quote_currency>';
+export const command = 'addpair <pair>';
 
 export const describe = 'add a trading pair';
 
-export const builder = {
+export const builder: CommandBuilder = {
+  pair: {
+    description: 'the trading pair in ticker format such as LTC/BTC',
+    type: 'string',
+  },
   base_currency: {
     description: 'the currency bought and sold for this trading pair',
     type: 'string',
+    alias: 'b',
   },
   quote_currency: {
     description: 'the currency used to quote a price',
     type: 'string',
+    alias: 'q',
   },
 };
 
 export const handler = async (argv: Arguments<any>) => {
   const request = new AddPairRequest();
-  request.setBaseCurrency(argv.base_currency.toUpperCase());
-  request.setQuoteCurrency(argv.quote_currency.toUpperCase());
+  let baseCurrency: string;
+  let quoteCurrency: string;
+  if (argv.pair) {
+    if (argv.base_currency || argv.quote_currency) {
+      console.error('cannot specify both pair and base or quote currency');
+      process.exit(1);
+    }
+    [baseCurrency, quoteCurrency] = argv.pair.split('/');
+  } else {
+    baseCurrency = argv.base_currency;
+    quoteCurrency = argv.quote_currency;
+  }
+  request.setBaseCurrency(baseCurrency.toUpperCase());
+  request.setQuoteCurrency(quoteCurrency.toUpperCase());
   (await loadXudClient(argv)).addPair(request, callback(argv));
 };