Migrate plugins to lib directory

lib/plugins/ticker/bitpay/bitpay.js

@@ -0,0 +1,25 @@
+const axios = require('axios')
+const BN = require('../../../bn')
+
+function ticker (account, fiatCode, cryptoCode) {
+  if (cryptoCode !== 'BTC') {
+    return Promise.reject('Unsupported crypto: ' + cryptoCode)
+  }
+
+  return axios.get('https://bitpay.com/api/rates/' + fiatCode)
+  .then(r => {
+    const data = r.data
+    const price = BN(data.rate)
+    return {
+      rates: {
+        ask: price,
+        bid: price
+      }
+    }
+  })
+}
+
+module.exports = {
+  ticker,
+  name: 'BitPay'
+}