small update to dynamic token request to prevent caching issues

app/core/nep5.js

@@ -4,12 +4,20 @@ import axios from 'axios'
 
 import { toBigNumber } from './math'
 import { COIN_DECIMAL_LENGTH } from './formatters'
-import { TOKENS, TOKENS_TEST, MAIN_NETWORK_ID, TEST_NETWORK_ID } from './constants'
+import {
+  TOKENS,
+  TOKENS_TEST,
+  MAIN_NETWORK_ID,
+  TEST_NETWORK_ID
+} from './constants'
 
 let fetchedTokens
 
 export const adjustDecimalAmountForTokenTransfer = (value: string): string =>
-  toBigNumber(value).times(10 ** COIN_DECIMAL_LENGTH).round().toNumber()
+  toBigNumber(value)
+    .times(10 ** COIN_DECIMAL_LENGTH)
+    .round()
+    .toNumber()
 
 const getTokenEntry = ((): Function => {
   let id = 1
@@ -25,22 +33,38 @@ const getTokenEntry = ((): Function => {
 
 export const getDefaultTokens = async (): Promise<Array<TokenItemType>> => {
   const tokens = []
-
   // Prevent duplicate requests here
   if (!fetchedTokens) {
-    axios.get('https://raw.githubusercontent.com/CityOfZion/neo-tokens/master/tokenList.json')
-      .then(response => {
-        fetchedTokens = response.data
-      })
+    const response = await axios
+      // use a time stamp query param to prevent caching
+      .get(
+        `https://raw.githubusercontent.com/CityOfZion/neo-tokens/master/tokenList.json?timestamp=${new Date().getTime()}`
+      )
       .catch(error => {
         console.error('Falling back to hardcoded list of NEP5 tokens!', error)
         // if request to gh fails use hardcoded list
         fetchedTokens = TOKENS
       })
+    if (response && response.data) {
+      fetchedTokens = response.data
+    }
   }
 
-  tokens.push(...map(fetchedTokens, (tokenData) => getTokenEntry(tokenData.symbol, tokenData.networks['1'].hash, MAIN_NETWORK_ID)))
-  tokens.push(...map(TOKENS_TEST, (scriptHash, symbol) => getTokenEntry(symbol, scriptHash, TEST_NETWORK_ID)))
+  tokens.push(
+    ...map(fetchedTokens, tokenData =>
+      getTokenEntry(
+        tokenData.symbol,
+        tokenData.networks['1'].hash,
+        MAIN_NETWORK_ID,
+        tokenData.image
+      )
+    )
+  )
+  tokens.push(
+    ...map(TOKENS_TEST, (scriptHash, symbol) =>
+      getTokenEntry(symbol, scriptHash, TEST_NETWORK_ID)
+    )
+  )
 
   return tokens
 }