change Token#parentCurrency to be a Currency type

src/__tests__/helpers/currencies.js

@@ -94,8 +94,8 @@ test("tokens are correct", () => {
     expect(typeof token.name).toBe("string");
     expect(typeof token.ledgerSignature).toBe("string");
     expect(typeof token.tokenType).toBe("string");
-    expect(typeof token.parentCurrency).toBe("string");
-    expect(hasCryptoCurrencyId(token.parentCurrency)).toBe(true);
+    expect(typeof token.parentCurrency).toBe("object");
+    expect(hasCryptoCurrencyId(token.parentCurrency.id)).toBe(true);
     expect(typeof token.ticker).toBe("string");
     expect(token.units.length).toBeGreaterThan(0);
     const unit = token.units[0];

src/currencies/color.js

@@ -1,5 +1,13 @@
 // @flow
 import type { Currency } from "../types";
 
-export const getCurrencyColor = (currency: Currency) =>
-  currency.type === "CryptoCurrency" ? currency.color : "#777";
+export const getCurrencyColor = (currency: Currency) => {
+  switch (currency.type) {
+    case "CryptoCurrency":
+      return currency.color;
+    case "TokenCurrency":
+      return currency.parentCurrency.color;
+    default:
+      return "#999";
+  }
+};

src/data/tokens.js

@@ -1,8 +1,9 @@
 // @flow
 import type { TokenCurrency, CryptoCurrency } from "../types";
+import { getCryptoCurrencyById } from "../currencies";
 
 const convertERC20 = ([
-  parentCurrency,
+  parentCurrencyId,
   token,
   ticker,
   magnitude,
@@ -14,7 +15,7 @@ const convertERC20 = ([
   id: "ethereum/erc20/" + token,
   ledgerSignature,
   contractAddress,
-  parentCurrency,
+  parentCurrency: getCryptoCurrencyById(parentCurrencyId),
   tokenType: "erc20",
   name,
   ticker,
@@ -50,10 +51,10 @@ export function add(type: string, list: any[]) {
     tokensByTicker[token.ticker] = token;
     tokensByAddress[token.contractAddress.toLowerCase()] = token;
     const { parentCurrency } = token;
-    if (!(parentCurrency in tokensByCryptoCurrency)) {
-      tokensByCryptoCurrency[parentCurrency] = [];
+    if (!(parentCurrency.id in tokensByCryptoCurrency)) {
+      tokensByCryptoCurrency[parentCurrency.id] = [];
     }
-    tokensByCryptoCurrency[parentCurrency].push(token);
+    tokensByCryptoCurrency[parentCurrency.id].push(token);
   });
 }
 

src/types/currencies.js

@@ -29,7 +29,7 @@ export type TokenCurrency = CurrencyCommon & {
   ledgerSignature: string,
   contractAddress: string,
   // the currency it belongs to. e.g. 'ethereum'
-  parentCurrency: string,
+  parentCurrency: CryptoCurrency,
   // the type of token in the blockchain it belongs. e.g. 'erc20'
   tokenType: string
 };