add an action to fetch token balances

src/logic/tokens/store/actions/fetchTokenBalances.js

@@ -0,0 +1,27 @@
+// @flow
+import type { Dispatch as ReduxDispatch } from 'redux'
+import { Map, List } from 'immutable'
+import { type Token } from '~/logic/tokens/store/model/token'
+import { type GlobalState } from '~/store/index'
+import { calculateBalanceOf } from './fetchTokens'
+import { addTokens } from './saveTokens'
+
+const fetchTokenBalances = (safeAddress: string, tokens: List<Token>) => async (
+  dispatch: ReduxDispatch<GlobalState>,
+) => {
+  try {
+    const withBalances = await Promise.all(
+      tokens.map(async token => token.set('funds', await calculateBalanceOf(token.address, safeAddress))),
+    )
+    const tokensMap = Map().withMutations((map) => {
+      withBalances.forEach(token => map.set(token.address, token))
+    })
+
+    dispatch(addTokens(safeAddress, tokensMap))
+  } catch (err) {
+    // eslint-disable-next-line
+    console.error('Error while loading active tokens from storage:', err)
+  }
+}
+
+export default fetchTokenBalances

src/logic/tokens/store/actions/fetchTokens.js

@@ -34,7 +34,7 @@ export const getHumanFriendlyToken = ensureOnce(createHumanFriendlyTokenContract
 
 export const getStandardTokenContract = ensureOnce(createStandardTokenContract)
 
-export const calculateBalanceOf = async (tokenAddress: string, address: string, decimals: number) => {
+export const calculateBalanceOf = async (tokenAddress: string, address: string, decimals: number = 18) => {
   const erc20Token = await getStandardTokenContract()
   let balance = 0
 

src/logic/tokens/store/actions/loadActiveTokens.js

@@ -19,7 +19,7 @@ const loadActiveTokens = (safeAddress: string) => async (dispatch: ReduxDispatch
     }
   } catch (err) {
     // eslint-disable-next-line
-    console.error('Error while getting safes from storage:', err)
+    console.error('Error while loading active tokens from storage:', err)
   }
 }
 

src/logic/tokens/store/selectors/index.js

@@ -6,10 +6,10 @@ import { type GlobalState } from '~/store'
 import { TOKEN_REDUCER_ID } from '~/logic/tokens/store/reducer/tokens'
 import { type Token } from '~/logic/tokens/store/model/token'
 
-const balancesSelector = (state: GlobalState) => state[TOKEN_REDUCER_ID]
+const tokensStateSelector = (state: GlobalState) => state[TOKEN_REDUCER_ID]
 
 export const tokensSelector: Selector<GlobalState, RouterProps, Map<string, Token>> = createSelector(
-  balancesSelector,
+  tokensStateSelector,
   safeParamAddressSelector,
   (tokens: Map<string, Map<string, Token>>, address: string) => {
     if (!address) {
@@ -20,25 +20,34 @@ export const tokensSelector: Selector<GlobalState, RouterProps, Map<string, Toke
   },
 )
 
-export const tokenListSelector = createSelector(
+export const tokenListSelector: Selector<GlobalState, RouterProps, List<Token>> = createSelector(
   tokensSelector,
   (tokens: Map<string, Token>) => tokens.toList(),
 )
 
-export const activeTokensSelector = createSelector(
+export const activeTokensSelector: Selector<GlobalState, RouterProps, List<Token>> = createSelector(
   tokenListSelector,
   (tokens: List<Token>) => tokens.filter((token: Token) => token.get('status')),
 )
 
-export const orderedTokenListSelector = createSelector(
+export const orderedTokenListSelector: Selector<GlobalState, RouterProps, List<Token>> = createSelector(
   tokenListSelector,
   (tokens: List<Token>) => tokens.sortBy((token: Token) => token.get('symbol')),
 )
 
-export const tokenAddressesSelector = createSelector(
+export const tokenAddressesSelector: Selector<GlobalState, RouterProps, List<string>> = createSelector(
   tokenListSelector,
-  (balances: List<Token>) => {
-    const addresses = List().withMutations(list => balances.map(token => list.push(token.address)))
+  (tokens: List<Token>) => {
+    const addresses = List().withMutations(list => tokens.map(token => list.push(token.address)))
+
+    return addresses
+  },
+)
+
+export const activeTokenAdressesSelector: Selector<GlobalState, RouterProps, List<string>> = createSelector(
+  activeTokensSelector,
+  (tokens: List<Token>) => {
+    const addresses = List().withMutations(list => tokens.map(token => list.push(token.address)))
 
     return addresses
   },

src/routes/safe/container/actions.js

@@ -2,15 +2,18 @@
 import fetchSafe from '~/routes/safe/store/actions/fetchSafe'
 import { fetchTokens } from '~/logic/tokens/store/actions/fetchTokens'
 import loadActiveTokens from '~/logic/tokens/store/actions/loadActiveTokens'
+import fetchTokenBalances from '~/logic/tokens/store/actions/fetchTokenBalances'
 
 export type Actions = {
   fetchSafe: typeof fetchSafe,
   fetchTokens: typeof fetchTokens,
   loadActiveTokens: typeof loadActiveTokens,
+  fetchTokenBalances: typeof fetchTokenBalances
 }
 
 export default {
   fetchSafe,
   fetchTokens,
   loadActiveTokens,
+  fetchTokenBalances,
 }

src/routes/safe/container/index.jsx

@@ -16,21 +16,27 @@ const TIMEOUT = process.env.NODE_ENV === 'test' ? 1500 : 15000
 class SafeView extends React.PureComponent<Props> {
   componentDidMount() {
     const {
-      safeUrl, fetchTokenBalances, fetchSafe, loadActiveTokens,
+      safeUrl, fetchTokenBalances, fetchSafe, loadActiveTokens, activeTokens,
     } = this.props
 
     fetchSafe(safeUrl)
     loadActiveTokens(safeUrl)
-    // fetchTokens(safeUrl)
+
+    if (activeTokens.size) {
+      fetchTokenBalances(safeUrl, activeTokens)
+    }
 
     this.intervalId = setInterval(() => {
-      // fetchTokenBalances(safeUrl)
+      // eslint-disable-next-line
+      fetchTokenBalances(safeUrl, this.props.activeTokens)
       fetchSafe(safeUrl)
     }, TIMEOUT)
   }
 
   componentDidUpdate(prevProps) {
-    const { safe, fetchTokenBalances, loadActiveTokens } = this.props
+    const {
+      safe, fetchTokenBalances, loadActiveTokens, activeTokens,
+    } = this.props
 
     if (prevProps.safe) {
       return
@@ -39,7 +45,9 @@ class SafeView extends React.PureComponent<Props> {
     if (safe) {
       const safeAddress = safe.get('address')
       loadActiveTokens(safeAddress)
-      // fetchTokenBalances(safeAddress)
+      if (activeTokens.size) {
+        fetchTokenBalances(safeAddress, activeTokens)
+      }
     }
   }