feat: standardize balance memoizing speed

feat: add infura-only override for getStatus()
fix: remove coin filtering on poller
feat: add getStatus() response caching on infura

lib/constants.js

@@ -32,6 +32,11 @@ const RECEIPT = 'sms_receipt'
 
 const WALLET_SCORE_THRESHOLD = 9
 
+const BALANCE_FETCH_SPEED_MULTIPLIER = {
+  NORMAL: 1,
+  SLOW: 3
+}
+
 module.exports = {
   anonymousCustomer,
   CASSETTE_MAX_CAPACITY,
@@ -48,5 +53,6 @@ module.exports = {
   CASH_OUT_MAXIMUM_AMOUNT_OF_CASSETTES,
   WALLET_SCORE_THRESHOLD,
   RECEIPT,
-  PSQL_URL
+  PSQL_URL,
+  BALANCE_FETCH_SPEED_MULTIPLIER
 }