Fix default fiat amounts for light accounts being over limit for non-…

…usd fiats

CHANGELOG.md

@@ -22,6 +22,11 @@
 - fixed: Round Kado-provided amounts during sell
 - fixed: "Contacts Access" setting could be out of sync with the OS-level contacts access setting
 
+## 4.14.1
+
+- changed: More informative buy amount limit errors for light accounts
+- fixed: Default buy amounts for light accounts can potentially be over limit for non-USD currencies
+
 ## 4.14.0
 
 - added: `ExpandableList` component, replacing the address hint dropdown in `AddressFormScene`

src/locales/en_US.ts

@@ -1458,7 +1458,7 @@ const strings = {
   fiat_plugin_sell_failed_try_again: 'Sell order failed. Please try again.',
   fiat_plugin_sell_failed_to_send_try_again: 'Failed to send funds for sell transaction. Please try again.',
   fiat_plugin_cannot_continue_camera_permission: 'Cannot continue. Camera permission needed for ID verifications',
-  fiat_plugin_purchase_limit_error: 'Please create a full account to increase the purchase limit',
+  fiat_plugin_purchase_limit_error_2s: 'Please create a full account to increase the purchase limit above %1$s %2$s',
   fiat_plugin_max_buy_quote_error: 'Provider cannot create max buy quote',
   fiat_plugin_max_sell_quote_error: 'Provider cannot create max sell quote',
   fiat_plugin_max_sell_quote_error_1s: 'Cannot create max sell quote for %1$s',

src/locales/strings/enUS.json

@@ -1289,7 +1289,7 @@
   "fiat_plugin_sell_failed_try_again": "Sell order failed. Please try again.",
   "fiat_plugin_sell_failed_to_send_try_again": "Failed to send funds for sell transaction. Please try again.",
   "fiat_plugin_cannot_continue_camera_permission": "Cannot continue. Camera permission needed for ID verifications",
-  "fiat_plugin_purchase_limit_error": "Please create a full account to increase the purchase limit",
+  "fiat_plugin_purchase_limit_error_2s": "Please create a full account to increase the purchase limit above %1$s %2$s",
   "fiat_plugin_max_buy_quote_error": "Provider cannot create max buy quote",
   "fiat_plugin_max_sell_quote_error": "Provider cannot create max sell quote",
   "fiat_plugin_max_sell_quote_error_1s": "Cannot create max sell quote for %1$s",

src/plugins/gui/amountQuotePlugin.ts

@@ -1,4 +1,4 @@
-import { div, eq, gt, mul, round, toFixed } from 'biggystring'
+import { div, eq, gt, round, toFixed } from 'biggystring'
 import { asNumber, asObject } from 'cleaners'
 import { sprintf } from 'sprintf-js'
 
@@ -61,6 +61,28 @@ const MAX_QUOTE_VALUE = '10000000000'
 
 const NO_PROVIDER_TOAST_DURATION_MS = 10000
 
+/** Pick a default fiat amount in the foreign fiat amount that is roughly equal
+ to the default USD fiat amount. Prioritizes rounding up/down to a nice looking
+ whole number. */
+async function getInitialFiatValue(startingFiatAmount: string, isoFiatCurrencyCode: string) {
+  let initialValue1: string | undefined
+  if (isoFiatCurrencyCode !== 'iso:USD') {
+    const isoNow = new Date().toISOString()
+    const ratePair = `${isoFiatCurrencyCode}_iso:USD`
+    const rate = await getHistoricalRate(ratePair, isoNow)
+    initialValue1 = div(startingFiatAmount, String(rate), DECIMAL_PRECISION)
+
+    // Round out all decimals
+    initialValue1 = round(initialValue1, 0)
+
+    // Keep only the first decimal place
+    initialValue1 = round(initialValue1, initialValue1.length - 1)
+  } else {
+    initialValue1 = startingFiatAmount
+  }
+  return initialValue1
+}
+
 export const amountQuoteFiatPlugin: FiatPluginFactory = async (params: FiatPluginFactoryArgs) => {
   const { account, guiPlugin, longPress = false, pluginUtils, showUi } = params
   const { pluginId } = guiPlugin
@@ -225,31 +247,15 @@ export const amountQuoteFiatPlugin: FiatPluginFactory = async (params: FiatPlugi
       let goodQuotes: FiatProviderQuote[] = []
       let lastSourceFieldNum: number
 
-      const fiatCurrencyCode = forceFiatCurrencyCode ?? defaultIsoFiat
-      const displayFiatCurrencyCode = removeIsoPrefix(fiatCurrencyCode)
+      const isoFiatCurrencyCode = forceFiatCurrencyCode ?? defaultIsoFiat
+      const displayFiatCurrencyCode = removeIsoPrefix(isoFiatCurrencyCode)
       const isBuy = direction === 'buy'
       const disableInput = requireCrypto ? 1 : requireFiat ? 2 : undefined
 
       logEvent(isBuy ? 'Buy_Quote' : 'Sell_Quote')
 
-      // Pick a default fiat amount in the foreign fiat amount that is roughly
-      // equal to the default USD fiat amount
-      let initialValue1: string | undefined
       const startingFiatAmount = isLightAccount ? DEFAULT_FIAT_AMOUNT_LIGHT_ACCOUNT : defaultFiatAmount ?? DEFAULT_FIAT_AMOUNT
-      if (displayFiatCurrencyCode !== 'USD' && defaultFiatAmount == null) {
-        const isoFiatCurrencyCode = `iso:${displayFiatCurrencyCode}`
-        const isoNow = new Date().toISOString()
-        const ratePair = `${isoFiatCurrencyCode}_iso:USD`
-        const rate = await getHistoricalRate(ratePair, isoNow)
-        initialValue1 = div(startingFiatAmount, String(rate), DECIMAL_PRECISION)
-        // Round out a decimals
-        initialValue1 = round(initialValue1, 0)
-
-        // Only leave the first decimal
-        initialValue1 = round(initialValue1, initialValue1.length - 1)
-      } else {
-        initialValue1 = requireCrypto ? undefined : startingFiatAmount
-      }
+      const initialValue1 = requireCrypto ? undefined : await getInitialFiatValue(startingFiatAmount, isoFiatCurrencyCode)
 
       // Navigate to scene to have user enter amount
       const enterAmount: InternalFiatPluginEnterAmountParams = {
@@ -382,7 +388,7 @@ export const amountQuoteFiatPlugin: FiatPluginFactory = async (params: FiatPlugi
               pluginUtils,
               tokenId,
               exchangeAmount: value,
-              fiatCurrencyCode,
+              fiatCurrencyCode: isoFiatCurrencyCode,
               amountType: 'fiat',
               direction,
               paymentTypes,
@@ -398,7 +404,7 @@ export const amountQuoteFiatPlugin: FiatPluginFactory = async (params: FiatPlugi
               pluginUtils,
               tokenId,
               exchangeAmount: value,
-              fiatCurrencyCode,
+              fiatCurrencyCode: isoFiatCurrencyCode,
               amountType: 'crypto',
               direction,
               paymentTypes,
@@ -513,12 +519,15 @@ export const amountQuoteFiatPlugin: FiatPluginFactory = async (params: FiatPlugi
           // Restrict light accounts from buying more than $50 at a time
           if (isLightAccount && isBuy) {
             const quoteFiatCurrencyCode = bestQuote.fiatCurrencyCode
-            const quoteFiatRate =
-              quoteFiatCurrencyCode === 'iso:USD' ? '1' : (await getHistoricalRate(`${quoteFiatCurrencyCode}_iso:USD`, new Date().toISOString())).toString()
-            const quoteDollarValue = mul(bestQuote.fiatAmount, quoteFiatRate)
+            const maxAmount = await getInitialFiatValue(startingFiatAmount, isoFiatCurrencyCode)
 
-            if (gt(quoteDollarValue, '50')) {
-              stateManager.update({ statusText: { content: lstrings.fiat_plugin_purchase_limit_error, textType: 'error' } })
+            if (gt(bestQuote.fiatAmount, maxAmount)) {
+              stateManager.update({
+                statusText: {
+                  content: sprintf(lstrings.fiat_plugin_purchase_limit_error_2s, maxAmount, removeIsoPrefix(quoteFiatCurrencyCode)),
+                  textType: 'error'
+                }
+              })
               return
             }
           }