Refactor Fiat Plugin enterAmount API

src/plugins/gui/amountQuotePlugin.ts

@@ -12,7 +12,7 @@ import { getTokenId } from '../../util/CurrencyInfoHelpers'
 import { fetchInfo } from '../../util/network'
 import { logEvent } from '../../util/tracking'
 import { fuzzyTimeout } from '../../util/utils'
-import { FiatPlugin, FiatPluginFactory, FiatPluginFactoryArgs, FiatPluginGetMethodsResponse, FiatPluginStartParams } from './fiatPluginTypes'
+import { FiatPlugin, FiatPluginFactory, FiatPluginFactoryArgs, FiatPluginStartParams } from './fiatPluginTypes'
 import { FiatProvider, FiatProviderAssetMap, FiatProviderGetQuoteParams, FiatProviderQuote } from './fiatProviderTypes'
 import { createStore, getBestError, getRateFromQuote } from './pluginUtils'
 import { banxaProvider } from './providers/banxaProvider'
@@ -139,6 +139,7 @@ export const amountQuoteFiatPlugin: FiatPluginFactory = async (params: FiatPlugi
       let counter = 0
       let bestQuote: FiatProviderQuote | undefined
       let goodQuotes: FiatProviderQuote[] = []
+      let lastSourceFieldNum: number
 
       // HACK: Force EUR for sepa Bity, since Bity doesn't accept USD, a common
       // wallet fiat selection regardless of region.
@@ -147,26 +148,37 @@ export const amountQuoteFiatPlugin: FiatPluginFactory = async (params: FiatPlugi
       const displayFiatCurrencyCode = fiatCurrencyCode.replace('iso:', '')
       const isBuy = direction === 'buy'
 
-      let enterAmountMethods: FiatPluginGetMethodsResponse
+      logEvent(isBuy ? 'Buy_Quote' : 'Sell_Quote')
+
       // Navigate to scene to have user enter amount
       showUi.enterAmount({
         headerTitle: isBuy ? sprintf(lstrings.fiat_plugin_buy_currencycode, currencyCode) : sprintf(lstrings.fiat_plugin_sell_currencycode_s, currencyCode),
-        isBuy,
+        initState: {
+          value1: '500'
+        },
         label1: sprintf(lstrings.fiat_plugin_amount_currencycode, displayFiatCurrencyCode),
         label2: sprintf(lstrings.fiat_plugin_amount_currencycode, currencyCode),
-        initialAmount1: '500',
-        getMethods: (methods: FiatPluginGetMethodsResponse) => {
-          enterAmountMethods = methods
-        },
-        convertValue: async (sourceFieldNum: number, value: string): Promise<string | undefined> => {
+        async onChangeText() {},
+        async onFieldChange(event) {
+          const { stateManager } = event
+          const { sourceFieldNum, value } = event.value
           if (!isValidInput(value)) {
-            if (enterAmountMethods != null)
-              enterAmountMethods.setStatusText({ statusText: lstrings.create_wallet_invalid_input, options: { textType: 'error' } })
+            stateManager.update({ statusText: { content: lstrings.create_wallet_invalid_input, textType: 'error' } })
             return
           }
           bestQuote = undefined
           goodQuotes = []
-          if (eq(value, '0')) return ''
+          lastSourceFieldNum = sourceFieldNum
+
+          const otherFieldKey = sourceFieldNum === 1 ? 'value2' : 'value1'
+          const spinnerKey = sourceFieldNum === 1 ? 'spinner2' : 'spinner1'
+
+          stateManager.update({ [spinnerKey]: true })
+
+          if (eq(value, '0')) {
+            stateManager.update({ [otherFieldKey]: '', [spinnerKey]: false })
+            return
+          }
           const myCounter = ++counter
           let quoteParams: FiatProviderGetQuoteParams
           let sourceFieldCurrencyCode
@@ -220,76 +232,77 @@ export const amountQuoteFiatPlugin: FiatPluginFactory = async (params: FiatPlugi
           if (goodQuotes.length === 0) {
             // Find the best error to surface
             const bestErrorText = getBestError(errors as any, sourceFieldCurrencyCode) ?? lstrings.fiat_plugin_buy_no_quote
-            if (enterAmountMethods != null) enterAmountMethods.setStatusText({ statusText: bestErrorText, options: { textType: 'error' } })
+            stateManager.update({ statusText: { content: bestErrorText, textType: 'error' }, [spinnerKey]: false })
             return
           }
 
           // Find best quote factoring in pluginPriorities
           bestQuote = getBestQuote(goodQuotes, priorityArray ?? [{}])
           if (bestQuote == null) {
-            if (enterAmountMethods != null) enterAmountMethods.setStatusText({ statusText: lstrings.fiat_plugin_buy_no_quote, options: { textType: 'error' } })
+            stateManager.update({ statusText: { content: lstrings.fiat_plugin_buy_no_quote, textType: 'error' }, [spinnerKey]: false })
             return
           }
 
           const exchangeRateText = getRateFromQuote(bestQuote, displayFiatCurrencyCode)
-          if (enterAmountMethods != null) {
-            const poweredByOnClick = async () => {
-              // 1. Show modal with all the valid quotes
-              const items = goodQuotes.map(quote => {
-                let text
-                if (sourceFieldNum === 1) {
-                  // User entered a fiat value. Show the crypto value per partner
-                  const localeAmount = formatNumber(toFixed(quote.cryptoAmount, 0, 6))
-                  text = `(${localeAmount} ${quote.displayCurrencyCode})`
-                } else {
-                  // User entered a crypto value. Show the fiat value per partner
-                  const localeAmount = formatNumber(toFixed(quote.fiatAmount, 0, 2))
-                  text = `(${localeAmount} ${quote.fiatCurrencyCode.replace('iso:', '')})`
-                }
-                const out = {
-                  text,
-                  name: quote.pluginDisplayName,
-                  icon: getPartnerIconUri(quote.partnerIcon)
-                }
-                return out
-              })
-              const rowName = await showUi.listModal({
-                title: 'Providers',
-                selected: bestQuote?.pluginDisplayName ?? '',
-                items
-              })
-              if (bestQuote == null) return
-
-              // 2. Set the best quote to the one chosen by user (if any is chosen)
-              if (rowName != null && rowName !== bestQuote.pluginDisplayName) {
-                bestQuote = goodQuotes.find(quote => quote.pluginDisplayName === rowName)
-                if (bestQuote == null) return
-
-                // 3. Set the status text and powered by
-                const statusText = getRateFromQuote(bestQuote, displayFiatCurrencyCode)
-                enterAmountMethods.setStatusText({ statusText })
-                enterAmountMethods.setPoweredBy({ poweredByText: bestQuote.pluginDisplayName, poweredByIcon: bestQuote.partnerIcon, poweredByOnClick })
-
-                logEvent(isBuy ? 'Buy_Quote_Change_Provider' : 'Sell_Quote_Change_Provider')
-
-                if (sourceFieldNum === 1) {
-                  enterAmountMethods.setValue2(bestQuote.cryptoAmount)
-                } else {
-                  enterAmountMethods.setValue1(bestQuote.fiatAmount)
-                }
-              }
+          stateManager.update({
+            statusText: { content: exchangeRateText },
+            poweredBy: { poweredByText: bestQuote.pluginDisplayName, poweredByIcon: bestQuote.partnerIcon },
+            [otherFieldKey]: sourceFieldNum === 1 ? toFixed(bestQuote.cryptoAmount, 0, 6) : toFixed(bestQuote.fiatAmount, 0, 2),
+            [spinnerKey]: false
+          })
+        },
+        async onPoweredByClick(event) {
+          const { stateManager } = event
+          // 1. Show modal with all the valid quotes
+          const items = goodQuotes.map(quote => {
+            let text
+            if (lastSourceFieldNum === 1) {
+              // User entered a fiat value. Show the crypto value per partner
+              const localeAmount = formatNumber(toFixed(quote.cryptoAmount, 0, 6))
+              text = `(${localeAmount} ${quote.displayCurrencyCode})`
+            } else {
+              // User entered a crypto value. Show the fiat value per partner
+              const localeAmount = formatNumber(toFixed(quote.fiatAmount, 0, 2))
+              text = `(${localeAmount} ${quote.fiatCurrencyCode.replace('iso:', '')})`
+            }
+            const out = {
+              text,
+              name: quote.pluginDisplayName,
+              icon: getPartnerIconUri(quote.partnerIcon)
+            }
+            return out
+          })
+          const rowName = await showUi.listModal({
+            title: 'Providers',
+            selected: bestQuote?.pluginDisplayName ?? '',
+            items
+          })
+          if (bestQuote == null) return
+
+          // 2. Set the best quote to the one chosen by user (if any is chosen)
+          if (rowName != null && rowName !== bestQuote.pluginDisplayName) {
+            bestQuote = goodQuotes.find(quote => quote.pluginDisplayName === rowName)
+            if (bestQuote == null) return
+
+            // 3. Set the status text and powered by
+            const statusText = getRateFromQuote(bestQuote, displayFiatCurrencyCode)
+            stateManager.update({
+              statusText: { content: statusText },
+              poweredBy: { poweredByText: bestQuote.pluginDisplayName, poweredByIcon: bestQuote.partnerIcon }
+            })
+
+            logEvent(isBuy ? 'Buy_Quote_Change_Provider' : 'Sell_Quote_Change_Provider')
+
+            if (lastSourceFieldNum === 1) {
+              stateManager.update({ value2: bestQuote.cryptoAmount })
+            } else {
+              stateManager.update({ value1: bestQuote.fiatAmount })
             }
-
-            enterAmountMethods.setStatusText({ statusText: exchangeRateText })
-            enterAmountMethods.setPoweredBy({ poweredByText: bestQuote.pluginDisplayName, poweredByIcon: bestQuote.partnerIcon, poweredByOnClick })
-          }
-          if (sourceFieldNum === 1) {
-            return toFixed(bestQuote.cryptoAmount, 0, 6)
-          } else {
-            return toFixed(bestQuote.fiatAmount, 0, 2)
           }
         },
         async onSubmit() {
+          logEvent(isBuy ? 'Buy_Quote_Next' : 'Sell_Quote_Next')
+
           if (bestQuote == null) {
             return
           }

src/plugins/gui/fiatPlugin.tsx

@@ -12,13 +12,10 @@ import { SendScene2Params } from '../../components/scenes/SendScene2'
 import { Airship, showError, showToastSpinner } from '../../components/services/AirshipInstance'
 import { HomeAddress, SepaInfo } from '../../types/FormTypes'
 import { GuiPlugin } from '../../types/GuiPluginTypes'
-import { NavigationBase } from '../../types/routerTypes'
-import { logEvent } from '../../util/tracking'
+import { AppParamList, NavigationBase } from '../../types/routerTypes'
 import {
   FiatPaymentType,
   FiatPluginAddressFormParams,
-  FiatPluginEnterAmountParams,
-  FiatPluginEnterAmountResponse,
   FiatPluginListModalParams,
   FiatPluginRegionCode,
   FiatPluginSepaFormParams,
@@ -39,7 +36,6 @@ export const executePlugin = async (params: {
 }): Promise<void> => {
   const { disablePlugins = {}, account, direction, guiPlugin, navigation, paymentType, providerId, regionCode } = params
   const { pluginId } = guiPlugin
-  const isBuy = direction === 'buy'
 
   const showUi: FiatPluginUi = {
     showToastSpinner,
@@ -62,23 +58,8 @@ export const executePlugin = async (params: {
       ))
       return result
     },
-    enterAmount(params: FiatPluginEnterAmountParams) {
-      const { headerTitle, label1, label2, initialAmount1, convertValue, getMethods, onSubmit } = params
-      logEvent(isBuy ? 'Buy_Quote' : 'Sell_Quote')
-
-      navigation.navigate('guiPluginEnterAmount', {
-        headerTitle,
-        label1,
-        label2,
-        initialAmount1,
-        getMethods,
-        convertValue,
-        onChangeText: async () => undefined,
-        onSubmit: async (value: FiatPluginEnterAmountResponse) => {
-          logEvent(isBuy ? 'Buy_Quote_Next' : 'Sell_Quote_Next')
-          onSubmit(value)
-        }
-      })
+    enterAmount(params: AppParamList['guiPluginEnterAmount']) {
+      navigation.navigate('guiPluginEnterAmount', params)
     },
     addressForm: async (params: FiatPluginAddressFormParams) => {
       const { countryCode, headerTitle, headerIconUri, onSubmit } = params
@@ -132,7 +113,7 @@ export const executePlugin = async (params: {
         })
       })
     },
-    popScene: async () => {
+    exitScene: async () => {
       navigation.pop()
     }
   }

src/plugins/gui/fiatPluginTypes.ts

@@ -5,8 +5,9 @@ import { DisablePluginMap } from '../../actions/ExchangeInfoActions'
 import { SendScene2Params } from '../../components/scenes/SendScene2'
 import { HomeAddress, SepaInfo } from '../../types/FormTypes'
 import { GuiPlugin } from '../../types/GuiPluginTypes'
+import { AppParamList } from '../../types/routerTypes'
 import { EdgeTokenId } from '../../types/types'
-import { EnterAmountPoweredBy } from './scenes/FiatPluginEnterAmountScene'
+import { StateManager } from './hooks/useStateManager'
 
 export const asFiatDirection = asValue('buy', 'sell')
 export type FiatDirection = ReturnType<typeof asFiatDirection>
@@ -21,25 +22,6 @@ export interface FiatPluginAddressFormParams {
   onSubmit: (homeAddress: HomeAddress) => Promise<void>
 }
 
-export interface FiatPluginGetMethodsResponse {
-  setStatusText: (params: { statusText: string; options?: { textType?: 'warning' | 'error' } }) => void
-  setPoweredBy: (params: EnterAmountPoweredBy) => void
-  setValue1: (value: string) => void
-  setValue2: (value: string) => void
-}
-
-export interface FiatPluginEnterAmountParams {
-  headerTitle: string
-  isBuy: boolean
-  label1: string
-  label2: string
-  convertValue: (sourceFieldNum: number, value: string) => Promise<string | undefined>
-  onSubmit: (value: FiatPluginEnterAmountResponse) => Promise<void>
-  getMethods?: (methods: FiatPluginGetMethodsResponse) => void
-  initialAmount1?: string
-  headerIconUri?: string
-}
-
 export interface FiatPluginSepaFormParams {
   headerTitle: string
   headerIconUri?: string
@@ -97,11 +79,11 @@ export interface FiatPluginUi {
   }>
   showError: (error: Error) => Promise<void>
   listModal: (params: FiatPluginListModalParams) => Promise<string | undefined>
-  enterAmount: (params: FiatPluginEnterAmountParams) => void
+  enterAmount: (params: AppParamList['guiPluginEnterAmount']) => void
   addressForm: (params: FiatPluginAddressFormParams) => Promise<HomeAddress>
   sepaForm: (params: FiatPluginSepaFormParams) => Promise<SepaInfo>
   sepaTransferInfo: (params: FiatPluginSepaTransferParams) => Promise<void>
-  popScene: () => {}
+  exitScene: () => {}
   send: (params: SendScene2Params) => Promise<void>
   // showWebView: (params: { webviewUrl: string }) => Promise<void>
 }
@@ -133,3 +115,8 @@ export interface FiatPlugin {
 }
 
 export type FiatPluginFactory = (params: FiatPluginFactoryArgs) => Promise<FiatPlugin>
+
+export interface StatefulSceneEvent<EventValue, State extends object> {
+  value: EventValue
+  stateManager: StateManager<State>
+}

src/plugins/gui/hooks/useStateManager.ts

@@ -0,0 +1,31 @@
+import { useRef } from 'react'
+
+import { useHandler } from '../../../hooks/useHandler'
+import { useState } from '../../../types/reactHooks'
+
+export class StateManager<State extends object> {
+  private _state: State
+  private readonly onUpdate: (state: State) => void
+
+  constructor(state: State, onUpdate: (state: State) => void) {
+    this._state = state
+    this.onUpdate = onUpdate
+  }
+
+  get state(): State {
+    return this._state
+  }
+
+  update(state: Partial<State>): void {
+    this._state = { ...this._state, ...state }
+    this.onUpdate(this._state)
+  }
+}
+
+export const useStateManager = <T extends object>(defaultState: T): StateManager<T> => {
+  const [state, setState] = useState<T>(defaultState)
+  const handleUpdate: StateManager<T>['update'] = useHandler((state: Partial<T>) => setState({ ...stateManagerRef.current.state, ...state }))
+  const stateManagerRef = useRef<StateManager<T>>(new StateManager(state, handleUpdate))
+
+  return stateManagerRef.current
+}

src/plugins/gui/providers/bityProvider.ts

@@ -441,7 +441,7 @@ export const bityProvider: FiatProviderFactory = {
                   await completeSellOrder(approveQuoteRes, coreWallet, showUi)
                 }
 
-                showUi.popScene()
+                showUi.exitScene()
               }
             })
           },
@@ -522,7 +522,7 @@ const completeBuyOrder = async (approveQuoteRes: BityApproveQuoteResponse, showU
       }
     },
     onDone: async () => {
-      showUi.popScene()
+      showUi.exitScene()
     }
   })
 }