Better error precision on canBeSpent cases

- error precision: in case there is an error but it's not a "NotEnoughBalance" error, we display it instead
- canBeSpent(a,t)=>Promise<bool> was replaced by checkCanBeSpent(a,t)=>Promise<void> which will throw if something is wrong (NotEnoughBalance or something else!)
- cache eviction of bad error: in case such an error happen, we clear the cache to allow to always retry the call that fails
- the cache make sure it is always up to date by taking a.blockHeight

src/bridge/EthereumJSBridge.js

@@ -13,8 +13,11 @@ import { getDerivations } from 'helpers/derivations'
 import getAddressCommand from 'commands/getAddress'
 import signTransactionCommand from 'commands/signTransaction'
 import { getAccountPlaceholderName, getNewAccountPlaceholderName } from 'helpers/accountName'
+import { createCustomErrorClass } from 'helpers/errors'
 import type { EditProps, WalletBridge } from './types'
 
+const NotEnoughBalance = createCustomErrorClass('NotEnoughBalance')
+
 // TODO in future it would be neat to support eip55
 
 type Transaction = {
@@ -363,7 +366,8 @@ const EthereumBridge: WalletBridge<Transaction> = {
 
   EditAdvancedOptions,
 
-  canBeSpent: (a, t) => Promise.resolve(t.amount <= a.balance),
+  checkCanBeSpent: (a, t) =>
+    t.amount <= a.balance ? Promise.resolve() : Promise.reject(new NotEnoughBalance()),
   getTotalSpent: (a, t) => Promise.resolve(t.amount + t.gasPrice * t.gasLimit),
   getMaxAmount: (a, t) => Promise.resolve(a.balance - t.gasPrice * t.gasLimit),
 

src/bridge/LibcoreBridge.js

@@ -11,8 +11,12 @@ import libcoreSyncAccount from 'commands/libcoreSyncAccount'
 import libcoreSignAndBroadcast from 'commands/libcoreSignAndBroadcast'
 import libcoreGetFees from 'commands/libcoreGetFees'
 import libcoreValidAddress from 'commands/libcoreValidAddress'
+import { createCustomErrorClass } from 'helpers/errors'
 import type { WalletBridge, EditProps } from './types'
 
+const NOT_ENOUGH_FUNDS = 52
+const NotEnoughBalance = createCustomErrorClass('NotEnoughBalance')
+
 const notImplemented = new Error('LibcoreBridge: not implemented')
 
 type Transaction = {
@@ -65,10 +69,13 @@ const isRecipientValid = (currency, recipient) => {
 
 const feesLRU = LRU({ max: 100 })
 
+const getFeesKey = (a, t) =>
+  `${a.id}_${a.blockHeight || 0}_${t.amount}_${t.recipient}_${t.feePerByte}`
+
 const getFees = async (a, transaction) => {
   const isValid = await isRecipientValid(a.currency, transaction.recipient)
   if (!isValid) return null
-  const key = `${a.id}_${transaction.amount}_${transaction.recipient}_${transaction.feePerByte}`
+  const key = getFeesKey(a, transaction)
   let promise = feesLRU.get(key)
   if (promise) return promise
   promise = libcoreGetFees
@@ -79,6 +86,19 @@ const getFees = async (a, transaction) => {
   return promise
 }
 
+const checkCanBeSpent = (a, t) =>
+  !t.amount
+    ? Promise.resolve()
+    : getFees(a, t)
+        .then(() => {})
+        .catch(e => {
+          if (e.code === NOT_ENOUGH_FUNDS) {
+            throw new NotEnoughBalance()
+          }
+          feesLRU.del(getFeesKey(a, t))
+          throw e
+        })
+
 const LibcoreBridge: WalletBridge<Transaction> = {
   scanAccountsOnDevice(currency, devicePath) {
     return libcoreScanAccounts
@@ -173,12 +193,7 @@ const LibcoreBridge: WalletBridge<Transaction> = {
 
   isValidTransaction: (a, t) => (t.amount > 0 && t.recipient && true) || false,
 
-  canBeSpent: (a, t) =>
-    !t.amount
-      ? Promise.resolve(true)
-      : getFees(a, t)
-          .then(() => true)
-          .catch(() => false),
+  checkCanBeSpent,
 
   getTotalSpent: (a, t) =>
     !t.amount

src/bridge/RippleJSBridge.js

@@ -19,8 +19,11 @@ import {
 import FeesRippleKind from 'components/FeesField/RippleKind'
 import AdvancedOptionsRippleKind from 'components/AdvancedOptions/RippleKind'
 import { getAccountPlaceholderName, getNewAccountPlaceholderName } from 'helpers/accountName'
+import { createCustomErrorClass } from 'helpers/errors'
 import type { WalletBridge, EditProps } from './types'
 
+const NotEnoughBalance = createCustomErrorClass('NotEnoughBalance')
+
 type Transaction = {
   amount: number,
   recipient: string,
@@ -461,9 +464,12 @@ const RippleJSBridge: WalletBridge<Transaction> = {
 
   isValidTransaction: (a, t) => (t.amount > 0 && t.recipient && true) || false,
 
-  canBeSpent: async (a, t) => {
+  checkCanBeSpent: async (a, t) => {
     const r = await getServerInfo(a.endpointConfig)
-    return t.amount + t.fee + parseAPIValue(r.validatedLedger.reserveBaseXRP) <= a.balance
+    if (t.amount + t.fee + parseAPIValue(r.validatedLedger.reserveBaseXRP) <= a.balance) {
+      return
+    }
+    throw new NotEnoughBalance()
   },
 
   getTotalSpent: (a, t) => Promise.resolve(t.amount + t.fee),

src/bridge/UnsupportedBridge.js

@@ -31,7 +31,7 @@ const UnsupportedBridge: WalletBridge<*> = {
 
   getTransactionRecipient: () => '',
 
-  canBeSpent: () => Promise.resolve(false),
+  checkCanBeSpent: () => Promise.resolve(),
 
   getTotalSpent: () => Promise.resolve(0),
 

src/bridge/makeMockBridge.js

@@ -32,7 +32,7 @@ function makeMockBridge(opts?: Opts): WalletBridge<*> {
     extraInitialTransactionProps,
     getTotalSpent,
     getMaxAmount,
-    canBeSpent,
+    checkCanBeSpent,
   } = {
     ...defaultOpts,
     ...opts,
@@ -145,7 +145,7 @@ function makeMockBridge(opts?: Opts): WalletBridge<*> {
 
     isValidTransaction: (a, t) => (t.amount > 0 && t.recipient && true) || false,
 
-    canBeSpent,
+    checkCanBeSpent,
 
     getTotalSpent,
 

src/bridge/types.js

@@ -82,7 +82,7 @@ export interface WalletBridge<Transaction> {
   // render the whole advanced part of the form
   EditAdvancedOptions?: *; // React$ComponentType<EditProps<Transaction>>;
 
-  canBeSpent(account: Account, transaction: Transaction): Promise<boolean>;
+  checkCanBeSpent(account: Account, transaction: Transaction): Promise<void>;
 
   getTotalSpent(account: Account, transaction: Transaction): Promise<number>;
 

src/components/RequestAmount/index.js

@@ -21,9 +21,6 @@ import InputCurrency from 'components/base/InputCurrency'
 import Button from 'components/base/Button'
 import Box from 'components/base/Box'
 import type { State } from 'reducers'
-import { createCustomErrorClass } from 'helpers/errors'
-
-const NotEnoughBalance = createCustomErrorClass('NotEnoughBalance')
 
 const InputRight = styled(Box).attrs({
   ff: 'Rubik',
@@ -50,7 +47,7 @@ type OwnProps = {
   // left value (always the one which is returned)
   value: number,
 
-  canBeSpent: boolean,
+  canBeSpentError: ?Error,
 
   // max left value
   max: number,
@@ -141,14 +138,14 @@ export class RequestAmount extends PureComponent<Props> {
 
   renderInputs(containerProps: Object) {
     // TODO move this inlined into render() for less spaghetti
-    const { value, account, rightCurrency, getCounterValue, canBeSpent } = this.props
+    const { value, account, rightCurrency, getCounterValue, canBeSpentError } = this.props
     const right = getCounterValue(value) || 0
     const rightUnit = rightCurrency.units[0]
     // FIXME: no way InputCurrency pure can work here. inlined InputRight (should be static func?), inline containerProps object..
     return (
       <Box horizontal grow shrink>
         <InputCurrency
-          error={canBeSpent ? null : new NotEnoughBalance()}
+          error={canBeSpentError}
           containerProps={containerProps}
           defaultUnit={account.unit}
           value={value}

src/components/modals/Send/fields/AmountField.js

@@ -4,9 +4,9 @@ import Box from 'components/base/Box'
 import Label from 'components/base/Label'
 import RequestAmount from 'components/RequestAmount'
 
-class AmountField extends Component<*, { canBeSpent: boolean }> {
+class AmountField extends Component<*, { canBeSpentError: ?Error }> {
   state = {
-    canBeSpent: true,
+    canBeSpentError: null,
   }
   componentDidMount() {
     this.resync()
@@ -26,9 +26,13 @@ class AmountField extends Component<*, { canBeSpent: boolean }> {
   async resync() {
     const { account, bridge, transaction } = this.props
     const syncId = ++this.syncId
-    const canBeSpent = await bridge.canBeSpent(account, transaction)
-    if (this.syncId !== syncId) return
-    this.setState({ canBeSpent })
+    try {
+      await bridge.checkCanBeSpent(account, transaction)
+      if (this.syncId !== syncId) return
+      this.setState({ canBeSpentError: null })
+    } catch (canBeSpentError) {
+      this.setState({ canBeSpentError })
+    }
   }
 
   onChange = (amount: number) => {
@@ -38,14 +42,14 @@ class AmountField extends Component<*, { canBeSpent: boolean }> {
 
   render() {
     const { bridge, account, transaction, t } = this.props
-    const { canBeSpent } = this.state
+    const { canBeSpentError } = this.state
     return (
       <Box flow={1}>
         <Label>{t('app:send.steps.amount.amount')}</Label>
         <RequestAmount
           withMax={false}
           account={account}
-          canBeSpent={canBeSpent}
+          canBeSpentError={canBeSpentError}
           onChange={this.onChange}
           value={bridge.getTransactionAmount(account, transaction)}
         />

src/components/modals/Send/steps/01-step-amount.js

@@ -135,7 +135,9 @@ export class StepAmountFooter extends PureComponent<
     try {
       const totalSpent = await bridge.getTotalSpent(account, transaction)
       if (syncId !== this.syncId) return
-      const canBeSpent = await bridge.canBeSpent(account, transaction)
+      const canBeSpent = await bridge
+        .checkCanBeSpent(account, transaction)
+        .then(() => true, () => false)
       if (syncId !== this.syncId) return
       this.setState({ totalSpent, canBeSpent, isSyncing: false })
     } catch (err) {