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Merge pull request #5659 from MetaMask/token-rates-bugfix

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token-rates - protect against bad token data
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kumavis 2018-11-03 21:57:21 -04:00 committed by GitHub
commit 14852669ac
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1 changed files with 7 additions and 4 deletions
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11
app/scripts/controllers/token-rates.js
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@ -1,5 +1,5 @@
const ObservableStore = require('obs-store')
const { warn } = require('loglevel')
const log = require('loglevel')
// By default, poll every 3 minutes
const DEFAULT_INTERVAL = 180 * 1000
@ -26,8 +26,11 @@ class TokenRatesController {
async updateExchangeRates () {
if (!this.isActive) { return }
const contractExchangeRates = {}
for (const i in this._tokens) {
const address = this._tokens[i].address
// copy array to ensure its not modified during iteration
const tokens = this._tokens.slice()
for (const token of tokens) {
if (!token) return log.error(`TokenRatesController - invalid tokens state:\n${JSON.stringify(tokens, null, 2)}`)
const address = token.address
contractExchangeRates[address] = await this.fetchExchangeRate(address)
}
this.store.putState({ contractExchangeRates })
@ -44,7 +47,7 @@ class TokenRatesController {
const json = await response.json()
return json && json.length ? json[0].averagePrice : 0
} catch (error) {
warn(`MetaMask - TokenRatesController exchange rate fetch failed for ${address}.`, error)
log.warn(`MetaMask - TokenRatesController exchange rate fetch failed for ${address}.`, error)
return 0
}
}