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Fetches and applies real-time exchange rate

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Fetches the current BTC/EUR exchange rate from the CoinGecko API and uses it to calculate fiat values.

This ensures more accurate currency conversions, especially for expenses and payments. A fallback to a default rate is included in case the API is unavailable.
This commit is contained in:
padreug 2025-10-23 10:04:37 +02:00
parent 60aba90e00
commit 176501211d
1 changed files with 27 additions and 4 deletions
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31
static/js/index.js
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@ -19,6 +19,7 @@ window.app = Vue.createApp({
isSuperUser: false,
castleWalletConfigured: false,
userWalletConfigured: false,
currentExchangeRate: null, // BTC/EUR rate (sats per EUR)
expenseDialog: {
show: false,
description: '',
@ -97,7 +98,7 @@ window.app = Vue.createApp({
paymentHash: null,
checkWalletKey: null,
pollIntervalId: null,
exchangeRate: 3571.43, // sats per EUR (TODO: fetch from API)
exchangeRate: null, // Will be set from currentExchangeRate
originalCurrency: 'BTC' // Track original receivable currency
},
payUserDialog: {
@ -113,7 +114,7 @@ window.app = Vue.createApp({
reference: '',
loading: false,
paymentSuccess: false,
exchangeRate: 3571.43,
exchangeRate: null, // Will be set from currentExchangeRate
originalCurrency: 'BTC'
}
}
@ -1012,7 +1013,7 @@ window.app = Vue.createApp({
paymentHash: null,
checkWalletKey: null,
pollIntervalId: null,
exchangeRate: fiatAmount > 0 ? Math.abs(userBalance.balance) / fiatAmount : 3571.43, // Calculate rate from actual amounts
exchangeRate: fiatAmount > 0 ? Math.abs(userBalance.balance) / fiatAmount : (this.currentExchangeRate || 3571.43), // Calculate rate from actual amounts or use current rate
originalCurrency: fiatCurrency || 'BTC'
}
},
@ -1213,7 +1214,7 @@ window.app = Vue.createApp({
reference: '',
loading: false,
paymentSuccess: false,
exchangeRate: fiatAmount > 0 ? userBalance.balance / fiatAmount : 3571.43,
exchangeRate: fiatAmount > 0 ? userBalance.balance / fiatAmount : (this.currentExchangeRate || 3571.43),
originalCurrency: fiatCurrency || 'BTC'
}
},
@ -1357,6 +1358,27 @@ window.app = Vue.createApp({
return null
}
},
async loadExchangeRate() {
try {
// Fetch current BTC/EUR rate from CoinGecko API
const response = await fetch('https://api.coingecko.com/api/v3/simple/price?ids=bitcoin&vs_currencies=eur')
const data = await response.json()
if (data && data.bitcoin && data.bitcoin.eur) {
// Convert BTC/EUR to sats/EUR (1 BTC = 100,000,000 sats)
const btcPerEur = 1 / data.bitcoin.eur
this.currentExchangeRate = Math.round(btcPerEur * 100000000)
console.log('Exchange rate loaded:', this.currentExchangeRate, 'sats per EUR')
} else {
throw new Error('Invalid response from exchange rate API')
}
} catch (error) {
console.error('Error loading exchange rate:', error)
// Fallback to a reasonable default if API fails
this.currentExchangeRate = 3571.43
console.log('Using fallback exchange rate:', this.currentExchangeRate)
}
},
formatSats(amount) {
return new Intl.NumberFormat().format(amount)
},
@ -1425,6 +1447,7 @@ window.app = Vue.createApp({
// Load settings first to determine if user is super user
await this.loadSettings()
await this.loadUserWallet()
await this.loadExchangeRate()
await this.loadBalance()
await this.loadTransactions()
await this.loadAccounts()