fiat conversion for electrum SPV provider

providers/bitcoinElectrum/providerImpl.go

@@ -58,5 +58,15 @@ func (p *Provider) GetBalances() ([]int, []string, error) {
 
 	wg.Wait()
 
-	return nil, nil, nil
+	cad, err := convertBTCToCAD(totalSats, p.coinGeckoApiKey)
+	if err != nil {
+		return nil, nil, fmt.Errorf("failed to convert sats to CAD: %v", err)
+	}
+
+	balances := make([]int, 0)
+	accounts := make([]string, 0)
+	balances = append(balances, int(cad))
+	accounts = append(accounts, p.ynabAccountID)
+
+	return balances, accounts, nil
 }