// Copyright 2019-2021 Parity Technologies (UK) Ltd.
// This file is part of Parity Bridges Common.

// Parity Bridges Common is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// Parity Bridges Common is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with Parity Bridges Common.  If not, see <http://www.gnu.org/licenses/>.

//! Substrate relay helpers

use relay_utils::metrics::{FloatJsonValueMetric, PrometheusError, Registry};

/// Creates standalone token price metric.
pub fn token_price_metric(
	registry: &Registry,
	prefix: Option<&str>,
	token_id: &str,
) -> Result<FloatJsonValueMetric, PrometheusError> {
	FloatJsonValueMetric::new(
		registry,
		prefix,
		format!(
			"https://api.coingecko.com/api/v3/simple/price?ids={}&vs_currencies=btc",
			token_id
		),
		format!("$.{}.btc", token_id),
		format!("{}_to_base_conversion_rate", token_id.replace("-", "_")),
		format!(
			"Rate used to convert from {} to some BASE tokens",
			token_id.to_uppercase()
		),
	)
}