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use framenode_runtime::{
opaque::{Block, BlockId},
ResolveTime, Symbol,
};
use oracle_proxy_rpc::OracleProxyRuntimeApi;
use prometheus_endpoint::{register, Gauge, Opts, PrometheusError, Registry, U64};
use sp_api::ProvideRuntimeApi;
use sp_blockchain::HeaderBackend;
use sp_runtime::traits::Block as BlockT;
use std::collections::BTreeMap;
use std::sync::Arc;
const MILLISECS_MULTIPLIER: u128 = 1_000;
#[derive(PartialEq)]
enum SymbolStatus {
Outdated,
UpToDate,
InvalidTime,
}
pub struct Metrics<C> {
pub client: Arc<C>,
pub registry: Arc<Registry>,
pub outdated_symbols: Gauge<U64>,
pub invalid_symbols: Gauge<U64>,
pub symbols_update_timestamps: BTreeMap<String, Gauge<U64>>,
pub period: std::time::Duration,
}
impl<C> Metrics<C>
where
Block: BlockT,
C: ProvideRuntimeApi<Block> + HeaderBackend<Block> + Send + Sync + 'static,
C::Api: OracleProxyRuntimeApi<Block, Symbol, ResolveTime>,
{
pub fn register(
registry: Arc<Registry>,
client: Arc<C>,
period: std::time::Duration,
) -> Result<Self, PrometheusError> {
let outdated_symbols = register(
Gauge::new("data_feed_outdated_symbols", "Number of outdated symbols")?,
®istry,
)?;
let invalid_symbols = register(
Gauge::new(
"data_feed_invalid_symbols",
"Number of symbols with invalid timestamp",
)?,
®istry,
)?;
Ok(Self {
client,
registry,
outdated_symbols,
invalid_symbols,
symbols_update_timestamps: BTreeMap::new(),
period,
})
}
async fn get_symbols(&self) -> Result<BTreeMap<String, (SymbolStatus, u64)>, String> {
let api = self.client.runtime_api();
let at = BlockId::hash(self.client.info().best_hash);
let enabled_symbols = api
.list_enabled_symbols(&at)
.map_err(|rpc_error| format!("RPC error: {:?}", rpc_error))?
.map_err(|dispatch_error| format!("Dispatch error: {:?}", dispatch_error))?;
let outdated_threshold: u128 = 300 * MILLISECS_MULTIPLIER; let now = std::time::SystemTime::now()
.duration_since(std::time::UNIX_EPOCH)
.expect("Time went backwards")
.as_millis();
let enabled_symbols_info = enabled_symbols
.iter()
.map(|(symbol, last_updated)| {
let last_updated_timestamp = (*last_updated as u128) * MILLISECS_MULTIPLIER;
let current_status = now.checked_sub(last_updated_timestamp).map_or_else(
|| SymbolStatus::InvalidTime,
|current_period| {
if current_period > outdated_threshold {
SymbolStatus::Outdated
} else {
SymbolStatus::UpToDate
}
},
);
(symbol.to_string(), (current_status, *last_updated))
})
.collect::<BTreeMap<String, (SymbolStatus, u64)>>();
Ok(enabled_symbols_info)
}
fn create_symbol_last_updated_gauge(
&self,
symbol: &str,
) -> Result<Gauge<U64>, PrometheusError> {
let opts = Opts::new(
"data_feed_symbol_last_updated",
"Timestamp of symbol last update",
)
.const_label("symbol_name", symbol.to_string());
let gauge = register(Gauge::<U64>::with_opts(opts)?, &self.registry)?;
Ok(gauge)
}
async fn set_symbol_last_update(
&mut self,
symbol: &str,
last_updated: u64,
) -> Result<(), String> {
if !self.symbols_update_timestamps.contains_key(symbol) {
let gauge = self
.create_symbol_last_updated_gauge(symbol)
.map_err(|e| format!("Prometheus gauge creation error: {:?}", e))?;
self.symbols_update_timestamps
.insert(symbol.to_string(), gauge);
}
self.symbols_update_timestamps
.get_mut(symbol)
.ok_or_else(|| {
format!(
"data_feed_symbol_last_updated Gauge not found for symbol: {:?}",
symbol
)
})?
.set(last_updated);
Ok(())
}
pub async fn run(mut self) {
loop {
match self.get_symbols().await {
Ok(enabled_symbols_info) => {
let outdated_symbols_count: u64 = enabled_symbols_info
.iter()
.filter(|(_, (status, _))| *status == SymbolStatus::Outdated)
.count() as u64;
let invalid_symbols_count: u64 = enabled_symbols_info
.iter()
.filter(|(_, (status, _))| *status == SymbolStatus::InvalidTime)
.count() as u64;
self.outdated_symbols.set(outdated_symbols_count);
self.invalid_symbols.set(invalid_symbols_count);
for (symbol, (_, last_updated)) in enabled_symbols_info {
if let Err(err) = self.set_symbol_last_update(&symbol, last_updated).await {
log::error!("Failed to set symbol update timestamp: {}", err);
}
}
}
Err(err) => {
log::error!("Failed to get oracle symbols: {:?}", err);
}
}
futures_timer::Delay::new(self.period).await;
}
}
}