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use codec::Decode;
use framenode_runtime::eth_bridge::{
STORAGE_FAILED_PENDING_TRANSACTIONS_KEY, STORAGE_NETWORK_IDS_KEY,
STORAGE_PENDING_TRANSACTIONS_KEY, STORAGE_SUB_TO_HANDLE_FROM_HEIGHT_KEY,
};
use framenode_runtime::{eth_bridge::offchain::SignedTransactionData, opaque::Block, Runtime};
use prometheus_endpoint::{register, Gauge, Opts, PrometheusError, Registry, U64};
use sp_core::H256;
use sp_runtime::offchain::OffchainStorage;
use std::collections::{BTreeMap, BTreeSet};
use std::sync::Arc;
pub struct Metrics<B> {
pub backend: Arc<B>,
pub period: std::time::Duration,
pub pending_transactions: Gauge<U64>,
pub failed_pending_transactions: Gauge<U64>,
pub ethereum_from_height: BTreeMap<framenode_runtime::NetworkId, Gauge<U64>>,
pub ethereum_height: BTreeMap<framenode_runtime::NetworkId, Gauge<U64>>,
pub substrate_from_height: Gauge<U64>,
}
impl<B> Metrics<B>
where
B: sc_client_api::Backend<Block> + Send + Sync + 'static,
B::State: sc_client_api::StateBackend<sp_runtime::traits::HashFor<Block>>,
{
pub fn register(
registry: &Registry,
backend: Arc<B>,
period: std::time::Duration,
) -> Result<Self, PrometheusError> {
let mut ethereum_from_height = BTreeMap::new();
let mut ethereum_height = BTreeMap::new();
if let Some(storage) = backend.offchain_storage() {
Self::get_offchain_value(&storage, STORAGE_NETWORK_IDS_KEY, "network ids").map_or_else(
|| {
log::warn!("No network ids found in offchain storage. If you don't run bridge peer, this is fine");
Ok::<(), PrometheusError>(())
},
|networks: BTreeSet<framenode_runtime::NetworkId>| {
for network in networks {
let opts = Opts::new(
"eth_bridge_ethereum_to_handle_from_height",
"To handle from height for Ethereum network",
)
.const_label("network_id", format!("{}", network));
ethereum_from_height
.insert(network, register(Gauge::with_opts(opts)?, registry)?);
let opts =
Opts::new("eth_bridge_ethereum_height", "Height for Ethereum network")
.const_label("network_id", format!("{}", network));
ethereum_height.insert(network, register(Gauge::with_opts(opts)?, registry)?);
}
Ok(())
},
)?;
}
Ok(Self {
pending_transactions: register(
Gauge::new(
"eth_bridge_pending_transactions",
"Number of pending transactions",
)?,
registry,
)?,
failed_pending_transactions: register(
Gauge::new(
"eth_bridge_failed_pending_transactions",
"Number of failed pending transactions",
)?,
registry,
)?,
substrate_from_height: register(
Gauge::new(
"eth_bridge_substrate_from_height",
"To handle from height for Substrate network",
)?,
registry,
)?,
ethereum_from_height,
ethereum_height,
period,
backend,
})
}
pub fn get_offchain_value<T>(
storage: &<B as sc_client_api::Backend<Block>>::OffchainStorage,
key: &[u8],
description: &str,
) -> Option<T>
where
T: Decode,
{
storage
.get(sp_core::offchain::STORAGE_PREFIX, key)
.and_then(|value| {
T::decode(&mut &value[..])
.map_err(|e| {
log::error!("Failed to decode {} offchain value: {:?}", description, e);
})
.ok()
})
}
pub async fn run(self) {
loop {
if let Some(storage) = self.backend.offchain_storage() {
Self::get_offchain_value(
&storage,
STORAGE_PENDING_TRANSACTIONS_KEY,
"pending transactions",
)
.and_then(
|value: BTreeMap<H256, SignedTransactionData<Runtime>>| {
self.pending_transactions.set(value.len() as u64);
Some(())
},
);
Self::get_offchain_value(
&storage,
STORAGE_FAILED_PENDING_TRANSACTIONS_KEY,
"failed pending transactions",
)
.and_then(
|value: BTreeMap<H256, SignedTransactionData<Runtime>>| {
self.failed_pending_transactions.set(value.len() as u64);
Some(())
},
);
Self::get_offchain_value(
&storage,
STORAGE_SUB_TO_HANDLE_FROM_HEIGHT_KEY,
"handle from height for Substrate network",
)
.and_then(|value: framenode_runtime::BlockNumber| {
self.substrate_from_height.set(value as u64);
Some(())
});
for (network, gauge) in self.ethereum_from_height.iter() {
Self::get_offchain_value(
&storage,
format!("eth-bridge-ocw::eth-to-handle-from-height-{:?}", network)
.as_bytes(),
&format!("handle from height for Ethereum network {:?}", network),
)
.and_then(|value: u64| {
gauge.set(value as u64);
Some(())
});
}
for (network, gauge) in self.ethereum_height.iter() {
Self::get_offchain_value(
&storage,
&format!("eth-bridge-ocw::eth-height-{:?}", network).as_bytes(),
&format!("height for Ethereum network {:?}", network),
)
.and_then(|value: u64| {
gauge.set(value as u64);
Some(())
});
}
}
futures_timer::Delay::new(self.period).await;
}
}
}