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fix(sim): add fallback for polygon gasstaion failures #386

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Sep 18, 2023
Merged

fix(sim): add fallback for polygon gasstaion failures #386

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17 changes: 11 additions & 6 deletions crates/sim/src/gas/gas.rs
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Original file line number Diff line number Diff line change
@@ -1,6 +1,5 @@
use std::sync::Arc;

use anyhow::Context;
use ethers::{
prelude::gas_oracle::{GasCategory, GasOracle},
types::{Address, Chain, U256},
Expand Down Expand Up @@ -274,11 +273,17 @@ impl<P: Provider> FeeEstimator<P> {
if POLYGON_CHAIN_IDS.contains(&self.chain_id) {
let gas_oracle =
Polygon::new(Chain::try_from(self.chain_id)?)?.category(GasCategory::Fast);
let fees = gas_oracle
.estimate_eip1559_fees()
.await
.context("failed to query polygon gasstation")?;
Ok(fees.1)
match gas_oracle.estimate_eip1559_fees().await {
Ok(fees) => Ok(fees.1),
// Polygon gas station is very unreliable, fallback to max priority fee if it fails
// Fast can be 10% faster than what is returned by `eth_maxPriorityFeePerGas`
// so we increase the max priority fee by 10% to ensure that multiple
// calls to this endpoint give reasonably similar results.
Err(_) => Ok(math::increase_by_percent(
self.provider.get_max_priority_fee().await?,
10,
)),
}
} else if self.use_bundle_priority_fee {
self.provider.get_max_priority_fee().await
} else {
Expand Down
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