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polygon gas price estimation fix #30

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merged 2 commits into from
Jan 9, 2025
Merged

polygon gas price estimation fix #30

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1e66c9f
fix: more conservative polygon gas price estimates
daniel-savu Jan 9, 2025
d75db30
better naming
daniel-savu Jan 9, 2025
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12 changes: 8 additions & 4 deletions ethers-middleware/src/gas_oracle/polygon.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -8,6 +8,9 @@ use url::Url;
const MAINNET_URL: &str = "https://gasstation.polygon.technology/v2";
const MUMBAI_URL: &str = "https://gasstation-testnet.polygon.technology/v2";

const BASE_FEE_MULTIPLIER: f64 = 1.5;
const PRIO_FEE_MULTIPLIER: f64 = 1.1;

/// The [Polygon](https://docs.polygon.technology/docs/develop/tools/polygon-gas-station/) gas station API
/// Queries over HTTP and implements the `GasOracle` trait
#[derive(Clone, Debug)]
Expand Down Expand Up @@ -71,17 +74,18 @@ impl Response {
impl GasOracle for Polygon {
async fn fetch(&self) -> Result<U256, GasOracleError> {
let response = self.query().await?;
let base = response.estimated_base_fee;
let prio = response.estimate_from_category(self.gas_category).max_priority_fee;
let base = response.estimated_base_fee * BASE_FEE_MULTIPLIER;
let prio = response.estimate_from_category(self.gas_category).max_priority_fee
* PRIO_FEE_MULTIPLIER;
let fee = base + prio;
Ok(from_gwei(fee))
}

async fn estimate_eip1559_fees(&self) -> Result<(U256, U256), GasOracleError> {
let response = self.query().await?;
let estimate = response.estimate_from_category(self.gas_category);
let max = from_gwei(estimate.max_fee);
let prio = from_gwei(estimate.max_priority_fee);
let max = from_gwei(estimate.max_fee * BASE_FEE_MULTIPLIER);
let prio = from_gwei(estimate.max_priority_fee * PRIO_FEE_MULTIPLIER);
Ok((max, prio))
}
}
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