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gas bench: append ETHERSCAN_API_KEY to fix shared-IP throttle #1505

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Merged
Flotapponnier merged 1 commit into from
Jul 26, 2026
Merged

gas bench: append ETHERSCAN_API_KEY to fix shared-IP throttle #1505

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13 changes: 11 additions & 2 deletions harnesses/gas-estimation/cmd/script/config.go
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Original file line number Diff line number Diff line change
Expand Up @@ -182,9 +182,18 @@ func endpointForChain(o Oracle, c Chain) OracleEndpoint {
URL: fmt.Sprintf("https://api.owlracle.info/v4/%s/gas", c.OwlracleSlug),
}
case OracleEtherscan:
return OracleEndpoint{
URL: fmt.Sprintf("https://api.etherscan.io/v2/api?chainid=%d&module=gastracker&action=gasoracle", c.ChainID),
// Etherscan v2 no-key limit is 1 req/5s per IP, shared across
// chains. With 4 chains × 15s poll + 6s global gate we bump
// against that ceiling and start emitting `throttled` results.
// When ETHERSCAN_API_KEY is set (shared with explorer-chain-
// coverage / buyback-audit harnesses on the same VPS, 100k/day
// quota) we append it as query string — free-tier key raises
// the limit to 5 req/s across all chains, way past our need.
u := fmt.Sprintf("https://api.etherscan.io/v2/api?chainid=%d&module=gastracker&action=gasoracle", c.ChainID)
if k := envDefault("ETHERSCAN_API_KEY", ""); k != "" {
u += "&apikey=" + k
}
return OracleEndpoint{URL: u}
case OracleMetaMask:
return OracleEndpoint{
URL: fmt.Sprintf("https://gas.api.cx.metamask.io/networks/%d/suggestedGasFees", c.ChainID),
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