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add min maxFeePerGas chain config override #198

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Merged
fichiokaku merged 1 commit into from
Mar 11, 2026
Merged

add min maxFeePerGas chain config override #198

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2 changes: 2 additions & 0 deletions src/modules/chains/schemas.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -67,6 +67,8 @@ const chainConfigSchemaBase = z.object({
gasCacheDuration: z.number().default(30000), // TODO: Add schema
feeHistoryBlockTagOverride: z.string().optional(),
eip1559: z.boolean().default(false),
/** Optional minimum maxFeePerGas (wei) for legacy chains; RPC may reject below this (e.g. BSC). */
minMaxFeePerGas: bigIntLikeSchema.optional(),
paymasterFunding: etherSchema.default("0.025"),
paymasterFundingThreshold: etherSchema.default("0"),
paymasterInitCode: hexSchema.optional(),
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13 changes: 10 additions & 3 deletions src/modules/gas-estimator/gas-estimator-v2.service.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -62,11 +62,18 @@ export class GasEstimatorServiceV2 {
},
)();

// Chain config may set a minimum (e.g. BSC); apply floor so RPC does not reject
const minGas = chainSettings.minMaxFeePerGas
? BigInt(chainSettings.minMaxFeePerGas)
: 0n;
const effectiveGasPrice =
minGas > 0n && gasPrice < minGas ? minGas : gasPrice;

conditions = {
maxFeePerGas: gasPrice,
maxPriorityFeePerGas: gasPrice,
maxFeePerGas: effectiveGasPrice,
maxPriorityFeePerGas: effectiveGasPrice,
l1GasPrice: 0n,
baseFee: gasPrice,
baseFee: effectiveGasPrice,
};
} else {
// EIP-1559 chain - use fee history for prediction
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