Gas models

A rollup's gas model decides how it charges for execution. The RDK supports four. The model is a configuration field — pick the one that matches your application's fee experience.

Gas model	Fee behaviour	Typical fit
standard	Fixed per-unit gas price	General-purpose rollups
eip1559	Base fee + priority tip, adjusts with demand	DeFi and EVM apps wanting market-responsive fees
flat	Flat fee per transaction	High-throughput apps that want predictable, uniform cost
subsidized	Operator subsidizes some or all fees	Permissioned / enterprise rollups and onboarding-friendly UX

standard

A straightforward fixed per-unit gas price. A solid default when you do not need demand-responsive pricing. Used by the nft and custom presets.

eip1559

A base fee that adjusts with demand plus an optional priority tip, matching the fee model EVM developers expect. Used by the defi preset.

flat

A flat fee per transaction regardless of computational cost. Predictable and cheap to reason about for workloads dominated by many small, similar transactions. Used by the gaming preset.

subsidized

The operator subsidizes some or all transaction fees, so end users pay little or nothing. Useful for permissioned deployments and smooth onboarding. Used by the enterprise preset.

Setting the gas model

The gas model comes from your preset and can be overridden:

import { presets } from "@qorechain/rdk";

const config = presets.custom({ rollupId: "my-rollup" }).set({
  gasModel: "eip1559",
});

config.validate();

The gas model is independent of the settlement paradigm, sequencer mode, and DA backend — any gas model can be combined with any valid configuration of those.