Immutable

Immutable gas sponsorship covers eligible Passport transactions on Immutable Chain

Immutable gas sponsorship covers the network fee for eligible Passport transactions on Immutable Chain. Players can perform covered on-chain actions without obtaining IMX solely to pay gas. Passport authorizes those actions, and Immutable's Relayer submits the transactions. Coverage includes eligible game interactions, asset transfers and trading. Managed minting through the Minting API has its own integration requirements. Sponsorship leaves purchase prices and the rules that game contracts enforce unchanged. A wallet can qualify for sponsored gas while lacking the payment tokens required for a purchase. Wallet origin, the execution network and anti-abuse controls determine whether an action can use sponsored gas.

In short: Sponsored gas covers eligible execution fees while purchase payments, contract permissions and transaction confirmation retain their separate requirements.

Passport connects wallet authorization with the Relayer

Passport provides the smart contract wallet that authorizes a player's action, while the Relayer submits it to Immutable Chain for execution. The fee payer covers execution costs, and the wallet's authorization determines which changes the transaction permits. Paying the fee does not give the sponsor permission to choose an asset recipient.

The game supplies the intended contract interaction, such as transferring an item or calling a crafting function. Passport's user and Guardian signatures authorize wallet execution, with the Guardian also applying security policies. The Relayer then handles submission and the gas payment for an eligible call.

Authentication identifies the Passport account, while wallet connection gives the application access to supported wallet operations. A successful sign-in alone does not establish that the application has wallet permission or that its requested transaction meets the conditions for execution.

Applications need the Relayer service to submit transactions through this sponsored route; wallet authorization alone does not place a transaction on-chain.

Which game actions qualify for sponsored gas?

Gas sponsorship can cover eligible Passport transactions involving game contract interactions, transfers, minting and trading on Immutable Chain through its supported transaction route. Each action must also satisfy Passport's security controls and the target contract's requirements.

Transactions originating from Passport

Immutable provides player gas sponsorship for Passport transactions on Immutable Chain. A game can integrate this route for supported on-chain actions. Sponsorship does not extend automatically to transactions originating from another wallet. A receiving Passport address does not turn an external sender into a Passport transaction.

Contract permissions and available assets

A sponsored call still needs valid contract inputs and authorization, including the relevant asset balance for a token transfer. Crafting can require ownership of the items that the contract consumes. Fee coverage supplies the network cost; it does not supply missing items or bypass a contract's access rules.

Game payments remain separate from network fees

Gas pays for blockchain execution, while an item's purchase payment compensates the seller under the order's terms. Sponsorship covers the eligible network charge, so a purchase can still require payment tokens even when the player owes no gas.

Immutable Orderbook trading can also include protocol fees, creator royalties and marketplace fees. These allocations belong to trade settlement and can coexist with a gas-sponsored purchase because sponsorship covers only the network fee.

The payment breakdown determines the buyer's required balance and the seller's proceeds, including the applicable royalty and marketplace allocations. A purchase screen should distinguish the asset payment from any gas charge so that a gas-free label does not imply a free item.

Use the payment breakdown for the intended fulfillment, because a previous listing query can contain different fee information.

Does gas sponsorship remove transaction confirmations?

Gas sponsorship does not by itself remove transaction confirmation prompts, because fee coverage and pre-approved transactions control different parts of the experience. One funds execution; the other governs when Passport requires a separate confirmation for an authorized game action.

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Pre-approved transactions support native Unity and Unreal clients with the required Passport integration, linked contracts and player consent for supported interactions. Web transactions require explicit confirmation prompts, so a gas-sponsored browser transaction can ask for approval without charging a network fee. Native IMX transfers also require confirmation, even where pre-approved contract interactions are available. Developers should preserve these boundaries when presenting gas-free gameplay: a game can offer sponsorship without every action qualifying for its popup-free transaction mode.

Rate limits protect the sponsorship service

Passport's security policies include rate limiting, spending limits and fraud detection, which restrict requests that the wallet will authorize. Gas sponsorship operates within those controls, so access to fee coverage does not promise unrestricted transaction volume.

Guardian validation can reject a request before execution, and excessive or abusive activity can affect sponsorship access. A rejection at this layer differs from a contract reverting after submission, so adding funds does not resolve every failure. Applications should report the actual error rather than describing every failure as insufficient gas. Authentication problems, wallet connection failures and unavailable backend services need different responses. Repeatedly submitting an unchanged request does not correct a missing permission or an invalid contract call.

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A transaction hash and successful execution

A transaction hash identifies a submitted transaction, while its receipt reports the execution outcome. A game must distinguish a request that reached submission from an action that successfully changed blockchain state.

Passport offers transaction methods that wait for confirmation and methods that return without waiting. Applications that use the latter need receipt tracking before treating critical asset operations as complete. A pending response supplies no final outcome, and a failed receipt cannot establish a successful transfer. For item ownership, the relevant contract's resulting owner or balance provides the state that the game needs. The application's inventory display also depends on its data refresh, which is separate from network confirmation.

Managed minting and direct contract calls

The Minting API provides a separate managed route for creating game assets with sponsored gas, handling submission and batching for supported collections. Direct minting from a studio-controlled wallet follows that wallet's transaction route and gas funding requirements.

Collections that the managed service supports

The Minting API requires Immutable preset contracts. Immutable's minting wallet needs the minter role on supported ERC-721 or ERC-1155 collections, and studios authenticate API requests with server-side credentials. A custom contract does not become compatible simply because it exposes a mint function.

Mint acceptance and completion

The service distinguishes pending, succeeded and failed mint requests, so queue acceptance does not establish that the asset exists. Invalid credentials or missing minter permissions can stop the operation despite gas coverage. Secret API credentials belong on the backend, where the studio controls access to managed minting.

Gas consumption and studio operating costs

IMX is the native gas token on Immutable Chain. Execution cost depends on gas consumption and the effective price per gas unit, both of which can vary with contract activity and network conditions. Sponsorship moves that cost away from the eligible player transaction. Studios should track gas expenditure in Immutable Hub and budget from their actual contract activity. A player's zero gas charge does not establish that the studio's blockchain operations have zero cost.

Gas coverage across transaction routes

The originating account and submission method determine which gas arrangement applies. These routes distinguish player sponsorship from managed minting and ordinary sender-funded calls. The destination alone does not establish who must pay the execution fee.

Changing from a Passport call to an ordinary external-wallet call changes the funding requirement. The same asset or game can support different wallet routes without extending Passport's sponsorship to every sender.

Costs at the network boundary

Bridging moves assets between networks and introduces charges outside the scope of an eligible game transaction. An Ethereum-side bridge call uses Ethereum execution and gas, which Passport sponsorship on Immutable Chain does not cover. The bridge route can also involve provider charges and destination-side processing, with payment requirements that follow the chosen route.

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For continued play, an eligible Passport action can proceed without a player-funded gas balance. For a purchase or network exit, the required payment and route costs determine the funds that the player needs.

Updated on Oct 8, 2026