Trust Wallet FlexGas Feature Overview: The Evolution of Gas Fee Payments in Crypto

Imagine using your familiar non-custodial wallet without the constant need to top it up with native tokens to pay transaction fees.

The need to hold native tokens for every crypto transaction can be a barrier for many users interacting with cryptocurrency or decentralized applications, creating unnecessary friction in the process. However, following a recent Ethereum update, Trust Wallet has implemented an effective solution to this limitation in the form of the FlexGas feature, which allows users to pay gas fees with tokens other than the native networks’ coins.

Trust Wallet is a leading multichain non-custodial wallet with over 200 million users. It is a user-friendly and secure wallet that supports more than 100 different blockchains and over 10 million assets, providing users with all the necessary tools for storing, sending cryptocurrencies, and seamlessly interacting with the DeFi sector.

EIP-7702: Enabling Next-Level Wallet Features

Before diving into the exploration of FlexGas, it’s important to understand the key details that made the implementation of this feature possible — Ethereum Improvement Proposal 7702 (EIP-7702).

EIP-7702 is an on-chain proposal for Ethereum, co-authored by Vitalik Buterin, that introduces a new type of transaction allowing Externally Owned Accounts (EOAs) to set smart contract code for wallets, which can only be executed during the transaction. This proposal brings Account Abstraction (AA) capabilities to standard EOAs, making user interaction with the blockchain highly flexible and convenient. Thanks to this update, solutions such as gas sponsorship, batch transactions, custom transaction execution logic, and flexible authentication and authorization methods have become available, all while maintaining non-custodial control without handing full control over to smart contracts.

Trust Wallet CEO Eowyn Chen highlights: “EIP-7702 changes the game. It’s the most important UX upgrade Ethereum has seen in years, and we’re excited to be among the first wallets building directly on top of it.”

What is FlexGas?

FlexGas is a new feature in Trust Wallet — and the first major use case of EIP-7702 implemented by a wallet — that allows users to pay gas transaction fees with different tokens instead of native blockchain coins. At launch, the feature supported USDT, USDC and TWT on BNB Chain, and USDT and USDC on Ethereum.

How FlexGas Works?

To use FlexGas, users don’t need to create a new wallet or account. The process is seamless: for example, when sending USDT on BNB Chain, the user can choose to pay the gas fee in USDT itself, without needing any BNB in their wallet..

The feature is built entirely in-house by Trust Wallet, using a Paymaster system instead of depending on third-party SDKs. This approach enables token-based gas payments with full self-custody, clearly setting Trust Wallet’s solution apart.

Key Benefits of FlexGas

Gas fees are an essential part of every transaction across the entire crypto ecosystem, regardless of the blockchain type. While the mechanism is well-understood, it can create friction for both advanced users—who perform frequent transactions across various networks—and newcomers, who may find it confusing to top up their wallets with native blockchain coins just to make a transfer. FlexGas addresses this pain point directly. Here are the main benefits:

• User experience upgrade: FlexGas, made possible by EIP-7702, opens the door for Trust Wallet to introduce other useful features that enhance functionality and user convenience — all while staying fully decentralized.
• Reduced onboarding friction: A large number of new crypto users can easily start moving crypto with Trust Wallet without the extra step of funding their wallet with native coins just to cover gas fees,  which also reduces the chances of failed transactions.

Next Steps: Exploring New Planned Use Cases

Trust Wallet continues to innovate on top of Ethereum’s new EIP-7702 upgrade, with several new features in development:

• Automated strategies and actions: Includes subscriptions, DCA (automated, scheduled crypto purchases), session keys (temporary permissions for seamless dApp interactions), and more.
• Gas sponsorship: Enables dApps to cover gas fees instead of users, facilitating a smoother onboarding experience.

Conclusion

Self-custody and security versus convenience and comprehensive features — crypto users often have to choose between these two priorities when selecting a wallet. But with Trust Wallet’s consistent focus on user needs and its ability to adapt to emerging trends—including the development of new features based on EIP-7702 like the FlexGas feature—Trust Wallet proves that this compromise is no longer necessary.

“Our vision is to evolve wallets from static key holders into intelligent, user-friendly agents,” added Eowyn Chen. “EIP-7702 gives us the foundation to do it in a self-custodial, secure way — at scale.”

To learn more about the FlexGas feature and stay updated with new announcements from Trust Wallet, check the following official links:

Official announcement | X | Telegram | LinkedIn | Download Trust Wallet