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Overview

Trails supports paying gas fees in any permit-compatible (EIP-2612) token, including popular stablecoins like USDC and USDT. This removes the friction of needing native tokens on each chain.

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Why This Matters

Common problems this solves:
  • New chain onboarding: Users bridge to a new chain but have no native tokens for gas
  • Stablecoin-first users: Users who hold primarily stablecoins don’t need to manage gas tokens
  • Simplified UX: One token type for both payment and gas fees

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How It Works

When a user initiates a transaction, the widget presents available fee tokens alongside the default native gas option. For permit-compatible tokens (EIP-2612), the user signs an off-chain permit rather than an on-chain approval — no separate gas-spending transaction is required. The Trails relayer uses that permit signature to cover the fee, deducting it from the user’s selected token balance.

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Supported Fee Tokens

Any token implementing EIP-2612 (permit) can be used as a fee token. See the API Integration Guide for the complete permit flow implementation at an API level.

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Widget Behavior

In the Trails widget, alternative fee tokens are automatically presented to users when available. No additional configuration is required—the widget handles permit signatures and fee selection automatically.