How to use 1inch wallet for gasless swaps? (Fusion Mode)

Understanding Fusion Mode Mechanics

1. Fusion Mode transforms the transaction flow by separating intent signing from execution. Users submit unsigned swap intentions instead of fully signed transactions.

2. These intents contain parameters such as token pair, slippage tolerance, price bounds, and time window—but no gas-related fields.

3. Resolvers—specialized off-chain solvers—compete to fulfill these intents by submitting on-chain transactions with their own gas funding.

4. The winning resolver executes the trade using their capital and infrastructure, then deducts fees from the output amount before settlement.

5. This decoupling eliminates the need for users to hold native tokens like ETH or MATIC for gas payments on supported chains.

Wallet Setup Requirements

1. Install the official 1inch Wallet application from verified app stores compatible with iOS 16 or later.

2. Create or import a wallet using mnemonic phrase or private key—HD wallet support ensures BIP-44 compliance and Ledger Live interoperability.

3. Enable biometric authentication and iCloud backup to secure access and preserve recovery options.

4. Connect to target networks including Ethereum, Arbitrum, Polygon, Avalanche, or Optimism through built-in network configuration.

5. Ensure the wallet interface displays “Fusion” toggle in the swap module; this indicates active readiness for gasless execution.

Initiating a Gasless Swap

1. Open the swap interface and select input and output tokens across any supported chain.

2. Enter the desired amount and adjust slippage control and price range sliders to define acceptable execution boundaries.

3. Activate the “Gasless via Fusion” option—this disables gas estimation and switches to Dutch auction logic.

4. Sign the intent using your wallet’s secure enclave or biometric prompt without triggering on-chain activity.

5. Monitor the status panel: pending intent confirmation, solver selection, and final on-chain settlement appear sequentially in real time.

Security Layers in Fusion Execution

1. All intents are cryptographically signed with ECDSA keys tied directly to the user’s wallet address.

2. No front-running is possible because intents lack nonce and gas price fields required for mempool manipulation.

3. Sandwich attack protection is enforced at protocol level—the solver must match exact price bounds defined during intent creation.

4. Flashbots integration allows private transaction routing, shielding order details from public view until inclusion.

5. Failed executions return full input amounts; partial fills are disallowed unless explicitly enabled by advanced users.

Frequently Asked Questions

Q: Can I cancel an intent after signing but before solver execution?Yes. Intent cancellation is supported within the defined time window before any resolver submits a matching transaction.

Q: Are all token pairs eligible for Fusion swaps?No. Only tokens listed in the 1inch Liquidity API and supported by active resolvers qualify—exotic or newly deployed tokens may be excluded.

Q: Does Fusion mode work on Layer 2 networks like Arbitrum or Optimism?Yes. Fusion operates natively on Arbitrum, Optimism, Polygon, and other EVM-compatible chains where 1inch has deployed resolver infrastructure.

Q: What happens if no resolver accepts my intent within the time limit?The intent expires automatically and no funds are moved. Users receive a notification and may resubmit with adjusted parameters.