Our new cross-chain solution, built with security as a core principle, enables seamless token swaps across multiple blockchains while ensuring complete asset protection.
We are excited to introduce Fusion+, a breakthrough upgrade to our intent-based swap product that brings advanced cross-chain functionality. With Fusion+, users maintain full self-custody of their assets throughout the process. The architecture ensures that transactions are fully completed on the two networks involved in the swap without relying on any intermediaries.
Since its inception, 1inch has been at the forefront of blockchain innovation. It began by aggregating on-chain liquidity in the most efficient manner. Later, with the introduction of 1inch Fusion, it combined both on-chain and off-chain liquidity using an intent-based approach, delivering convenient and secure swaps designed with built-in protection against maximal extractable value (MEV).
Cross-Chain Swaps with Fusion+
Fusion+ represents a true game-changer in the cross-chain landscape. This upgrade aggregates liquidity from across the entire Web3 ecosystem, enabling fast, efficient, and secure cross-chain swaps—all accessible from a single platform.
Historically, cross-chain swaps were hampered by slow and expensive bridges, along with the risks associated with centralized exchanges. Fusion+ changes this dynamic by offering a decentralized, self-custodial solution that taps into the vast liquidity of Web3. This ensures users receive the best available rates with unmatched security.
The cross-chain swap upgrade builds upon the intent-based approach first introduced with 1inch Fusion in late 2022, as well as groundbreaking atomic swap technology. Here’s a brief overview of how 1inch Fusion swaps operate: users specify the minimum return they are willing to accept, and professional traders, known as resolvers, compete to execute the swaps at the most favorable rates. Pricing is determined through a Dutch auction model, where filling rates decrease over time based on swap volume and user-defined presets that establish price and duration limits. A smart price curve accounts for market liquidity and adjusts for gas prices to ensure optimal execution. Additionally, the intent-based architecture of 1inch Fusion is designed with MEV protection to safeguard users from exploitative practices.
How Atomic Swaps Enhance Security
Fusion+ integrates atomic swap technology, which ensures that cross-chain swaps are both secure and trustless:
- Secure: Atomic swaps are designed as all-or-nothing transactions. If a swap fails to complete for any reason—such as the expiration of a timelock—the assets are automatically returned to their original owner.
- Trustless: Both parties can exchange assets without requiring mutual trust, as the swap is governed by smart contracts. These contracts verify all transaction conditions, eliminating the need to rely on intermediaries or counterparties.
The key takeaway is that the process is entirely trustless, operating purely through verification. This critical aspect is also applied in Fusion+ cross-chain swaps. For this reason, users must keep the swap tab open in the decentralized application (dApp) or within the 1inch Wallet (when available) until the swap is fully verified, ensuring the highest level of safety.
How to Perform a Fusion+ Cross-Chain Swap
All technical complexities are managed behind the scenes, allowing users to enjoy a seamless and intuitive experience. Cross-chain swaps become as straightforward as any routine transaction.
Please note: Fusion+ is currently in its beta version. Users who wish to try cross-chain swaps need to manually enable Fusion+ in their Settings. After the testing period, Fusion+ cross-chain swaps will be automatically enabled for all users.
For the user, executing a swap requires just a few simple steps:
- Navigate to the 1inch dApp and enable Fusion+ in Settings (required only during the testing period).
- Select the tokens and blockchains you wish to swap between.
- Confirm the swap details.
- Keep the swap interface open until the process is fully completed.
Understanding the Mechanics of Fusion+
For those interested in the technical workings, here is a step-by-step breakdown of the process:
Imagine a user holds POL tokens on the Polygon network and wants to exchange them for ETH on Ethereum.
- Initiating the swap: The user enters the order details into the swap form. The order is then shared with resolvers, and a Dutch auction begins where the price decreases until a resolver accepts the order.
- Locking the funds: The resolver deposits the user’s POL tokens into an escrow contract on Polygon by executing the 1inch Fusion order. This escrow contract includes a secret hash, token details, and a timelock. Simultaneously, the resolver deposits ETH into an escrow contract on Ethereum using the same secret and conditions.
- Completing the swap: Once both contracts are active on their respective blockchains, the cryptographic secret is revealed. The resolver then unlocks the ETH for the user on Ethereum and claims the POL tokens on Polygon, finalizing the exchange.
- Timelock protection: If the swap is not completed within the designated timeframe, the resolver can cancel the contracts, and all funds are returned to their original owners.
Availability and Next Steps
Experience seamless Fusion+ cross-chain swaps directly through the 1inch dApp. To be among the first to leverage these benefits, enable Fusion+ in your Settings during the beta testing phase.
With Fusion+, 1inch is establishing a new standard for cross-chain interoperability while advancing the security and decentralization of the Web3 ecosystem.
Get started with Fusion+ today for effortless and secure cross-chain swaps! For those looking to explore advanced DeFi strategies, you can discover powerful trading tools to enhance your experience.
Frequently Asked Questions
What is Fusion+?
Fusion+ is an upgraded cross-chain swap solution from 1inch that enables users to exchange tokens across different blockchains securely and efficiently. It uses atomic swap technology and an intent-based model to ensure optimal rates and self-custody of assets.
How does Fusion+ protect users from MEV?
Fusion+ incorporates an intent-based architecture designed with built-in protection against maximal extractable value (MEV). The Dutch auction model and smart contract verification work together to minimize the risk of exploitative trading practices.
Do I need to enable Fusion+ to use it?
During the beta testing period, yes—users must manually enable Fusion+ in the Settings of the 1inch dApp. After testing, it will be automatically enabled for all users.
What happens if my cross-chain swap fails?
Thanks to atomic swap technology, if a transaction fails or a timelock expires, all assets are automatically returned to their original owners. This all-or-nothing approach ensures no funds are lost mid-swap.
Which blockchains are supported by Fusion+?
Fusion+ is designed to work across multiple blockchains within the Web3 ecosystem. For the most current list of supported networks, refer to the official 1inch documentation or application.
Can I use Fusion+ on mobile devices?
Yes, Fusion+ will be available on the 1inch Wallet mobile application once fully launched. For now, users can access the beta version via the 1inch dApp on compatible browsers. To manage your assets across chains, consider using a reliable multi-chain platform for added convenience.