- Batch multiple actions into one atomic call (e.g. deposit → call user wallet → mint NFT)
- Delegate tx execution to the user, preserving
msg.sender
on the destination chain - Sponsor gas or use ERC-20s for fee payments
- Route logic across chains, bridging into EOAs that execute contract logic without a separate deployment
ERC-4337
Relay uses ERC-4337 to support complex smart account flows. Key features include:- Sponsored transactions using paymasters
- Arbitrary smart account validation logic
- Bundled execution: approve → swap → send, all in one tx
EIP-7702
Relay uses EIP-7702 to enable EOAs to become smart accounts. We support 7702 to:- Execute logic on destination chains where the user is
msg.sender
Useful for apps where the final contract cares about the actual sender (e.g. NFT mints, purchases) - Preserve intent and gas delegation across chains
Our solver can bridge ETH or tokens to the user’s EOA, and the EOA can act as a smart wallet - Avoid smart account setup on destination: the user’s EOA behaves like a contract temporarily, powered by an
authorizationList
signature
Why Smart Accounts Matter for Relay
Smart accounts let us overcome key limitations in a cross-chain solver system:Problem | Solved By |
---|---|
msg.sender is solver, but the app needs it to be the user | ✅ ERC-4337 / 7702 |
Want to batch calls after bridging ETH | ✅ ERC-4337 / 7702 |
Want to pay gas from any chain or abstract fees entirely | ✅ ERC-4337 paymasters / 7702 signature logic |
Want smart account functionality for your EOA | ✅ EIP-7702 |
- Relay bridges the ETH to their EOA
- That EOA uses a signed 7702 tx to batch logic on Chain B: approve → mint
msg.sender
= the user, not Relay
🔗 Explore the Guides
- ERC-4337 Guide – Learn how Relay uses UserOperations, paymasters, and bundlers
- EIP-7702 Guide – See how Relay turns EOAs into smart wallets with
authorizationList
Relay supports both 4337 and 7702. Whether you’re building gasless dApps, trustless UX, or bridging into smart behavior — smart accounts are the foundation. Let us know what you’re building.