Abstract
This ERC proposal defines WeissChannels, a protocol extension for ERC-4337 Smart Accounts. It enables single-signature, atomic, cross-chain execution without custodial intermediaries. The protocol introduces ephemeral, “just-in-time” state channels secured optimistically by Ethereum Layer 1, allowing users to control assets and execute transactions across multiple L2 chains with a single Merkle root signature.
Unlike intent-based systems where users delegate execution to third parties, WeissChannels enable users to execute their own transactions on destination chains, using Crosschain Liquidity Providers (XLPs) only for liquidity and gas fronting.
Read more: Full ERC-8888 Proposal
Ethresear.ch thread: https://ethresear.ch/t/eil-trust-minimized-cross-l2-interop/23437
Reference Implementation
A reference implementation is available including the CrossChainPaymaster, L1AtomicSwapStakeManager, and bridge connectors.
Contracts: https://github.com/eth-infinitism/eil-contracts
SDK: https://github.com/eth-infinitism/eil-sdk