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Safe 4337 module (safe-modules)
App integration

Safe 4337 module (safe-modules)

Account abstraction & tx orchestration

Account abstraction · Modular accounts · Solidity · Wallet

safe-fndn/safe-modules (opens in a new tab)@safe-global/safe-passkey(412) (opens in a new tab)

The Safe 4337 module adds native ERC-4337 support to Safe multisig accounts. Safe builders install it so an existing multisig can be driven by user operations through a bundler.

Related resources

Chain Abstraction with 4337

Chain Abstraction with 4337

With this setup, ecosystems can deploy tailor-made 4337 chain abstraction infrastructure. They become Liquidity Providers (LPs) for their users, sharing with them the value that would otherwise have been captured by solvers/fillers.

Rundler

Rundler

Rundler is Alchemy's modular Rust ERC-4337 bundler aimed at horizontally scaled deployments; many Ethereum user-operation workloads run on it today.

Skandha ERC-4337 Bundler

Skandha ERC-4337 Bundler

Skandha is Etherspot's TypeScript ERC-4337 bundler that optimizes user operation submission, gas accounting, and mempool routing with optional MEV protections and shared mempool compatibility, and Etherspot runs that shared mempool stack in production.

ethereum-multicall

Ability to call many ethereum constant function calls in 1 JSONRPC request

ZeroDev SDK (Kernel)

ZeroDev SDK (Kernel)

The ZeroDev SDK is a smart-account SDK for the Kernel account with modular validators and session keys. Account-abstraction builders use it to create Kernel accounts and delegate limited signing rights to sessions.

Biconomy SDK (Nexus)

Biconomy SDK (Nexus)

The Biconomy SDK, published as AbstractJS for the Nexus account, builds ERC-4337 smart accounts with paymaster and bundler services. Builders use it when an application needs sponsored or gasless transactions.