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Arka (Etherspot paymaster)
App integration

Arka (Etherspot paymaster)

Account abstraction & tx orchestration

Account abstraction · DevOps · Transaction management

etherspot/arka (opens in a new tab)

Arka is the open-source paymaster service from Etherspot for sponsoring transaction gas. Builders self-host it when gas sponsorship for ERC-4337 accounts should run on their own infrastructure.

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.