Sovereign — ERC-4337 Smart Account & Paymaster
Account Abstraction Infrastructure with Biometric Passkeys
Sovereign bridges the onboarding gap for non-crypto-native users by abstracting seed phrases and gas fees. Built using the ERC-4337 standard, users can authenticate via FaceID / WebAuthn and execute transactions sponsored by an automated paymaster service.
System Architecture
Key Design PrimitivesOn-chain elliptic curve signature verification allowing Apple FaceID and TouchID to sign EVM user operations directly.
Custom backend sponsorship API checking user entitlement rules and funding gas execution via ERC-20 tokens or sponsor balances.
Engineering Bottlenecks
Complex seed phrases, gas fee calculations, and transaction signing frictions cause over 70% of mainstream users to drop out during Web3 onboarding.
Architectural Solution
Developed an ERC-4337 smart contract account architecture with Secp256r1 curve passkey verification, combined with a Next.js 15 Wagmi/Viem frontend and paymaster gas sponsorship logic.
Key Business & Technical Outcomes
Technology Stack
Selected for maximum throughput, type safety, and zero-maintenance reliability.
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