What is a smart wallet?
A smart wallet is a crypto wallet implemented as a smart contract, where authorisation logic, security policies, and transaction behaviour are programmable rather than fixed to a private-key signature model. Unlike EOA (externally-owned account) wallets, smart wallets can implement custom security: multi-signature, social recovery, spending limits, session keys, batch transactions, and gas sponsorship.
How smart wallets differ from EOA
Three structural differences. (1) Authorisation — EOAs require ECDSA signature from the single private key; smart wallets can require any computable authorisation (multi-sig, time locks, biometric proof). (2) Recovery — EOA recovery requires seed phrase backup; smart wallets can implement social recovery, guardian contacts, or cloud-synced WebAuthn. (3) Functionality — EOAs execute single transactions; smart wallets execute arbitrary transaction batches with custom validation.
Major smart wallet implementations
Multiple categories exist. (1) Safe (formerly Gnosis Safe) — enterprise multi-sig, USD 100B+ assets under custody. (2) Argent — consumer-oriented with guardian-based recovery. (3) Coinbase Smart Wallet — passkey-based, ERC-4337 standard. (4) Embedded wallets — Privy, Dynamic, Web3Auth power smart wallets in consumer apps. Each balances UX, security, and customisability differently.
The ERC-4337 standard
ERC-4337 (account abstraction) became the dominant smart wallet standard in 2023-2024. The standard provides infrastructure (Bundlers, EntryPoint contract) that lets smart wallets work across applications without protocol-level changes. ERC-4337 unified previously-fragmented smart wallet implementations under a common interface, accelerating adoption.
Tradeoffs vs EOA
Smart wallets introduce additional considerations. (1) Gas costs — smart wallet operations require more gas than EOA transactions (typically 20-50% more). (2) Cross-chain compatibility — smart wallets need deployment on each chain; address management can be complex. (3) Audit dependence — smart wallet contract bugs could compromise funds, requiring audited implementations. The UX benefits typically outweigh these tradeoffs for non-power-users.
Türkiye context
For Türk Web3 developers, smart wallets are essential infrastructure for building consumer-facing crypto products. KVKK-compliant social recovery (using trusted contacts as guardians), Türk regulatory considerations (CASP licensing for wallet-as-a-service), and Türk fiat on-ramp integration all benefit from smart wallet programmability.
Related: Account Abstraction, Passkey Wallet, Crypto Wallet.