
ERC-1271 Smart Contract Signatures: How Wallets Verify Authority
ERC-1271 lets smart contract wallets validate signatures with programmable rules. Learn how isValidSignature works, where compatibility breaks, and key risks.

ERC-1271 lets smart contract wallets validate signatures with programmable rules. Learn how isValidSignature works, where compatibility breaks, and key risks.

ERC-2612 Permit and Uniswap Permit2 can simplify ERC-20 approvals, but signatures still carry risk. Compare their flows, scope, and safety checks.

Clear signing makes wallet prompts readable. Learn how blind signing differs, what EIP-712 and draft ERC-7730 do, and what to verify.

Passkey crypto wallets replace seed-phrase-first onboarding with device authentication. Learn how they work, what they protect, and where risks remain.

A single seed phrase is one point of failure. Multisig and MPC wallets both fix that — very differently. How each works, who should use which, and the risks.

Wallet drainers don't steal your keys — they trick you into approving them. How token approvals work, how drainers exploit them, and how to revoke access.

Hot wallet or cold wallet — which should hold your crypto? Compare security, convenience, cost, and use cases, plus how hardware wallets actually work.