WALLETS_

One BIP-39 seed across EVM, Solana and Bitcoin, SLIP-0010 / BIP-32 derivation, an encrypted-at-rest vault, and per-chain signing behind a single chain-adapter interface — so all three chains go through exactly the same send flow. Two engineering decisions worth pointing at: keys never leave the extension's background worker (dApps reach it only over EIP-1193 / EIP-6963, and the price/token/swap API is stateless and never sees a key), and every primitive wraps an audited library (@noble/*, @scure/*, viem, bitcoinjs-lib, @solana/web3.js).

An NFT + DeFi hybrid: a minimal-proxy smart-contract wallet holds an NFT (or ownership of another contract), can be handed to a renter for a fixed period, and is guaranteed — without trusting the renter — to return to its owner when the rental ends, enforced by Chainlink Automation.