EIP-1193 wallet shim with EIP-6963 + EIP-2255 + EIP-191 + EIP-712 (yultrace)
Python/Playwright-compatible window.ethereum provider backed by a local private key. Signs personal_sign, eth_signTypedData_v4; implements wallet_requestPermissions, wallet_switchEthereumChain, eth_accounts, eth_chainId, announces via EIP-6963 (discovered by Code4rena/Hypercerts). Rejects on-chain b