Passkey
WebAuthn P-256 signature verification0x00000000000000000000000000000000000000AA~3,450 gas
First, register a passkey. This will prompt for Face ID, Touch ID, or your device PIN.
Why It Matters
Standard EVM only supports secp256k1. Verifying passkeys in Solidity: ~300,000 gas. This precompile: ~3,000 gas. 100x cheaper.
Interface
Input: hash(32) | r(32) | s(32) | x(32) | y(32) = 160 bytes Output: bool (1 = valid, 0 = invalid)