The stack's agreement-key derivation: HKDF-SHA-256(keyMaterial, salt "agreement") → 32 bytes, an X25519 private key.
InvalidParameter unless keyMaterial is a Uint8Array.
InvalidParameter
keyMaterial
Uint8Array
The stack's agreement-key derivation: HKDF-SHA-256(keyMaterial, salt "agreement") → 32 bytes, an X25519 private key.