generateMeta abstract method
Generates a valid Meta instance with a proper fingerprint.
Automatically creates a valid fingerprint by signing the seed with the private key, ensuring Meta.isValid returns true.
sKey is the private key to sign the seed (generates fingerprint).
seed is the optional seed/entity name (default: random or algorithm-specific).
Returns a valid Meta instance with verified fingerprint.
Implementation
Meta generateMeta(SignKey sKey, {String? seed});