consensus/engine/pq/engine.go

package pq

import (
	"context"

	"github.com/luxfi/ids"
)

// Engine defines the post-quantum consensus engine
type Engine interface {
	// Start starts the engine
	Start(context.Context, uint32) error

	// Stop stops the engine
	Stop(context.Context) error

	// HealthCheck performs a health check
	HealthCheck(context.Context) (interface{}, error)

	// IsBootstrapped returns whether the engine is bootstrapped
	IsBootstrapped() bool

	// VerifyQuantumSignature verifies a post-quantum signature
	VerifyQuantumSignature([]byte, []byte, []byte) error

	// GenerateQuantumProof generates a quantum-resistant proof
	GenerateQuantumProof(context.Context, ids.ID) ([]byte, error)
}

// PostQuantum implements post-quantum consensus engine
type PostQuantum struct {
	bootstrapped bool
	algorithm    string // ML-DSA, ML-KEM, etc.
}

// New creates a new post-quantum consensus engine
func New() *PostQuantum {
	return &PostQuantum{
		bootstrapped: false,
		algorithm:    "ML-DSA-65", // Default to ML-DSA-65
	}
}

// Start starts the engine
func (pq *PostQuantum) Start(ctx context.Context, requestID uint32) error {
	pq.bootstrapped = true
	return nil
}

// Stop stops the engine
func (pq *PostQuantum) Stop(ctx context.Context) error {
	return nil
}

// HealthCheck performs a health check
func (pq *PostQuantum) HealthCheck(ctx context.Context) (interface{}, error) {
	return map[string]interface{}{
		"healthy":   true,
		"algorithm": pq.algorithm,
	}, nil
}

// IsBootstrapped returns whether the engine is bootstrapped
func (pq *PostQuantum) IsBootstrapped() bool {
	return pq.bootstrapped
}

// VerifyQuantumSignature verifies a post-quantum signature
func (pq *PostQuantum) VerifyQuantumSignature(message, signature, publicKey []byte) error {
	// Implementation would use the configured post-quantum algorithm
	return nil
}

// GenerateQuantumProof generates a quantum-resistant proof
func (pq *PostQuantum) GenerateQuantumProof(ctx context.Context, blockID ids.ID) ([]byte, error) {
	// Implementation would generate proof using post-quantum cryptography
	return []byte{}, nil
}