package applayoutbundleauthorityv1

import (
	"crypto/sha256"
	"encoding/hex"
)

// EvidenceDigest returns lowercase sha256:<64 lowercase hex> over every byte
// returned by CanonicalEvidenceBytes. No receipt or mutable registry state is
// an input.
func EvidenceDigest(evidence Evidence) (string, error) {
	canonical, err := CanonicalEvidenceBytes(evidence)
	if err != nil {
		return "", err
	}
	digest := sha256.Sum256(canonical)
	return "sha256:" + hex.EncodeToString(digest[:]), nil
}