package bloat

import (
	"bytes"

	"aead.dev/minisign"
)

// Verify checks the minisign signature and returns the body if valid.
func (b *Bloat[T]) verify(message []byte) ([]byte, bool, error) {
	// signature is last 4 lines:
	separated := bytes.Split(message, []byte("\n"))
	signature := bytes.Join(separated[len(separated)-4:len(separated)], []byte("\n"))
	body := bytes.Join(separated[:len(separated)-4], []byte("\n"))
	if !minisign.Verify(b.SignPub, body, signature) {
		return []byte(""), false, nil
	}
	return body, true, nil
}