package hashutil

import (
	"reflect"

	pb "github.com/prysmaticlabs/prysm/proto/beacon/p2p/v1"
)

// HashBeaconBlock hashes the full block without the proposer signature.
// The proposer signature is ignored in order obtain the same block hash used
// as the "block_root" property in the proposer signature data.
func HashBeaconBlock(bb *pb.BeaconBlock) ([32]byte, error) {
	if bb == nil || reflect.ValueOf(bb).IsNil() {
		return [32]byte{}, ErrNilProto
	}
	// Ignore the proposer signature by temporarily deleting it.
	sig := bb.Signature
	bb.Signature = nil
	defer func() { bb.Signature = sig }()

	return HashProto(bb)
}