1 files changed, 0 insertions, 114 deletions
diff --git a/p2p/enr/idscheme.go b/p2p/enr/idscheme.go
deleted file mode 100644
index efaf68041..000000000
--- a/p2p/enr/idscheme.go
+++ /dev/null
@@ -1,114 +0,0 @@
-// Copyright 2018 The go-ethereum Authors
-// This file is part of the go-ethereum library.
-//
-// The go-ethereum library is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Lesser General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// The go-ethereum library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU Lesser General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public License
-// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
-
-package enr
-
-import (
-	"crypto/ecdsa"
-	"fmt"
-	"sync"
-
-	"github.com/ethereum/go-ethereum/common/math"
-	"github.com/ethereum/go-ethereum/crypto"
-	"github.com/ethereum/go-ethereum/crypto/sha3"
-	"github.com/ethereum/go-ethereum/rlp"
-)
-
-// Registry of known identity schemes.
-var schemes sync.Map
-
-// An IdentityScheme is capable of verifying record signatures and
-// deriving node addresses.
-type IdentityScheme interface {
-	Verify(r *Record, sig []byte) error
-	NodeAddr(r *Record) []byte
-}
-
-// RegisterIdentityScheme adds an identity scheme to the global registry.
-func RegisterIdentityScheme(name string, scheme IdentityScheme) {
-	if _, loaded := schemes.LoadOrStore(name, scheme); loaded {
-		panic("identity scheme " + name + " already registered")
-	}
-}
-
-// FindIdentityScheme resolves name to an identity scheme in the global registry.
-func FindIdentityScheme(name string) IdentityScheme {
-	s, ok := schemes.Load(name)
-	if !ok {
-		return nil
-	}
-	return s.(IdentityScheme)
-}
-
-// v4ID is the "v4" identity scheme.
-type v4ID struct{}
-
-func init() {
-	RegisterIdentityScheme("v4", v4ID{})
-}
-
-// SignV4 signs a record using the v4 scheme.
-func SignV4(r *Record, privkey *ecdsa.PrivateKey) error {
-	// Copy r to avoid modifying it if signing fails.
-	cpy := *r
-	cpy.Set(ID("v4"))
-	cpy.Set(Secp256k1(privkey.PublicKey))
-
-	h := sha3.NewKeccak256()
-	rlp.Encode(h, cpy.AppendElements(nil))
-	sig, err := crypto.Sign(h.Sum(nil), privkey)
-	if err != nil {
-		return err
-	}
-	sig = sig[:len(sig)-1] // remove v
-	if err = cpy.SetSig("v4", sig); err == nil {
-		*r = cpy
-	}
-	return err
-}
-
-// s256raw is an unparsed secp256k1 public key entry.
-type s256raw []byte
-
-func (s256raw) ENRKey() string { return "secp256k1" }
-
-func (v4ID) Verify(r *Record, sig []byte) error {
-	var entry s256raw
-	if err := r.Load(&entry); err != nil {
-		return err
-	} else if len(entry) != 33 {
-		return fmt.Errorf("invalid public key")
-	}
-
-	h := sha3.NewKeccak256()
-	rlp.Encode(h, r.AppendElements(nil))
-	if !crypto.VerifySignature(entry, h.Sum(nil), sig) {
-		return errInvalidSig
-	}
-	return nil
-}
-
-func (v4ID) NodeAddr(r *Record) []byte {
-	var pubkey Secp256k1
-	err := r.Load(&pubkey)
-	if err != nil {
-		return nil
-	}
-	buf := make([]byte, 64)
-	math.ReadBits(pubkey.X, buf[:32])
-	math.ReadBits(pubkey.Y, buf[32:])
-	return crypto.Keccak256(buf)
-}