From 13aeb83fdb10032ef53baf20429aa89696d71457 Mon Sep 17 00:00:00 2001
From: Miguel Montes <miguel.montes@gmail.com>
Date: Mon, 12 Nov 2018 23:29:09 -0300
Subject: [PATCH] =?UTF-8?q?Reorganizaci=C3=B3n=20del=20c=C3=B3digo=20de=20?=
=?UTF-8?q?bfa=5Fclient?=
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---
bfa_client/src/clique/clique.go | 44 +++++++++++++++++++++++++++++++++
1 file changed, 44 insertions(+)
create mode 100644 bfa_client/src/clique/clique.go
diff --git a/bfa_client/src/clique/clique.go b/bfa_client/src/clique/clique.go
new file mode 100644
index 0000000..f4aa9c2
--- /dev/null
+++ b/bfa_client/src/clique/clique.go
@@ -0,0 +1,44 @@
+package clique
+
+import (
+ "github.com/ethereum/go-ethereum/common"
+ "github.com/ethereum/go-ethereum/core/types"
+ "github.com/ethereum/go-ethereum/crypto"
+ "github.com/ethereum/go-ethereum/crypto/sha3"
+ "github.com/ethereum/go-ethereum/rlp"
+ "../util"
+)
+
+func sigHash(header *types.Header) (hash common.Hash) {
+ hasher := sha3.NewKeccak256()
+
+ rlp.Encode(hasher, []interface{}{
+ header.ParentHash,
+ header.UncleHash,
+ header.Coinbase,
+ header.Root,
+ header.TxHash,
+ header.ReceiptHash,
+ header.Bloom,
+ header.Difficulty,
+ header.Number,
+ header.GasLimit,
+ header.GasUsed,
+ header.Time,
+ header.Extra[:len(header.Extra)-65], // Yes, this will panic if extra is too short
+ header.MixDigest,
+ header.Nonce,
+ })
+ hasher.Sum(hash[:0])
+ return hash
+}
+
+func GetSigner(header *types.Header) (signer string, err error) {
+ signature := header.Extra[len(header.Extra)-65:]
+ hash := sigHash(header).Bytes()
+ pubkey, err := crypto.Ecrecover(hash, signature)
+ address := make([]byte, 20)
+ copy(address, crypto.Keccak256(pubkey[1:])[12:])
+ signer = util.ToHex(address)
+ return
+}
--
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