/// <summary>
/// Make rpc call
/// </summary>
private async Task RpcCallCommand <T>(IPEndPoint endPoint, string method, string parameters = null, bool deserializeResult = false)
{
if (string.IsNullOrEmpty(parameters))
{
parameters = "[]";
}
using (HttpClient wb = new HttpClient())
{
var content = new StringContent
(
"{\"jsonrpc\": \"2.0\", \"method\": \"" + method + "\", \"params\": " + parameters + ", \"id\":1}", Encoding.UTF8,
"application/json"
);
var rest = await wb.PostAsync("http://" + endPoint.Address.ToString() + ":" + endPoint.Port.ToString(), content);
if (!rest.IsSuccessStatusCode)
{
_consoleHandler.WriteLine(rest.StatusCode + " - " + rest.ReasonPhrase, ConsoleOutputStyle.Error);
return;
}
var json = JObject.Parse(await rest.Content.ReadAsStringAsync());
if (deserializeResult)
{
var obj = BinarySerializer.Default.Deserialize <T>(json["result"].Value <string>().HexToBytes());
if (obj is BlockHeader bh)
{
_blockSigner.Sign(bh);
if (bh is Block bb && bb.Transactions != null)
{
foreach (var tx in bb.Transactions)
{
_txSigner.Sign(tx);
}
}
}
else
{
if (obj is Transaction tx)
{
_txSigner.Sign(tx);
}
}
_consoleHandler.WriteObject(obj, PromptOutputStyle.json);
}
else
{
_consoleHandler.WriteObject(json, PromptOutputStyle.json);
}
}
}
/// <summary>
/// Creates a new token member.
/// </summary>
/// <param name="memberId">the member ID</param>
/// <param name="operations">the operations to apply</param>
/// <param name="metadata">the metadata of the operations</param>
/// <param name="signer">the signer used to sign the request</param>
/// <returns>the created member</returns>
public Task <ProtoMember> CreateMember(
string memberId,
IList <MemberOperation> operations,
IList <MemberOperationMetadata> metadata,
ISigner signer)
{
var update = new MemberUpdate
{
MemberId = memberId,
Operations = { operations }
};
var request = new UpdateMemberRequest
{
Update = update,
UpdateSignature = new Signature
{
MemberId = memberId,
KeyId = signer.GetKeyId(),
Signature_ = signer.Sign(update)
},
Metadata = { metadata }
};
return(gateway.UpdateMemberAsync(request)
.ToTask(response => response.Member));
}
public override Script GenerateScriptSig(Network network, Script scriptPubKey, IKeyRepository keyRepo,
ISigner signer)
{
var multiSigParams = PayToMultiSigTemplate.Instance.ExtractScriptPubKeyParameters(scriptPubKey);
var signatures = new TransactionSignature[multiSigParams.PubKeys.Length];
var keys =
multiSigParams
.PubKeys
.Select(p => keyRepo.FindKey(p.ScriptPubKey))
.ToArray();
var sigCount = 0;
for (var i = 0; i < keys.Length; i++)
{
if (sigCount == multiSigParams.SignatureCount)
{
break;
}
if (keys[i] != null)
{
var sig = signer.Sign(keys[i]);
signatures[i] = sig;
sigCount++;
}
}
IEnumerable <TransactionSignature> sigs = signatures;
if (sigCount == multiSigParams.SignatureCount)
{
sigs = sigs.Where(s => s != TransactionSignature.Empty && s != null);
}
return(PayToMultiSigTemplate.Instance.GenerateScriptSig(sigs));
}
public Packet Auth(NodeId remoteNodeId, EncryptionHandshake handshake)
{
handshake.RemoteNodeId = remoteNodeId;
handshake.InitiatorNonce = _cryptoRandom.GenerateRandomBytes(32);
handshake.EphemeralPrivateKey = new PrivateKey(_cryptoRandom.GenerateRandomBytes(32));
byte[] staticSharedSecret = BouncyCrypto.Agree(_privateKey, remoteNodeId.PublicKey);
byte[] forSigning = staticSharedSecret.Xor(handshake.InitiatorNonce);
AuthEip8Message authMessage = new AuthEip8Message();
authMessage.Nonce = handshake.InitiatorNonce;
authMessage.PublicKey = _privateKey.PublicKey;
authMessage.Signature = _signer.Sign(handshake.EphemeralPrivateKey, new Keccak(forSigning));
byte[] authData = _messageSerializationService.Serialize(authMessage);
int size = authData.Length + 32 + 16 + 65; // data + MAC + IV + pub
byte[] sizeBytes = size.ToBigEndianByteArray().Slice(2, 2);
byte[] packetData = _eciesCipher.Encrypt(
remoteNodeId.PublicKey,
authData,
sizeBytes);
handshake.AuthPacket = new Packet(Bytes.Concat(sizeBytes, packetData));
return(handshake.AuthPacket);
}
public void Sign(BlockHeader blockHeader)
{
// Check if the BlockHeader is already signed.
if (blockHeader.Hash != null && blockHeader.Hash != UInt256.Zero)
{
return;
}
if (blockHeader.MerkleRoot == null)
{
// Compute hash
blockHeader.MerkleRoot = MerkleTree.ComputeRoot(blockHeader.TransactionHashes);
}
var serializedBlockHeader = _binarySerializer.Serialize(blockHeader, new BinarySerializerSettings()
{
Filter = a => a != nameof(Witness) &&
a != nameof(Type) &&
a != nameof(blockHeader.TransactionHashes)
});
blockHeader.Hash = new UInt256(_crypto.Hash256(serializedBlockHeader));
_witnessSigner.Sign(blockHeader.Witness);
}
public override void Sign(InputSigningContext inputSigningContext, IKeyRepository keyRepository, ISigner signer)
{
var scriptCode = inputSigningContext.Coin.GetScriptCode();
var multiSigParams = PayToMultiSigTemplate.Instance.ExtractScriptPubKeyParameters(scriptCode);
TransactionSignature?[] signatures = new TransactionSignature[multiSigParams.PubKeys.Length];
var keys = multiSigParams.PubKeys;
int sigcount = 0;
for (int i = 0; i < keys.Length && sigcount < multiSigParams.SignatureCount; i++)
{
var sig = signer.Sign(keys[i]) as TransactionSignature;
signatures[i] = sig;
if (sig != null)
{
sigcount++;
}
}
for (int i = 0; i < keys.Length; i++)
{
var sig = signatures[i];
var key = keys[i];
if (key is PubKey && sig is TransactionSignature s && s != TransactionSignature.Empty)
{
inputSigningContext.Input.PartialSigs.TryAdd(key, sig);
}
}
}
public void Sign(Block block)
{
// Compute tx hashes
var txSize = block.Transactions?.Length ?? 0;
block.TransactionHashes = new UInt256[txSize];
for (var x = 0; x < txSize; x++)
{
_transactionSigner.Sign(block.Transactions?[x]);
block.TransactionHashes[x] = block.Transactions?[x].Hash;
}
block.MerkleRoot = MerkleTree.ComputeRoot(block.TransactionHashes.ToArray());
// Compute hash
var serializedBlock = _binarySerializer.Serialize(block, new BinarySerializerSettings
{
Filter = a => a != nameof(block.Witness) &&
a != nameof(block.Transactions) &&
a != nameof(block.TransactionHashes) &&
a != nameof(block.Type)
});
block.Hash = new UInt256(_crypto.Hash256(serializedBlock));
_witnessOperationsManager.Sign(block.Witness);
}
/// <summary>
/// Get blocks from stream
/// </summary>
/// <param name="stream">Stream</param>
/// <param name="read_start">Read start index</param>
/// <returns>Get block</returns>
private IEnumerable <Block> GetBlocks(Stream stream, bool read_start = false)
{
using (var reader = new BinaryReader(stream))
{
var start = read_start ? reader.ReadUInt32() : 0;
var count = reader.ReadUInt32();
var end = start + count - 1;
if (end <= _blockchainContext.CurrentBlock.Index)
{
yield break;
}
using (var progress = _consoleHandler.CreatePercent(count))
{
for (var height = start; height <= end; height++)
{
var array = reader.ReadBytes(reader.ReadInt32());
progress.Value++;
if (height > _blockchainContext.CurrentBlock.Index)
{
var block = BinarySerializer.Default.Deserialize <Block>(array);
_blockSigner.Sign(block);
yield return(block);
}
}
}
}
}
public override Script GenerateScriptSig(Script scriptPubKey, IKeyRepository keyRepo, ISigner signer)
{
var multiSigParams = PayToMultiSigTemplate.Instance.ExtractScriptPubKeyParameters(scriptPubKey);
TransactionSignature[] signatures = new TransactionSignature[multiSigParams.PubKeys.Length];
var keys =
multiSigParams
.PubKeys
.Select(p => keyRepo.FindKey(p.ScriptPubKey))
.ToArray();
int sigCount = 0;
for(int i = 0 ; i < keys.Length ; i++)
{
if(sigCount == multiSigParams.SignatureCount)
break;
if(keys[i] != null)
{
var sig = signer.Sign(keys[i]);
signatures[i] = sig;
sigCount++;
}
}
IEnumerable<TransactionSignature> sigs = signatures;
if(sigCount == multiSigParams.SignatureCount)
{
sigs = sigs.Where(s => s != TransactionSignature.Empty && s != null);
}
return PayToMultiSigTemplate.Instance.GenerateScriptSig(sigs);
}
public Transaction BuildTransaction(long gaslimit, byte[] callData, Address sender, BlockHeader parent, IReleaseSpec spec,
UInt256 nonce, bool systemTransaction)
{
Transaction transaction = systemTransaction ? new SystemTransaction() : new Transaction();
UInt256 fee = BaseFeeCalculator.Calculate(parent, spec);
transaction.GasPrice = fee;
transaction.GasLimit = gaslimit;
transaction.To = _entryPointContractAddress;
transaction.ChainId = _specProvider.ChainId;
transaction.Nonce = nonce;
transaction.Value = 0;
transaction.Data = callData;
transaction.Type = TxType.EIP1559;
transaction.DecodedMaxFeePerGas = fee;
transaction.SenderAddress = sender;
if (!systemTransaction)
{
_signer.Sign(transaction);
}
transaction.Hash = transaction.CalculateHash();
return(transaction);
}
public async Task <IEnumerable <BlockHeader> > Persist(params BlockHeader[] blockHeaders)
{
if (blockHeaders == null)
{
throw new ArgumentNullException(nameof(blockHeaders));
}
var blockHeadersToPersist = _blockchainContext.LastBlockHeader == null?
blockHeaders
.ToList() : // Persisting the Genesis block
blockHeaders
.Where(bh => bh != null && bh.Index > _blockchainContext.LastBlockHeader.Index)
.Distinct(bh => bh.Index)
.OrderBy(bh => bh.Index)
.ToList();
foreach (var blockHeader in blockHeadersToPersist)
{
_blockHeaderSigner.Sign(blockHeader);
if (!_blockHeaderValidator.IsValid(blockHeader))
{
_logger.LogInformation($"Block header with hash {blockHeader.Hash} and index {blockHeader.Index} is invalid and will not be persist.");
blockHeadersToPersist.Remove(blockHeader);
break;
}
await _blockRepository.AddBlockHeader(blockHeader);
_blockchainContext.LastBlockHeader = blockHeader;
}
return(blockHeadersToPersist);
}
public static UpdateMemberRequest ToUpdateMemberRequest(
ProtoMember member,
IList <MemberOperation> operations,
ISigner signer,
IList <MemberOperationMetadata> metadata)
{
var update = new MemberUpdate
{
MemberId = member.Id,
PrevHash = member.LastHash,
Operations = { operations }
};
return(new UpdateMemberRequest
{
Update = update,
UpdateSignature = new Signature
{
MemberId = member.Id,
KeyId = signer.GetKeyId(),
Signature_ = signer.Sign(update)
},
Metadata = { metadata }
});
}
/// <inheritdoc />
public override async Task Handle(TransactionMessage message, IPeer sender)
{
var transaction = message.Payload;
if (transaction is MinerTransaction)
{
return;
}
if (transaction.Hash == null)
{
_transactionSigner.Sign(transaction);
}
if (await _transactionRepository.ContainsTransaction(transaction.Hash))
{
_logger.LogInformation($"The transaction \"{transaction.Hash?.ToString(true)}\" exists already on the blockchain.");
return;
}
// Transaction is not added right away but queued to be verified and added.
// It is the reason why we do not broadcast immediately.
// TODO #374: It is a bit more complicated
_transactionPool.Add(transaction);
_logger.LogInformation($"Transaction with Hash {transaction.Hash?.ToString(true)} added to the TransactionPool.");
}
public override Script GenerateScriptSig(Script scriptPubKey, IKeyRepository keyRepo, ISigner signer)
{
var key = keyRepo.FindKey(scriptPubKey);
if(key == null)
return null;
var sig = signer.Sign(key);
return PayToPubkeyTemplate.Instance.GenerateScriptSig(sig);
}
internal void Sign(ISigner signer)
{
var sb = new StringBuilder();
WriteLicenseProperties(sb);
Signature = signer.Sign(sb.ToString());
}
public override Script GenerateScriptSig(Script scriptPubKey, IKeyRepository keyRepo, ISigner signer)
{
var multiSigParams = EscrowScriptBuilder.ExtractEscrowScriptPubKeyParameters(scriptPubKey);
TransactionSignature[] signatures = new TransactionSignature[2];
var keys =
multiSigParams
.EscrowKeys
.Select(p => keyRepo.FindKey(p.ScriptPubKey))
.ToArray();
if (keys.All(k => k == null))
{
var redeem = keyRepo.FindKey(multiSigParams.RedeemKey.ScriptPubKey);
if (redeem == null)
{
return(null);
}
return(new Script(Op.GetPushOp(signer.Sign(redeem).ToBytes())));
}
int sigCount = 0;
for (int i = 0; i < keys.Length; i++)
{
if (sigCount == 2)
{
break;
}
if (keys[i] != null)
{
var sig = signer.Sign(keys[i]);
signatures[i] = sig;
sigCount++;
}
}
IEnumerable <TransactionSignature> sigs = signatures;
if (sigCount == 2)
{
sigs = sigs.Where(s => s != TransactionSignature.Empty && s != null);
}
return(EscrowScriptBuilder.GenerateScriptSig(sigs.ToArray()));
}
private string GetSignature(DateTime utcNow)
{
GetRequestBuilder builder = new GetRequestBuilder(_builder);
builder.AddParam(_tKey, utcNow.ToString("s"));
string signature = _signer.Sign(Constants.GET_METHOD, Host, Path, builder.Build());
return(signature);
}
public override Script GenerateScriptSig(Script scriptPubKey, IKeyRepository keyRepo, ISigner signer)
{
var parameters = PayToPubkeyHashTemplate.Instance.ExtractScriptPubKeyParameters(scriptPubKey);
var key = keyRepo.FindKey(parameters.ScriptPubKey);
if(key == null)
return null;
var sig = signer.Sign(key);
return PayToPubkeyHashTemplate.Instance.GenerateScriptSig(sig, key.PubKey);
}
/// <summary>
/// <p><strong>Purpose:</strong></p> <p>This method processes the references and creates the digital signature
/// of the contents, and returns the whole XML Node of the signed contents. It produces an XmlNode
/// of type signature.</p>
/// <p>Note: Current implementation does not create a KeyInfoNode</p>
/// </summary>
/// <param name="references">references that we will be signing</param>
/// <param name="canonicalizer">the specific canonicalizer to use</param>
/// <param name="signer">the specific signer to use</param>
/// <param name="signID">Signature id</param>
/// <returns>Xml Node with digitally signed representation of the data</returns>
/// <exception cref="ArgumentNullException">if any element is null</exception>
/// <exception cref="SignatureManagerException">any internal exception thrown in this function
/// is wrapped up as SignatureManagerException</exception>
public XmlNode Sign(IList <IReference> references, InstantiationVO canonicalizer, InstantiationVO signer,
string signID)
{
//Validate not null
ExceptionHelper.ValidateNotNull(references, "references");
ExceptionHelper.ValidateNotNull(canonicalizer, "canonicalizer");
ExceptionHelper.ValidateNotNull(signer, "signer");
ExceptionHelper.ValidateNotNull(signID, "signID");
XmlDocument doc = new XmlDocument();
try
{
//Create Signature node
XmlNode signatureNode = doc.CreateNode(XmlNodeType.Element, "Signature", null);
//Create SignedInfo Node
XmlNode signedInfoNode = CreateSignedInfoNode(doc, canonicalizer, signer, references);
//Add an attribute representing default namespace to SignedInfo node
//since the two have the exact literal format
((XmlElement)signedInfoNode).SetAttribute("xmlns", DEF_XMLDSIG_NS);
//Get Canonicalizer and canonicalize
ICanonicalizer canonInst = registry.GetCanonicalizerInstance(canonicalizer.Key,
canonicalizer.Params);
string canonicalized = canonInst.BringToCanonicalForm(signedInfoNode.OuterXml);
//Add SignedInfo node to Signature node
signatureNode.InnerXml += canonicalized;
//Get Signer Instance, sign, assign to signatureValue node
ISigner signerInst = registry.GetSignerInstance(signer.Key, signer.Params);
string signed = signerInst.Sign(Encoding.UTF8.GetBytes(canonicalized));
XmlNode signValueNode = CreateSignatureValue(doc, signed);
//Append signatureValue to Signature node
signatureNode.InnerXml += signValueNode.OuterXml;
//Add an attribute representing default namespace to Signature node
XmlAttribute defNs = doc.CreateAttribute("xmlns");
defNs.Value = DEF_XMLDSIG_NS;
signatureNode.Attributes.Append(defNs);
//Add Id attribute to Signature node
XmlAttribute idAttr = doc.CreateAttribute("Id");
idAttr.Value = signID;
signatureNode.Attributes.Append(idAttr);
//Let default namespace takes effect
doc.LoadXml(signatureNode.OuterXml);
return(doc.DocumentElement);
}
catch (Exception ex)
{
throw new SignatureManagerException(SIGN_MAN_EXCP_MSG, ex);
}
}
protected byte[] Serialize(byte[] type, byte[] data)
{
byte[] payload = Bytes.Concat(type[0], data);
Keccak toSign = Keccak.Compute(payload);
Signature signature = _signer.Sign(_privateKey, toSign);
byte[] signatureBytes = Bytes.Concat(signature.Bytes, signature.RecoveryId);
byte[] mdc = Keccak.Compute(Bytes.Concat(signatureBytes, type, data)).Bytes;
return(Bytes.Concat(mdc, signatureBytes, type, data));
}
/// <summary>
/// Signs a token payload.
/// </summary>
/// <param name="payload"></param>
/// <param name="keyLevel"></param>
/// <returns></returns>
public Signature SignTokenPayload(TokenPayload payload, Level keyLevel)
{
ISigner signer = cryptoEngine.CreateSigner(keyLevel);
return(new Signature
{
KeyId = signer.GetKeyId(),
MemberId = MemberId,
Signature_ = signer.Sign(Stringify(payload, TokenAction.Endorsed))
});
}
/// <summary>
/// Creates new transaction.
/// </summary>
/// <returns>The transaction.</returns>
/// <param name="payload">Payload.</param>
public Transaction CreateTransaction(byte[] payload)
{
var header = new TransactionHeader();
header.FamilyName = settings.FamilyName;
header.FamilyVersion = settings.FamilyVersion;
header.Inputs.AddRange(settings.Inputs);
header.Outputs.AddRange(settings.Outputs);
header.Nonce = Guid.NewGuid().ToString();
header.SignerPublicKey = settings.SignerPublickey;
header.BatcherPublicKey = settings.BatcherPublicKey;
header.PayloadSha512 = payload.ToSha512().ToHexString();
var transaction = new Transaction();
transaction.Payload = ByteString.CopyFrom(payload);
transaction.Header = header.ToByteString();
transaction.HeaderSignature = signer.Sign(header.ToByteArray().ToSha256()).ToHexString();
return(transaction);
}
public override Script GenerateScriptSig(Network network, Script scriptPubKey, IKeyRepository keyRepo, ISigner signer)
{
Key key = keyRepo.FindKey(scriptPubKey);
if (key == null)
{
return(null);
}
TransactionSignature sig = signer.Sign(key);
return(PayToPubkeyTemplate.Instance.GenerateScriptSig(sig));
}
/*
* Подпиывает код
*/
private string GetSign(string code)
{
try
{
return(signer.Sign(code));
}
catch (CryptographyException e)
{
Log.WriteError(e);
return(null);
}
}
private void Sign()
{
try
{
Item.Signature = signer.Sign(Item.Content);
}
catch (CryptographyException ex)
{
Log.WriteError(ex);
Item.SetError(ex.Message, ServiceErrorType.CryptographyError);
}
}
public override Script GenerateScriptSig(Script scriptPubKey, IKeyRepository keyRepo, ISigner signer)
{
var key = keyRepo.FindKey(scriptPubKey);
if (key == null)
{
return(null);
}
var sig = signer.Sign(key);
return(PayToPubkeyTemplate.Instance.GenerateScriptSig(sig));
}
public override Script GenerateScriptSig(Network network, Script scriptPubKey, IKeyRepository keyRepo, ISigner signer)
{
KeyId parameters = PayToPubkeyHashTemplate.Instance.ExtractScriptPubKeyParameters(scriptPubKey);
Key key = keyRepo.FindKey(parameters.ScriptPubKey);
if (key == null)
{
return(null);
}
TransactionSignature sig = signer.Sign(key);
return(PayToPubkeyHashTemplate.Instance.GenerateScriptSig(sig, key.PubKey));
}
public override Script GenerateScriptSig(Script scriptPubKey, IKeyRepository keyRepo, ISigner signer)
{
var offer = SolverScriptBuilder.ExtractOfferScriptParameters(scriptPubKey);
var key = keyRepo.FindKey(offer.FulfillKey.ScriptPubKey) ?? keyRepo.FindKey(offer.RedeemKey.ScriptPubKey);
if (key == null)
{
return(null);
}
var sig = signer.Sign(key);
return(new Script(Op.GetPushOp(sig.ToBytes())));
}
public override Script GenerateScriptSig(Script scriptPubKey, IKeyRepository keyRepo, ISigner signer)
{
var parameters = PayToPubkeyHashTemplate.Instance.ExtractScriptPubKeyParameters(scriptPubKey);
var key = keyRepo.FindKey(parameters.ScriptPubKey);
if (key == null)
{
return(null);
}
var sig = signer.Sign(key);
return(PayToPubkeyHashTemplate.Instance.GenerateScriptSig(sig, key));
}
public string Sign(ISigner signer)
{
var json = ToJSON();
var data = Utilites.Base64EncodeString(json);
var signature = signer.Sign(data);
StringBuilder sb = new StringBuilder();
sb.Append(data);
sb.Append('.');
sb.Append(System.Convert.ToBase64String(signature));
return(sb.ToString());
}
/// <inheritdoc />
public override Script GenerateScriptSig(Network network, Script scriptPubKey, IKeyRepository keyRepo, ISigner signer)
{
ColdStakingScriptTemplate.Instance.ExtractScriptPubKeyParameters(scriptPubKey, out KeyId hotKey, out KeyId coldKey);
// The scriptPubKey will be different depending on whether we are spending or cold staking.
Key key = keyRepo.FindKey((this.usesColdPubKey ? coldKey : hotKey).ScriptPubKey);
if (key == null)
{
return(null);
}
TransactionSignature sig = signer.Sign(key);
return(ColdStakingScriptTemplate.Instance.GenerateScriptSig(sig, this.usesColdPubKey, key.PubKey));
}
public override void Sign(InputSigningContext inputSigningContext, IKeyRepository keyRepository, ISigner signer)
{
var scriptCode = inputSigningContext.Coin.GetScriptCode();
var key = keyRepository.FindKey(scriptCode) as PubKey;
if (key == null)
{
return;
}
var sig = signer.Sign(key) as TransactionSignature;
if (sig is null)
{
return;
}
inputSigningContext.Input.PartialSigs.TryAdd(key, sig);
}
private Block?Seal(Block block)
{
// Bail out if we're unauthorized to sign a block
if (!CanSeal(block.Number, block.ParentHash))
{
if (_logger.IsInfo)
{
_logger.Info($"Not authorized to seal the block {block.ToString(Block.Format.Short)}");
}
return(null);
}
BlockHeader header = block.Header;
// Sealing the genesis block is not supported
long number = header.Number;
if (number == 0)
{
throw new InvalidOperationException("Can't sign genesis block");
}
// For 0-period chains, refuse to seal empty blocks (no reward but would spin sealing)
if (_config.BlockPeriod == 0 && block.Transactions.Length == 0)
{
if (_logger.IsError)
{
_logger.Error($"Not sealing empty block on 0-period chain {block.Number}");
}
throw new InvalidOperationException("An attempt has been made to seal an empty block on a 0-period clique chain");
}
// Sign all the things!
Keccak headerHash = SnapshotManager.CalculateCliqueHeaderHash(header);
Signature signature = _signer.Sign(headerHash);
// Copy signature bytes (R and S)
var signatureBytes = signature.Bytes;
Array.Copy(signatureBytes, 0, header.ExtraData, header.ExtraData.Length - Clique.ExtraSealLength, signatureBytes.Length);
// Copy signature's recovery id (V)
byte recoveryId = signature.RecoveryId;
header.ExtraData[header.ExtraData.Length - 1] = recoveryId;
return(block);
}