//web server calls
/************************************************************************
* Mines a new block, sending the reward to the specified address
************************************************************************/
public string Mine(string address)
{
Logger.Log(string.Format("Mining for new block for ID={0}", address));
//Rudimentary consensus algorithm
//Resolve conflicts this and registered server nodes (ie. update the chain)
Consensus();
//create proof of work
int proof = CreateProofOfWork(_lastBlock.Proof, _lastBlock.PreviousHash);
//create a transaction object
Transaction tx = new Transaction();
tx.id = Guid.NewGuid(); //set a new ID for the transaction
tx.Inputs = new List <Input>(); //a list to hold the inputs to the transaction
tx.Outputs = new List <Output>(); //a list to hold the outputs from the transaction
tx.Outputs.Add(new Output(address, 10)); //add reward to the mine transaction
//sign the transaction with the server keys and add the public key so the signature can be checked
tx.Signature = _cryptoProvider.SignMessage(tx.ToString(), _privateKey, _publicKey);
tx.PublicKey = _publicKey.ToBase64String();
//create a new transaction containing the reward. IsMining == true, so there are no input nodes to validate
CreateTransaction(tx, true);
//create a new block (commit all uncommitted transactions, including the reward transaction)
Block block = CreateNewBlock(proof);
//create a response object, which will be serialized and returned
var response = new
{
Message = "New Block Forged",
Index = block.Index,
Transactions = block.Transactions.ToArray(),
Proof = block.Proof,
PreviousHash = block.PreviousHash
};
Logger.Log(string.Format("Mined new block Index={0}, Proof={1}, previous Hash={2}", block.Index, block.Proof, block.PreviousHash));
//serialize and return the response
return(JsonConvert.SerializeObject(response));
}
/*********************************************
* Creates a signature for an address string
*********************************************/
public static string SignAddress(string address, string salt, ICryptoProvider provider)
{
return(provider.SignMessage(salt + address));
}