private async Task <string> SignIfRequiredAsync <T>(T response)
{
string payload = HelperTools.JSONSerialize(response, false);
if (minerId == null)
{
// Do not sign if we do not have miner id
return(payload);
}
lastMinerId ??= await minerId.GetCurrentMinerIdAsync();
async Task <JsonEnvelope> TryToSign()
{
async Task <(string signature, string publicKey)> signWithMinerId(string sigHashHex)
{
var signature = await minerId.SignWithMinerIdAsync(lastMinerId, sigHashHex);
return(signature, lastMinerId);
}
var envelope = await JsonEnvelopeSignature.CreateJSonSignatureAsync(payload, signWithMinerId);
// Verify a signature - some implementation might have incorrect race conditions when rotating the keys
if (!JsonEnvelopeSignature.VerifySignature(envelope))
{
return(null);
}
return(envelope);
}
var jsonEnvelope = await TryToSign();
if (jsonEnvelope == null)
{
throw new Exception("Error while validating signature. Possible reason: incorrect configuration or key rotation");
}
return(HelperTools.JSONSerialize(new SignedPayloadViewModel(jsonEnvelope), true));
}
/// <summary>
/// Signs response if required. If response already contains minerId (for example as part of policy quote), pass it in as currentMinerId
/// To make sure that correct key is used even key rotation just occured
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="response"></param>
/// <param name="responseMinerId"></param>
/// <returns></returns>
async Task <ActionResult> SignIfRequiredAsync <T>(T response, string responseMinerId)
{
string payload = HelperTools.JSONSerialize(response, false);
if (string.IsNullOrEmpty(responseMinerId))
{
// Do not sing if we do not have miner id
return(Ok(new JSONEnvelopeViewModel(payload)));
}
async Task <(string signature, string publicKey)> SignWithMinerId(string sigHashHex)
{
var signature = await minerId.SignWithMinerIdAsync(responseMinerId, sigHashHex);
return(signature, responseMinerId);
}
var jsonEnvelope = await JsonEnvelopeSignature.CreateJSonSignatureAsync(payload, SignWithMinerId);
var ret = new SignedPayloadViewModel(jsonEnvelope);
return(Ok(ret));
}
static async Task SendTransactionsBatch(IEnumerable <string> transactions, HttpClient client, Stats stats, string url, string callbackUrl, string callbackToken, string callbackEncryption)
{
var query = new List <string>();
string doCallbacks = string.IsNullOrEmpty(callbackUrl) ? "false" : "true";
query.Add($"defaultDsCheck={doCallbacks}");
query.Add($"defaultMerkleProof={doCallbacks}");
if (!string.IsNullOrEmpty(callbackUrl))
{
query.Add("defaultCallbackUrl=" + WebUtility.UrlEncode(callbackUrl));
if (!string.IsNullOrEmpty(callbackToken))
{
query.Add("defaultCallbackToken=" + WebUtility.UrlEncode(callbackToken));
}
if (!string.IsNullOrEmpty(callbackEncryption))
{
query.Add("defaultCallbackEncryption=" + WebUtility.UrlEncode(callbackEncryption));
}
}
string queryString = string.Join("&", query.ToArray());
var ub = new UriBuilder(url);
if (ub.Query.Length == 0)
{
ub.Query = queryString; // automatically adds ? at the beginning
}
else
{
ub.Query = ub.Query.Substring(1) + "&" + queryString; // remove leading ? it is added back automatically
}
string urlWithParams = ub.Uri.ToString();
string callbackHost = "";
if (!string.IsNullOrEmpty(callbackUrl))
{
callbackHost = new Uri(callbackUrl).Host;
}
// We currently submit through REST interface., We could also use binary interface
var request = transactions.Select(t => new SubmitTransactionViewModel
{
RawTx = t,
// All other parameters are passed in query string
CallbackUrl = null,
CallbackToken = null,
CallbackEncryption = null,
MerkleProof = null,
DsCheck = null
}).ToArray();
var requestString = HelperTools.JSONSerialize(request, false);
var response = await client.PostAsync(urlWithParams,
new StringContent(requestString, new UTF8Encoding(false), MediaTypeNames.Application.Json));
var responseAsString = await response.Content.ReadAsStringAsync();
if (!response.IsSuccessStatusCode)
{
Console.WriteLine($"Error while submitting transaction request {responseAsString}");
stats.IncrementRequestErrors();
}
else
{
var rEnvelope = HelperTools.JSONDeserialize <SignedPayloadViewModel>(responseAsString);
var r = HelperTools.JSONDeserialize <SubmitTransactionsResponseViewModel>(rEnvelope.Payload);
int printLimit = 10;
var errorItems = r.Txs.Where(t => t.ReturnResult != "success").ToArray();
var okItems = r.Txs.Where(t => t.ReturnResult == "success").ToArray();
stats.AddRequestTxFailures(callbackHost, errorItems.Select(x => new uint256(x.Txid)));
stats.AddOkSubmited(callbackHost, okItems.Select(x => new uint256(x.Txid)));
var errors = errorItems
.Select(t => t.Txid + " " + t.ReturnResult + " " + t.ResultDescription).ToArray();
var limitedErrors = string.Join(Environment.NewLine, errors.Take(printLimit));
if (errors.Any())
{
Console.WriteLine($"Error while submitting transactions. Printing up to {printLimit} out of {errors.Length} errors : {limitedErrors}");
}
}
}