/// <summary>
/// Implements brfc 759684b1a19a, paymentDestination: bsvalias Payment Addressing (Basic Address Resolution)
/// </summary>
/// <param name="key">Private key with which to sign this request. If null, signature will be blank. Else, must match public key returned by GetPubKey(senderHandle).</param>
/// <param name="receiverHandle"></param>
/// <param name="senderHandle"></param>
/// <param name="senderName"></param>
/// <param name="amount"></param>
/// <param name="purpose"></param>
/// <returns></returns>
public async Task <Script> GetOutputScript(PrivateKey key, string receiverHandle, string senderHandle, string senderName = null, Amount?amount = null, string purpose = "")
{
amount ??= Amount.Zero;
var dt = DateTime.UtcNow.ToString("o");
var message = $"{senderHandle}{amount.Value.Satoshis}{dt}{purpose}";
var signature = key?.SignMessageToBase64(message) ?? "";
// var ok = key.GetPubKey().VerifyMessage(message, signature);
var request = new GetOutputScriptRequest
{
SenderHandle = senderHandle,
Amount = amount.Value.Satoshis,
Timestamp = dt,
Purpose = purpose ?? "",
SenderName = senderName ?? "",
Signature = signature
};
var url = await GetAddressUrl(receiverHandle);
var json = JObject.FromObject(request);
var response = await PostAsync(url, json);
// e.g. {"output":"76a914bdfbe8a16162ba467746e382a081a1857831811088ac"}
var outputScript = JsonConvert.DeserializeObject <GetOutputScriptResponse>(response);
return(new Script(outputScript.Output));
}
/// <summary>
/// Implements brfc 759684b1a19a, paymentDestination: bsvalias Payment Addressing (Basic Address Resolution)
///
/// </summary>
/// <param name="key">Private key with which to sign this request. If null, signature will be blank. Else, must match public key returned by GetPubKey(senderHandle).</param>
/// <param name="receiverHandle"></param>
/// <param name="senderHandle"></param>
/// <param name="senderName"></param>
/// <param name="amount"></param>
/// <param name="purpose"></param>
/// <returns></returns>
public async Task <KzScript> GetOutputScript(KzPrivKey key, string receiverHandle, string senderHandle, string senderName = null, KzAmount?amount = null, string purpose = null)
{
if (!amount.HasValue)
{
amount = KzAmount.Zero;
}
var dt = DateTime.UtcNow.ToString("o");
var message = $"{senderHandle}{amount.Value.Satoshis}{dt}{purpose}";
var signature = key?.SignMessageToB64(message);
// var ok = key.GetPubKey().VerifyMessage(message, signature);
var request = new GetOutputScriptRequest
{
senderHandle = senderHandle,
amount = amount.Value.Satoshis,
dt = dt,
purpose = purpose ?? "",
senderName = senderName ?? "",
signature = signature ?? ""
};
var jsonContent = JsonConvert.SerializeObject(request);
var httpContent = new StringContent(jsonContent, Encoding.UTF8, "application/json");
var uri = await GetAddressUrl(receiverHandle);
var rm = await _HttpClient.PostAsync(uri, httpContent);
if (rm.StatusCode == HttpStatusCode.OK)
{
var response = await rm.Content.ReadAsStringAsync();
// e.g. {"output":"76a914bdfbe8a16162ba467746e382a081a1857831811088ac"}
var r = JsonConvert.DeserializeObject <GetOutputScriptResponse>(response);
var s = new KzScript(r.output);
return(s);
}
if (rm.StatusCode == HttpStatusCode.NotFound)
{
throw new ArgumentException($"Paymail \"{receiverHandle}\" was not found by this service.");
}
throw new Exception($"Unhandled HTTP Post StatusCode {rm.StatusCode}.");
}
