///<summary>Private: User payment operation</summary>
///<param name="amount">Payment amount</param>
///<param name="destination">Receiver keypair</param>
///<returns>Promise returns payment operation</returns>
async private Task <Stellar.Operation> UserPaymentOp(decimal amount, Stellar.KeyPair destination)
{
var asset = await new Client().StellarAsset();
var payment = new Stellar.PaymentOperation
.Builder(destination, asset.Asset, amount.ToString())
.SetSourceAccount(UserKeypair())
.Build();
return(payment);
}
async private Task <Stellar.Transaction> GenerateSignedTransaction(Stellar.KeyPair keypair)
{
long randomSequence = (long)(99999999 - Math.Floor((decimal) new Random().Next() * 65536));
Stellar.Account account = new Stellar.Account(keypair, randomSequence);
Stellar.Transaction.Builder txBuilder = new Stellar.Transaction.Builder(account);
StellarResponses.AssetResponse asset = await new Library.Client().StellarAsset();
Stellar.Operation op = new Stellar.PaymentOperation.Builder(keypair, asset.Asset, "0.000001").Build();
Stellar.Transaction tx = txBuilder.AddOperation(op).Build();
tx.Sign(keypair);
return(Stellar.Transaction.FromEnvelopeXdr(tx.ToEnvelopeXdr()));
}
///<summary>Generates challenge transaction signed by developers private key.</summary>
///<param name="developerSecret">Developers secret seed</param>
///<param name="expireIn">Session expiration time in seconds from now. Default is Client.ChallengeExpiresIn.</param>
///<returns>Returns base64-encoded transaction envelope</returns>
public string Call(string developerSecret, int expireIn = 0)
{
if (expireIn == 0)
{
expireIn = Client.ChallengeExpiresIn;
}
var keypair = this.Keypair(developerSecret);
var account = new Stellar.Account(keypair, this.RandomSequence());
var operation =
new Stellar.PaymentOperation.Builder(keypair, new Stellar.AssetTypeNative(), "0.000001")
.SetSourceAccount(Stellar.KeyPair.Random())
.Build();
var tx = new Stellar.Transaction.Builder(account)
.AddMemo(this.Memo())
.AddTimeBounds(this.BuildTimeBounds(expireIn))
.AddOperation(operation)
.Build();
tx.Sign(keypair);
return(tx.ToEnvelopeXdrBase64());
}
