/// <summary>
/// Builds and configures Centaurus vault
/// </summary>
/// <returns>Transaction cursor</returns>
private async Task <long> BuildAndConfigureVault(stellar_dotnet_sdk.responses.AccountResponse vaultAccount)
{
var majority = MajorityHelper.GetMajorityCount(constellationInitInfo.Auditors.Count());
var sourceAccount = await StellarAccountHelper.GetStellarAccount(vaultAccount.KeyPair);
var transactionBuilder = new TransactionBuilder(sourceAccount);
transactionBuilder.SetFee(10_000);
var existingTrustlines = vaultAccount.Balances
.Where(b => b.Asset is stellar_dotnet_sdk.AssetTypeCreditAlphaNum)
.Select(b => b.Asset)
.Cast <stellar_dotnet_sdk.AssetTypeCreditAlphaNum>();
foreach (var a in constellationInitInfo.Assets)
{
var asset = a.ToAsset() as stellar_dotnet_sdk.AssetTypeCreditAlphaNum;
if (asset == null) //if null than asset is stellar_dotnet_sdk.AssetTypeNative
{
throw new InvalidOperationException("Native assets are supported by default."); //better to throw exception to avoid confusions with id
}
if (existingTrustlines.Any(t => t.Code == asset.Code && t.Issuer == asset.Issuer))
{
continue;
}
var trustOperation = new ChangeTrustOperation.Builder(asset, "922337203685.4775807");
transactionBuilder.AddOperation(trustOperation.Build());
}
var optionOperationBuilder = new SetOptionsOperation.Builder()
.SetMasterKeyWeight(0)
.SetLowThreshold(majority)
.SetMediumThreshold(majority)
.SetHighThreshold(majority);
transactionBuilder.AddOperation(optionOperationBuilder.Build());
foreach (var signer in constellationInitInfo.Auditors)
{
transactionBuilder.AddOperation(new SetOptionsOperation.Builder().SetSigner(Signer.Ed25519PublicKey(signer), 1).Build());
}
var transaction = transactionBuilder.Build();
transaction.Sign(Global.Settings.KeyPair);
var result = await Global.StellarNetwork.Server.SubmitTransaction(transaction);
if (!result.IsSuccess())
{
throw new Exception($"Transaction failed. Result Xdr: {result.ResultXdr}");
}
var tx = await Global.StellarNetwork.Server.Transactions.Transaction(result.Hash);
return(long.Parse(tx.PagingToken));
}
private async Task <stellar_dotnet_sdk.responses.AccountResponse> DoesAlphaAccountExist()
{
try
{
return(await StellarAccountHelper.GetStellarAccount(Global.Settings.KeyPair));
}
catch (HttpResponseException exc)
{
if (exc.StatusCode == 404)
{
return(null);
}
throw;
}
}