private async Task <(string, decimal)> ProcessAccountMergeAsync(HorizonAccountOperation operation, string address)
{
var tx = await _client.GetTransactionAsync(operation.TransactionHash);
var xdr = Convert.FromBase64String(tx.ResultMetaXdr);
var reader = new XdrDataInputStream(xdr);
var txMeta = TransactionMeta.Decode(reader);
var mergeMeta = txMeta.Operations.First
(
op => op.Changes.InnerValue.Any
(
c => c.Discriminant.InnerValue == LedgerEntryChangeType.LedgerEntryChangeTypeEnum.LEDGER_ENTRY_REMOVED &&
KeyPair.FromXdrPublicKey(c.Removed.Account.AccountID.InnerValue).Address == operation.SourceAccount
)
);
var sourceAccountStateMeta = mergeMeta.Changes.InnerValue
.First
(
c => c.Discriminant.InnerValue == LedgerEntryChangeType.LedgerEntryChangeTypeEnum.LEDGER_ENTRY_STATE &&
KeyPair.FromXdrPublicKey(c.State.Data.Account.AccountID.InnerValue).Address == operation.SourceAccount
);
var amount = sourceAccountStateMeta.State.Data.Account.Balance.InnerValue * _nativeAssetMultiplier;
if (address.Equals(operation.Into, StringComparison.InvariantCultureIgnoreCase))
{
return(_nativeAssetCode, amount);
}
return(_nativeAssetCode, -amount);
}
private (string, decimal) ProcessPayment(HorizonAccountOperation operation, string address)
{
var amount = decimal.Parse(operation.Amount, CultureInfo.InvariantCulture);
if (address.Equals(operation.To, StringComparison.InvariantCultureIgnoreCase))
{
return(GetAsset(operation), amount);
}
return(GetAsset(operation), -amount);
}
private (string, decimal) ProcessCreateAccount(HorizonAccountOperation operation, string address)
{
var amount = decimal.Parse(operation.StartingBalance, CultureInfo.InvariantCulture);
if (address.Equals(operation.Account, StringComparison.InvariantCultureIgnoreCase))
{
return(_nativeAssetCode, amount);
}
return(_nativeAssetCode, -amount);
}
private string GetAsset(HorizonAccountOperation operation)
{
var asset = operation.AssetType == "native"
? _nativeAssetCode
: operation.AssetCode;
if (string.IsNullOrWhiteSpace(asset))
{
throw new InvalidOperationException($"Unknown asset code. Asset type is: {operation.AssetType}");
}
return(asset);
}
private (string Asset, decimal Value) ProcessChangeTrust(HorizonAccountOperation operation, string address)
{
return(GetAsset(operation), 0M);
}