private bool ReadScript(Script script)
{
var bytes = script.ToBytes(true);
if(bytes.Length == 0 || bytes[0] != (byte)OpcodeType.OP_RETURN)
return false;
foreach(var op in script.ToOps())
{
if(op.PushData != null && !op.IsInvalid)
{
if(ReadData(op.PushData))
return true;
}
}
return false;
}
private static bool Fill(StealthMetadata output, Script metadata)
{
var ops = metadata.ToOps().ToArray();
if(ops.Length != 2 || ops[0].Code != OpcodeType.OP_RETURN)
return false;
var data = ops[1].PushData;
if(data == null || data.Length != 1 + 4 + 33)
return false;
MemoryStream ms = new MemoryStream(data);
output.Version = ms.ReadByte();
if(output.Version != 6)
return false;
output.Nonce = ms.ReadBytes(4);
output.EphemKey = new PubKey(ms.ReadBytes(33));
output.Script = metadata;
output.Hash = Hashes.Hash256(data);
var msprefix = new MemoryStream(output.Hash.ToBytes(false));
output.BitField = Utils.ToUInt32(msprefix.ReadBytes(4), true);
return true;
}
/// <summary>
/// Register the specified ScriptPubKey
/// </summary>
/// <param name="scriptPubKey">The ScriptPubKey</param>
/// <param name="isRedeemScript">If true, the P2SH of the destination's script will be tracked (Default: false)</param>
/// <param name="isInternal">If true, the scriptPubKey will not belong to tracked data, typically, change addresses (Default: false)</param>
/// <param name="filter">The filter in which this key will appear (http://eprint.iacr.org/2014/763.pdf)</param>
/// <param name="wallet">The wallet name to which it belongs</param>
public bool Add(Script scriptPubKey, bool isRedeemScript = false, bool isInternal = false, string filter = "a", string wallet = "default")
{
if(filter == null)
throw new ArgumentNullException("filter");
if(wallet == null)
throw new ArgumentNullException("wallet");
Script redeem = isRedeemScript ? scriptPubKey : null;
scriptPubKey = isRedeemScript ? scriptPubKey.Hash.ScriptPubKey : scriptPubKey;
var data = scriptPubKey.ToOps().First(o => o.PushData != null).PushData;
var trackedScript = new TrackedScript()
{
ScriptPubKey = scriptPubKey,
RedeemScript = redeem,
AddedDate = DateTimeOffset.UtcNow,
IsInternal = isInternal,
Filter = filter,
Wallet = wallet
};
bool added = false;
lock(cs)
{
added = _TrackedScripts.TryAdd(trackedScript.GetId(), trackedScript);
}
return added;
}