//https://github.com/libbitcoin/libbitcoin/blob/master/test/stealth.cpp
public void BitFieldCorrectlyMatchData()
{
var bit = (uint)1358086238;
var o = new BitField(bit, 32);
var tests = new[]
{
new
{
Encoded = (uint)0x691cf48b,
BitCount = 27,
Data = "8bf42c79",
Match = false
},
new
{
Encoded = (uint)0x691cf48b,
BitCount = 27,
//Data miss match (1 instead of 2)
Data = "8bf41c79",
Match = true
}
};
foreach(var test in tests)
{
BitField field = new BitField(test.Encoded, test.BitCount);
Assert.Equal(test.Match, field.Match(Utils.ToUInt32(TestUtils.ParseHex(test.Data), true)));
}
}
public static StealthMetadata CreateMetadata(Key ephemKey, BitField bitField = null)
{
for(uint nonce = 0 ; nonce < uint.MaxValue ; nonce++)
{
var metadata = new StealthMetadata(ephemKey, nonce);
if(bitField == null || bitField.Match(metadata.BitField))
return metadata;
}
throw new ArgumentException("No nonce can satisfy the given bitfield, use another ephemKey");
}
//https://wiki.unsystem.net/index.php/DarkWallet/Stealth#Bitfield_value
public void BitFieldCorrectlyInterpreted()
{
var tests = new[]
{
new
{
Encoded = (uint)1763505291,
BitCount = 32,
Raw = "8bf41c69"
},
new
{
Encoded = (uint)1,
BitCount = 8,
Raw = "0100"
},
new
{
Encoded = (uint)1,
BitCount = 7,
Raw = "01"
}
};
foreach(var test in tests)
{
var bitField = new BitField(test.Encoded, test.BitCount);
Assert.Equal(TestUtils.ParseHex(test.Raw), bitField.GetRawForm());
Assert.Equal(test.Encoded, bitField.GetEncodedForm());
bitField = new BitField(TestUtils.ParseHex(test.Raw), test.BitCount);
Assert.Equal(test.Encoded, bitField.GetEncodedForm());
Assert.Equal(TestUtils.ParseHex(test.Raw), bitField.GetRawForm());
}
}
//https://github.com/libbitcoin/libbitcoin/blob/master/test/stealth.cpp
public void BitFieldCanFetchTransaction()
{
var tests = new[]
{
new
{
Encoded = "deadbeef",
BitCount = 5,
Transaction = "0100000001bd365d65c6eeee2d3ae29c6e1b0fb22f70f0135220eac1273c92a13b6039ecdf000000006b48304502202551626a52a088ea585f2aaa8afe1c1b7bc52ea8e577e149f20f0f5f2fc54485022100913643c6a1e54b5284d1c108519d9243213373256ff95ab6c7e3d162175c9e28012102881c1427e826f230246197f7f693f1c923ad2afea1dad901d1c870f7e310c895ffffffff020000000000000000286a2606ab3099ae0359222b4a2dd9a21ebd70331794fb05b0bd605bd9660fdf895906b1a227edcbec306c3402000000001976a9142f62432f367dc3cf67e68f814cc2a3ed5b2e8cec88ac00000000",
}
,new
{
Encoded = "deadbeef",
BitCount = 5,
Transaction = "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",
},
new
{
Encoded = "deadbeef",
BitCount = 5,
Transaction = "010000000288b6952f8357b5a8271f6c0608ea779549bf0a9ae72213ce433f7a9c90190be6000000006b4830450221008b1b7369d7bf8a1dd99e6a260ef969840d633ba81fc379bf4f5469afd3b288e2022077e21dd12c1d8b2a4ab2e58fb0113b9e3bb77db4439483f7a8311cac3ad6ce9a012102b0c2eb0cc505a4c9fb62df8a7fcdcc00ddab43ff5752ebc51a0dae11fbfb0648ffffffff4ca2f8960e17b56e690739158994ed23427ffc08445ba3223edacb322db12d4b000000006b483045022100f94d50d846d85a545693574f9e1a680a858f085257c827cd8b211df8d27c558202201bca0407ad67960937999a88c95e52417442703a16036bbe55f071cdff804f69012102884d0c845bff3158e88033bce236cdbfeadba0a7e7381258379612f355681d6dffffffff052f750000000000001976a914a34a179dc97cbb84992d2960ee240b56f1b2ae3088acbca15400000000001976a914139e314f94a8e4fc2864ef2544e7640ba033725b88ac0000000000000000286a26061d6b629c024c7daf682da4afd61aadf401fae316a265c3244d912b375a75b55551d52a583f2f750000000000001976a9142888cb9f0b0f489106bc13f56fdd2ceec1b6883788ac51c30000000000001976a91404316e7db781481d1419feda2c8d7fa9f7b68a6e88ac00000000",
},
};
foreach(var test in tests)
{
var field = new BitField(TestUtils.ParseHex(test.Encoded), test.BitCount);
Transaction transaction = new Transaction();
transaction.FromBytes(TestUtils.ParseHex(test.Transaction));
var stealthOutput = field.GetPayments(transaction).FirstOrDefault();
Assert.NotNull(stealthOutput);
Assert.True(field.Match(stealthOutput.Metadata.BitField));
}
}
private static byte[] GenerateBytes(PubKey scanKey, PubKey[] pubKeys, BitField bitField, int signatureCount)
{
MemoryStream ms = new MemoryStream();
ms.WriteByte(0); //Options
ms.Write(scanKey.Compress().ToBytes(), 0, 33);
ms.WriteByte((byte)pubKeys.Length);
foreach(var key in pubKeys)
{
ms.Write(key.Compress().ToBytes(), 0, 33);
}
ms.WriteByte((byte)signatureCount);
if(bitField == null)
ms.Write(new byte[] { 0 }, 0, 1);
else
{
ms.WriteByte((byte)bitField.BitCount);
var raw = bitField.GetRawForm();
ms.Write(raw, 0, raw.Length);
}
return ms.ToArray();
}
public BitcoinStealthAddress(PubKey scanKey, PubKey[] pubKeys, int signatureCount, BitField bitfield, Network network)
: base(GenerateBytes(scanKey, pubKeys, bitfield, signatureCount), network)
{
}
public BitcoinStealthAddress(PubKey scanKey, PubKey[] pubKeys, int signatureCount, BitField bitfield, Network network)
: base(GenerateBytes(scanKey, pubKeys, bitfield, signatureCount), network)
{
}
