public static CetSigs ParseFromTLV(TLVReader reader)
{
CetSigs cet = new CetSigs();
using (var r = reader.StartReadRecord())
{
if (r.Type != AdaptorSigsTLVType)
{
throw new FormatException("Invalid TLV type, expected adaptor sigs");
}
List <AdaptorSignature> sigs = new List <AdaptorSignature>();
while (!r.IsEnd)
{
sigs.Add(AdaptorSignature.ParseFromTLV(reader));
}
cet.OutcomeSigs = sigs.ToArray();
}
Span <byte> buf = stackalloc byte[64];
reader.ReadBytes(buf);
if (!ECDSASignature.TryParseFromCompact(buf, out var sig))
{
throw new FormatException("Invalid DER signature");
}
cet.RefundSig = sig;
return(cet);
}
public void SerializeDeserializeCompact(ECDSASignature signature)
{
var b = signature.ToCompact();
ECDSASignature.TryParseFromCompact(b, out var signature2);
Assert.True(signature.ToDER().SequenceEqual(signature2.ToDER()));
}
private BOLT11PaymentRequest(string str, Network network)
{
if (str == null)
{
throw new ArgumentNullException(nameof(str));
}
if (network == null)
{
throw new ArgumentNullException(nameof(network));
}
_str = str.ToLowerInvariant().Trim();
if (str.StartsWith("lightning:", StringComparison.OrdinalIgnoreCase))
{
str = str.Substring("lightning:".Length);
}
var decoded = InternalBech32Encoder.Instance.DecodeData(str);
var hrp = decoded.HumanReadablePart.ToLowerInvariant();
Prefix = hrp;
MinimumAmount = LightMoney.Zero;
if (Prefix.Length == 0)
{
throw new FormatException("Invalid BOLT11: No prefix");
}
ulong amount = 0;
int firstNumberIndex = -1;
for (int i = 0; i < Prefix.Length; i++)
{
int digit = Array.IndexOf(digits, Prefix[i]);
if (digit != -1)
{
if (firstNumberIndex == -1)
{
firstNumberIndex = i;
}
amount *= 10;
amount += (uint)digit;
}
else if (firstNumberIndex != -1)
{
break;
}
}
if (firstNumberIndex != -1)
{
LightMoneyUnit unit = LightMoneyUnit.BTC;
switch (Prefix[Prefix.Length - 1])
{
case 'm':
unit = LightMoneyUnit.MilliBTC;
break;
case 'u':
unit = LightMoneyUnit.Micro;
break;
case 'n':
unit = LightMoneyUnit.Nano;
break;
case 'p':
unit = LightMoneyUnit.MilliSatoshi;
if (amount % 10 != 0)
{
throw new FormatException("Pico BTC denomination which is not a multiple of 10 is not supported by BTCPayServer.Lightning");
}
amount = amount / 10UL;
break;
default:
if (Array.IndexOf(digits, Prefix[Prefix.Length - 1]) == -1)
{
throw new FormatException("Invalid BOLT11: invalid amount multiplier");
}
unit = LightMoneyUnit.BTC;
break;
}
MinimumAmount = LightMoney.FromUnit(amount, unit);
Prefix = Prefix.Substring(0, firstNumberIndex);
if (Prefix.Length == 0)
{
throw new FormatException("Invalid BOLT11: No prefix");
}
}
if (_Prefixes.TryGetValue((network.NetworkSet.CryptoCode, network.ChainName), out var expectedPrefix) &&
expectedPrefix != Prefix)
{
throw new FormatException("Invalid BOLT11: Invalid prefix");
}
var bitArray = new BitArray(decoded.Data.Length * 5);
for (int di = 0; di < decoded.Data.Length; di++)
{
bitArray.Set(di * 5 + 0, ((decoded.Data[di] >> 4) & 0x01) == 1);
bitArray.Set(di * 5 + 1, ((decoded.Data[di] >> 3) & 0x01) == 1);
bitArray.Set(di * 5 + 2, ((decoded.Data[di] >> 2) & 0x01) == 1);
bitArray.Set(di * 5 + 3, ((decoded.Data[di] >> 1) & 0x01) == 1);
bitArray.Set(di * 5 + 4, ((decoded.Data[di] >> 0) & 0x01) == 1);
}
var reader = new BitReader(bitArray);
reader.Position = reader.Count - 520 - 30;
if (reader.Position < 0)
{
throw new FormatException("Invalid BOLT11: Invalid size");
}
if (!reader.CanConsume(65))
{
throw new FormatException("Invalid BOLT11: Invalid size");
}
var rs = reader.ReadBytes(64);
_Signature = rs;
if (!ECDSASignature.TryParseFromCompact(rs, out var s) || s is null)
{
throw new FormatException("Invalid BOLT11: Invalid ECDSA signature");
}
ECDSASignature = s;
RecoveryId = reader.ReadBytes(1)[0];
reader.Position = 0;
Timestamp = Utils.UnixTimeToDateTime(reader.ReadULongBE(35));
void AssertSize(int c)
{
if (!reader.CanConsume(c))
{
throw new FormatException("Invalid BOLT11: invalid size");
}
}
ExpiryDate = Timestamp + TimeSpan.FromHours(1);
MinFinalCLTVExpiry = 9;
var fallbackAddresses = new List <BitcoinAddress>();
var routes = new List <RouteInformation>();
var features = FeatureBits.None;
while (reader.Position != reader.Count - 520 - 30)
{
AssertSize(5 + 10);
var tag = (Bolt11FieldType)reader.ReadULongBE(5);
var size = (int)(reader.ReadULongBE(10) * 5);
AssertSize(size);
var afterReadPosition = reader.Position + size;
switch (tag)
{
case Bolt11FieldType.P:
if (size != 52 * 5)
{
break;
}
if (PaymentHash != null)
{
throw new FormatException("Invalid BOLT11: Duplicate 'p'");
}
PaymentHash = new uint256(reader.ReadBytes(32), false);
break;
case Bolt11FieldType.X:
ExpiryDate = Timestamp + TimeSpan.FromSeconds(reader.ReadULongBE(size));
break;
case Bolt11FieldType.D:
var bytesCount = size / 8;
var bytes = reader.ReadBytes(bytesCount);
try
{
ShortDescription = UTF8NoBOM.GetString(bytes, 0, bytesCount);
}
catch
{
}
break;
case Bolt11FieldType.S:
if (size != 52 * 5)
{
break;
}
if (PaymentSecret != null)
{
throw new FormatException("Invalid BOLT11: Duplicate 's'");
}
PaymentSecret = new uint256(reader.ReadBytes(32), false);
break;
case Bolt11FieldType.N:
if (size != 53 * 5)
{
break;
}
ExplicitPayeePubKey = new PubKey(reader.ReadBytes(33));
break;
case Bolt11FieldType.C:
var value = reader.ReadULongBE(size);
if (value > int.MaxValue)
{
break;
}
MinFinalCLTVExpiry = (int)value;
break;
case Bolt11FieldType.F:
if (size < 5)
{
break;
}
var version = reader.ReadULongBE(5);
switch (version)
{
case 0:
if (size == 5 + (20 * 8))
{
fallbackAddresses.Add(new BitcoinWitPubKeyAddress(new WitKeyId(reader.ReadBytes(20)), network));
}
else if (size == 5 + (32 * 8) + 4)
{
fallbackAddresses.Add(new BitcoinWitScriptAddress(new WitScriptId(reader.ReadBytes(32)), network));
}
break;
case 17:
if (size != 5 + (20 * 8))
{
break;
}
fallbackAddresses.Add(new BitcoinPubKeyAddress(new KeyId(reader.ReadBytes(20)), network));
break;
case 18:
if (size != 5 + (20 * 8))
{
break;
}
fallbackAddresses.Add(new BitcoinScriptAddress(new ScriptId(reader.ReadBytes(20)), network));
break;
default:
break;
}
break;
case Bolt11FieldType.H:
if (size != 52 * 5)
{
break;
}
DescriptionHash = new uint256(reader.ReadBytes(32), false);
break;
case Bolt11FieldType.R:
if (size < 264 + 64 + 32 + 32 + 16)
{
break;
}
var positionBefore = reader.Position;
var routeInformation = new RouteInformation(reader, size);
var readen = reader.Position - positionBefore;
if (size - readen >= 5)
{
break;
}
routes.Add(routeInformation);
break;
case Bolt11FieldType.Nine:
if (size < 5)
{
break;
}
// Read which feature bits are set from right-to-left.
for (var i = size - 1; i >= 0; i--)
{
if (reader.Read())
{
features |= (FeatureBits)(1 << i);
}
}
break;
}
var skip = afterReadPosition - reader.Position;
if (skip < 0)
{
throw new FormatException("Invalid BOLT11: Invalid size");
}
reader.Consume(skip);
}
reader = new BitReader(bitArray, bitArray.Count - 520 - 30);
int byteCount = Math.DivRem(reader.Count, 8, out var remainder);
if (remainder != 0)
{
byteCount++;
}
var hashedData = UTF8NoBOM.GetBytes(hrp).Concat(reader.ReadBytes(byteCount)).ToArray();
Hash = new uint256(Hashes.SHA256(hashedData));
Routes = routes;
FallbackAddresses = fallbackAddresses;
FeatureBits = features;
}