| | | 1 | | using NBitcoin; |
| | | 2 | | |
| | | 3 | | namespace NLightning.Bolt11.Models.TaggedFields; |
| | | 4 | | |
| | | 5 | | using Constants; |
| | | 6 | | using Domain.Utils; |
| | | 7 | | using Enums; |
| | | 8 | | using Interfaces; |
| | | 9 | | |
| | | 10 | | /// <summary> |
| | | 11 | | /// Tagged field for the payee public key |
| | | 12 | | /// </summary> |
| | | 13 | | /// <remarks> |
| | | 14 | | /// The payee public key is a 33-byte public key used to identify the payee |
| | | 15 | | /// </remarks> |
| | | 16 | | /// <seealso cref="ITaggedField"/> |
| | | 17 | | internal sealed class PayeePubKeyTaggedField : ITaggedField |
| | | 18 | | { |
| | 516 | 19 | | public TaggedFieldTypes Type => TaggedFieldTypes.PayeePubKey; |
| | 120 | 20 | | internal PubKey Value { get; } |
| | 96 | 21 | | public short Length => TaggedFieldConstants.PayeePubkeyLength; |
| | | 22 | | |
| | | 23 | | /// <summary> |
| | | 24 | | /// Initializes a new instance of the <see cref="ExpiryTimeTaggedField"/> class. |
| | | 25 | | /// </summary> |
| | | 26 | | /// <param name="value">The Expiry Time in seconds</param> |
| | 128 | 27 | | internal PayeePubKeyTaggedField(PubKey value) |
| | | 28 | | { |
| | 128 | 29 | | Value = value; |
| | 128 | 30 | | } |
| | | 31 | | |
| | | 32 | | /// <inheritdoc/> |
| | | 33 | | public void WriteToBitWriter(BitWriter bitWriter) |
| | | 34 | | { |
| | | 35 | | // Write data |
| | 32 | 36 | | bitWriter.WriteBits(Value.ToBytes(), Length * 5); |
| | 32 | 37 | | } |
| | | 38 | | |
| | | 39 | | /// <inheritdoc/> |
| | | 40 | | public bool IsValid() |
| | | 41 | | { |
| | 68 | 42 | | return true; |
| | | 43 | | } |
| | | 44 | | |
| | | 45 | | /// <summary> |
| | | 46 | | /// Reads a PayeePubKeyTaggedField from a BitReader |
| | | 47 | | /// </summary> |
| | | 48 | | /// <param name="bitReader">The BitReader to read from</param> |
| | | 49 | | /// <param name="length">The length of the field</param> |
| | | 50 | | /// <returns>The PayeePubKeyTaggedField</returns> |
| | | 51 | | /// <exception cref="ArgumentException">Thrown when the length is invalid</exception> |
| | | 52 | | internal static PayeePubKeyTaggedField FromBitReader(BitReader bitReader, short length) |
| | | 53 | | { |
| | 32 | 54 | | if (length != TaggedFieldConstants.PayeePubkeyLength) |
| | 4 | 55 | | throw new ArgumentException( |
| | 4 | 56 | | $"Invalid length for {nameof(PayeePubKeyTaggedField)}. Expected {TaggedFieldConstants.PayeePubkeyLength} |
| | | 57 | | |
| | | 58 | | // Read the data from the BitReader |
| | | 59 | | // For 53 groups of 5 bits = 265 bits, we need 34 bytes to read, with one padding byte |
| | 28 | 60 | | var data = new byte[(length * 5 + 7) / 8]; |
| | 28 | 61 | | bitReader.ReadBits(data, length * 5); |
| | | 62 | | |
| | | 63 | | // Remove the padding byte |
| | 28 | 64 | | data = data[..^1]; |
| | | 65 | | |
| | 28 | 66 | | return new PayeePubKeyTaggedField(new PubKey(data)); |
| | | 67 | | } |
| | | 68 | | } |