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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,95 @@ | ||
| #nullable enable | ||
| #if HAS_SPAN | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Diagnostics.CodeAnalysis; | ||
| using System.Linq; | ||
| using System.Text; | ||
| using System.Threading.Tasks; | ||
| using NBitcoin.Crypto; | ||
|
|
||
| namespace NBitcoin | ||
| { | ||
| public enum TapLeafVersion : byte | ||
| { | ||
| C0 = 0xC0, | ||
| } | ||
| public class TapScript | ||
| { | ||
| public Script Script { get; } | ||
| public TapLeafVersion Version { get; } | ||
| uint256? _LeafHash; | ||
| public uint256 LeafHash => _LeafHash ??= ComputeLeafHash(Script, Version); | ||
|
|
||
| internal static uint256 ComputeLeafHash(Script script, TapLeafVersion version) | ||
| { | ||
| var hash = new HashStream { SingleSHA256 = true }; | ||
| hash.InitializeTagged("TapLeaf"); | ||
| hash.WriteByte((byte)version); | ||
| var bs = new BitcoinStream(hash, true); | ||
| bs.ReadWrite(script); | ||
| return hash.GetHash(); | ||
| } | ||
| public TapScript(Script script, TapLeafVersion version) | ||
| { | ||
| //Lazy<int> | ||
| if (script is null) | ||
| throw new ArgumentNullException(nameof(script)); | ||
| this.Script = script; | ||
| this.Version = version; | ||
| } | ||
|
|
||
| public TapScript(TapScript script) | ||
| { | ||
| if (script is null) | ||
| throw new ArgumentNullException(nameof(script)); | ||
| Script = script.Script; | ||
| Version = script.Version; | ||
| _LeafHash = script._LeafHash; | ||
| } | ||
|
|
||
| [return: NotNullIfNotNull("script")] | ||
| public static implicit operator Script?(TapScript? script) | ||
| { | ||
| if (script is null) | ||
| return null; | ||
| return script.Script; | ||
| } | ||
| public override string ToString() | ||
| { | ||
| return $"{(byte)Version:X2}: {Script}"; | ||
| } | ||
|
|
||
|
|
||
| public override bool Equals(object? obj) | ||
| { | ||
| TapScript? item = obj as TapScript; | ||
| if (item is null) | ||
| return false; | ||
| if (this._LeafHash is not null && item._LeafHash is not null) | ||
| return _LeafHash.Equals(item._LeafHash); | ||
| return Script == item.Script && Version == item.Version; | ||
| } | ||
| public static bool operator ==(TapScript a, TapScript b) | ||
| { | ||
| if (System.Object.ReferenceEquals(a, b)) | ||
| return true; | ||
| if (a is null || b is null) | ||
| return false; | ||
| if (a._LeafHash is not null && b._LeafHash is not null) | ||
| return a._LeafHash == b._LeafHash; | ||
| return a.Script == b.Script && a.Version == b.Version; | ||
| } | ||
|
|
||
| public static bool operator !=(TapScript a, TapScript b) | ||
| { | ||
| return !(a == b); | ||
| } | ||
|
|
||
| public override int GetHashCode() | ||
| { | ||
| return HashCode.Combine(Script, Version); | ||
| } | ||
| } | ||
| } | ||
| #endif |
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