Add support for blake3 algorithm

src/Miningcore/Crypto/Hashing/Algorithms/Blake3.cs

@@ -0,0 +1,21 @@
+using Miningcore.Contracts;
+using Miningcore.Native;
+
+namespace Miningcore.Crypto.Hashing.Algorithms;
+
+[Identifier("blake3")]
+public unsafe class Blake3 : IHashAlgorithm
+{
+    public void Digest(ReadOnlySpan<byte> data, Span<byte> result, params object[] extra)
+    {
+        Contract.Requires<ArgumentException>(result.Length >= 32);
+
+        fixed (byte* input = data)
+        {
+            fixed (byte* output = result)
+            {
+                Multihash.blake3(input, output, (uint) data.Length);
+            }
+        }
+    }
+}

src/Miningcore/Native/Multihash.cs

@@ -85,6 +85,9 @@ public static unsafe class Multihash
     [DllImport("libmultihash", EntryPoint = "blake2b_export", CallingConvention = CallingConvention.Cdecl)]
     public static extern void blake2b(byte* input, void* output, uint inputLength, int outputLength);
 
+    [DllImport("libmultihash", EntryPoint = "blake3_export", CallingConvention = CallingConvention.Cdecl)]
+    public static extern void blake3(byte* input, void* output, uint inputLength);
+
     [DllImport("libmultihash", EntryPoint = "dcrypt_export", CallingConvention = CallingConvention.Cdecl)]
     public static extern void dcrypt(byte* input, void* output, uint inputLength);
 

src/Native/libmultihash/Makefile

@@ -14,6 +14,8 @@ OBJECTS = allium.o bcrypt.o blake.o c11.o dcrypt.o fresh.o lane.o \
 	sha3/extra.o sha3/gost_streebog.o sha3/sph_tiger.o sha3/SWIFFTX.o KeccakP-800-reference.o \
 	shavite3.o skein.o skein2.o x11.o x11gost.o x13.o x15.o x17.o x16r.o x16rt.o x16rv2.o x16s.o x20r.o x21s.o x22i.o \
 	blake2/sse/blake2s.o blake2/sse/blake2b.o \
+	blake3/blake3.o blake3/blake3_dispatch.o blake3/blake3_portable.o \
+	blake3/blake3_sse41_x86-64_unix.o blake3/blake3_avx2_x86-64_unix.o blake3/blake3_avx512_x86-64_unix.o \
 	Lyra2.o Lyra2RE.o Sponge.o geek.o minotaurx.o memehash.o rwahash.o \
 	heavyhash/heavyhash.o heavyhash/keccak_tiny.o \
 	verthash/tiny_sha3/sha3.o verthash/h2.o \