feat(spv): header sync, Merkle proofs, scripthash

src/Core/Spv/Scripthash.cs

@@ -0,0 +1,21 @@
+using System.Security.Cryptography;
+using NBitcoin;
+
+namespace PalladiumWallet.Core.Spv;
+
+/// <summary>
+/// Scripthash del protocollo di indicizzazione (blueprint §0/§10): SHA-256
+/// dello scriptPubKey con i byte in ordine inverso, esadecimale.
+/// </summary>
+public static class Scripthash
+{
+    public static string FromScript(Script scriptPubKey)
+    {
+        var hash = SHA256.HashData(scriptPubKey.ToBytes());
+        Array.Reverse(hash);
+        return Convert.ToHexString(hash).ToLowerInvariant();
+    }
+
+    public static string FromAddress(BitcoinAddress address) =>
+        FromScript(address.ScriptPubKey);
+}