Enable converting between public keys, script hashes and address

src/neo/SmartContract/InteropService.Encode.cs

@@ -0,0 +1,52 @@
+using Neo.Cryptography;
+using Neo.IO;
+using Neo.VM;
+using Neo.Wallets;
+using System;
+using System.Linq;
+
+namespace Neo.SmartContract
+{
+    partial class InteropService
+    {
+        public static class Encode
+        {
+            public static readonly InteropDescriptor PubKey2Address = Register("Neo.Crypto.PubKey2Address", Crypto_PubKey2Address, 0_01000000, TriggerType.All, CallFlags.None);
+            public static readonly InteropDescriptor PubKey2ScriptHash = Register("Neo.Crypto.PubKey2ScriptHash", Crypto_PubKey2ScriptHash, 0_01000000, TriggerType.All, CallFlags.None);
+            public static readonly InteropDescriptor Address2ScriptHash = Register("Neo.Crypto.Address2ScriptHash", Crypto_Address2ScriptHash, 0_01000000, TriggerType.All, CallFlags.None);
+            public static readonly InteropDescriptor ScriptHash2Address = Register("Neo.Crypto.ScriptHash2Address", Crypto_ScriptHash2Address, 0_01000000, TriggerType.All, CallFlags.None);
+
+            private static bool Crypto_PubKey2Address(ApplicationEngine engine)
+            {
+                ReadOnlySpan<byte> pubKey = engine.CurrentContext.EvaluationStack.Pop().GetSpan();
+                byte[] scriptHash = Cryptography.ECC.ECPoint.FromBytes(pubKey.ToArray(), Cryptography.ECC.ECCurve.Secp256r1).EncodePoint(true).ToScriptHash().ToAddress().HexToBytes(); ;
+                engine.CurrentContext.EvaluationStack.Push(scriptHash);
+                return true;
+            }
+
+            private static bool Crypto_PubKey2ScriptHash(ApplicationEngine engine)
+            {
+                ReadOnlySpan<byte> pubKey = engine.CurrentContext.EvaluationStack.Pop().GetSpan();
+                byte[] scriptHash = Cryptography.ECC.ECPoint.FromBytes(pubKey.ToArray(), Cryptography.ECC.ECCurve.Secp256r1).EncodePoint(true).ToScriptHash().ToArray();
+                engine.CurrentContext.EvaluationStack.Push(scriptHash);
+                return true;
+            }
+
+            private static bool Crypto_Address2ScriptHash(ApplicationEngine engine)
+            {
+                ReadOnlySpan<byte> address = engine.CurrentContext.EvaluationStack.Pop().GetSpan();
+                byte[] scriptHash = address.ToHexString().ToScriptHash().ToArray();
+                engine.CurrentContext.EvaluationStack.Push(scriptHash);
+                return true;
+            }
+
+            private static bool Crypto_ScriptHash2Address(ApplicationEngine engine)
+            {
+                ReadOnlySpan<byte> hash = engine.CurrentContext.EvaluationStack.Pop().GetSpan();
+                byte[] address = new UInt160(hash).ToAddress().HexToBytes();
+                engine.CurrentContext.EvaluationStack.Push(address);
+                return true;
+            }
+        }
+    }
+}