[Framework] add interfaces (neo-project#952)

src/Neo.Compiler.CSharp/CompilationEngine.cs

@@ -116,11 +116,17 @@ private List<CompilationContext> CompileProjectContracts(Compilation compilation
             return Contexts.Select(p => p.Value).ToList();
         }
 
+        /// <summary>
+        /// Sort the classes based on their topological dependencies
+        /// </summary>
+        /// <param name="dependencies">Contract dependencies map</param>
+        /// <returns>List of sorted contracts</returns>
+        /// <exception cref="InvalidOperationException"></exception>
         private static List<INamedTypeSymbol> TopologicalSort(Dictionary<INamedTypeSymbol, List<INamedTypeSymbol>> dependencies)
         {
             var sorted = new List<INamedTypeSymbol>();
             var visited = new HashSet<INamedTypeSymbol>(SymbolEqualityComparer.Default);
-            var visiting = new HashSet<INamedTypeSymbol>(SymbolEqualityComparer.Default); // 添加中间状态以检测循环依赖
+            var visiting = new HashSet<INamedTypeSymbol>(SymbolEqualityComparer.Default); // for detecting cycles
 
             void Visit(INamedTypeSymbol classSymbol)
             {

src/Neo.SmartContract.Framework/Interfaces/INEP11Payment.cs

@@ -0,0 +1,18 @@
+using System.Numerics;
+
+namespace Neo.SmartContract.Framework.Interfaces;
+
+/// <summary>
+/// Interface of method that indicate a contract receive NEP-11 Payment
+/// </summary>
+public interface INep11Payment
+{
+    /// <summary>
+    /// NonFungibleToken contracts should implement the <see cref="OnNEP11Payment"/> method
+    /// to receive assets and modify the Manifest file to trust the received asset contract.
+    /// </summary>
+    /// <param name="from">The address of the payer</param>
+    /// <param name="amount">The amount of token to be transferred</param>
+    /// <param name="data">Additional payment description data</param>
+    public void OnNEP11Payment(UInt160 from, BigInteger amount, object? data = null);
+}

src/Neo.SmartContract.Framework/Interfaces/INEP17Payment.cs

@@ -0,0 +1,18 @@
+using System.Numerics;
+
+namespace Neo.SmartContract.Framework.Interfaces;
+
+/// <summary>
+/// Interface of method that indicate a contract receive NEP-17 Payment
+/// </summary>
+public interface INep17Payment
+{
+    /// <summary>
+    /// The Token contract should implement the <see cref="OnNEP17Payment"/> method
+    /// to receive assets and modify the Manifest file to trust the received asset contract.
+    /// </summary>
+    /// <param name="from">The address of the payer</param>
+    /// <param name="amount">The amount of token to be transferred</param>
+    /// <param name="data">Additional payment description data</param>
+    public void OnNEP17Payment(UInt160 from, BigInteger amount, object? data = null);
+}

tests/Neo.SmartContract.Framework.TestContracts/Contract_SupportedStandard11Enum.cs

@@ -1,15 +1,21 @@
+using System.Numerics;
 using Neo.SmartContract.Framework.Attributes;
+using Neo.SmartContract.Framework.Interfaces;
 
 namespace Neo.SmartContract.Framework.UnitTests.TestClasses
 {
     [SupportedStandards(NEPStandard.NEP11)]
-    public class Contract_SupportedStandard11Enum : Nep11Token<Nep11TokenState>
+    public class Contract_SupportedStandard11Enum : Nep11Token<Nep11TokenState>, INep11Payment
     {
         public static bool TestStandard()
         {
             return true;
         }
 
         public override string Symbol { [Safe] get; }
+
+        public void OnNEP11Payment(UInt160 from, BigInteger amount, object? data = null)
+        {
+        }
     }
 }

tests/Neo.SmartContract.Framework.TestContracts/Contract_SupportedStandard17Enum.cs

@@ -1,5 +1,7 @@
 using Neo.SmartContract.Framework.Attributes;
 using System.ComponentModel;
+using System.Numerics;
+using Neo.SmartContract.Framework.Interfaces;
 
 namespace Neo.SmartContract.Framework.UnitTests.TestClasses
 {
@@ -11,9 +13,13 @@ namespace Neo.SmartContract.Framework.UnitTests.TestClasses
     [ContractSourceCode("https://github.com/neo-project/neo-devpack-dotnet/tree/master/src/Neo.SmartContract.Template")]
     [ContractPermission("*", "*")]
     [SupportedStandards(NEPStandard.NEP17)]
-    public class Contract_SupportedStandard17Enum : Nep17Token
+    public class Contract_SupportedStandard17Enum : Nep17Token, INep17Payment
     {
         public override string Symbol { [Safe] get; }
         public override byte Decimals { [Safe] get; }
+
+        public void OnNEP17Payment(UInt160 from, BigInteger amount, object? data = null)
+        {
+        }
     }
 }