[WIP] Feature/implement caller is origin wasm

src/AElf.Runtime.WebAssembly/WebAssemblyRuntime/ExternalEnvironment.cs

@@ -70,7 +70,7 @@ public Hash OwnCodeHash()
 
     public bool CallerIsOrigin()
     {
-        throw new NotImplementedException();
+        return Caller.CompareTo(ContractAddress) == 1;
     }
 
     public bool CallerIsRoot()

test/AElf.Contracts.SolidityContract.Tests/CallerIsOriginTest.cs

@@ -0,0 +1,28 @@
+using System.IO;
+using System.Linq;
+using System.Threading.Tasks;
+using AElf.Types;
+using Google.Protobuf;
+using Nethereum.ABI;
+using Nethereum.ABI.Decoders;
+using Shouldly;
+
+namespace AElf.Contracts.SolidityContract;
+
+public class CallerIsOriginTest: SolidityContractTestBase
+{
+    //TODO This is a WIP and needs further study
+    // [Fact] public async Task<Address> CallerIsOrigin()
+    // {
+    //     const string solFilePath = "contracts/caller_is_origin.sol";
+    //     var executionResult = await DeployWebAssemblyContractAsync(await File.ReadAllBytesAsync(solFilePath));
+    //     var contractAddress = executionResult.Output;
+    //     var tx = await GetTransactionAsync(DefaultSenderKeyPair, contractAddress, "caller_is_origin");
+    //     var txResult = await TestTransactionExecutor.ExecuteAsync(tx);
+    //     txResult.Status.ShouldBe(TransactionResultStatus.Mined);
+    //     var decoder = new IntTypeDecoder();
+    //     var result = decoder.DecodeLong(txResult.ReturnValue.Reverse().ToArray());
+    //     result.ShouldBe(1);
+    //     return contractAddress;
+    // }
+}

test/AElf.Contracts.SolidityContract.Tests/contracts/caller_is_origin.sol

@@ -0,0 +1,7 @@
+pragma solidity ^0.8.0;
+
+contract CallerIsOrigin {
+    function callerIsOrigin() public view returns (int) {
+        return caller_is_origin(msg.sender);
+    }
+}