TestWebService.svc

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.Serialization;
using System.Security.Principal;
using System.ServiceModel;
using System.Text;
using System.Threading.Tasks;
using Nethereum.Hex.HexTypes;
using Nethereum.Web3;
using Nethereum.Web3.Accounts;

namespace TestWebService
{
    // NOTE: You can use the "Rename" command on the "Refactor" menu to change the class name "TestService" in code, svc and config file together.
    // NOTE: In order to launch WCF Test Client for testing this service, please select TestService.svc or TestService.svc.cs at the Solution Explorer and start debugging.
    public class TestService : ITestService
    {
        public void DoWork()
        {
            var hash = new HashStoreService().StoreHash().Result;
        }
    }


    public class HashStoreService
    {
        public async Task<string> StoreHash()
        {
            var web3 = new Web3(new Account("0xb3d7d06a45d2ae2b39f7296af2b03b02ad034b47e3660554ddb440f0610c37b7"),
                "https://ropsten.infura.io/pL7x9kxoWf5F4mzkeZ3q");
            var abi =
                "[{'constant':false,'inputs':[{'name':'inHashString','type':'string'},{'name':'inDescription','type':'string'},{'name':'inSubmitDate','type':'string'}],'name':'storeHash','outputs':[],'payable':false,'stateMutability':'nonpayable','type':'function'},{'constant':true,'inputs':[],'name':'getStoredDescription','outputs':[{'name':'','type':'string'}],'payable':false,'stateMutability':'view','type':'function'},{'constant':true,'inputs':[],'name':'getSubmittedDate','outputs':[{'name':'','type':'string'}],'payable':false,'stateMutability':'view','type':'function'},{'constant':true,'inputs':[],'name':'getTransactionDate','outputs':[{'name':'','type':'string'}],'payable':false,'stateMutability':'view','type':'function'},{'constant':true,'inputs':[],'name':'getStoredHash','outputs':[{'name':'','type':'string'}],'payable':false,'stateMutability':'view','type':'function'}]";
            var contract = web3.Eth.GetContract(abi, "0xae4b966957a88afb9fba84359014936520c68e7d");
            var function = contract.GetFunction("storeHash");

            var transactionHash = await function.SendTransactionAsync("0xf558e0532b817903b980bfd1164101aecb5c5368"
                , new HexBigInteger(900000)
                , new HexBigInteger(0)
                , "Test"
                , "Something"
                , "1/1/2018");
            return transactionHash;
        }
    }
}