BCH Wallet for C# : how to creating public key and address from a Random String (mnemonics) , Getting BHC Balance from address , sending BCH transaction to BCH blockchain.

[Wgroup-Zohaib]

[Wgroup-Zohaib]

Sample code for Steller Wallet ,

using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using Stellar.Implementation.Common;
using Stellar.Implementation.Interface;
using stellar_dotnet_sdk;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;

namespace Stellar.Implementation.Implementation
{
    public class StellarWallet : IStellarWallet
    {
        public string GenerateWalletAddress(string mnemonic)
        {
            var wallet = Wallet.FromMnemonic(mnemonic);
            var WalletAddress = wallet.GetPublicKey(0);
          
            return WalletAddress;
        }

        public decimal GetBalance(string PublicAddress)
        {
            decimal balance = 0.0M;
            //String server = String.Format("https://horizon-testnet.stellar.org/accounts/{0}", PublicAddress);
            String server = String.Format("https://horizon.stellar.org/accounts/{0}", PublicAddress);
            var body = "";
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(server);
            using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
            {
                using (Stream stream = response.GetResponseStream())
                {
                    using (StreamReader reader = new StreamReader(stream))
                    {
                        body = reader.ReadToEnd();
                    }
                }
            }
            var obj = JObject.Parse(body);
            var balancesArray = (JArray)obj.SelectToken("balances");
            foreach (var item in balancesArray)
            {
                if(item.SelectToken("asset_type").ToString() == "native")
                {
                    balance = Convert.ToDecimal(item.SelectToken("balance").ToString());
                }
            }
            //var b = new Balance();
            //var getBalance = JsonConvert.DeserializeObject<JArray>(body);
            //foreach (var item in getBalance["balances"])
            //{
            //    var amount = (double)item["balance"];
            //    var asset_type = (string)item["asset_type"];
            //    if (asset_type == "native")
            //    {
            //        b.balance = amount;
            //        b.asset_type = asset_type;
            //    }
            //}
            //var json = JsonConvert.SerializeObject(b);
            return balance;
        }
        public async Task<string> MakePayment(string amount, string mnemonic, string destAccountId)
        {
            var PrivateKey = Wallet.FromMnemonic(mnemonic).GetPrivateKey(0);

            Network.UseTestNetwork();
            //Server server = new Server("https://horizon-testnet.stellar.org");
            Server server = new Server("https://horizon.stellar.org");
            var sourceKeypair = KeyPair.FromSecretSeed(PrivateKey);
            var destinationKeyPair = KeyPair.FromAccountId(destAccountId);
            var destAccount = server.Accounts.Account(destinationKeyPair);
            //var sourceAccountResp = await server.Accounts.Account(sourceKeypair);

            //String getAccount = String.Format("https://horizon-testnet.stellar.org/accounts/{0}", sourceKeypair.AccountId);
            String getAccount = String.Format("https://horizon.stellar.org/accounts/{0}", sourceKeypair.AccountId);
            var body = "";
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(getAccount);
            using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
            {
                using (Stream stream = response.GetResponseStream())
                {
                    using (StreamReader reader = new StreamReader(stream))
                    {
                        body = reader.ReadToEnd();
                    }
                }
            }
            var obj = JObject.Parse(body);
            var sequenceNo = (long)obj.SelectToken("sequence");
            //Console.WriteLine(sequenceNo);

Zohaib Khalid, [14.09.20 17:25]
var sourceAccount = new Account(sourceKeypair, sequenceNo);
            var operation = new PaymentOperation.Builder(destinationKeyPair, new AssetTypeNative(), amount).Build();
            var transaction = new Transaction.Builder(sourceAccount).AddOperation(operation).AddMemo(Memo.Text("sample payment")).Build();
            transaction.Sign(sourceKeypair);

            try
            {
                var resp = await server.SubmitTransaction(transaction);
                if (resp.IsSuccess())
                {
                    //Console.WriteLine("\ntransaction completed successfully!\n");
                    //Console.WriteLine("Remaining Balance of Sender Account\n");
                    //await GetAccountBalanceTest(sourceKeypair.AccountId);
                    //var tx = JsonConvert.SerializeObject(transaction);
                    return transaction.SequenceNumber.ToString();
                }
                else
                {
                    throw new Exception("Transaction Not Completed");
                }
            }
            catch (Exception e)
            {
                throw e;
            }
        }

        public string GetTestnetCoins(string address)
        {
            String friendBotUrl = String.Format("https://friendbot.stellar.org/?addr={0}", address);
            var body = "";
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(friendBotUrl);
            using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())
            {
                using (Stream stream = response.GetResponseStream())
                {
                    using (StreamReader reader = new StreamReader(stream))
                    {
                        body = reader.ReadToEnd();
                    }
                }
            }
            return body;
        }
    }
}

[Wgroup-Zohaib]

StellarWallet.zip