Merge wallet

Sources/Stratis.Bitcoin.Features.Wallet/Controllers/DeStreamWalletController.cs

@@ -9,6 +9,7 @@ using Stratis.Bitcoin.Features.Wallet.Interfaces;
 using Stratis.Bitcoin.Features.Wallet.Models;
 using Stratis.Bitcoin.Utilities;
 using Stratis.Bitcoin.Utilities.JsonErrors;
+using Stratis.Bitcoin.Utilities.ModelStateErrors;
 
 namespace Stratis.Bitcoin.Features.Wallet.Controllers
 {
@@ -19,15 +20,16 @@ namespace Stratis.Bitcoin.Features.Wallet.Controllers
     public class DeStreamWalletController : Controller
     {
         private readonly ILogger _logger;
-        private readonly Network _network;
+        private readonly DeStreamNetwork _network;
         private readonly IWalletTransactionHandler _walletTransactionHandler;
 
         public DeStreamWalletController(Network network, IWalletTransactionHandler walletTransactionHandler,
             ILoggerFactory loggerFactory)
         {
-            this._network = network;
+            this._network = (DeStreamNetwork) network ??
+                            throw new NotSupportedException($"Network must be {nameof(NBitcoin.DeStreamNetwork)}");
             this._walletTransactionHandler = walletTransactionHandler;
-            this._logger = loggerFactory.CreateLogger(this.GetType().FullName);
+            this._logger = loggerFactory.CreateLogger(GetType().FullName);
         }
 
         /// <summary>
@@ -42,24 +44,36 @@ namespace Stratis.Bitcoin.Features.Wallet.Controllers
             Guard.NotNull(request, nameof(request));
 
             // checks the request is valid
-            if (!this.ModelState.IsValid) return WalletController.BuildErrorResponse(this.ModelState);
+            if (!this.ModelState.IsValid) return ModelStateErrors.BuildErrorResponse(this.ModelState);
 
             try
             {
-                Script destination = BitcoinAddress.Create(request.DestinationAddress, this._network).ScriptPubKey;
-                var context = new TransactionBuildContext(
-                    new WalletAccountReference(request.WalletName, request.AccountName),
-                    new[] {new Recipient {Amount = request.Amount, ScriptPubKey = destination}}.ToList(),
-                    request.Password, request.OpReturnData)
+                var recipients = new List<Recipient>();
+                foreach (RecipientModel recipientModel in request.Recipients)
+                    recipients.Add(new Recipient
+                    {
+                        ScriptPubKey = BitcoinAddress.Create(recipientModel.DestinationAddress, this._network)
+                            .ScriptPubKey,
+                        Amount = recipientModel.Amount
+                    });
+
+                var context = new TransactionBuildContext(this._network)
                 {
+                    AccountReference = new WalletAccountReference(request.WalletName, request.AccountName),
                     TransactionFee = string.IsNullOrEmpty(request.FeeAmount) ? null : Money.Parse(request.FeeAmount),
                     MinConfirmations = request.AllowUnconfirmed ? 0 : 1,
                     Shuffle =
                         request.ShuffleOutputs ??
-                        true // We shuffle transaction outputs by default as it's better for anonymity.
+                        true, // We shuffle transaction outputs by default as it's better for anonymity.
+                    OpReturnData = request.OpReturnData,
+                    WalletPassword = request.Password,
+                    SelectedInputs =
+                        request.Outpoints?.Select(u => new OutPoint(uint256.Parse(u.TransactionId), u.Index)).ToList(),
+                    AllowOtherInputs = false,
+                    Recipients = recipients
                 };
 
-                this.ProcessFeeType(request.FeeType, context.Recipients);
+                ProcessFeeType(request.FeeType, context.Recipients);
 
                 Transaction transactionResult = this._walletTransactionHandler.BuildTransaction(context);
 
@@ -70,7 +84,7 @@ namespace Stratis.Bitcoin.Features.Wallet.Controllers
                     TransactionId = transactionResult.GetHash()
                 };
 
-                return this.Json(model);
+                return Json(model);
             }
             catch (Exception e)
             {
@@ -93,21 +107,30 @@ namespace Stratis.Bitcoin.Features.Wallet.Controllers
             Guard.NotNull(request, nameof(request));
 
             // checks the request is valid
-            if (!this.ModelState.IsValid) return WalletController.BuildErrorResponse(this.ModelState);
+            if (!this.ModelState.IsValid) return ModelStateErrors.BuildErrorResponse(this.ModelState);
 
             try
             {
-                Script destination = BitcoinAddress.Create(request.DestinationAddress, this._network).ScriptPubKey;
-                var context = new TransactionBuildContext(
-                    new WalletAccountReference(request.WalletName, request.AccountName),
-                    new[] {new Recipient {Amount = request.Amount, ScriptPubKey = destination}}.ToList())
+                var recipients = new List<Recipient>();
+                foreach (RecipientModel recipientModel in request.Recipients)
+                    recipients.Add(new Recipient
+                    {
+                        ScriptPubKey = BitcoinAddress.Create(recipientModel.DestinationAddress, this._network)
+                            .ScriptPubKey,
+                        Amount = recipientModel.Amount
+                    });
+
+                var context = new TransactionBuildContext(this._network)
                 {
-                    MinConfirmations = request.AllowUnconfirmed ? 0 : 1
+                    AccountReference = new WalletAccountReference(request.WalletName, request.AccountName),
+                    FeeType = FeeParser.Parse(request.FeeType),
+                    MinConfirmations = request.AllowUnconfirmed ? 0 : 1,
+                    Recipients = recipients
                 };
 
-                this.ProcessFeeType(request.FeeType, context.Recipients);
+                ProcessFeeType(request.FeeType, context.Recipients);
 
-                return this.Json(this._walletTransactionHandler.EstimateFee(context));
+                return Json(this._walletTransactionHandler.EstimateFee(context));
             }
             catch (Exception e)
             {
@@ -134,7 +157,9 @@ namespace Stratis.Bitcoin.Features.Wallet.Controllers
                     recipient.Amount = this._network.SubtractFee(recipient.Amount);
             }
             else
+            {
                 throw new FormatException($"FeeType {requestFeeType} is not a valid DeStreamFeeType");
+            }
         }
     }
 }
\ No newline at end of file

Sources/Stratis.Bitcoin.Features.Wallet/Controllers/WalletController.cs

@@ -34,7 +34,7 @@ namespace Stratis.Bitcoin.Features.Wallet.Controllers
 
         private readonly CoinType coinType;
 
-        /// <summary>Specification of the network the node runs on - regtest/testnet/mainnet.</summary>
+        /// <summary>Specification of the network the node runs on - regtest/testnet/mainnet.</summary>summary
         private readonly Network network;
 
         private readonly IConnectionManager connectionManager;

Sources/Stratis.Bitcoin.Features.Wallet/DeStreamWalletManager.cs

@@ -5,6 +5,7 @@ using Microsoft.Extensions.Logging;
 using NBitcoin;
 using Stratis.Bitcoin.Configuration;
 using Stratis.Bitcoin.Features.Wallet.Interfaces;
+using Stratis.Bitcoin.Interfaces;
 using Stratis.Bitcoin.Utilities;
 
 namespace Stratis.Bitcoin.Features.Wallet
@@ -13,12 +14,11 @@ namespace Stratis.Bitcoin.Features.Wallet
     public class DeStreamWalletManager : WalletManager, IDeStreamWalletManager
     {
         public DeStreamWalletManager(ILoggerFactory loggerFactory, Network network, ConcurrentChain chain,
-            NodeSettings settings, WalletSettings walletSettings,
-            DataFolder dataFolder, IWalletFeePolicy walletFeePolicy, IAsyncLoopFactory asyncLoopFactory,
-            INodeLifetime nodeLifetime, IDateTimeProvider dateTimeProvider,
-            IBroadcasterManager broadcasterManager = null) :
-            base(loggerFactory, network, chain, settings, walletSettings, dataFolder, walletFeePolicy, asyncLoopFactory,
-                nodeLifetime, dateTimeProvider, broadcasterManager)
+            WalletSettings walletSettings, DataFolder dataFolder, IWalletFeePolicy walletFeePolicy,
+            IAsyncLoopFactory asyncLoopFactory, INodeLifetime nodeLifetime, IDateTimeProvider dateTimeProvider,
+            IScriptAddressReader scriptAddressReader, IBroadcasterManager broadcasterManager = null) : base(
+            loggerFactory, network, chain, walletSettings, dataFolder, walletFeePolicy, asyncLoopFactory, nodeLifetime,
+            dateTimeProvider, scriptAddressReader, broadcasterManager)
         {
         }
 
@@ -27,7 +27,7 @@ namespace Stratis.Bitcoin.Features.Wallet
         {
             Wallet result = base.LoadWallet(password, name);
 
-            this.LoadKeysLookupLock();
+            LoadKeysLookupLock();
 
             return result;
         }
@@ -37,11 +37,9 @@ namespace Stratis.Bitcoin.Features.Wallet
         {
             foreach (var transactionWithOutput in this.network.GetGenesis().Transactions.SelectMany(p =>
                 p.Outputs.Select(q => new {Transaction = p, Output = q}).Where(q =>
-                    this.keysLookup.TryGetValue(q.Output.ScriptPubKey, out HdAddress _))))
-            {
-                this.AddTransactionToWallet(transactionWithOutput.Transaction, transactionWithOutput.Output, 0,
+                    this.scriptToAddressLookup.TryGetValue(q.Output.ScriptPubKey, out HdAddress _))))
+                AddTransactionToWallet(transactionWithOutput.Transaction, transactionWithOutput.Output, 0,
                     this.network.GetGenesis());
-            }
         }
 
         protected override void AddSpendingTransactionToWallet(Transaction transaction,
@@ -51,12 +49,9 @@ namespace Stratis.Bitcoin.Features.Wallet
             Guard.NotNull(transaction, nameof(transaction));
             Guard.NotNull(paidToOutputs, nameof(paidToOutputs));
 
-            this.logger.LogTrace("({0}:'{1}',{2}:'{3}',{4}:{5},{6}:'{7}')", nameof(transaction), transaction.GetHash(),
-                nameof(spendingTransactionId), spendingTransactionId, nameof(spendingTransactionIndex),
-                spendingTransactionIndex, nameof(blockHeight), blockHeight);
-
             // Get the transaction being spent.
-            TransactionData spentTransaction = this.keysLookup.Values.Distinct().SelectMany(v => v.Transactions)
+            TransactionData spentTransaction = this.scriptToAddressLookup.Values.Distinct()
+                .SelectMany(v => v.Transactions)
                 .SingleOrDefault(t => t.Id == spendingTransactionId && t.Index == spendingTransactionIndex);
             if (spentTransaction == null)
             {
@@ -64,35 +59,20 @@ namespace Stratis.Bitcoin.Features.Wallet
                 this.logger.LogTrace("(-)[TX_NULL]");
                 return;
             }
-                this.logger.LogTrace(spentTransaction.SpendingDetails == null
-                    ? $"Spending UTXO '{spendingTransactionId}-{spendingTransactionIndex}' is new."
-                    : $"Spending transaction ID '{spendingTransactionId}' is being confirmed, updating.");
+
+            this.logger.LogTrace(spentTransaction.SpendingDetails == null
+                ? $"Spending UTXO '{spendingTransactionId}-{spendingTransactionIndex}' is new."
+                : $"Spending transaction ID '{spendingTransactionId}' is being confirmed, updating.");
 
             var payments = new List<PaymentDetails>();
             foreach (TxOut paidToOutput in paidToOutputs)
             {
                 // Figure out how to retrieve the destination address.
-                string destinationAddress = string.Empty;
-                ScriptTemplate scriptTemplate = paidToOutput.ScriptPubKey.FindTemplate(this.network);
-                switch (scriptTemplate.Type)
-                {
-                    // Pay to PubKey can be found in outputs of staking transactions.
-                    case TxOutType.TX_PUBKEY:
-                        PubKey pubKey =
-                            PayToPubkeyTemplate.Instance.ExtractScriptPubKeyParameters(paidToOutput.ScriptPubKey);
-                        destinationAddress = pubKey.GetAddress(this.network).ToString();
-                        break;
-                    // Pay to PubKey hash is the regular, most common type of output.
-                    case TxOutType.TX_PUBKEYHASH:
-                        destinationAddress = paidToOutput.ScriptPubKey.GetDestinationAddress(this.network).ToString();
-                        break;
-                    case TxOutType.TX_NONSTANDARD:
-                    case TxOutType.TX_SCRIPTHASH:
-                    case TxOutType.TX_MULTISIG:
-                    case TxOutType.TX_NULL_DATA:
-                    case TxOutType.TX_SEGWIT:
-                        break;
-                }
+                string destinationAddress =
+                    this.scriptAddressReader.GetAddressFromScriptPubKey(this.network, paidToOutput.ScriptPubKey);
+                if (destinationAddress == string.Empty)
+                    if (this.scriptToAddressLookup.TryGetValue(paidToOutput.ScriptPubKey, out HdAddress destination))
+                        destinationAddress = destination.Address;
 
                 payments.Add(new PaymentDetails
                 {
@@ -114,8 +94,6 @@ namespace Stratis.Bitcoin.Features.Wallet
 
             spentTransaction.SpendingDetails = spendingDetails;
             spentTransaction.MerkleProof = null;
-
-            this.logger.LogTrace("(-)");
         }
     }
 }
\ No newline at end of file

Sources/Stratis.Bitcoin.Features.Wallet/DeStreamWalletSyncManager.cs

@@ -2,6 +2,7 @@
 using NBitcoin;
 using Stratis.Bitcoin.Features.BlockStore;
 using Stratis.Bitcoin.Features.Wallet.Interfaces;
+using Stratis.Bitcoin.Interfaces;
 using Stratis.Bitcoin.Utilities;
 
 namespace Stratis.Bitcoin.Features.Wallet
@@ -11,9 +12,9 @@ namespace Stratis.Bitcoin.Features.Wallet
         private readonly IDeStreamWalletManager _deStreamWalletManager;
 
         public DeStreamWalletSyncManager(ILoggerFactory loggerFactory, IDeStreamWalletManager walletManager,
-            ConcurrentChain chain, Network network, IBlockStoreCache blockStoreCache, StoreSettings storeSettings,
-            INodeLifetime nodeLifetime) : base(loggerFactory, walletManager, chain, network, blockStoreCache,
-            storeSettings, nodeLifetime)
+            ConcurrentChain chain, Network network, IBlockStore blockStore, StoreSettings storeSettings,
+            INodeLifetime nodeLifetime) : base(loggerFactory, walletManager, chain, network, blockStore, storeSettings,
+            nodeLifetime)
         {
             this._deStreamWalletManager = walletManager;
         }

Sources/Stratis.Bitcoin.Features.Wallet/DeStreamWalletTransactionHandler.cs

@@ -5,7 +5,7 @@ using System.Security;
 using Microsoft.Extensions.Caching.Memory;
 using Microsoft.Extensions.Logging;
 using NBitcoin;
-using Stratis.Bitcoin.Features.Consensus;
+using NBitcoin.Policy;
 using Stratis.Bitcoin.Features.Wallet.Interfaces;
 using Stratis.Bitcoin.Utilities;
 using Stratis.Bitcoin.Utilities.Extensions;
@@ -15,15 +15,25 @@ namespace Stratis.Bitcoin.Features.Wallet
     public class DeStreamWalletTransactionHandler : WalletTransactionHandler
     {
         public DeStreamWalletTransactionHandler(ILoggerFactory loggerFactory, IWalletManager walletManager,
-            IWalletFeePolicy walletFeePolicy, Network network) : base(loggerFactory, walletManager, walletFeePolicy,
-            network)
+            IWalletFeePolicy walletFeePolicy, Network network, StandardTransactionPolicy transactionPolicy) : base(
+            loggerFactory, walletManager, walletFeePolicy, network, transactionPolicy)
         {
         }
 
+        private DeStreamNetwork DeStreamNetwork
+        {
+            get
+            {
+                if (!(this.network is DeStreamNetwork))
+                    throw new NotSupportedException($"Network must be {nameof(NBitcoin.DeStreamNetwork)}");
+                return (DeStreamNetwork) this.network;
+            }
+        }
+
         /// <inheritdoc />
         protected override void AddFee(TransactionBuildContext context)
         {
-            long fee = Convert.ToInt64(context.Recipients.Sum(p => p.Amount) * this.Network.FeeRate);
+            long fee = Convert.ToInt64(context.Recipients.Sum(p => p.Amount) * this.DeStreamNetwork.FeeRate);
             context.TransactionFee = fee;
             context.TransactionBuilder.SendFees(fee);
         }
@@ -56,16 +66,16 @@ namespace Stratis.Bitcoin.Features.Wallet
                 // Here we try to create a transaction that contains all the spendable coins, leaving no room for the fee.
                 // When the transaction builder throws an exception informing us that we have insufficient funds,
                 // we use the amount we're missing as the fee.
-                var context = new TransactionBuildContext(accountReference, recipients, null)
-                {
-                    FeeType = feeType,
-                    MinConfirmations = allowUnconfirmed ? 0 : 1,
-                    TransactionBuilder = new DeStreamTransactionBuilder(this.Network)
-                };
+                var context =
+                    new DeStreamTransactionBuilderContext(new DeStreamTransactionBuilder(this.DeStreamNetwork))
+                    {
+                        FeeType = feeType,
+                        MinConfirmations = allowUnconfirmed ? 0 : 1
+                    };
 
-                this.AddRecipients(context);
-                this.AddCoins(context);
-                this.AddFee(context);
+                AddRecipients(context);
+                AddCoins(context);
+                AddFee(context);
 
                 // Throw an exception if this code is reached, as building a transaction without any funds for the fee should always throw an exception.
                 throw new WalletException(
@@ -97,6 +107,9 @@ namespace Stratis.Bitcoin.Features.Wallet
             }
             else
             {
+                if (string.IsNullOrEmpty(context.WalletPassword))
+                    return;
+
                 privateKey = Key.Parse(wallet.EncryptedSeed, context.WalletPassword, wallet.Network);
                 this.privateKeyCache.Set(cacheKey, privateKey.ToString(wallet.Network).ToSecureString(),
                     new TimeSpan(0, 5, 0));
@@ -143,8 +156,8 @@ namespace Stratis.Bitcoin.Features.Wallet
             // Add all coinstake transactions with enough confirmations
             context.UnspentOutputs.AddRange(this.walletManager
                 .GetSpendableTransactionsInAccount(context.AccountReference,
-                    this.Network.Consensus.Option<PosConsensusOptions>()
-                        .GetStakeMinConfirmations(this.walletManager.LastBlockHeight(), this.Network))
+                    ((PosConsensusOptions) this.DeStreamNetwork.Consensus.Options)
+                    .GetStakeMinConfirmations(this.walletManager.LastBlockHeight(), this.DeStreamNetwork))
                 .Where(p => p.Transaction.IsCoinStake ?? false)
                 .ToList());
 
@@ -154,6 +167,9 @@ namespace Stratis.Bitcoin.Features.Wallet
                     .FirstOrDefault(p => p.Transaction.IsCoinStake ?? false)
                     ?.Address.Pubkey;
 
+            context.UnspentOutputs = this.walletManager
+                .GetSpendableTransactionsInAccount(context.AccountReference, context.MinConfirmations).ToList();
+
             if (context.UnspentOutputs.Count == 0) throw new WalletException("No spendable transactions found.");
 
             // Get total spendable balance in the account.
@@ -162,7 +178,7 @@ namespace Stratis.Bitcoin.Features.Wallet
             if (balance < totalToSend)
                 throw new WalletException("Not enough funds.");
 
-            if (context.SelectedInputs.Any())
+            if (context.SelectedInputs != null && context.SelectedInputs.Any())
             {
                 // 'SelectedInputs' are inputs that must be included in the
                 // current transaction. At this point we check the given
@@ -176,13 +192,9 @@ namespace Stratis.Bitcoin.Features.Wallet
                     throw new WalletException("Not all the selected inputs were found on the wallet.");
 
                 if (!context.AllowOtherInputs)
-                {
                     foreach (KeyValuePair<OutPoint, UnspentOutputReference> unspentOutputsItem in availableHashList)
-                    {
                         if (!context.SelectedInputs.Contains(unspentOutputsItem.Key))
                             context.UnspentOutputs.Remove(unspentOutputsItem.Value);
-                    }
-                }
             }
 
             Money sum = 0;
@@ -197,7 +209,7 @@ namespace Stratis.Bitcoin.Features.Wallet
 
                 // If threshold is reached and the total value is above the target
                 // then its safe to stop adding UTXOs to the coin list.
-                // The primery goal is to reduce the time it takes to build a trx
+                // The primary goal is to reduce the time it takes to build a trx
                 // when the wallet is bloated with UTXOs.
                 if (index > SendCountThresholdLimit && sum > totalToSend)
                     break;
@@ -211,22 +223,16 @@ namespace Stratis.Bitcoin.Features.Wallet
 
             context.TransactionBuilder.AddCoins(coins);
         }
+    }
 
-        /// <inheritdoc />
-        protected override void InitializeTransactionBuilder(TransactionBuildContext context)
+    public class DeStreamTransactionBuilderContext : TransactionBuildContext
+    {
+        private DeStreamTransactionBuilderContext(Network network) : base(network)
+        {
+        }
+
+        public DeStreamTransactionBuilderContext(TransactionBuilder transactionBuilder) : base(transactionBuilder)
         {
-            Guard.NotNull(context, nameof(context));
-            Guard.NotNull(context.Recipients, nameof(context.Recipients));
-            Guard.NotNull(context.AccountReference, nameof(context.AccountReference));
-
-            context.TransactionBuilder = new DeStreamTransactionBuilder(this.Network);
-
-            this.AddRecipients(context);
-            this.AddOpReturnOutput(context);
-            this.AddCoins(context);
-            this.FindChangeAddress(context);
-            this.AddSecrets(context);
-            this.AddFee(context);
         }
     }
 }
\ No newline at end of file

Sources/Stratis.Bitcoin.Features.Wallet/WalletManager.cs

@@ -63,7 +63,7 @@ namespace Stratis.Bitcoin.Features.Wallet
         private readonly INodeLifetime nodeLifetime;
 
         /// <summary>Instance logger.</summary>
-        private readonly ILogger logger;
+        protected readonly ILogger logger;
 
         /// <summary>An object capable of storing <see cref="Wallet"/>s to the file system.</summary>
         private readonly FileStorage<Wallet> fileStorage;
@@ -75,10 +75,10 @@ namespace Stratis.Bitcoin.Features.Wallet
         private readonly IDateTimeProvider dateTimeProvider;
 
         /// <summary>The settings for the wallet feature.</summary>
-        private readonly WalletSettings walletSettings;
+        protected readonly WalletSettings walletSettings;
 
         /// <summary>The settings for the wallet feature.</summary>
-        private readonly IScriptAddressReader scriptAddressReader;
+        protected readonly IScriptAddressReader scriptAddressReader;
 
         public uint256 WalletTipHash { get; set; }
 
@@ -268,7 +268,7 @@ namespace Stratis.Bitcoin.Features.Wallet
         }
 
         /// <inheritdoc />
-        public Wallet LoadWallet(string password, string name)
+        public virtual Wallet LoadWallet(string password, string name)
         {
             Guard.NotEmpty(password, nameof(password));
             Guard.NotEmpty(name, nameof(name));
@@ -938,7 +938,7 @@ namespace Stratis.Bitcoin.Features.Wallet
         /// <param name="blockHeight">Height of the block.</param>
         /// <param name="block">The block containing the transaction to add.</param>
         /// <param name="isPropagated">Propagation state of the transaction.</param>
-        private void AddTransactionToWallet(Transaction transaction, TxOut utxo, int? blockHeight = null, Block block = null, bool isPropagated = true)
+        protected void AddTransactionToWallet(Transaction transaction, TxOut utxo, int? blockHeight = null, Block block = null, bool isPropagated = true)
         {
             Guard.NotNull(transaction, nameof(transaction));
             Guard.NotNull(utxo, nameof(utxo));
@@ -1022,7 +1022,7 @@ namespace Stratis.Bitcoin.Features.Wallet
         /// <param name="spendingTransactionIndex">The index of the output in the transaction being referenced, if this is a spending transaction.</param>
         /// <param name="blockHeight">Height of the block.</param>
         /// <param name="block">The block containing the transaction to add.</param>
-        private void AddSpendingTransactionToWallet(Transaction transaction, IEnumerable<TxOut> paidToOutputs,
+        protected virtual void AddSpendingTransactionToWallet(Transaction transaction, IEnumerable<TxOut> paidToOutputs,
             uint256 spendingTransactionId, int? spendingTransactionIndex, int? blockHeight = null, Block block = null)
         {
             Guard.NotNull(transaction, nameof(transaction));

Sources/Stratis.Bitcoin.Features.Wallet/WalletSyncManager.cs

@@ -19,7 +19,7 @@ namespace Stratis.Bitcoin.Features.Wallet
         private readonly ConcurrentChain chain;
 
         /// <summary>Instance logger.</summary>
-        private readonly ILogger logger;
+        protected readonly ILogger logger;
 
         private readonly IBlockStore blockStore;
 

Sources/Stratis.Bitcoin.Features.Wallet/WalletTransactionHandler.cs

@@ -30,17 +30,17 @@ namespace Stratis.Bitcoin.Features.Wallet
         /// 500 is a safe number that if reached ensures the coin selector will not take too long to complete,
         /// most regular wallets will never reach such a high number of UTXO.
         /// </remarks>
-        private const int SendCountThresholdLimit = 500;
+        protected const int SendCountThresholdLimit = 500;
 
         private readonly ILogger logger;
 
-        private readonly Network network;
+        protected readonly Network network;
 
-        private readonly MemoryCache privateKeyCache;
+        protected readonly MemoryCache privateKeyCache;
 
         protected readonly StandardTransactionPolicy TransactionPolicy;
 
-        private readonly IWalletManager walletManager;
+        protected readonly IWalletManager walletManager;
 
         private readonly IWalletFeePolicy walletFeePolicy;
 
@@ -129,7 +129,7 @@ namespace Stratis.Bitcoin.Features.Wallet
         }
 
         /// <inheritdoc />
-        public (Money maximumSpendableAmount, Money Fee) GetMaximumSpendableAmount(WalletAccountReference accountReference, FeeType feeType, bool allowUnconfirmed)
+        public virtual (Money maximumSpendableAmount, Money Fee) GetMaximumSpendableAmount(WalletAccountReference accountReference, FeeType feeType, bool allowUnconfirmed)
         {
             Guard.NotNull(accountReference, nameof(accountReference));
             Guard.NotEmpty(accountReference.WalletName, nameof(accountReference.WalletName));
@@ -244,7 +244,7 @@ namespace Stratis.Bitcoin.Features.Wallet
         /// Load's all the private keys for each of the <see cref="HdAddress"/> in <see cref="TransactionBuildContext.UnspentOutputs"/>
         /// </summary>
         /// <param name="context">The context associated with the current transaction being built.</param>
-        protected void AddSecrets(TransactionBuildContext context)
+        protected virtual void AddSecrets(TransactionBuildContext context)
         {
             if (!context.Sign)
                 return;
@@ -303,7 +303,7 @@ namespace Stratis.Bitcoin.Features.Wallet
         /// Then add them to the <see cref="TransactionBuildContext.UnspentOutputs"/>.
         /// </summary>
         /// <param name="context">The context associated with the current transaction being built.</param>
-        protected void AddCoins(TransactionBuildContext context)
+        protected virtual void AddCoins(TransactionBuildContext context)
         {
             context.UnspentOutputs = this.walletManager.GetSpendableTransactionsInAccount(context.AccountReference, context.MinConfirmations).ToList();
 
@@ -389,7 +389,7 @@ namespace Stratis.Bitcoin.Features.Wallet
         /// Use the <see cref="FeeRate"/> from the <see cref="walletFeePolicy"/>.
         /// </summary>
         /// <param name="context">The context associated with the current transaction being built.</param>
-        protected void AddFee(TransactionBuildContext context)
+        protected virtual void AddFee(TransactionBuildContext context)
         {
             Money fee;
             Money minTrxFee = new Money(this.network.MinTxFee, MoneyUnit.Satoshi);
@@ -449,6 +449,18 @@ namespace Stratis.Bitcoin.Features.Wallet
             this.Sign = true;
         }
 
+        protected TransactionBuildContext(TransactionBuilder transactionBuilder)
+        {
+            this.TransactionBuilder = transactionBuilder;
+            this.Recipients = new List<Recipient>();
+            this.WalletPassword = string.Empty;
+            this.FeeType = FeeType.Medium;
+            this.MinConfirmations = 1;
+            this.SelectedInputs = new List<OutPoint>();
+            this.AllowOtherInputs = false;
+            this.Sign = true;
+        }
+
         /// <summary>
         /// The wallet account to use for building a transaction.
         /// </summary>