better history objects

Breeze/src/Breeze.Wallet/Controllers/WalletController.cs

@@ -198,8 +198,9 @@ namespace Breeze.Wallet.Controllers
             {
                 WalletHistoryModel model = new WalletHistoryModel { Transactions = new List<TransactionItem>() };
 
-                var accounts = this.walletManager.GetAccountsByCoinType(request.WalletName, request.CoinType).ToList();
-                foreach (var address in accounts.SelectMany(a => a.ExternalAddresses).Concat(accounts.SelectMany(a => a.InternalAddresses)))
+                // get transactions contained in the wallet
+                var addresses = this.walletManager.GetHistoryByCoinType(request.WalletName, request.CoinType);
+                foreach (var address in addresses)
                 {
                     foreach (var transaction in address.Transactions)
                     {

Breeze/src/Breeze.Wallet/IWalletManager.cs

@@ -97,6 +97,22 @@ namespace Breeze.Wallet
         /// <returns>An unused address or a newly created address, in Base58 format.</returns>
         string GetUnusedAddress(string walletName, CoinType coinType, string accountName);
 
+        /// <summary>
+        /// Gets a collection of addresses containing transactions for this coin.
+        /// </summary>
+        /// <param name="walletName">The name of the wallet to get history from.</param>
+        /// <param name="coinType">Type of the coin.</param>
+        /// <returns></returns>
+        IEnumerable<HdAddress> GetHistoryByCoinType(string walletName, CoinType coinType);
+
+        /// <summary>
+        /// Gets a collection of addresses containing transactions for this coin.
+        /// </summary>
+        /// <param name="wallet">The wallet to get history from.</param>
+        /// <param name="coinType">Type of the coin.</param>
+        /// <returns></returns>
+        IEnumerable<HdAddress> GetHistoryByCoinType(Wallet wallet, CoinType coinType);
+
         WalletGeneralInfoModel GetGeneralInfo(string walletName);
 
         /// <summary>

Breeze/src/Breeze.Wallet/Wallet.cs

@@ -57,6 +57,33 @@ namespace Breeze.Wallet
         /// </summary>
         [JsonProperty(PropertyName = "accountsRoot")]
         public IEnumerable<AccountRoot> AccountsRoot { get; set; }
+
+        /// <summary>
+        /// Gets the type of the accounts by coin.
+        /// </summary>
+        /// <param name="coinType">Type of the coin.</param>
+        /// <returns></returns>
+        public IEnumerable<HdAccount> GetAccountsByCoinType(CoinType coinType)
+        {
+            return this.AccountsRoot.Where(a => a.CoinType == coinType).SelectMany(a => a.Accounts);
+        }
+
+        /// <summary>
+        /// Gets all the transactions by coin type.
+        /// </summary>
+        /// <param name="coinType">Type of the coin.</param>
+        /// <returns></returns>
+        public IEnumerable<TransactionData> GetAllTransactionsByCoinType(CoinType coinType)
+        {
+            List<TransactionData> result = new List<TransactionData>();
+            var accounts = this.GetAccountsByCoinType(coinType).ToList();
+            
+            foreach (var address in accounts.SelectMany(a => a.ExternalAddresses).Concat(accounts.SelectMany(a => a.InternalAddresses)))
+            {
+                result.AddRange(address.Transactions);
+            }
+            return result;
+        }
     }
 
     /// <summary>

Breeze/src/Breeze.Wallet/WalletManager.cs

@@ -242,6 +242,32 @@ namespace Breeze.Wallet
             return account.GetFirstUnusedExternalAddress().Address;
         }
 
+        /// <inheritdoc />
+        public IEnumerable<HdAddress> GetHistoryByCoinType(string walletName, CoinType coinType)
+        {
+            Wallet wallet = this.Wallets.SingleOrDefault(w => w.Name == walletName);
+            if (wallet == null)
+            {
+                throw new Exception($"No wallet with name {walletName} could be found.");
+            }
+
+            return this.GetHistoryByCoinType(wallet, coinType);
+        }
+
+        /// <inheritdoc />
+        public IEnumerable<HdAddress> GetHistoryByCoinType(Wallet wallet, CoinType coinType)
+        {
+            var accounts = wallet.GetAccountsByCoinType(coinType).ToList();
+
+            foreach (var address in accounts.SelectMany(a => a.ExternalAddresses).Concat(accounts.SelectMany(a => a.InternalAddresses)))
+            {
+                if (address.Transactions.Any())
+                {
+                    yield return address;
+                }                
+            }            
+        }
+
         /// <summary>
         /// Creates a number of addresses in the provided account.
         /// </summary>
@@ -301,9 +327,13 @@ namespace Breeze.Wallet
         /// <inheritdoc />
         public IEnumerable<HdAccount> GetAccountsByCoinType(string walletName, CoinType coinType)
         {
-            return this.Wallets.
-                SelectMany(w => w.AccountsRoot.Where(a => a.CoinType == coinType)).
-                SelectMany(a => a.Accounts);
+            Wallet wallet = this.Wallets.SingleOrDefault(w => w.Name == walletName);
+            if (wallet == null)
+            {
+                throw new Exception($"No wallet with name {walletName} could be found.");
+            }
+
+            return wallet.GetAccountsByCoinType(coinType);
         }
 
         public WalletBuildTransactionModel BuildTransaction(string password, string address, Money amount, string feeType, bool allowUnconfirmed)