[bitstamp] fix for "None" fees and internal settlements

xchange-bitstamp/src/main/java/org/knowm/xchange/bitstamp/BitstampAdapters.java

@@ -242,14 +242,25 @@ public static UserTrades adaptTradeHistory(BitstampUserTransaction[] bitstampUse
               .timestamp(t.getDatetime())
               .id(Long.toString(tradeId))
               .orderId(Long.toString(t.getOrderId()))
-              .feeAmount(t.getFee())
+              .feeAmount(getFeeFromString(t.getFee()))
               .feeCurrency(Currency.getInstance(t.getFeeCurrency().toUpperCase()))
               .build();
       trades.add(trade);
     }
     return new UserTrades(trades, lastTradeId, TradeSortType.SortByID);
   }
 
+  private static BigDecimal getFeeFromString(String value) {
+    if ("None".equals(value)) {
+      return BigDecimal.ZERO;
+    }
+    try {
+      return new BigDecimal(value);
+    } catch (NumberFormatException e) {
+      return BigDecimal.ZERO;
+    }
+  }
+
   public static Map.Entry<String, BigDecimal> findNonzeroAmount(BitstampUserTransaction transaction)
       throws ExchangeException {
     for (Map.Entry<String, BigDecimal> entry : transaction.getAmounts().entrySet()) {
@@ -294,7 +305,7 @@ public static List<FundingRecord> adaptFundingHistory(
                 type,
                 FundingRecord.Status.COMPLETE,
                 null,
-                trans.getFee(),
+                getFeeFromString(trans.getFee()),
                 null);
         fundingRecords.add(record);
       }

xchange-bitstamp/src/main/java/org/knowm/xchange/bitstamp/dto/trade/BitstampUserTransaction.java

@@ -20,7 +20,7 @@ public final class BitstampUserTransaction {
   private final long id;
   private final long order_id;
   private final TransactionType type;
-  private final BigDecimal fee;
+  private final String fee;
   private final Map<String, BigDecimal> amounts = new HashMap<>();
   // possible pairs at the moment: btcusd, btceur, eurusd, xrpusd, xrpeur, xrpbtc
   private String base; // btc, eur, xrp
@@ -41,7 +41,7 @@ public BitstampUserTransaction(
       @JsonProperty("id") long id,
       @JsonProperty("order_id") long order_id,
       @JsonProperty("type") TransactionType type,
-      @JsonProperty("fee") BigDecimal fee) {
+      @JsonProperty("fee") String fee) {
 
     this.datetime = BitstampUtils.parseDate(datetime);
     this.id = id;
@@ -88,19 +88,19 @@ public TransactionType getType() {
   }
 
   public boolean isDeposit() {
-    return type == TransactionType.deposit;
+    return type == TransactionType.deposit || type == TransactionType.rippleDeposit;
   }
 
   public boolean isWithdrawal() {
-    return type == TransactionType.withdrawal;
+    return type == TransactionType.withdrawal || type == TransactionType.rippleWithdrawal;
   }
 
   public boolean isMarketTrade() {
     return type == TransactionType.trade;
   }
 
   public boolean isSubAccountTransfer() {
-    return type == TransactionType.subAccountTransfer;
+    return type == TransactionType.subAccountTransfer || type == TransactionType.settlementTransfer;
   }
 
   public BigDecimal getCounterAmount() {
@@ -123,7 +123,7 @@ public String getBaseCurrency() {
     return base;
   }
 
-  public BigDecimal getFee() {
+  public String getFee() {
     return fee;
   }
 
@@ -169,7 +169,9 @@ public enum TransactionType {
     sentAssetsToStaking,
     stakingReward,
     referralReward,
-    interAccountTransfer;
+    interAccountTransfer,
+    settlementTransfer,
+    unknown;
 
     @JsonCreator
     public static TransactionType fromString(int type) {
@@ -194,10 +196,12 @@ public static TransactionType fromString(int type) {
           return stakingReward;
         case 32:
           return referralReward;
+        case 33:
+          return settlementTransfer;
         case 35:
           return interAccountTransfer;
         default:
-          throw new IllegalArgumentException(type + " has no corresponding value");
+          return unknown;
       }
     }
   }