Apply age based trade limit to offer

core/src/main/java/io/bisq/core/payment/AccountAgeWitnessService.java

@@ -20,8 +20,10 @@ package io.bisq.core.payment;
 import io.bisq.common.crypto.CryptoException;
 import io.bisq.common.crypto.KeyRing;
 import io.bisq.common.crypto.Sig;
+import io.bisq.common.locale.CurrencyUtil;
 import io.bisq.common.proto.persistable.PersistedDataHost;
 import io.bisq.common.storage.Storage;
+import io.bisq.common.util.MathUtils;
 import io.bisq.common.util.Utilities;
 import io.bisq.core.offer.Offer;
 import io.bisq.core.payment.payload.PaymentAccountPayload;
@@ -113,7 +115,7 @@ public class AccountAgeWitnessService implements PersistedDataHost {
         }
     }
 
-    private Optional<AccountAgeWitness> findWitnessByHash(String hash) {
+    public Optional<AccountAgeWitness> findWitnessByHash(String hash) {
         return accountAgeWitnessMap.containsKey(hash) ? Optional.of(accountAgeWitnessMap.get(hash)) : Optional.<AccountAgeWitness>empty();
     }
 
@@ -130,8 +132,11 @@ public class AccountAgeWitnessService implements PersistedDataHost {
         }
     }
 
-    public AccountAge getAccountAgeCategory(Offer offer) {
+    public long getAccountAge(AccountAgeWitness accountAgeWitness) {
-        final long accountAge = getAccountAge(offer);
+        return new Date().getTime() - accountAgeWitness.getDate();
+    }
+
+    public AccountAge getAccountAgeCategory(long accountAge) {
         if (accountAge < TimeUnit.DAYS.toMillis(30)) {
             return AccountAge.LESS_ONE_MONTH;
         } else if (accountAge < TimeUnit.DAYS.toMillis(60)) {
@@ -154,12 +159,69 @@ public class AccountAgeWitnessService implements PersistedDataHost {
         return getWitnessHash(paymentAccountPayload, paymentAccountPayload.getSalt());
     }
 
+    public String getWitnessHashAsHex(PaymentAccountPayload paymentAccountPayload) {
+        return Utilities.bytesAsHexString(getWitnessHash(paymentAccountPayload));
+    }
+
     private byte[] getWitnessHash(PaymentAccountPayload paymentAccountPayload, byte[] salt) {
         byte[] ageWitnessInputData = paymentAccountPayload.getAgeWitnessInputData();
         final byte[] combined = ArrayUtils.addAll(ageWitnessInputData, salt);
         return Sha256Hash.hash(combined);
     }
 
+    public long getTradeLimit(PaymentAccount paymentAccount, String currencyCode) {
+        final long maxTradeLimit = paymentAccount.getPaymentMethod().getMaxTradeLimitAsCoin(currencyCode).value;
+        if (CurrencyUtil.isFiatCurrency(currencyCode)) {
+            double factor;
+
+            Optional<AccountAgeWitness> accountAgeWitnessOptional = findWitnessByHash(getWitnessHashAsHex(paymentAccount.getPaymentAccountPayload()));
+            AccountAge accountAgeCategory = accountAgeWitnessOptional.isPresent() ?
+                    getAccountAgeCategory(getAccountAge((accountAgeWitnessOptional.get()))) :
+                    AccountAgeWitnessService.AccountAge.LESS_ONE_MONTH;
+
+            // TODO Fade in by date can be removed after feb 2018
+            // We want to fade in the limit over 2 months to avoid that all users get limited to 25% of the limit when 
+            // we deploy that feature.
+            final Date now = new Date();
+            final Date dez = new GregorianCalendar(2017, GregorianCalendar.DECEMBER, 1).getTime();
+            final Date jan = new GregorianCalendar(2017, GregorianCalendar.JANUARY, 1).getTime();
+            final Date feb = new GregorianCalendar(2017, GregorianCalendar.FEBRUARY, 1).getTime();
+
+            switch (accountAgeCategory) {
+                case TWO_MONTHS_OR_MORE:
+                    factor = 1;
+                    break;
+                case ONE_TO_TWO_MONTHS:
+                    if (now.before(dez)) {
+                        factor = 1;
+                    } else if (now.before(jan)) {
+                        factor = 0.9;
+                    } else if (now.before(feb)) {
+                        factor = 0.75;
+                    } else {
+                        factor = 0.5;
+                    }
+                    break;
+                case LESS_ONE_MONTH:
+                default:
+                    if (now.before(dez)) {
+                        factor = 1;
+                    } else if (now.before(jan)) {
+                        factor = 0.8;
+                    } else if (now.before(feb)) {
+                        factor = 0.5;
+                    } else {
+                        factor = 0.25;
+                    }
+                    break;
+            }
+
+            return MathUtils.roundDoubleToLong((double) maxTradeLimit * factor);
+        } else {
+            return maxTradeLimit;
+        }
+    }
+
     boolean verifyAgeWitness(byte[] peersAgeWitnessInputData,
                              AccountAgeWitness witness,
                              byte[] peersSalt,

gui/src/main/java/io/bisq/gui/components/PeerInfoIcon.java

@@ -57,7 +57,7 @@ public class PeerInfoIcon extends Group {
 
         // outer circle
         Color ringColor;
-        switch (accountAgeWitnessService.getAccountAgeCategory(offer)) {
+        switch (accountAgeWitnessService.getAccountAgeCategory(accountAgeWitnessService.getAccountAge(offer))) {
             case TWO_MONTHS_OR_MORE:
                 ringColor = Color.rgb(0, 225, 0); // > 2 months green
                 break;

gui/src/main/java/io/bisq/gui/main/offer/createoffer/CreateOfferDataModel.java

@@ -333,7 +333,7 @@ class CreateOfferDataModel extends ActivatableDataModel {
         checkNotNull(p2PService.getAddress(), "Address must not be null");
         checkNotNull(getMakerFee(), "makerFee must not be null");
       
-        long maxTradeLimit = paymentAccount.getPaymentMethod().getMaxTradeLimitAsCoin(currencyCode).value;
+        long maxTradeLimit = accountAgeWitnessService.getTradeLimit(paymentAccount, currencyCode);
         long maxTradePeriod = paymentAccount.getPaymentMethod().getMaxTradePeriod();
 
         // reserved for future use cases
@@ -346,8 +346,8 @@ class CreateOfferDataModel extends ActivatableDataModel {
         String hashOfChallenge = null;
         HashMap<String, String> extraDataMap = new HashMap<>();
 
-        byte[] hashOfPaymentAccount = accountAgeWitnessService.getWitnessHash(paymentAccount.getPaymentAccountPayload());
+        final String hashOfPaymentAccountAsHex = accountAgeWitnessService.getWitnessHashAsHex(paymentAccount.getPaymentAccountPayload());
-        extraDataMap.put(OfferPayload.ACCOUNT_AGE_WITNESS_HASH, Utilities.bytesAsHexString(hashOfPaymentAccount));
+        extraDataMap.put(OfferPayload.ACCOUNT_AGE_WITNESS_HASH, hashOfPaymentAccountAsHex);
 
         Coin buyerSecurityDepositAsCoin = buyerSecurityDeposit.get();
         checkArgument(buyerSecurityDepositAsCoin.compareTo(Restrictions.getMaxBuyerSecurityDeposit()) <= 0,