add trader id to SignedOffer

core/src/main/java/haveno/core/api/CoreDisputesService.java

@@ -236,7 +236,7 @@ public class CoreDisputesService {
                     .add(buyerSecurityDeposit));
         } else if (payout == DisputePayout.CUSTOM) {
             if (customWinnerAmount > trade.getWallet().getBalance().longValueExact()) {
-                throw new RuntimeException("The custom winner payout amount is more than the trade wallet's balance");
+                throw new RuntimeException("Winner payout is more than the trade wallet's balance");
             }
             long loserAmount = tradeAmount.add(buyerSecurityDeposit).add(sellerSecurityDeposit).subtract(BigInteger.valueOf(customWinnerAmount)).longValueExact();
             disputeResult.setBuyerPayoutAmount(BigInteger.valueOf(disputeResult.getWinner() == DisputeResult.Winner.BUYER ? customWinnerAmount : loserAmount));

core/src/main/java/haveno/core/offer/OpenOfferManager.java

@@ -1007,6 +1007,7 @@ public class OpenOfferManager implements PeerManager.Listener, DecryptedDirectMe
             // create record of signed offer
             SignedOffer signedOffer = new SignedOffer(
                     System.currentTimeMillis(),
+                    signedOfferPayload.getPubKeyRing().hashCode(), // trader id
                     signedOfferPayload.getId(),
                     offer.getAmount().longValueExact(),
                     txResult.second.longValueExact(),

core/src/main/java/haveno/core/offer/SignedOffer.java

@@ -18,6 +18,8 @@
 package haveno.core.offer;
 
 import haveno.common.proto.persistable.PersistablePayload;
+import haveno.core.util.JsonUtil;
+
 import java.util.List;
 import lombok.EqualsAndHashCode;
 import lombok.Getter;
@@ -30,6 +32,8 @@ public final class SignedOffer implements PersistablePayload {
     @Getter
     private final long timeStamp;
     @Getter
+    private int traderId;
+    @Getter
     private final String offerId;
     @Getter
     private final long tradeAmount;
@@ -47,6 +51,7 @@ public final class SignedOffer implements PersistablePayload {
     private final String arbitratorSignature;
     
     public SignedOffer(long timeStamp,
+                       int traderId,
                        String offerId,
                        long tradeAmount,
                        long penaltyAmount,
@@ -56,6 +61,7 @@ public final class SignedOffer implements PersistablePayload {
                        long reserveTxMinerFee,
                        String arbitratorSignature) {
         this.timeStamp = timeStamp;
+        this.traderId = traderId;
         this.offerId = offerId;
         this.tradeAmount = tradeAmount;
         this.penaltyAmount = penaltyAmount;
@@ -74,6 +80,7 @@ public final class SignedOffer implements PersistablePayload {
     public protobuf.SignedOffer toProtoMessage() {
         protobuf.SignedOffer.Builder builder = protobuf.SignedOffer.newBuilder()
                 .setTimeStamp(timeStamp)
+                .setTraderId(traderId)
                 .setOfferId(offerId)
                 .setTradeAmount(tradeAmount)
                 .setPenaltyAmount(penaltyAmount)
@@ -87,6 +94,7 @@ public final class SignedOffer implements PersistablePayload {
 
     public static SignedOffer fromProto(protobuf.SignedOffer proto) {
         return new SignedOffer(proto.getTimeStamp(),
+                               proto.getTraderId(),
                                proto.getOfferId(),
                                proto.getTradeAmount(),
                                proto.getPenaltyAmount(),
@@ -102,10 +110,15 @@ public final class SignedOffer implements PersistablePayload {
     // Getters
     ///////////////////////////////////////////////////////////////////////////////////////////
 
+    public String toJson() {
+        return JsonUtil.objectToJson(this);
+    }
+
     @Override
     public String toString() {
         return "SignedOffer{" +
                 ",\n     timeStamp=" + timeStamp +
+                ",\n     traderId=" + traderId +
                 ",\n     offerId=" + offerId +
                 ",\n     tradeAmount=" + tradeAmount +
                 ",\n     penaltyAmount=" + penaltyAmount +

proto/src/main/proto/pb.proto

@@ -1348,14 +1348,15 @@ message SignedOfferList {
 
 message SignedOffer {
     int64 time_stamp = 1;
-    string offer_id = 2;
-    uint64 trade_amount = 3;
-    uint64 penalty_amount = 4;
-    string reserve_tx_hash = 5;
-    string reserve_tx_hex = 6;
-    repeated string reserve_tx_key_images = 7;
-    uint64 reserve_tx_miner_fee = 8;
-    string arbitrator_signature = 9;
+    int32 trader_id = 2;
+    string offer_id = 3;
+    uint64 trade_amount = 4;
+    uint64 penalty_amount = 5;
+    string reserve_tx_hash = 6;
+    string reserve_tx_hex = 7;
+    repeated string reserve_tx_key_images = 8;
+    uint64 reserve_tx_miner_fee = 9;
+    string arbitrator_signature = 10;
 }
 
 message OpenOffer {