Trading (requester sends):
Client: Len    7 [TradeRequest] | 07 00
1A              // pcode
C5 09 00 10     // objectID of partner

Trade receiver recieves:
Server: Len    7 [SendTradeRequest]
07 00
70             // pcode
CE 09 00 10    // object ID of person who wants to trade to you

Trade receiver responds:
Client: Len    7 [AnswerTradeRequest]
07 00
55             // pcode
01 00 00 00    // 1 - ok, 0 - cancel

// then both (requester and receiver) receive
Server: Len  189 [TradeStart]
BD 00
14               // pcode
C5 09 00 10      // partner objectID
03 00            // items count (your inv)
   ///   for each item
04 00         // item type1
CF 09 00 10   // item oid
D4 15 00 00   // item iid
01 00 00 00   // item count
05 00         // item type2
00 00         // 00
00 00 00 00   // body part
00 00         // enchant
00 00 00 00   // 0000
FE FF FF FF  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 // attribs

Server: Len   65 [TradeOtherAdd]
41 00
1B            // pcode
01 00         // item cnt
04 00         // type1
C0 09 00 10   // oid
39 00 00 00   // iid
0D 00 00 00   // cnt
04 00         // type2
00 00         // 00
00 00 00 00   // b.part
00 00         // enchatnt
00 00 00 00   // 00 ??
FE FF FF FF  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00 // attribs

Client: Len   15 [AddTradeItem]
0F 00
1B              // pcode
01 00 00 00     // tradeId? O_o wtf L2J ignores this
D1 09 00 10     // objectID
01 00 00 00     // count

Server: Len   65 [TradeOwnAdd]
41 00
1A             // pcode
01 00          // count
04 00          // type1
D1 09 00 10    // oid
9A 29 00 00    // iid
01 00 00 00    // cnt
05 00          // type2
00 00          // 00
00 00 00 00    // b.part
00 00          // enchant
00 00 00 00    // 00
FE FF FF FF  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  00 00 00 00  // attribs

Client: Len    7 [TradeDone]
07 00
1C              // pcode
01 00 00 00     // num; 1 - confirm, 0 - cancel trade

Server: Len    7 [TradeDone]
07 00
1C              // pcode
01 00 00 00     // num; 1 - confirm, 0 - cancel trade
