Exchange Parser

Exchange Parser for fast data transmission

This repository is all about parsing byte array to hashmap and vice versa. Why one should use byte array rather than json. There are many reasons behind that

1. Small Packet
2. Hackers cannot easily decode unless they have the schema
3. Used mainly by exchanges.

There are lots of exchanges who uses FIX/FAST protocols for encoding and decoding the packets but there are also exchanges who uses byte array as they schema for transmission of data. Which exchanges uses byte array well they are India's biggest stock exchange like NSE (National Stock Exchange) and BSE (Bombay Stock Exchange).

BSE : https://www.bseindia.com/downloads1/ETI_API_Manual_1.4.8.pdf
NSE/CM: https://www1.nseindia.com/technology/content/nnf/TP_CM_Trimmed_NNF_PROTOCOL_4.1.pdf
NSE/FO: https://www1.nseindia.com/technology/content/nnf/TP_FO_Trimmed_NNF_PROTOCOL_9.25.pdf
NSE/CD: https://www1.nseindia.com/technology/content/nnf/TP_COM_Trimmed_NNF_PROTOCOL_1.5.pdf

Using this parser you can easily convert byte array to hashmap and hashmap to byte array.

package main

import(
  "fmt"
    "byte_parser"
)	

func main(){

  // creating hashmap
  
  var jsonMap = make(map[string]interface{})

  jsonMap["BodyLen"] = 176
  jsonMap["TemplateID"] = 28500
  jsonMap["NetworkMsgID"] = ""
  jsonMap["Pad2"] = ""
  jsonMap["MsgSeqNum"] = 1
  jsonMap["SenderSubID"] = 123456
  jsonMap["Price"] = 850000000
  jsonMap["StopPx"] = 850000000
  jsonMap["MaxPricePercentage"] = 850000000
  jsonMap["SenderLocationID"] = 21212121
  jsonMap["ClOrdID"] = 43566763434
  jsonMap["MessageTag"] = 2222
  jsonMap["OrderQty"] = 2
  jsonMap["MaxShow"] = 5
  jsonMap["ExpireDate"] = 1583693033
  jsonMap["MarketSegmentID"] = 33232
  jsonMap["SimpleSecurityID"] = 545454
  jsonMap["PartyIDTakeUpTradingFirm"] = "TEST1"
  jsonMap["PartyIDOrderOriginationFirm"] = "TET"
  jsonMap["PartyIDBeneficiary"] = "TTETST"
  jsonMap["AccountType"] = 1
  jsonMap["ApplSeqIndicator"] = 2
  jsonMap["Side"] = 3
  jsonMap["OrdType"] = 2.0
  jsonMap["PriceValidityCheckType"] = 3
  jsonMap["TimeInForce"] = 3
  jsonMap["ExecInst"] = 1
  jsonMap["TradingSessionSubID"] = 2
  jsonMap["TradingCapacity"] = 4
  jsonMap["Account"] = "IN"
  jsonMap["PositionEffect"] = "Y"
  jsonMap["RegulatoryText"] = "79LABS"
  jsonMap["FreeText1"] = "79LABS"
  jsonMap["FreeText2"] = "79LABS"
  jsonMap["FreeText3"] = "79LABS"
  jsonMap["Pad3"] = "LAB"

  fmt.Println(jsonMap)

  // reading the schema of the byte array
  
  var byteParser = &byte_parser.ByteParser{
    ParserType:"json",
    Path:"D:\\pounze_go_project\\crypto_backend_engine\\src\\templates\\request_templates\\json",
    EncodingType:"bigendian",
  }
  
  // loading the schema
  
  byteParser.ParseJson()

  // converting hashmap to byte array
  
  // "28500" is the file name unique id to know the schema
  
  var byteArray = byteParser.ParseJsonToByte(jsonMap, "28500")

  fmt.Println(byteArray)

  // converting byte array to hashmap
  
  var obj =  byteParser.ParseToObject(byteArray, "28500")

  fmt.Println(obj)

}