From b1fcaa03ae22e429c58cdce7695ddbdaf12a83ef Mon Sep 17 00:00:00 2001
From: Nishant Das <nishdas93@gmail.com>
Date: Sat, 3 Aug 2019 19:17:46 +0530
Subject: [PATCH] Remove Statistical Package (#3129)

---
 WORKSPACE                                     |  6 ----
 .../sendDepositTx/BUILD.bazel                 |  2 --
 .../sendDepositTx/sendDeposits.go             | 36 -------------------
 3 files changed, 44 deletions(-)

diff --git a/WORKSPACE b/WORKSPACE
index 7aa418645..b57b35575 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -977,12 +977,6 @@ go_repository(
     importpath = "gopkg.in/natefinch/npipe.v2",
 )
 
-go_repository(
-    name = "org_gonum_v1_gonum",
-    commit = "70a1e933af10e87000d2ccabdd509b87d8626153",
-    importpath = "gonum.org/v1/gonum",
-)
-
 go_repository(
     name = "org_golang_x_exp",
     commit = "438050ddec5e7f808979ed57d041cebbc8e2d8a9",
diff --git a/contracts/deposit-contract/sendDepositTx/BUILD.bazel b/contracts/deposit-contract/sendDepositTx/BUILD.bazel
index b911ec10e..2550a8760 100644
--- a/contracts/deposit-contract/sendDepositTx/BUILD.bazel
+++ b/contracts/deposit-contract/sendDepositTx/BUILD.bazel
@@ -19,8 +19,6 @@ go_library(
         "@com_github_sirupsen_logrus//:go_default_library",
         "@com_github_urfave_cli//:go_default_library",
         "@com_github_x_cray_logrus_prefixed_formatter//:go_default_library",
-        "@org_golang_x_exp//rand:go_default_library",
-        "@org_gonum_v1_gonum//stat/distuv:go_default_library",
     ],
 )
 
diff --git a/contracts/deposit-contract/sendDepositTx/sendDeposits.go b/contracts/deposit-contract/sendDepositTx/sendDeposits.go
index 57fb000b1..d0709bd62 100644
--- a/contracts/deposit-contract/sendDepositTx/sendDeposits.go
+++ b/contracts/deposit-contract/sendDepositTx/sendDeposits.go
@@ -6,7 +6,6 @@ import (
 	"encoding/hex"
 	"fmt"
 	"io/ioutil"
-	"math"
 	"math/big"
 	"os"
 	"time"
@@ -24,8 +23,6 @@ import (
 	"github.com/sirupsen/logrus"
 	"github.com/urfave/cli"
 	prefixed "github.com/x-cray/logrus-prefixed-formatter"
-	rand2 "golang.org/x/exp/rand"
-	"gonum.org/v1/gonum/stat/distuv"
 )
 
 var (
@@ -43,8 +40,6 @@ func main() {
 	var numberOfDeposits int64
 	var depositAmount int64
 	var depositDelay int64
-	var variableTx bool
-	var txDeviation int64
 	var randomKey bool
 
 	customFormatter := new(prefixed.TextFormatter)
@@ -112,17 +107,6 @@ func main() {
 			Usage:       "The time delay between sending the deposits to the contract(in seconds)",
 			Destination: &depositDelay,
 		},
-		cli.BoolFlag{
-			Name:        "variableTx",
-			Usage:       "This enables variable transaction latencies to simulate real-world transactions",
-			Destination: &variableTx,
-		},
-		cli.Int64Flag{
-			Name:        "txDeviation",
-			Usage:       "The standard deviation between transaction times",
-			Value:       2,
-			Destination: &txDeviation,
-		},
 		cli.BoolFlag{
 			Name:        "random-key",
 			Usage:       "Use a randomly generated keystore key",
@@ -183,8 +167,6 @@ func main() {
 			log.Fatal(err)
 		}
 
-		statDist := buildStatisticalDist(depositDelay, numberOfDeposits, txDeviation)
-
 		validatorKeys := make(map[string]*prysmKeyStore.Key)
 		if randomKey {
 			validatorKey, err := prysmKeyStore.NewKey(rand.Reader)
@@ -221,12 +203,6 @@ func main() {
 					"Transaction Hash": fmt.Sprintf("%#x", tx.Hash()),
 				}).Infof("Deposit %d sent to contract address %v for validator with a public key %#x", i, depositContractAddr, validatorKey.PublicKey.Marshal())
 
-				// If flag is enabled make transaction times variable
-				if variableTx {
-					time.Sleep(time.Duration(math.Abs(statDist.Rand())) * time.Second)
-					continue
-				}
-
 				time.Sleep(time.Duration(depositDelay) * time.Second)
 			}
 		}
@@ -238,18 +214,6 @@ func main() {
 	}
 }
 
-func buildStatisticalDist(depositDelay int64, numberOfDeposits int64, txDeviation int64) *distuv.StudentsT {
-	src := rand2.NewSource(uint64(time.Now().Unix()))
-	dist := &distuv.StudentsT{
-		Mu:    float64(depositDelay),
-		Sigma: float64(txDeviation),
-		Nu:    float64(numberOfDeposits - 1),
-		Src:   src,
-	}
-
-	return dist
-}
-
 func loadTextFromFile(filepath string) string {
 	// #nosec - Inclusion of file via variable is OK for this tool.
 	file, err := os.Open(filepath)