From 2031ec09df10903d1a9522c54a8be4df951938fa Mon Sep 17 00:00:00 2001
From: Minh Doan <minh@simple-rules.com>
Date: Tue, 4 Dec 2018 13:06:55 -0800
Subject: [PATCH] get rid of unused code

---
 p2p/ida/errors.go    | 23 -------------
 p2p/ida/ida.go       | 37 ---------------------
 p2p/ida/ida_test.go  | 77 --------------------------------------------
 p2p/ida/interface.go | 25 --------------
 4 files changed, 162 deletions(-)
 delete mode 100644 p2p/ida/errors.go
 delete mode 100644 p2p/ida/ida.go
 delete mode 100644 p2p/ida/ida_test.go
 delete mode 100644 p2p/ida/interface.go

diff --git a/p2p/ida/errors.go b/p2p/ida/errors.go
deleted file mode 100644
index 6552e2f33..000000000
--- a/p2p/ida/errors.go
+++ /dev/null
@@ -1,23 +0,0 @@
-// Copyright (c) 2014, Suryandaru Triandana <syndtr@gmail.com>
-// All rights reserved.
-//
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Package ida errors provides common error types used throughout leveldb.
-package ida
-
-import (
-	"errors"
-)
-
-// Common errors.
-var (
-	ErrRaptorImpNotFound = New("raptor implementation: not found")
-	ErrTimeOut           = New("timeout: time's up now")
-)
-
-// New returns an error that formats as the given text.
-func New(text string) error {
-	return errors.New(text)
-}
diff --git a/p2p/ida/ida.go b/p2p/ida/ida.go
deleted file mode 100644
index 23351a768..000000000
--- a/p2p/ida/ida.go
+++ /dev/null
@@ -1,37 +0,0 @@
-package ida
-
-import (
-	"time"
-
-	"github.com/harmony-one/harmony/p2p"
-)
-
-// IDAImp implements IDA interface.
-type IDAImp struct {
-	raptorQImp RaptorQ
-}
-
-// TakeRaptorQ takes RaptorQ implementation.
-func (ida *IDAImp) TakeRaptorQ(raptorQImp RaptorQ) {
-	ida.raptorQImp = raptorQImp
-}
-
-// Process implements very simple IDA logic.
-func (ida *IDAImp) Process(msg Message, peers []p2p.Peer, done chan struct{}, timeout time.Duration) error {
-	if ida.raptorQImp == nil {
-		return ErrRaptorImpNotFound
-	}
-	chunkStream := ida.raptorQImp.Process(msg)
-	id := 0
-	for {
-		select {
-		case <-done:
-			return nil
-		case <-time.After(timeout):
-			return ErrTimeOut
-		case chunk := <-chunkStream:
-			p2p.SendMessage(peers[id], chunk)
-			id++
-		}
-	}
-}
diff --git a/p2p/ida/ida_test.go b/p2p/ida/ida_test.go
deleted file mode 100644
index d48c16644..000000000
--- a/p2p/ida/ida_test.go
+++ /dev/null
@@ -1,77 +0,0 @@
-package ida
-
-import (
-	"math/rand"
-	"testing"
-	"time"
-
-	"github.com/harmony-one/harmony/p2p"
-)
-
-var (
-	a = Symbol{0, 0}
-	b = Symbol{1, 0}
-	c = Symbol{0, 1}
-	d = Symbol{1, 1}
-)
-
-type FakeRaptor struct {
-	symbols []Symbol
-	done    chan struct{}
-	r       *rand.Rand
-}
-
-func (raptor *FakeRaptor) Init() {
-	// raptor.symbols = make([]Symbol, 4)
-	raptor.symbols = make([]Symbol, 4)
-	raptor.symbols[0] = make(Symbol, 2)
-	copy(raptor.symbols[0], a)
-	raptor.symbols[1] = make(Symbol, 2)
-	copy(raptor.symbols[1], b)
-	raptor.symbols[2] = make(Symbol, 2)
-	copy(raptor.symbols[2], c)
-	raptor.symbols[3] = make(Symbol, 2)
-	copy(raptor.symbols[3], d)
-	raptor.r = rand.New(rand.NewSource(99))
-	raptor.done = make(chan struct{})
-}
-
-func (raptor *FakeRaptor) generate(res chan Symbol) {
-	for {
-		select {
-		case <-raptor.done:
-			return
-		default:
-			i := raptor.r.Intn(4)
-			res <- raptor.symbols[i]
-		}
-	}
-}
-
-func (raptor *FakeRaptor) Process(msg Message) chan Symbol {
-	res := make(chan Symbol)
-	go raptor.generate(res)
-	return res
-}
-
-func TestShouldReturnErrRaptorImpNotFound(t *testing.T) {
-	ida := &IDAImp{}
-	done := make(chan struct{})
-	err := ida.Process([]byte{}, []p2p.Peer{}, done, time.Second)
-	if err != ErrRaptorImpNotFound {
-		t.Fatal("Should return an error")
-	}
-}
-
-func TestSimple(t *testing.T) {
-	raptor := &FakeRaptor{}
-	raptor.Init()
-
-	// ida := &IDAImp{}
-	// done := make(chan struct{})
-	// ida.TakeRaptorQ(raptor)
-	// err := ida.Process([]byte{}, []p2p.Peer{}, done, time.Second)
-	// if err == ErrRaptorImpNotFound {
-	// 	t.Fatal("Should return an error")
-	// }
-}
diff --git a/p2p/ida/interface.go b/p2p/ida/interface.go
deleted file mode 100644
index bb6c3f446..000000000
--- a/p2p/ida/interface.go
+++ /dev/null
@@ -1,25 +0,0 @@
-package ida
-
-import (
-	"time"
-
-	"github.com/harmony-one/harmony/p2p"
-)
-
-// Symbol is produced from a RaptorQ implementation.
-type Symbol []byte
-
-// Message is type of general message gopssiped
-type Message []byte
-
-// RaptorQ interface.
-type RaptorQ interface {
-	Init()
-	Process(msg Message) chan Symbol
-}
-
-// IDA interface.
-type IDA interface {
-	TakeRaptorQ(raptorQImp *RaptorQ)
-	Process(msg Message, peers []p2p.Peer, done chan struct{}, timeout time.Duration) error
-}