squash the commits

Update LICENSE

Signed-off-by: Ahmed Al Salih <ahmed82@users.noreply.github.com>
Signed-off-by: Yongge Wang <yongge.wang@gmail.com>

Author: yonggewang

.travis.yml

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+language: go
+go:
+    - 1.13.x
+
+before_install:
+    - go get -t -v ./...
+
+install:
+    - go get github.com/yonggewang/bdls/
+
+script:
+    - go test -v -coverprofile=coverage.txt.tmp -covermode=atomic -timeout 12h -run "(Verify)|(Full20Participants)|(Propose)|(Round)|(Commit)|(Lock)|(Stage)"
+    - cat coverage.txt.tmp | grep -v "pb.go" > coverage.txt
+    - rm coverage.txt.tmp
+
+after_success:
+    - bash <(curl -s https://codecov.io/bash)

LICENSE

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README.md

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+# BDLS
+Efficient BFT in partial synchronous networks 
+
+[![GoDoc][1]][2] [![License][3]][4] [![Build Status][5]][6] [![Go Report Card][7]][8] [![Coverage Statusd][9]][10] [![Sourcegraph][11]][12]
+
+[1]: https://godoc.org/github.com/Sperax/bdls?status.svg
+[2]: https://godoc.org/github.com/Sperax/bdls
+[3]: https://img.shields.io/github/license/Sperax/bdls
+[4]: LICENSE
+[5]: https://travis-ci.org/Sperax/bdls.svg?branch=master
+[6]: https://travis-ci.org/Sperax/bdls
+[7]: https://goreportcard.com/badge/github.com/Sperax/bdls?bdls
+[8]: https://goreportcard.com/report/github.com/Sperax/bdls
+[9]: https://codecov.io/gh/Sperax/bdls/branch/master/graph/badge.svg
+[10]: https://codecov.io/gh/Sperax/bdls
+[11]: https://sourcegraph.com/github.com/Sperax/bdls/-/badge.svg
+[12]: https://sourcegraph.com/github.com/Sperax/bdls?badge
+
+# BDLS Consensus
+
+## Introduction
+
+BDLS is an innovative BFT consensus algorithm that features safety and liveness by
+presenting a mathematically proven secure BFT protocol that is resilient in open networks such as
+the Internet. BDLS overcomes many problems, such as the deadlock problem caused by unreliable
+p2p/broadcast channels. These problems are all very relevant to existing realistic open
+network scenarios, and are the focus of extensive work in improving Internet security, but it
+is an area largely ignored by most in mainstream BFT protocol design.
+(Paper: https://eprint.iacr.org/2019/1460.pdf)
+
+For this library, to make the runtime behavior of consensus algorithm predictable as function:
+y = f(x, t), where 'x' is the message it received, and 't' is the time while being called,
+  then'y' is the deterministic status of consensus after 'x' and 't' applied to 'f',
+it has been designed in a deterministic scheme, without parallel computing, networking, and
+the correctness of program implementation can be proven with proper test cases.
+
+## License
+
+The source code files are made available under the Apache License, Version 2.0 (Apache-2.0), located in the [LICENSE](LICENSE) file.
+
+## Features
+
+1. Pure algorithm implementation in deterministic and predictable behavior, easily to be integrated into existing projects, refer to [DFA](https://en.wikipedia.org/wiki/Deterministic_finite_automaton) for more.
+2. Well-tested on various platforms with complicated cases.
+3. Auto back-off under heavy payload, guaranteed finalization(worst case gurantee).
+4. Easy integratation into Blockchain & non-Blockchain consensus, like [WAL replication](https://en.wikipedia.org/wiki/Replication_(computing)#Database_replication) in database.
+5. Builtin network emulation for various network latency with comprehensive statistics.
+
+## Documentation
+
+For complete documentation, see the associated [Godoc](https://pkg.go.dev/github.com/Sperax/bdls).
+
+
+## Install BDLS on Ubuntu Server 20.04 
+
+```
+sudo apt-get update
+sudo apt-get -y upgrade
+sudo apt-get install autoconf automake libtool curl make g++ unzip
+cd /tmp
+wget https://go.dev/dl/go1.17.5.linux-amd64.tar.gz
+sudo tar -xvf go1.17.5.linux-amd64.tar.gz
+sudo mv go /usr/local
+cd
+echo 'export GOROOT=/usr/local/go' >> .profile
+echo 'export GOPATH=$HOME/go' >> .profile
+echo 'export PATH=$GOPATH/bin:$GOROOT/bin:$PATH' >> .profile
+source ~/.profile 
+go version
+go env
+git clone https://github.com/yonggewang/bdls.git
+cd bdls/
+git checkout master
+cd cmd/emucon/
+go build .
+./emucon help genkeys
+./emucon genkeys --count 4
+
+[open four terminals to run four participants. if you log to remote Linux, 
+you may use tmux commands. In tmux, you can switch termian using "ctrl+b d" 
+and use "tmux attach -t 0" to enter the terminal. Use "tmux list-session" 
+to check the current active terminals]
+
+
+./emucon run --id 0 --listen ":4680
+./emucon run --id 1 --listen ":4681"
+./emucon run --id 2 --listen ":4682"
+./emucon run --id 3 --listen ":4683"
+
+cd ../..
+go test -v -cpuprofile=cpu.out -memprofile=mem.out -timeout 2h
+```
+## Regenerate go.mod and go.sum
+```
+rm go.*
+go mod init github.com/yonggewang/bdls
+go mod tidy
+go mod vendor
+```
+
+See benchmark ourput at: [AMD-NORMAL.TXT](benchmarks/AMD-NORMAL.TXT) and [PI4-OVERLOAD.TXT](benchmarks/PI4-OVERLOAD.TXT)
+
+## Specification
+
+1. Consensus messages are specified in [message.proto](message.proto), users of this library can encapsulate this message in a carrier message, like gossip in TCP.
+2. Consensus algorithm is **NOT** thread-safe, it **MUST** be protected by some synchronization mechanism, like `sync.Mutex` or `chan` + `goroutine`.
+
+## Usage
+
+1. A testing IPC peer -- [ipc_peer.go](ipc_peer.go)
+2. A testing TCP node -- [TCP based Consensus Emualtor](cmd/emucon)
+
+## Status
+
+On-going

agent-tcp/doc.go

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+// Package agent-tcp implements a TCP based agent to participate in consensus
+// Challenge-Response scheme has been adopted to do interactive authentication
+package agent

agent-tcp/ecdh.go

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+// BSD 3-Clause License
+//
+// Copyright (c) 2020, Sperax
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+//
+// 1. Redistributions of source code must retain the above copyright notice, this
+//    list of conditions and the following disclaimer.
+//
+// 2. Redistributions in binary form must reproduce the above copyright notice,
+//    this list of conditions and the following disclaimer in the documentation
+//    and/or other materials provided with the distribution.
+//
+// 3. Neither the name of the copyright holder nor the names of its
+//    contributors may be used to endorse or promote products derived from
+//    this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+package agent
+
+import (
+	"crypto/ecdsa"
+	"math/big"
+)
+
+func ECDH(publicKey *ecdsa.PublicKey, key *ecdsa.PrivateKey) *big.Int {
+	secret, _ := key.Curve.ScalarMult(publicKey.X, publicKey.Y, key.D.Bytes())
+	return secret
+}