150 lines
3.5 KiB
Go
150 lines
3.5 KiB
Go
// Copyright 2017 AMIS Technologies
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package container
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import (
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"context"
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"crypto/ecdsa"
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"log"
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"os"
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"path/filepath"
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"github.com/docker/docker/client"
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"github.com/ethereum/go-ethereum/common"
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"github.com/phayes/freeport"
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"github.com/getamis/istanbul-tools/genesis"
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)
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type Blockchain interface {
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Start() error
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Stop() error
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Validators() []Ethereum
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Finalize()
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}
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func NewBlockchain(numOfValidators int, options ...Option) (bc *blockchain) {
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bc = &blockchain{}
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var err error
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bc.dockerClient, err = client.NewEnvClient()
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if err != nil {
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log.Fatalf("Cannot connect to Docker daemon, err: %v", err)
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}
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keys, addrs := generateKeys(numOfValidators)
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bc.setupGenesis(addrs)
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bc.setupValidators(keys, options...)
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return bc
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}
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// ----------------------------------------------------------------------------
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type blockchain struct {
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dockerClient *client.Client
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genesisFile string
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validators []Ethereum
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}
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func (bc *blockchain) Start() error {
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for _, v := range bc.validators {
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if err := v.Start(); err != nil {
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return err
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}
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}
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return bc.connectAll()
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}
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func (bc *blockchain) Stop() error {
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for _, v := range bc.validators {
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if err := v.Stop(); err != nil {
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return err
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}
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}
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return nil
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}
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func (bc *blockchain) Finalize() {
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os.RemoveAll(filepath.Dir(bc.genesisFile))
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}
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func (bc *blockchain) Validators() []Ethereum {
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return bc.validators
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}
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// ----------------------------------------------------------------------------
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func (bc *blockchain) setupGenesis(addrs []common.Address) {
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setupDir, err := generateRandomDir()
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if err != nil {
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log.Fatal("Failed to create setup dir", err)
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}
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err = genesis.Save(setupDir, genesis.New(addrs))
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if err != nil {
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log.Fatal("Failed to save genesis", err)
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}
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bc.genesisFile = filepath.Join(setupDir, genesis.FileName)
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}
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func (bc *blockchain) setupValidators(keys []*ecdsa.PrivateKey, options ...Option) {
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for i := 0; i < len(keys); i++ {
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var opts []Option
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opts = append(opts, options...)
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// Host data directory
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dataDir, err := generateRandomDir()
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if err != nil {
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log.Fatal("Failed to create data dir", err)
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}
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opts = append(opts, HostDataDir(dataDir))
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opts = append(opts, HostPort(freeport.GetPort()))
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opts = append(opts, HostWebSocketPort(freeport.GetPort()))
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opts = append(opts, Key(keys[i]))
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geth := NewEthereum(
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bc.dockerClient,
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opts...,
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)
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err = geth.Init(bc.genesisFile)
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if err != nil {
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log.Fatal("Failed to init genesis", err)
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}
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bc.validators = append(bc.validators, geth)
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}
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}
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func (bc *blockchain) connectAll() error {
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for i, v := range bc.validators {
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istClient := v.NewIstanbulClient()
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for j, v := range bc.validators {
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if i == j {
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continue
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}
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err := istClient.AddPeer(context.Background(), v.NodeAddress())
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if err != nil {
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return err
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}
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}
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}
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return nil
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}
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