区块链教程Fabric1.0源代码分析配置交易-生成通道配置二。Generator接口实现，即bootstrapper。
type bootstrapper struct {
channelGroups []*cb.ConfigGroup
ordererGroups []*cb.ConfigGroup
applicationGroups []*cb.ConfigGroup
consortiumsGroups []*cb.ConfigGroup
}
func New(conf *genesisconfig.Profile) Generator
func (bs *bootstrapper) ChannelTemplate() configtx.Template
func (bs *bootstrapper) GenesisBlock() *cb.Block
func (bs *bootstrapper) GenesisBlockForChannel(channelID string) *cb.Block
//代码在common/configtx/tool/provisional/provisional.gofunc New(conf *genesisconfig.Profile) Generator代码如下：
func New(conf *genesisconfig.Profile) Generator {
bs := &bootstrapper{
channelGroups: []*cb.ConfigGroup{
config.DefaultHashingAlgorithm(), //默认哈希函数
config.DefaultBlockDataHashingStructure(), //默认块数据哈希结构
//默认通道策略，包括读策略、写策略和管理策略
//ReadersPolicyKey = "Readers"，ImplicitMetaPolicy_ANY，任意
policies.TemplateImplicitMetaAnyPolicy([]string{}, configvaluesmsp.ReadersPolicyKey),
//WritersPolicyKey = "Writers"，ImplicitMetaPolicy_ANY，任意
policies.TemplateImplicitMetaAnyPolicy([]string{}, configvaluesmsp.WritersPolicyKey),
//AdminsPolicyKey = "Admins"，ImplicitMetaPolicy_MAJORITY，大多数
policies.TemplateImplicitMetaMajorityPolicy([]string{}, configvaluesmsp.AdminsPolicyKey),
},
}
if conf.Orderer != nil { //系统通道配置
oa := config.TemplateOrdererAddresses(conf.Orderer.Addresses) //设置Orderer地址
oa.Values[config.OrdererAddressesKey].ModPolicy = OrdererAdminsPolicy //OrdererAdminsPolicy = "/Channel/Orderer/Admins"
bs.ordererGroups = []*cb.ConfigGroup{
oa,
config.TemplateConsensusType(conf.Orderer.OrdererType), //设置共识插件类型
config.TemplateBatchSize(&ab.BatchSize{ //设置批处理大小
MaxMessageCount: conf.Orderer.BatchSize.MaxMessageCount,
AbsoluteMaxBytes: conf.Orderer.BatchSize.AbsoluteMaxBytes,
PreferredMaxBytes: conf.Orderer.BatchSize.PreferredMaxBytes,
}),
config.TemplateBatchTimeout(conf.Orderer.BatchTimeout.String()), //设置批处理超时
config.TemplateChannelRestrictions(conf.Orderer.MaxChannels), //设置最大通道数
//初始化Orderer读、写、管理策略
policies.TemplateImplicitMetaPolicyWithSubPolicy([]string{config.OrdererGroupKey}, BlockValidationPolicyKey, configvaluesmsp.WritersPolicyKey, cb.ImplicitMetaPolicy_ANY),
policies.TemplateImplicitMetaAnyPolicy([]string{config.OrdererGroupKey}, configvaluesmsp.ReadersPolicyKey),
policies.TemplateImplicitMetaAnyPolicy([]string{config.OrdererGroupKey}, configvaluesmsp.WritersPolicyKey),
policies.TemplateImplicitMetaMajorityPolicy([]string{config.OrdererGroupKey}, configvaluesmsp.AdminsPolicyKey),
}
for _, org := range conf.Orderer.Organizations {
mspConfig, err := msp.GetVerifyingMspConfig(org.MSPDir, org.ID)
bs.ordererGroups = append(bs.ordererGroups,
configvaluesmsp.TemplateGroupMSPWithAdminRolePrincipal([]string{config.OrdererGroupKey, org.Name},
mspConfig, org.AdminPrincipal == genesisconfig.AdminRoleAdminPrincipal,
),
)
}
switch conf.Orderer.OrdererType {
case ConsensusTypeSolo:
case ConsensusTypeKafka:
bs.ordererGroups = append(bs.ordererGroups, config.TemplateKafkaBrokers(conf.Orderer.Kafka.Brokers)) //设置Kafka
default:
}
}
if conf.Application != nil { //应用通道配置
bs.applicationGroups = []*cb.ConfigGroup{
policies.TemplateImplicitMetaAnyPolicy([]string{config.ApplicationGroupKey}, configvaluesmsp.ReadersPolicyKey),
policies.TemplateImplicitMetaAnyPolicy([]string{config.ApplicationGroupKey}, configvaluesmsp.WritersPolicyKey),
policies.TemplateImplicitMetaMajorityPolicy([]string{config.ApplicationGroupKey}, configvaluesmsp.AdminsPolicyKey),
}
for _, org := range conf.Application.Organizations {
mspConfig, err := msp.GetVerifyingMspConfig(org.MSPDir, org.ID)
bs.applicationGroups = append(bs.applicationGroups,
configvaluesmsp.TemplateGroupMSPWithAdminRolePrincipal([]string{config.ApplicationGroupKey, org.Name},
mspConfig, org.AdminPrincipal == genesisconfig.AdminRoleAdminPrincipal,
),
)
var anchorProtos []*pb.AnchorPeer
for _, anchorPeer := range org.AnchorPeers {
anchorProtos = append(anchorProtos, &pb.AnchorPeer{
Host: anchorPeer.Host,
Port: int32(anchorPeer.Port),
})
}
bs.applicationGroups = append(bs.applicationGroups, config.TemplateAnchorPeers(org.Name, anchorProtos))
}
}
if conf.Consortiums != nil { //联盟相关
tcg := config.TemplateConsortiumsGroup()
tcg.Groups[config.ConsortiumsGroupKey].ModPolicy = OrdererAdminsPolicy
tcg.Groups[config.ConsortiumsGroupKey].Policies[configvaluesmsp.AdminsPolicyKey] = &cb.ConfigPolicy{
Policy: &cb.Policy{
Type: int32(cb.Policy_SIGNATURE),
Value: utils.MarshalOrPanic(cauthdsl.AcceptAllPolicy),
},
ModPolicy: OrdererAdminsPolicy,
}
bs.consortiumsGroups = append(bs.consortiumsGroups, tcg)
for consortiumName, consortium := range conf.Consortiums {
cg := config.TemplateConsortiumChannelCreationPolicy(consortiumName, policies.ImplicitMetaPolicyWithSubPolicy(
configvaluesmsp.AdminsPolicyKey,
cb.ImplicitMetaPolicy_ANY,
).Policy)
cg.Groups[config.ConsortiumsGroupKey].Groups[consortiumName].ModPolicy = OrdererAdminsPolicy
cg.Groups[config.ConsortiumsGroupKey].Groups[consortiumName].Values[config.ChannelCreationPolicyKey].ModPolicy = OrdererAdminsPolicy
bs.consortiumsGroups = append(bs.consortiumsGroups, cg)
for _, org := range consortium.Organizations {
mspConfig, err := msp.GetVerifyingMspConfig(org.MSPDir, org.ID)
bs.consortiumsGroups = append(bs.consortiumsGroups,
configvaluesmsp.TemplateGroupMSPWithAdminRolePrincipal(
[]string{config.ConsortiumsGroupKey, consortiumName, org.Name},
mspConfig, org.AdminPrincipal == genesisconfig.AdminRoleAdminPrincipal,
),
)
}
}
}
return bs
}
//代码在common/configtx/tool/provisional/provisional.gofunc (bs bootstrapper) GenesisBlockForChannel(channelID string) cb.Block代码如下：
func (bs *bootstrapper) GenesisBlockForChannel(channelID string) *cb.Block {
block, err := genesis.NewFactoryImpl(
configtx.NewModPolicySettingTemplate(
configvaluesmsp.AdminsPolicyKey,
configtx.NewCompositeTemplate(
configtx.NewSimpleTemplate(bs.consortiumsGroups...),
bs.ChannelTemplate(),
),
),
).Block(channelID)
return block
}
//代码在common/configtx/tool/provisional/provisional.go5、configtxgen命令
5.1、main函数
func main() {
var outputBlock, outputChannelCreateTx, profile, channelID, inspectBlock, inspectChannelCreateTx, outputAnchorPeersUpdate, asOrg string
//-outputBlock，初始区块写入指定文件
flag.StringVar(&outputBlock, "outputBlock", "", "The path to write the genesis block to (if set)")
//-channelID，指定通道名称
flag.StringVar(&channelID, "channelID", provisional.TestChainID, "The channel ID to use in the configtx")
//-outputCreateChannelTx，将通道创建交易写入指定文件
flag.StringVar(&outputChannelCreateTx, "outputCreateChannelTx", "", "The path to write a channel creation configtx to (if set)")
//-profile，指定profile
flag.StringVar(&profile, "profile", genesisconfig.SampleInsecureProfile, "The profile from configtx.yaml to use for generation.")
//-inspectBlock，打印指定区块的配置信息
flag.StringVar(&inspectBlock, "inspectBlock", "", "Prints the configuration contained in the block at the specified path")
//-inspectChannelCreateTx，打印通道创建交易文件中的配置更新信息
flag.StringVar(&inspectChannelCreateTx, "inspectChannelCreateTx", "", "Prints the configuration contained in the transaction at the specified path")
//-outputAnchorPeersUpdate，生成锚节点配置更新文件，需同时指定-asOrg
flag.StringVar(&outputAnchorPeersUpdate, "outputAnchorPeersUpdate", "", "Creates an config update to update an anchor peer (works only with the default channel creation, and only for the first update)")
//-asOrg，以指定身份执行更新配置交易，如更新锚节点配置信息
flag.StringVar(&asOrg, "asOrg", "", "Performs the config generation as a particular organization (by name), only including values in the write set that org (likely) has privilege to set")
flag.Parse()
factory.InitFactories(nil)
config := genesisconfig.Load(profile) //读取指定配置
if outputBlock != "" { //生成Orderer服务启动的初始区块
err := doOutputBlock(config, channelID, outputBlock)
}
if outputChannelCreateTx != "" { //生成新建应用通道的配置交易
err := doOutputChannelCreateTx(config, channelID, outputChannelCreateTx)
}
if outputAnchorPeersUpdate != "" { //生成锚节点配置更新文件
err := doOutputAnchorPeersUpdate(config, channelID, outputAnchorPeersUpdate, asOrg)
}
}
//代码在common/configtx/tool/configtxgen/main.go5.2、doOutputBlock（生成Orderer服务启动的初始区块，即系统通道的初始区块文件）
func doOutputBlock(config *genesisconfig.Profile, channelID string, outputBlock string) error {
pgen := provisional.New(config) //构建Generator实例
genesisBlock := pgen.GenesisBlockForChannel(channelID) //生成创世区块
err := ioutil.WriteFile(outputBlock, utils.MarshalOrPanic(genesisBlock), 0644) //创世区块写入文件
return nil
}
//代码在common/configtx/tool/configtxgen/main.gogenesis更详细内容，参考：Fabric 1.0源代码笔记 之 configtx（配置交易） #genesis（系统通道创世区块）
5.3、doOutputChannelCreateTx（生成新建应用通道的配置交易）
func doOutputChannelCreateTx(conf *genesisconfig.Profile, channelID string, outputChannelCreateTx string) error {
var orgNames []string
for _, org := range conf.Application.Organizations {
orgNames = append(orgNames, org.Name)
}
configtx, err := configtx.MakeChainCreationTransaction(channelID, conf.Consortium, nil, orgNames...)
err = ioutil.WriteFile(outputChannelCreateTx, utils.MarshalOrPanic(configtx), 0644)
return nil
}
//代码在common/configtx/tool/configtxgen/main.go5.4、doOutputAnchorPeersUpdate（生成锚节点配置更新文件）
func doOutputAnchorPeersUpdate(conf *genesisconfig.Profile, channelID string, outputAnchorPeersUpdate string, asOrg string) error {
var org *genesisconfig.Organization
for _, iorg := range conf.Application.Organizations {
if iorg.Name == asOrg {
org = iorg
}
}
anchorPeers := make([]*pb.AnchorPeer, len(org.AnchorPeers))
for i, anchorPeer := range org.AnchorPeers {
anchorPeers[i] = &pb.AnchorPeer{
Host: anchorPeer.Host,
Port: int32(anchorPeer.Port),
}
}
configGroup := config.TemplateAnchorPeers(org.Name, anchorPeers)
configGroup.Groups[config.ApplicationGroupKey].Groups[org.Name].Values[config.AnchorPeersKey].ModPolicy = mspconfig.AdminsPolicyKey
configUpdate := &cb.ConfigUpdate{
ChannelId: channelID,
WriteSet: configGroup,
ReadSet: cb.NewConfigGroup(),
}
configUpdate.ReadSet.Groups[config.ApplicationGroupKey] = cb.NewConfigGroup()
configUpdate.ReadSet.Groups[config.ApplicationGroupKey].Version = 1
configUpdate.ReadSet.Groups[config.ApplicationGroupKey].ModPolicy = mspconfig.AdminsPolicyKey
configUpdate.ReadSet.Groups[config.ApplicationGroupKey].Groups[org.Name] = cb.NewConfigGroup()
configUpdate.ReadSet.Groups[config.ApplicationGroupKey].Groups[org.Name].Values[config.MSPKey] = &cb.ConfigValue{}
configUpdate.ReadSet.Groups[config.ApplicationGroupKey].Groups[org.Name].Policies[mspconfig.ReadersPolicyKey] = &cb.ConfigPolicy{}
configUpdate.ReadSet.Groups[config.ApplicationGroupKey].Groups[org.Name].Policies[mspconfig.WritersPolicyKey] = &cb.ConfigPolicy{}
configUpdate.ReadSet.Groups[config.ApplicationGroupKey].Groups[org.Name].Policies[mspconfig.AdminsPolicyKey] = &cb.ConfigPolicy{}
configUpdate.WriteSet.Groups[config.ApplicationGroupKey].Version = 1
configUpdate.WriteSet.Groups[config.ApplicationGroupKey].ModPolicy = mspconfig.AdminsPolicyKey
configUpdate.WriteSet.Groups[config.ApplicationGroupKey].Groups[org.Name].Version = 1
configUpdate.WriteSet.Groups[config.ApplicationGroupKey].Groups[org.Name].ModPolicy = mspconfig.AdminsPolicyKey
configUpdate.WriteSet.Groups[config.ApplicationGroupKey].Groups[org.Name].Values[config.MSPKey] = &cb.ConfigValue{}
configUpdate.WriteSet.Groups[config.ApplicationGroupKey].Groups[org.Name].Policies[mspconfig.ReadersPolicyKey] = &cb.ConfigPolicy{}
configUpdate.WriteSet.Groups[config.ApplicationGroupKey].Groups[org.Name].Policies[mspconfig.WritersPolicyKey] = &cb.ConfigPolicy{}
configUpdate.WriteSet.Groups[config.ApplicationGroupKey].Groups[org.Name].Policies[mspconfig.AdminsPolicyKey] = &cb.ConfigPolicy{}
configUpdateEnvelope := &cb.ConfigUpdateEnvelope{
ConfigUpdate: utils.MarshalOrPanic(configUpdate),
}
update := &cb.Envelope{
Payload: utils.MarshalOrPanic(&cb.Payload{
Header: &cb.Header{
ChannelHeader: utils.MarshalOrPanic(&cb.ChannelHeader{
ChannelId: channelID,
Type: int32(cb.HeaderType_CONFIG_UPDATE),
}),
},
Data: utils.MarshalOrPanic(configUpdateEnvelope),
}),
}
err := ioutil.WriteFile(outputAnchorPeersUpdate, utils.MarshalOrPanic(update), 0644)
return nil
}
//代码在common/configtx/tool/configtxgen/main.go欢迎继续关注兄弟连区块链教程分享!