func (dt *DefaultTemplator) NewChannelConfig(envConfigUpdate *cb.Envelope) (channelconfig.Resources, error) {
	
  ... // 解包
	
  // 检查 Application 组配置项的 Version
	if uv := configUpdate.WriteSet.Groups[channelconfig.ApplicationGroupKey].Version; uv != 1 {
		return nil, fmt.Errorf("Config update for channel creation does not set application group version to 1, was %d", uv)
	}
  
	...
  // 从系统配置中取 ChannelCreationPolicy 给新的 applicationGroup 模版
	applicationGroup := cb.NewConfigGroup()
	consortiumsConfig, ok := dt.support.ConsortiumsConfig()
	if !ok {
		return nil, fmt.Errorf("The ordering system channel does not appear to support creating channels")
	}

	consortiumConf, ok := consortiumsConfig.Consortiums()[consortium.Name]
	if !ok {
		return nil, fmt.Errorf("Unknown consortium name: %s", consortium.Name)
	}

	applicationGroup.Policies[channelconfig.ChannelCreationPolicyKey] = &cb.ConfigPolicy{
		Policy: consortiumConf.ChannelCreationPolicy(),
	}
	applicationGroup.ModPolicy = channelconfig.ChannelCreationPolicyKey

	// Get the current system channel config
	systemChannelGroup := dt.support.ConfigtxValidator().ConfigProto().ChannelGroup

	// 如果 consortium group 没有组织成员, 允许 channel 创建中的 Application 中不包含组织成员
	// 如果 consortium group 中有任何组织成员, 那么 channel 创建中的 Applicaiton 组织成员至少要有其中一个
	if len(systemChannelGroup.Groups[channelconfig.ConsortiumsGroupKey].Groups[consortium.Name].Groups) > 0 &&
		len(configUpdate.WriteSet.Groups[channelconfig.ApplicationGroupKey].Groups) == 0 {
		return nil, fmt.Errorf("Proposed configuration has no application group members, but consortium contains members")
	}

  // 检查 channel 创建请求中的组织是否属于联盟组织成员
	if len(systemChannelGroup.Groups[channelconfig.ConsortiumsGroupKey].Groups[consortium.Name].Groups) > 0 {
		for orgName := range configUpdate.WriteSet.Groups[channelconfig.ApplicationGroupKey].Groups {
			consortiumGroup, ok := systemChannelGroup.Groups[channelconfig.ConsortiumsGroupKey].Groups[consortium.Name].Groups[orgName]
			if !ok {
				return nil, fmt.Errorf("Attempted to include a member which is not in the consortium")
			}
			applicationGroup.Groups[orgName] = proto.Clone(consortiumGroup).(*cb.ConfigGroup)
		}
	}

	channelGroup := cb.NewConfigGroup()

	... // 组装新的config
  
	return bundle, nil
}

applicationGroup.Policies[channelconfig.ChannelCreationPolicyKey] = &cb.ConfigPolicy{
		Policy: consortiumConf.ChannelCreationPolicy(),
	}
applicationGroup.ModPolicy = channelconfig.ChannelCreationPolicyKey

func NewConsortiumGroup(conf *genesisconfig.Consortium) (*cb.ConfigGroup, error) {
	consortiumGroup := cb.NewConfigGroup()

	for _, org := range conf.Organizations {
		var err error
		// Note, NewOrdererOrgGroup is correct here, as the structure is identical
		consortiumGroup.Groups[org.Name], err = NewOrdererOrgGroup(org)
		if err != nil {
			return nil, errors.Wrap(err, "failed to create consortium org")
		}
	}

	addValue(consortiumGroup, channelconfig.ChannelCreationPolicyValue(policies.ImplicitMetaAnyPolicy(channelconfig.AdminsPolicyKey).Value()), ordererAdminsPolicyName)

	consortiumGroup.ModPolicy = ordererAdminsPolicyName
	return consortiumGroup, nil
}