code: func (l *kvLedger) GetBlockchainInfo() (*common.BlockchainInfo, error) {
  	bcInfo, err := l.blockStore.GetBlockchainInfo()
  	l.blockAPIsRWLock.RLock()
  	defer l.blockAPIsRWLock.RUnlock()
  	return bcInfo, err
  }
docs: // GetBlockchainInfo returns basic info about blockchain