## 1. 釋義 獲取指定通道上的區塊鏈信息。需要`-c`標志。 ## 2. 使用方法 ``` ~$ peer channel getinfo [flags] ``` ## 3. 命令標志 ``` -c, --channelID string In case of a newChain command, the channel ID to create. It must be all lower case, less than 250 characters long and match the regular expression: [a-z][a-z0-9.-]* -h, --help help for getinfo ``` 全局標志： ``` --cafile string Path to file containing PEM-encoded trusted certificate(s) for the ordering endpoint --certfile string Path to file containing PEM-encoded X509 public key to use for mutual TLS communication with the orderer endpoint --clientauth Use mutual TLS when communicating with the orderer endpoint --connTimeout duration Timeout for client to connect (default 3s) --keyfile string Path to file containing PEM-encoded private key to use for mutual TLS communication with the orderer endpoint -o, --orderer string Ordering service endpoint --ordererTLSHostnameOverride string The hostname override to use when validating the TLS connection to the orderer. --tls Use TLS when communicating with the orderer endpoint ``` ## 4. 示例代碼 下面的示例獲取通道mychannel的信息： ``` ~$ peer channel getinfo -c mychannel 2018-02-25 15:15:44.135 UTC [channelCmd] InitCmdFactory -> INFO 003 Endorser and orderer connections initialized Blockchain info: {"height":5,"currentBlockHash":"JgK9lcaPUNmFb5Mp1qe1SVMsx3o/22Ct4+n5tejcXCw=","previousBlockHash":"f8lZXoAn3gF86zrFq7L1DzW2aKuabH9Ow6SIE5Y04a4="} 2018-02-25 15:15:44.139 UTC [main] main -> INFO 006 Exiting..... ``` 可以看到通道mychannel的最新區塊序號為5，以及最新區塊的密碼學哈希值等信息。