## 1. 釋義 簽名并發送指定的通道configtx更新文件。需要`-f`、`-o`和`-c`標志。 ## 2. 使用方法 ``` ~$ peer channel update [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.-]* -f, --file string Configuration transaction file generated by a tool such as configtxgen for submitting to orderer -h, --help help for update ``` 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 下面的示例使用文件`./updatechannel.txn`中的配置交易更新通道mychannel， 使用位于orderer.example.com:7050的排序器向所有peer節點發送配置交易以便更新其 通道配置： ``` ~$ peer channel update -c mychannel -f ./updatechannel.txn -o orderer.example.com:7050 2018-02-23 06:32:11.569 UTC [channelCmd] InitCmdFactory -> INFO 003 Endorser and orderer connections initialized 2018-02-23 06:32:11.626 UTC [main] main -> INFO 010 Exiting..... ``` 執行到這一步時，通道mychannel已經成功更新了。