peer chaincode query

获取并显示链码函数调用的背书结果。该命令不会生成交易。

使用方法

~$ peer chaincode query [flags]

命令标志

  -C, --channelID string               The channel on which this command should be executed
      --connectionProfile string       Connection profile that provides the necessary connection information for the network. Note: currently only supported for providing peer connection information
  -c, --ctor string                    Constructor message for the chaincode in JSON format (default "{}")
  -h, --help                           help for query
  -x, --hex                            If true, output the query value byte array in hexadecimal. Incompatible with --raw
  -n, --name string                    Name of the chaincode
      --peerAddresses stringArray      The addresses of the peers to connect to
  -r, --raw                            If true, output the query value as raw bytes, otherwise format as a printable string
      --tlsRootCertFiles stringArray   If TLS is enabled, the paths to the TLS root cert files of the peers to connect to. The order and number of certs specified should match the --peerAddresses flag

全局标志：

      --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
      --transient string                    Transient map of arguments in JSON encoding

示例代码

下面的示例使用peer chaincode query命令，通过版本为1.0的链码mycc查询节点账本的变量a的值：

~$ peer chaincode query -C mychannel -n mycc -c '{"Args":["query","a"]}'

2018-02-22 16:34:30.816 UTC [chaincodeCmd] checkChaincodeCmdParams -> INFO 001 Using default escc
2018-02-22 16:34:30.816 UTC [chaincodeCmd] checkChaincodeCmdParams -> INFO 002 Using default vscc
Query Result: 90

可以看到，在查询时变量a的值为90。