Module CLI

Command-Line Interface For CosmosSDK Module
Loc:cosmos-sdk/x/stake/client/cli/tx.go
stake的cli源码解析
func GetCmdDelegate(cdc *wire.Codec) *cobra.Command {
    cmd := &cobra.Command{
        Use:   "delegate",
        Short: "delegate coins to an existing validator/candidate",
        RunE: func(cmd *cobra.Command, args []string) error {
...
上面是Go语言 cobra 包 构建命令的基本结构,它主要是解析delegate命令。
Use 代表子命令的名字
RunE 命令的主要逻辑
            amount, err := sdk.ParseCoin(viper.GetString(FlagAmount))
            if err != nil {
                return err
            }
​
            delegatorAddr, err := sdk.GetAddress(viper.GetString(FlagAddressDelegator))
            candidateAddr, err := sdk.GetAddress(viper.GetString(FlagAddressCandidate))
            if err != nil {
                return err
            }
​
            msg := stake.NewMsgDelegate(delegatorAddr, candidateAddr, amount)
​
            // build and sign the transaction, then broadcast to Tendermint
            ctx := context.NewCoreContextFromViper().WithDecoder(authcmd.GetAccountDecoder(cdc))
​
            res, err := ctx.EnsureSignBuildBroadcast(ctx.FromAddressName, msg, cdc)
            if err != nil {
                return err
            }
​
            fmt.Printf("Committed at block %d. Hash: %s\n", res.Height, res.Hash.String())
            return nil
        },
    }
​
    cmd.Flags().AddFlagSet(fsAmount)
    cmd.Flags().AddFlagSet(fsDelegator)
    cmd.Flags().AddFlagSet(fsCandidate)
    return cmd
viper.GetString从相应的Flag字段获取字段后面的参数，以字符串读入。
sdk.Parsecoin parses a cli input for one coin type
sdk.GetAddress create an Address from a string
stake.NewMsgDelegate 根据上面信息创建出msg
最后构建和签名交易，在tendermint层进行广播
AddFlagSet(fsAmount) 添加命令所需参数
const FlagAmount = "amount"
fsAmount   = flag.NewFlagSet("", flag.ContinueOnError)
fsAmount.String(FlagAmount, "1steak", "Amount of coins to bond")
fsAmount具体的构建流程
gaiacli 上面添加stake的cmd
// add query/post commands (custom to binary)
    rootCmd.AddCommand(
        client.GetCommands(
            ...
            stakecmd.GetCmdQueryCandidate("stake", cdc),
            stakecmd.GetCmdQueryCandidates("stake", cdc),
            stakecmd.GetCmdQueryDelegatorBond("stake", cdc),
        )...)
    rootCmd.AddCommand(
        client.PostCommands(
          ...
            stakecmd.GetCmdDeclareCandidacy(cdc),
            stakecmd.GetCmdEditCandidacy(cdc),
            stakecmd.GetCmdDelegate(cdc),
            stakecmd.GetCmdUnbond(cdc),
        )...)
GetCommands() 添加查询的命令
PostCommands() 添加带参数的命令 
Add My Module
Module Test
Last updated 3 years ago