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pubsub.go
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pubsub.go
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package pubsub
import (
"encoding/hex"
"fmt"
"os"
. "github.com/nknorg/nkn/api/common"
"github.com/nknorg/nkn/api/httpjson/client"
. "github.com/nknorg/nkn/cli/common"
. "github.com/nknorg/nkn/common"
"github.com/nknorg/nkn/util/config"
"github.com/nknorg/nkn/vault"
"github.com/urfave/cli"
)
func subscribeAction(c *cli.Context) error {
if c.NumFlags() == 0 {
cli.ShowSubcommandHelp(c)
return nil
}
walletName := c.String("wallet")
passwd := c.String("password")
myWallet, err := vault.OpenWallet(walletName, GetPassword(passwd))
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
var txnFee Fixed64
fee := c.String("fee")
if fee == "" {
txnFee = Fixed64(0)
} else {
txnFee, _ = StringToFixed64(fee)
}
nonce := c.Uint64("nonce")
var resp []byte
switch {
case c.Bool("sub"):
id := c.String("identifier")
if id == "" {
fmt.Println("identifier is required with [--id]")
return nil
}
topic := c.String("topic")
if topic == "" {
fmt.Println("topic is required with [--topic]")
return nil
}
duration := c.Uint64("duration")
meta := c.String("meta")
if meta == "" {
fmt.Println("meta is required with [--meta]")
return nil
}
txn, _ := MakeSubscribeTransaction(myWallet, id, topic, uint32(duration), meta, nonce, txnFee)
buff, _ := txn.Marshal()
resp, err = client.Call(Address(), "sendrawtransaction", 0, map[string]interface{}{"tx": hex.EncodeToString(buff)})
case c.Bool("unsub"):
id := c.String("identifier")
if id == "" {
fmt.Println("identifier is required with [--id]")
return nil
}
topic := c.String("topic")
if topic == "" {
fmt.Println("topic is required with [--topic]")
return nil
}
txn, _ := MakeUnsubscribeTransaction(myWallet, id, topic, nonce, txnFee)
buff, _ := txn.Marshal()
resp, err = client.Call(Address(), "sendrawtransaction", 0, map[string]interface{}{"tx": hex.EncodeToString(buff)})
case c.Bool("get"):
topic := c.String("topic")
if topic == "" {
fmt.Println("topic is required with [--topic]")
return nil
}
params := map[string]interface{}{"topic": topic}
subscriber := c.String("subscriber")
if subscriber == "" { // get list of topic
params["offset"] = c.Uint64("offset")
params["limit"] = c.Uint64("limit")
resp, err = client.Call(Address(), "getsubscribers", 0, params)
} else { // get details of specified subscriber
params["subscriber"] = subscriber
resp, err = client.Call(Address(), "getsubscription", 0, params)
}
default:
cli.ShowSubcommandHelp(c)
return nil
}
if err != nil {
fmt.Fprintln(os.Stderr, err)
return err
}
FormatOutput(resp)
return nil
}
func NewCommand() *cli.Command {
return &cli.Command{
Name: "pubsub",
Usage: "manage topic subscriptions",
Description: "With nknc pubsub, you could manage topic subscriptions.",
ArgsUsage: "[args]",
Flags: []cli.Flag{
cli.BoolFlag{
Name: "sub, s",
Usage: "subscribe to topic",
},
cli.BoolFlag{
Name: "unsub, u",
Usage: "unsubscribe from topic",
},
cli.BoolFlag{
Name: "get, g",
Usage: "get subscribes list of specified topic or get details info of a specified subscriber",
},
cli.StringFlag{
Name: "identifier, id",
Usage: "identifier",
},
cli.StringFlag{
Name: "topic",
Usage: "topic",
},
cli.Uint64Flag{
Name: "duration",
Usage: "duration",
},
cli.Uint64Flag{
Name: "offset",
Usage: "get subscribes skip previous offset items",
},
cli.Uint64Flag{
Name: "limit",
Usage: "limit subscribes amount which start from offset",
},
cli.StringFlag{
Name: "subscriber",
Usage: "specified subscriber which you want details",
},
cli.StringFlag{
Name: "meta",
Usage: "meta",
},
cli.StringFlag{
Name: "wallet, w",
Usage: "wallet name",
Value: config.Parameters.WalletFile,
},
cli.StringFlag{
Name: "password, p",
Usage: "wallet password",
},
cli.StringFlag{
Name: "fee, f",
Usage: "transaction fee",
Value: "",
},
cli.Uint64Flag{
Name: "nonce",
Usage: "nonce",
},
},
Action: subscribeAction,
OnUsageError: func(c *cli.Context, err error, isSubcommand bool) error {
PrintError(c, err, "pubsub")
return cli.NewExitError("", 1)
},
}
}