Feature/fetch users (#210)

* add fetch users

* Fix

cli/main.go

@@ -17,6 +17,7 @@ func main() {
 		Commands: []*cli.Command{
 			appMeCmdCli,
 			userCmdCli,
+			getUsersCmdCli,
 			transferCmdCli,
 			verifyPINCmdCli,
 			// batchTransferCmdCli,

cli/user.go

@@ -0,0 +1,54 @@
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"log"
+	"os"
+	"strings"
+
+	"github.com/MixinNetwork/bot-api-go-client/v3"
+	"github.com/urfave/cli/v2"
+)
+
+var getUsersCmdCli = &cli.Command{
+	Name:   "users",
+	Action: getUsersCmd,
+	Flags: []cli.Flag{
+		&cli.StringFlag{
+			Name:  "keystore,k",
+			Usage: "keystore download from https://developers.mixin.one/dashboard",
+		},
+		&cli.StringFlag{
+			Name:  "users",
+			Usage: "user ids",
+		},
+	},
+}
+
+func getUsersCmd(ctx *cli.Context) error {
+	keystore := ctx.String("keystore")
+	idStr := ctx.String("users")
+
+	log.Println(keystore, idStr)
+	dat, err := os.ReadFile(keystore)
+	if err != nil {
+		panic(err)
+	}
+	log.Println(string(dat))
+	var su bot.SafeUser
+	err = json.Unmarshal([]byte(dat), &su)
+	if err != nil {
+		panic(err)
+	}
+
+	ids := strings.Split(idStr, ",")
+	users, err := bot.GetUsers(context.Background(), ids, &su)
+	if err != nil {
+		panic(err)
+	}
+	for _, user := range users {
+		log.Printf("%#v", user)
+	}
+	return nil
+}

user.go

@@ -114,6 +114,31 @@ func GetUser(ctx context.Context, userId string, su *SafeUser) (*User, error) {
 	return resp.Data, nil
 }
 
+func GetUsers(ctx context.Context, userIds []string, su *SafeUser) ([]*User, error) {
+	url := "/users/fetch"
+	data, _ := json.Marshal(userIds)
+	token, err := SignAuthenticationToken("POST", url, string(data), su)
+	if err != nil {
+		return nil, err
+	}
+	body, err := Request(ctx, "POST", url, data, token)
+	if err != nil {
+		return nil, ServerError(ctx, err)
+	}
+	var resp struct {
+		Data  []*User `json:"data"`
+		Error Error   `json:"error"`
+	}
+	err = json.Unmarshal(body, &resp)
+	if err != nil {
+		return nil, BadDataError(ctx)
+	}
+	if resp.Error.Code > 0 {
+		return nil, resp.Error
+	}
+	return resp.Data, nil
+}
+
 func SearchUser(ctx context.Context, mixinId string, su *SafeUser) (*User, error) {
 	url := fmt.Sprintf("/search/%s", mixinId)
 	token, err := SignAuthenticationToken("GET", url, "", su)