基于 Mixin Network 的 Go 语言比特币开发教程 : 用 Mixin Messenger 机器人接受和发送比特币

在上一篇教程中, 我们创建了自动回复消息的机器人,当用户发送消息"Hello,World!"时，机器人会自动回复同一条消息!

按本篇教程后学习后完成后，你的机器人将会接受用户发送过来的加密货币，然后立即转回用户。完整代码如下：

main.go

fpackage main

import (
	"context"
	"encoding/base64"
	"encoding/json"
	"log"
	"github.com/MooooonStar/mixin-sdk-go/messenger"
	mixin "github.com/MooooonStar/mixin-sdk-go/network"
)

type Listener struct {
	*messenger.Messenger
}

// interface to implement if you want to handle the message
func (l *Listener) OnMessage(ctx context.Context, msg messenger.MessageView, userId string) error {
	data, err := base64.StdEncoding.DecodeString(msg.Data)
	if err != nil {
		return err
	}
	if msg.Category == "SYSTEM_ACCOUNT_SNAPSHOT" {
		var transfer messenger.TransferView
		if err := json.Unmarshal(data, &transfer); err != nil {
			return err
		}
		log.Println("I got a coin: ", transfer.Amount)
		mixin.Transfer(msg.UserId,transfer.Amount,transfer.AssetId,"",messenger.UuidNewV4().String(),
									PinCode,PinToken,UserId,SessionId,PrivateKey)
		return nil
		// return l.SendPlainText(ctx, msg.ConversationId, msg.UserId, string(data))
	} else if msg.Category == "PLAIN_TEXT" {
		log.Printf("I got a message, it said: %s", string(data))
		if string(data) == "g" {
			payLinkEOS := "https://mixin.one/pay?recipient=" +
							 msg.UserId  + "&asset=" +
							 "6cfe566e-4aad-470b-8c9a-2fd35b49c68d"   +
							 "&amount=" + "0.1" +
							 "&trace="  + messenger.UuidNewV4().String() +
							 "&memo="
		  payLinkBTC := "https://mixin.one/pay?recipient=" +
							 msg.UserId  + "&asset=" +
							 "c6d0c728-2624-429b-8e0d-d9d19b6592fa"   +
							 "&amount=" + "0.001" +
							 "&trace="  + messenger.UuidNewV4().String() +
							 "&memo="
		  log.Println(payLinkBTC)
			BtnEOS := messenger.Button{Label: "Pay EOS 0.1", Color: "#0080FF", Action: payLinkEOS}
			BtnBTC := messenger.Button{Label: "Pay BTC 0.0001", Color: "#00FF80", Action: payLinkBTC}
			if err := l.SendAppButtons(ctx, msg.ConversationId, msg.UserId, BtnEOS, BtnBTC); err != nil {
				return err
			}
			return nil
		} else if string(data) == "a"  {
			card := messenger.AppCard{Title: "Pay BTC 0.0001", Description: "topay", Action: "http://www.google.cn",
				IconUrl: "https://images.mixin.one/HvYGJsV5TGeZ-X9Ek3FEQohQZ3fE9LBEBGcOcn4c4BNHovP4fW4YB97Dg5LcXoQ1hUjMEgjbl1DPlKg1TW7kK6XP=s128"}
			if err := l.SendAppCard(ctx, msg.ConversationId, msg.UserId, card); err != nil {
				return err
			}
			return nil
		} else if string(data) == "r" {
			mixin.Transfer(msg.UserId,"0.0001","c6d0c728-2624-429b-8e0d-d9d19b6592fa","",messenger.UuidNewV4().String(),
										PinCode,PinToken,UserId,SessionId,PrivateKey)
			return nil
		} else { return l.SendPlainText(ctx, msg.ConversationId, msg.UserId, string(data)) }
	} else {
		log.Println("Unknown message!", msg.Category)
		return err
	}
}
const (
	UserId    = "21042518-85c7-4903-bb19-f311813d1f51"
	PinCode   = "911424"
	SessionId = "4267b63d-3daa-449e-bc13-970aa0357776"
	PinToken  = "gUUxpm3fPRVkKZNwA/gk10SHHDtR8LmxO+N6KbsZ/jymmwwVitUHKgLbk1NISdN8jBvsYJgF/5hbkxNnCJER5XAZ0Y35gsAxBOgcFN8otsV6F0FAm5TnWN8YYCqeFnXYJnqmI30IXJTAgMhliLj7iZsvyY/3htaHUUuN5pQ5F5s="
	//please delele the blank of PrivateKey the before each line
	PrivateKey = `-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----`
)


func main() {
	ctx := context.Background()
	m := messenger.NewMessenger(UserId, SessionId, PrivateKey)
	l := &Listener{m}
	go m.Run(ctx, l)
	select {}
}

你好, 比特币!

在项目目录下编译并执行

cd mixin_labs-go-bot
go build
./mixin_labs-go-bot

开发者可以通过消息面板，给机器人转比特币，当机器人收到比特币后，马上返还给用户！

事实上，用户可以发送任意的币种给机器人，它都能马上返还！

源代码解释

if msg.Category == "SYSTEM_ACCOUNT_SNAPSHOT" {
  var transfer messenger.TransferView
  if err := json.Unmarshal(data, &transfer); err != nil {
    return err
  }
  log.Println("I got a coin: ", transfer.Amount)
  mixin.Transfer(msg.UserId,transfer.Amount,transfer.AssetId,"",messenger.UuidNewV4().String(),
                PinCode,PinToken,UserId,SessionId,PrivateKey)
  return nil
  // return l.SendPlainText(ctx, msg.ConversationId, msg.UserId, string(data))
}

调用 SDK 的 mixin.Transfer 将币返还用户！

高级用法

APP_BUTTON_GROUP

在一些应用场景，比如：有一个交易所想提供换币服务，将比特币换成以太坊，EOS,比特币现金等, 你想显示给用户一组按钮，它们分别代表不同的币与不同的数量,APP_BUTTON_GROUP 可以帮你做到这一点.

payLinkEOS := "https://mixin.one/pay?recipient=" +
         msg.UserId  + "&asset=" +
         "6cfe566e-4aad-470b-8c9a-2fd35b49c68d"   +
         "&amount=" + "0.1" +
         "&trace="  + messenger.UuidNewV4().String() +
         "&memo="
payLinkBTC := "https://mixin.one/pay?recipient=" +
         msg.UserId  + "&asset=" +
         "c6d0c728-2624-429b-8e0d-d9d19b6592fa"   +
         "&amount=" + "0.001" +
         "&trace="  + messenger.UuidNewV4().String() +
         "&memo="
log.Println(payLinkBTC)
BtnEOS := messenger.Button{Label: "Pay EOS 0.1", Color: "#0080FF", Action: payLinkEOS}
BtnBTC := messenger.Button{Label: "Pay BTC 0.001", Color: "#00FF80", Action: payLinkBTC}
if err := l.SendAppButtons(ctx, msg.ConversationId, msg.UserId, BtnEOS, BtnBTC); err != nil {
  return err
}

这里演示给用户 BTC 与 EOS 两种，你还可以增加更多的按钮.

APP_CARD

如果你觉得一组按钮太单调了，可以试一下 APP_CARD,它提供一个图标的链接

card := messenger.AppCard{Title: "CNB", Description: "Chui Niu Bi", Action: "http://www.google.cn",
  IconUrl: "https://images.mixin.one/0sQY63dDMkWTURkJVjowWY6Le4ICjAFuu3ANVyZA4uI3UdkbuOT5fjJUT82ArNYmZvVcxDXyNjxoOv0TAYbQTNKS=s128"}
if err := l.SendAppCard(ctx, msg.ConversationId, msg.UserId, card); err != nil {
  return err
}

Full source code