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.gofpackage mainimport ( “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 messagefunc (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-botgo 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