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