# 程式交易實作 - 利用EventBridge定期取得價格資訊並發送通知

## Previously on ...
* [20230427 - 初談自動化交易，透過AWS Lambda更新交易訊號](https://hackmd.io/@_ZfaCsoORM2ms6z9wV-aNw/SJdyS2RMh)

## Today's Goal:
* Create a polling event to periodically check the price.
* Upgrade the Discord bot for a serverless architecture.
* Set up a function for automatically sending messages to a Discord channel.

## Workshop First !!!

### Step1: Pull the latest code from Github

git remote set-url origin https://github.com/biomotion/aws-binance-bot.git
git pull origin main

### Step2: Set environment variables
In `serverless.yml` ...

  environment:
    DISCORD_BOT_TOKEN: #TODO
    PUBLIC_KEY: #TODO
    DISCORD_CHANNEL_ID: #TODO
    SCHEDULE_RULE_NAME: #TODO!

We have to set these variables above.
1. `DISCORD_BOT_TOKEN` and `PUBLIC_KEY`: [HERE](https://discord.com/developers/applications)
2. `DISCORD_CHANNEL_ID`: [How to Find a Discord Channel ID: The Ultimate Guide](https://turbofuture.com/internet/Discord-Channel-ID)
1. In your discord APP: Settings > Advanced > switch on Developer Mode
2. Navigate to the Channel
3. Right-click the channel name > Copy ID

### Step3: Deploy your code to AWS
1. Deploy

sls deploy


Copy the output endpoint. This will be used in the next step.

2. Change the environment variable of `SCHEDULE_RULE_NAME`
1. In your AWS console, find aws-binance-bot-dev-discord_bot
2. Configuration > Environment variables > Edit
3. Change `SCHEDULE_RULE_NAME`

### Step4: Set Interactions Endpoint URL for your bot
1. In your application page > General Information > fill in `INTERACTIONS ENDPOINT URL`
2. Save changes
3. Copy `APPLICATION ID` (for the next step)

### Step5: Register commands for discord bot
Replace `<YOUR_TOKEN>` and `<YOUR_APPLICATION_ID>`

export DISCORD_BOT_TOKEN=<YOUR_TOKEN>
export APPLICATION_ID=<YOUR_APPLICATION_ID>
     
curl -X POST \
     -H "Content-Type: application/json" \
     -H "Authorization: Bot $DISCORD_BOT_TOKEN" \
     -d '{
         "name": "start",
         "description": "Start trade bot"
     }' \
     "https://discord.com/api/v10/applications/$APPLICATION_ID/commands"
     
curl -X POST \
     -H "Content-Type: application/json" \
     -H "Authorization: Bot $DISCORD_BOT_TOKEN" \
     -d '{
         "name": "stop",
         "description": "Stop trade bot"
     }' \
     "https://discord.com/api/v10/applications/$APPLICATION_ID/commands"


### Step6: Complete!

## Outro.

>「程式交易，就是你把自己想的交易方法叫電腦去做。」 -- 市場先生

### Disclaimer

本教學僅介紹如何使用AWS Lambda架設自動化交易程式與通知系統。策略與作法僅供參考，投資風險自負。

### 未來方向
1. 驗證策略: 回測分析
2. 利用ccxt package進行下單 (https://github.com/ccxt/ccxt)
3. 倉位控制

## Reference
- https://aws.amazon.com/tw/eventbridge/
- https://discord.com/developers/docs/reference
- https://hackmd.io/@_ZfaCsoORM2ms6z9wV-aNw/SJdyS2RMh
- https://github.com/ker0olos/aws-lambda-discord-bot