GMGN First Token Sniper

About

Overview
This extension works only on gmgn.ai. It helps you identify “First / Not First” among tokens with the same name (by Symbol/Name rules), provides a one-click shortcut to open the First token, and includes an Auto Snipe (Auto Buy) feature. When multiple same-name tokens appear within a short period, it automatically selects the First one and attempts to buy it by clicking GMGN’s built-in buy button—reducing manual comparison and reaction time.


Core Feature (Focus): Auto Snipe / Auto Buy
1) Auto Snipe the First Token
- Monitoring scope: Only monitors the first column (New Created). This reduces noise and prevents cross-column false triggers.
- Trigger rule: Within a configurable time window (Y seconds), if at least X same-name tokens appear (based on your Match Mode), Auto Snipe is triggered.
- “First” selection logic: From the triggered same-name set, the extension selects the “First token” (the earliest-created / oldest one; typically the one with the largest age value, and if equal, the one earlier in the list by slot position rules).
- Execution method: It locates the First token row in the first column, triggers the hover state, and attempts to click GMGN’s internal Quick Buy / Buy button to place the order.
- Anti-duplicate protection:
  • The same token (chain:address) will only be auto-bought once  
  • The same-name group is marked as “triggered” after firing to avoid repeated buys
- Notifications & stats:
  • Shows a success notification after an auto-buy  
  • Tracks Detections / Auto Buys / Today’s Buys (batched writes to reduce overhead)

Important Notes (Read Before Enabling)
- This is NOT an on-chain trading bot. It only automates clicking GMGN’s website UI buy button.
- You must set your buy amount / QuickBuy parameters in GMGN first, otherwise the click may not result in a valid purchase.
- If GMGN changes page structure, button selectors, or introduces prompts/confirmations, Auto Buy may fail or require updates.


Other Features
2) First / Not First Auto Labeling
- Groups tokens by your same-name rules (Match Mode)
- Marks the oldest token within the group as “First”, and the rest as “Not First”
- Helps reduce confusion caused by mass-launched same-name tokens

3) One-Click “Open First” for Not-First Tokens
- A button is shown next to Not First items
- Click to open the corresponding First token page directly

4) Time Window Comparison
- Configure a comparison window (minutes)
- Only tokens within this age range are considered for “First” determination, reducing interference from very old same-name tokens

5) Bilingual UI
- English / 中文
- Optional “Auto” mode follows browser language


Auto Snipe Settings (Popup Options)
- Enable Auto Snipe: Turn Auto Buy on/off
- Time Window (sec): Trigger evaluation window (Y seconds)
- Min Duplicates: Minimum same-name token count to trigger (X tokens)
- Note: Only monitors the first column (New Created)


How to Use (Auto Buy Flow)
1. Install the extension and open: https://gmgn.ai/
2. Open the extension popup and enable “Enable Auto Snipe”
3. Set Y seconds (Time Window) and X (Min Duplicates)
4. Configure your default buy amount / QuickBuy settings on GMGN
5. When multiple same-name tokens appear quickly in the first column:
   - The extension detects the group
   - Selects the First token automatically
   - Attempts to click the Buy button to snipe it
   - Shows a notification and updates stats if successful


Permissions
- storage: Stores your settings and statistics (Detections, Auto Buys, Today’s Buys)
- Site access https://gmgn.ai/*: Runs only on gmgn.ai and does not affect other websites


Disclaimer
This is a third-party tool with no affiliation with gmgn.ai. Auto Buy involves risks including false triggers, failed orders, slippage, and breakage due to site UI changes. Enable Auto Snipe only if you understand and accept the risks.