⚠️ Implement Slippage Alert & Notification System

[mijinummi]

🧭 Overview

BridgeWise executes cross-chain transfers, and slippage can negatively impact users by:

• Increasing the effective cost
• Causing partial or failed transactions

This issue introduces a Slippage Alert & Notification System that:

• Monitors slippage thresholds in real-time
• Notifies users if slippage exceeds acceptable limits
• Integrates with <BridgeCompare />, <BridgeStatus />, and useBridgeQuotes()
• Provides developers with hooks and callbacks for custom handling

---

🎯 Problem

• Users may unknowingly initiate transfers with high slippage
• High slippage reduces user trust
• Developers currently cannot provide proactive warnings
• Lack of notifications leads to failed or suboptimal transactions

Without slippage alerts, BridgeWise risks poor UX and decreased adoption.

---

💡 Proposed Solution

Implement a system that:

• Tracks slippage for all active quotes and routes
• Compares slippage against configurable thresholds
• Provides user-facing notifications via UI components
• Exposes hook useSlippageAlert() for developer integration
• Supports automatic blocking of transfers exceeding maximum slippage (optional)

---

🛠 Scope of Work

1️⃣ Define Slippage Alert Configuration

interface SlippageAlertConfig {
  maxSlippagePercent: number; // default 1%
  notifyUser?: boolean; // display alert in UI
  onAlert?: (data: { bridge: string; slippage: number }) => void;
}

• Configurable per dApp
• Optional callback for custom notifications

---

2️⃣ Implement Slippage Monitoring

• Integrate with useBridgeQuotes() and real-time refresh (Issue Transaction Validation & Pre-Flight Checks #17)
• Track calculated slippage for each route
• Compare against configured thresholds
• Trigger alerts or callbacks when exceeded

---

3️⃣ Integrate With Components

• <BridgeCompare />:

  • Highlight routes with high slippage

• <BridgeStatus />:

  • Show slippage warning during execution

• Provide optional toast notifications or banners

---

4️⃣ Hook Implementation

• useSlippageAlert(config: SlippageAlertConfig):

  • Returns:

    • alerts array
    • dismissAlert() function

  • SSR-safe

  • Works with headless mode

---

5️⃣ Error Handling & Fallbacks

• Graceful handling if slippage data is unavailable
• Ensure alerts do not block UI
• Optional suppression of alerts for certain routes

---

📊 Expected Outcome

• Users are proactively warned of high slippage
• Reduced failed or unexpectedly expensive transfers
• Developers have control over alerting behavior
• Integration with existing UI and hooks is seamless

---

✅ Acceptance Criteria

• Slippage monitoring implemented for all active quotes
• Configurable alert thresholds supported
• useSlippageAlert() hook implemented
• Integration with <BridgeCompare /> and <BridgeStatus />
• Optional toast/banner notifications functional
• Alerts can be dismissed or programmatically managed
• SSR-safe implementation
• Unit tests for monitoring, alerts, and hooks
• Documentation updated with usage examples

---

📈 Measurable Impact

• Increased user trust in cross-chain transfers
• Reduced financial loss due to slippage
• Higher adoption among professional dApp teams
• Developers can provide proactive UX improvements

---

🧪 Testing Requirements

• Simulate routes with slippage above and below thresholds
• Verify alerts trigger correctly
• Test integration with UI components
• Validate hook behavior in headless mode
• Confirm SSR-safe operation
• Test dismiss and callback functionality

---

📚 Documentation Requirements

• Add “Slippage Alerts” section to README
• Provide usage example with hook:

const { alerts, dismissAlert } = useSlippageAlert({ maxSlippagePercent: 1 });

• Include examples in demo app
• Document integration with <BridgeCompare /> and <BridgeStatus />

---

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[ReinaMaze]

@ReinaMaze has applied to work on this issue as part of the Stellar Wave Program's 2nd wave.

Gm , can I please get assigned with this task

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[mftee]

@mftee has applied to work on this issue as part of the Stellar Wave Program's 2nd wave.

I am a fullstack software developer with multiple years experience in the industry. I can deliver on this issue in a few hours.

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Congratulations, @mftee! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on February 26, 2026.

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