docs(README): Remove PyQt5 references, remove configurations section, add onchain invalidation transaction detail

README.md

@@ -70,7 +70,7 @@ bal-electrum-plugin/
 │   ├── bal.py                    # Main plugin logic and core functionality
 │   ├── bal_resources.py          # Resource management and asset handling
 │   ├── heirs.py                  # Heir management logic and validation
-│   ├── qt.py                     # Main Qt interface and GUI components (PyQt6)
+│   ├── qt.py                     # Main Qt interface and GUI components
 │   ├── util.py                   # General utility functions
 │   ├── wallet_util/
 │   │   ├── bal_wallet_utils.py   # ⚠️ Advanced wallet utilities for emergency fixes
@@ -141,7 +141,6 @@ bal-electrum-plugin/
   - `bal_wallet_utils_qt.py`: Qt-specific wallet utilities
 
 ### Main Interface (qt.py)
-- **PyQt6 only**: Uses PyQt6 (not PyQt5)
 - **User-friendly wizards**: Step-by-step setup interface
 - **Real-time validation**: Immediate feedback on inputs
 - **Transaction preview**: Review before finalizing
@@ -198,6 +197,7 @@ Executor: "Bob Executor" (fee: 0.005 BTC fixed)
 
 **Logic**:
 - If today > 2025-12-31 → Old will is invalid
+- If old will is invalid, a non-timelocked transaction is sent onchain to invalidate the old will
 - Transaction executes on 2026-06-01
 - Bob receives 0.005 BTC only when transaction confirms
 - Bob is incentivized to broadcast at correct time
@@ -221,47 +221,11 @@ Executor: "Charlie Executor" (fee: 0.02 BTC fixed)
 
 ---
 
-## 🔧 Configuration
-
-### Plugin Settings
-
-After installation, configure in Electrum:
-
-1. Go to **Tools → Bal Electrum Plugin → Settings**
-2. Configure:
-   - **Default Locktime**: Set default locktime format (e.g., "365d")
-   - **CheckAlive Mode**: Choose "interval" or "fixed_date"
-   - **CheckAlive Value**: Set interval (e.g., "180d") or timestamp
-   - **Executor Fee**: Set fixed BTC amount (e.g., 0.01)
-   - **Debug Mode**: Enable for troubleshooting
-
-### Configuration File Location
-
-```
-~/.electrum/plugins/bal_electrum_plugin/config.json
-```
-
-### Example Configuration
-
-```json
-{
-  "locktime_format": "interval",
-  "default_locktime": "365d",
-  "checkalive_mode": "interval",
-  "checkalive_value": "180d",
-  "executor_fee": 0.01,
-  "debug": false
-}
-```
-
----
-
 ## 🛠️ Development
 
 ### Prerequisites
-- **Electrum Bitcoin wallet**: Version **4.7.2 or later** (not 4.0.0)
+- **Electrum Bitcoin wallet**: Version **4.7.2 or later**
 - **Python**: 3.7+
-- **PyQt6**: Only PyQt6 is supported (not PyQt5)
 
 ### Setup Development Environment
 
@@ -305,9 +269,7 @@ zip -r bal-electrum-plugin-dev.zip bal_electrum_plugin/
 
 ### Running the Plugin
 
-The plugin uses Electrum's existing virtualenv. No additional dependencies needed beyond:
+The plugin uses Electrum's existing virtualenv. No additional dependencies needed.
-- Electrum 4.7.2+
-- PyQt6
 
 ---
 
@@ -316,17 +278,12 @@ The plugin uses Electrum's existing virtualenv. No additional dependencies neede
 ### Common Issues
 
 #### Plugin Not Showing in Electrum
-- ✅ Verify Electrum version is **4.7.2 or later** (not 4.0.0)
+- ✅ Verify Electrum version is **4.7.2 or later**
 - ✅ Check zip contains `bal_electrum_plugin/` directory at root
 - ✅ Verify directory structure inside zip is correct
 - ✅ Restart Electrum completely after installation
 - ✅ Check Electrum logs: Help → Debug → Console
 
-#### PyQt6 Compatibility Issues
-- ✅ Ensure you're using PyQt6, not PyQt5
-- ✅ Verify Electrum 4.7.2+ uses PyQt6
-- ✅ Check import statements in plugin code
-
 #### Locktime Format Errors
 - ✅ Use valid formats: `180d`, `1y`, or Unix timestamp (e.g., `1735689600`)
 - ✅ Ensure locktime is in the future (after current time)
@@ -338,6 +295,7 @@ The plugin uses Electrum's existing virtualenv. No additional dependencies neede
 - ✅ Ensure CheckAlive value is before Locktime value
 - ✅ For interval mode: Check logic `locktime - interval > now`
 - ✅ For fixed date: Verify timestamp is in the future
+- ✅ If CheckAlive expires, old will is invalidated by sending a non-timelocked transaction onchain
 
 #### Heir Distribution Errors
 - ✅ Verify percentages sum to exactly 100%
@@ -396,7 +354,7 @@ git checkout -b feature/your-feature-name
 # Make changes to bal_electrum_plugin/ files
 # ...
 
-# Test in Electrum 4.7.2+ with PyQt6
+# Test in Electrum 4.7.2+
 
 # Commit changes with clear message
 git add .
@@ -431,4 +389,4 @@ MIT License - see [LICENSE](LICENSE) for details.
 
 **💡 Note**: The executor fee is a fixed BTC amount included in the transaction output. The executor is financially incentivized to broadcast the transaction and ensure it confirms on the Bitcoin network.
 
-**📋 Requirements**: Electrum 4.7.2+ with PyQt6 only. No pytest or additional dependencies needed.
+**📋 Requirements**: Electrum 4.7.2+ only. No additional dependencies or configuration sections needed.