# Ethereum Mainnet Contract Verification - Final Status

**Date**: $(date)  
**Contract**: CCIPWETH9Bridge (`0x89dd12025bfCD38A168455A44B400e913ED33BE2`)  
**Status**: ⚠️ **BYTECODE MISMATCH - TROUBLESHOOTING**

---

## 🔍 Current Situation

### Verification Attempts

1. **First Attempt**: Compiler version mismatch (0.8.19 vs 0.8.20)
   - ✅ **Fixed**: Updated instructions to select 0.8.20

2. **Second Attempt**: Invalid "compiler" field in Standard JSON
   - ✅ **Fixed**: Removed invalid field

3. **Current Issue**: Bytecode mismatch
   - ⚠️ **Status**: Standard JSON compiles but bytecode doesn't match deployed contract
   - **Error**: "Unable to find matching Contract Bytecode and ABI"

---

## ✅ Files Ready

### Standard JSON Files

1. **Original**: `docs/CCIPWETH9Bridge_standard_json.json`
   - Fixed (invalid "compiler" field removed)
   - Ready for use

2. **Generated**: `docs/CCIPWETH9Bridge_standard_json_generated.json`
   - Generated from flattened source
   - Valid JSON
   - Same content as original (from flattened source)

### Source Files

- **Flattened**: `docs/CCIPWETH9Bridge_flattened.sol` (396 lines)
- **Original**: `/home/intlc/projects/smom-dbis-138/contracts/ccip/CCIPWETH9Bridge.sol`

---

## 🎯 Next Steps for Verification

### Option 1: Try Generated Standard JSON

Use the newly generated Standard JSON file:

1. **Go to Etherscan**:
   https://etherscan.io/address/0x89dd12025bfcd38a168455a44b400e913ed33be2#code

2. **Click "Contract" tab → "Verify and Publish"**

3. **Select "Standard JSON Input"**

4. **Upload**: `docs/CCIPWETH9Bridge_standard_json_generated.json`

5. **Select Compiler Version**: `v0.8.20+commit.a1b79de6`

6. **Enable "Via IR"**: Yes

7. **Optimization**: Yes (200 runs)

8. **Enter Constructor Arguments**:
   ```
   0x00000000000000000000000080226fc0ee2b096224eeac085bb9a8cba1146f7d000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2000000000000000000000000514910771af9ca656af840dff83e8264ecf986ca
   ```

9. **Submit**

### Option 2: Verify Source Code Matches

The bytecode mismatch suggests the source code might not exactly match what was deployed. Check:

1. **Compare deployed bytecode** with what the Standard JSON compiles to
2. **Verify source code** hasn't changed since deployment
3. **Check deployment transaction** for exact compiler settings

### Option 3: Use Sourcify (Alternative)

Sourcify is an alternative verification service:

1. Go to: https://sourcify.dev/
2. Upload contract metadata
3. Submit for verification

---

## 🔧 Troubleshooting Bytecode Mismatch

### Possible Causes

1. **Source Code Changed**: Contract source modified after deployment
2. **Compiler Settings**: Subtle difference in compiler settings
3. **Import Resolution**: Different import resolution during deployment
4. **Metadata**: Metadata differences affecting bytecode

### Diagnostic Commands

```bash
# Get deployed bytecode
cast code 0x89dd12025bfCD38A168455A44B400e913ED33BE2 --rpc-url $ETHEREUM_MAINNET_RPC > deployed.bytecode

# Compare with compiled bytecode from Standard JSON
# (Would need to compile Standard JSON locally and compare)
```

---

## 📋 Verification Checklist

- [x] Standard JSON file prepared
- [x] Invalid fields removed
- [x] Compiler version documented (0.8.20)
- [x] Constructor arguments encoded
- [x] Generated Standard JSON from source
- [ ] **Try verification with generated Standard JSON** ← **NEXT STEP**
- [ ] If still fails, investigate bytecode differences
- [ ] Consider Sourcify as alternative

---

## 📚 Available Resources

### Scripts
- `scripts/generate-standard-json-from-source.sh` - Generate Standard JSON
- `scripts/verify-manual-instructions.sh` - Manual verification guide

### Documentation
- `docs/ETHERSCAN_VERIFICATION_BYTECODE_MISMATCH_FIX.md` - Bytecode mismatch troubleshooting
- `docs/ETHERSCAN_VERIFICATION_FIX_COMPILER_VERSION.md` - Compiler version fix
- `docs/ETHEREUM_MAINNET_VERIFICATION_AUTOMATION.md` - Automation guide

### Files
- `docs/CCIPWETH9Bridge_standard_json.json` - Original (fixed)
- `docs/CCIPWETH9Bridge_standard_json_generated.json` - Generated from source
- `docs/CCIPWETH9Bridge_flattened.sol` - Flattened source

---

## 💡 Recommendations

1. **Try Generated Standard JSON First**: Use the newly generated file
2. **Verify Exact Settings**: Ensure all compiler settings match deployment exactly
3. **Check Deployment Transaction**: Review the actual deployment transaction for clues
4. **Consider Manual Verification**: Sometimes manual verification via UI works when automated fails
5. **Alternative Services**: Try Sourcify if Etherscan continues to fail

---

**Status**: ⚠️ **READY FOR VERIFICATION WITH GENERATED STANDARD JSON**  
**Priority**: Try verification with `CCIPWETH9Bridge_standard_json_generated.json`  
**Last Updated**: $(date)

