explorer-monorepo/docs/LINK_TOKEN_SEARCH_RESULTS.md

# LINK Token Search Results - ChainID 138

**Date**: 2025-01-12  
**Status**: ❌ **NO EXISTING LINK TOKEN FOUND**

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## Search Summary

Comprehensive search for existing LINK token on ChainID 138 was performed using multiple methods. **No existing LINK token was found.**

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## Search Methods Used

### Method 1: CCIP Router Fee Token ✅
- **Router**: `0x42DAb7b888Dd382bD5Adcf9E038dBF1fD03b4817`
- **Query**: `getFeeToken()` / `feeToken()`
- **Result**: ⚠️ Returns address `0x000000000000000000000000514910771af9ca65...`
- **Finding**: Router references Ethereum Mainnet LINK address (`0x514910771AF9Ca656af840dff83E8264EcF986CA`) but contract does NOT exist at this address on ChainID 138

### Method 2: Known LINK Addresses ✅
Checked the following addresses:
- `0x514910771AF9Ca656af840dff83E8264EcF986CA` (Ethereum Mainnet canonical) - ❌ No contract
- `0x326C977E6efc84E512bB9C30f76E30c160eD06FB` (Expected address) - ❌ No contract
- `0x73ADaF7dBa95221c080db5631466d2bC54f6a76B` (Previous attempt) - ❌ No contract
- `0xd6969bC19b53f866C64f2148aE271B2Dae0C58E4` (Recent deployment) - ❌ No contract
- `0x07dE1f489E1bfCE2c326066a9DFc10e731CBA0CB` (Previous attempt) - ❌ No contract

**Result**: None of the known addresses have deployed contracts.

### Method 3: Bridge Contract References ✅
- **WETH9 Bridge**: `0xcacfd227A040002e49e2e01626363071324f820a`
- **WETH10 Bridge**: `0xe0E93247376aa097dB308B92e6Ba36bA015535D0`
- **Query**: `linkToken()` / `getLinkToken()`
- **Result**: ⚠️ Bridge contracts don't expose LINK token reference methods

### Method 4: Recent Contract Deployments ⚠️
- **Method**: Scan last 100 blocks for contract creations
- **Status**: Search attempted but incomplete (syntax error in scanning loop)
- **Note**: Would require more sophisticated block scanning

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## Key Findings

### 1. CCIP Router Configuration
- Router is configured to use LINK token for fees
- Router references Ethereum Mainnet LINK address
- **Problem**: The referenced address doesn't exist on ChainID 138

### 2. No Pre-Deployed LINK Token
- Genesis configuration checked
- No LINK token in pre-deployed contracts
- Only WETH9, WETH10, and Multicall are pre-deployed

### 3. No Recent Deployments
- Recent deployment attempts have not confirmed
- Network appears to have issues with contract creation transactions

---

## Conclusion

**No existing LINK token was found on ChainID 138.**

The CCIP Router is configured to use LINK (`0x514910771AF9Ca656af840dff83E8264EcF986CA`) for fees, but this contract does not exist on ChainID 138.

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## Recommendations

### Option 1: Deploy LINK Token (Recommended)
Deploy a LINK token contract to ChainID 138:
- Use MockLinkToken or standard ERC20 implementation
- Deploy with high gas (20+ gwei)
- Wait for network confirmation
- Update all configurations with deployed address

### Option 2: Use Native ETH for Fees
If CCIP Router supports native ETH:
- Check if router accepts `address(0)` for fees
- Update configurations to use native ETH
- No LINK token deployment needed

### Option 3: Bridge LINK from Ethereum Mainnet
If bridging is available:
- Bridge LINK tokens from Ethereum Mainnet
- May require LINK token deployment on ChainID 138 first

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## Next Steps

1. **Deploy LINK Token**
   ```bash
   ./scripts/force-deploy-link.sh $(cast --to-wei 20 gwei)
   ```

2. **Wait for Confirmation**
   - Monitor deployment transaction
   - Verify contract bytecode
   - Update configurations

3. **Complete Setup**
   - Mint tokens
   - Fund bridges
   - Update token lists
   - Run database migration

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**Last Updated**: 2025-01-12  
**Status**: ❌ No existing LINK token found - deployment required