explorer-monorepo/docs/LINK_TOKEN_EXISTING_TOKEN_ANALYSIS.md

LINK Token - Existing Token Analysis

Date: 2025-01-12
Purpose: Analysis of Option 2 from LINK_TOKEN_DEPLOYMENT_FIX_REPORT.md

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Investigation Results

CCIP Router Fee Token Check

Router Address: 0x8078A09637e47Fa5Ed34F626046Ea2094a5CDE5e

Method: feeToken()

Result:

• ✅ Router method exists and returns address
• ⚠️ Returns padded address: 0x000000000000000000000000514910771af9ca656af840dff83e8264ecf986ca
• ✅ Extracted address: 0x514910771af9ca656af840dff83e8264ecf986ca

Standard LINK Address Verification

Address Checked: 0x514910771AF9Ca656af840dff83E8264EcF986CA

Result:

• ❌ Contract does NOT exist on ChainID 138
• Code length: 2 (empty)
• Router references this address, but contract is not deployed

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Conclusion

Finding

The CCIP Router references the standard LINK token address (0x514910771AF9Ca656af840dff83E8264EcF986CA), but the actual token contract is NOT deployed on ChainID 138.

This means:

1. ✅ Router is configured to use LINK for fees
2. ❌ LINK token contract does not exist on this chain
3. ✅ We must deploy a MockLinkToken to fulfill the requirement

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Solution

Since the standard LINK token doesn't exist on ChainID 138, we have two options:

Option A: Deploy MockLinkToken (Recommended)

Why:

• Standard LINK token not available
• MockLinkToken provides same interface
• Can be minted for testing

Implementation:

• Use scripts/diagnose-link-deployment.sh
• Or use scripts/force-deploy-link.sh
• Deploy MockLinkToken with mint function

Option B: Acquire Standard LINK (If Available)

Why:

• If LINK becomes available on ChainID 138
• Use standard token if deployed

Implementation:

• Check if LINK is deployed later
• Update .env with standard address
• Acquire LINK from exchange/faucet

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Current Status

✅ Completed

• Router fee token check implemented
• Standard LINK address verification
• Address extraction logic created
• Documentation updated

⏳ Pending

• MockLinkToken deployment (still not confirming)
• Network confirmation of deployment
• Bridge funding

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Next Steps

1. Continue deployment attempts with MockLinkToken
2. Monitor network for deployment confirmation
3. Alternative: Use Remix IDE for deployment
4. Once deployed: Mint tokens and fund bridges

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Files Updated

1. scripts/diagnose-link-deployment.sh

   • Checks router for fee token
   • Verifies standard LINK address
   • Attempts deployment if not found

2. docs/LINK_TOKEN_DEPLOYMENT_FIX_REPORT.md

   • Updated Option 2 with implementation status
   • Added notes about mint function availability

3. docs/LINK_TOKEN_EXISTING_TOKEN_ANALYSIS.md (this file)

   • Complete analysis of existing token check
   • Findings and recommendations

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Last Updated: 2025-01-12
Status: ✅ Analysis complete - MockLinkToken deployment required