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SET_FORWARDER_ADDRESS.md

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✅ Set Chainlink Forwarder Address on Contract

🔗 Base Mainnet Forwarder Address

KeystoneForwarder Address (Base): 0xF8344CFd5c43616a4366C34E3EEE75af79a74482

This is the address that CRE workflows use to deliver reports to your contract. Your contract's onReport() function should only accept calls from this address.

⚙️ Set Forwarder Address on Contract

Your contract already has the setChainlinkOracle() function. Set the forwarder address:

cast send 0x2E48c2aae9CC1dF9Ca4e5Cd67be17f299B86eB4f \
  "setChainlinkOracle(address)" 0xF8344CFd5c43616a4366C34E3EEE75af79a74482 \
  --rpc-url base_mainnet \
  --private-key $PRIVATE_KEY

✅ Verify Forwarder is Set

After setting, verify it's configured correctly:

cast call 0x2E48c2aae9CC1dF9Ca4e5Cd67be17f299B86eB4f \
  "chainlinkOracle()" \
  --rpc-url base_mainnet

Expected Output: 0x000000000000000000000000F8344CFd5c43616a4366C34E3EEE75af79a74482

🔒 Security

Your contract's onReport() function already includes this security check:

function onReport(
    bytes calldata /* metadata */,
    bytes calldata report
) external {
    // Security: Verify caller is the Chainlink forwarder
    if (msg.sender != chainlinkOracle) {
        revert TriviaBattle__Unauthorized();
    }
    // ... rest of function
}

Once you set chainlinkOracle to 0xF8344CFd5c43616a4366C34E3EEE75af79a74482, only the CRE KeystoneForwarder will be able to call onReport(), which provides the first layer of security.

📋 Forwarder Addresses (Reference)

Here are forwarder addresses for all supported networks:

  • Base: 0xF8344CFd5c43616a4366C34E3EEE75af79a74482 ✅ (Your network)
  • Arbitrum One: 0xF8344CFd5c43616a4366C34E3EEE75af79a74482
  • Avalanche: 0x76c9cf548b4179F8901cda1f8623568b58215E62
  • BNB Smart Chain: 0x76c9cf548b4179F8901cda1f8623568b58215E62
  • Ethereum Mainnet: 0x0b93082D9b3C7C97fAcd250082899BAcf3af3885
  • OP Mainnet: 0xF8344CFd5c43616a4366C34E3EEE75af79a74482
  • Polygon: 0x76c9cf548b4179F8901cda1f8623568b58215E62

✅ After Setting Forwarder

Once the forwarder is set:

  1. ✅ Your CRE workflow can successfully call distributePrizes() via onReport()
  2. ✅ The contract will reject any unauthorized calls to onReport()
  3. ✅ Automated prize distribution will work on the next scheduled run (Sunday 00:00 UTC)

🎯 Complete Setup Status

  • Contract deployed to Base Mainnet
  • Contract has onReport() function
  • CRE workflow deployed and active
  • Set forwarder address on contract ⚠️ ACTION REQUIRED
  • Start first session to test

Next Step: Run the cast send command above to set the forwarder address! 🚀