Quick Start (most common)

• Collect inputs: chain (Base or remote), contract addresses, RPC URL, and the signer/admin address.
• Confirm current mode on the lottery manager:
  • Local VRF: useLocalVRF = true and localVRFConsumer != 0x0
  • Cross-chain VRF: useLocalVRF = false and vrfIntegrator != 0x0 and targetEid != 0
• Confirm the VRF hub is configured (Base):
  • vrfCoordinator != 0x0
  • subscriptionId > 0 and keyHash != 0x0
  • callbackGasLimit and requestConfirmations are sane
• If cross-chain, confirm the hub can respond:
  • VRF hub has ETH balance to pay LayerZero fees (otherwise it emits ResponsePending)
• Run a small verification (read-only) using cast call before making any state changes.

System Model (how randomness flows here)

• Hub (Base): contracts/services/lottery/vrf/CreatorVRFConsumerV2_5.sol
  • Receives remote requests via LayerZero (_lzReceive)
  • Requests randomness from Chainlink VRF Coordinator 2.5
  • Sends randomness back to the requesting chain via LayerZero
  • Can also serve local requests (requestRandomWordsLocal) and call back local receivers
• Spoke (remote chains): contracts/services/lottery/vrf/ChainlinkVRFIntegratorV2_5.sol
  • Forwards "request randomness" to the hub
  • Receives randomness from hub and calls back the local requester
• Lottery manager (per chain): contracts/services/lottery/CreatorLotteryManager.sol
  • Triggered by swap activity (continuous, not scheduled draws)
  • Requests local VRF (if enabled) or cross-chain VRF via the integrator
  • Processes win/loss immediately when randomness arrives

Required Inputs

• Chain/network: Base (hub) or which remote chain you are operating on
• RPC URL for that chain
• Contract addresses:
  • VRF hub (Base): CreatorVRFConsumerV2_5
  • Lottery manager on the chain: CreatorLotteryManager
  • VRF integrator on the chain (for cross-chain mode): ChainlinkVRFIntegratorV2_5
• VRF configuration (Base):
  • subscriptionId and keyHash
  • callbackGasLimit and requestConfirmations
• Admin identity:
  • EOA or multisig that is owner() on the contracts being changed

Never include private keys or full .env contents in output.

Repo Map (what to read / where truth lives)

• Deployment script (Base infra): script/DeployInfrastructure.s.sol (sets VRF coordinator on the hub)
• Hub contract: contracts/services/lottery/vrf/CreatorVRFConsumerV2_5.sol
• Spoke contract: contracts/services/lottery/vrf/ChainlinkVRFIntegratorV2_5.sol
• Lottery manager: contracts/services/lottery/CreatorLotteryManager.sol
• Example deployed hub metadata/ABI: deployments/base/contracts/services/lottery/vrf/CreatorVRFConsumerV2_5.json
• Historical run artifacts: broadcast/** and agent-logs/*.json
• Notes: docs/lottery/LOTTERY_INTEGRATION_FIX.md

Read-only Health Checks (preferred first)

Use these as templates (fill in $RPC_URL, $VRF_CONSUMER, $LOTTERY_MANAGER, $INTEGRATOR):

bash
1# Hub health (Base)
2cast call --rpc-url $RPC_URL $VRF_CONSUMER "owner()(address)"
3cast call --rpc-url $RPC_URL $VRF_CONSUMER "vrfCoordinator()(address)"
4cast call --rpc-url $RPC_URL $VRF_CONSUMER "subscriptionId()(uint256)"
5cast call --rpc-url $RPC_URL $VRF_CONSUMER "keyHash()(bytes32)"
6cast call --rpc-url $RPC_URL $VRF_CONSUMER "callbackGasLimit()(uint32)"
7cast call --rpc-url $RPC_URL $VRF_CONSUMER "requestConfirmations()(uint16)"
8cast call --rpc-url $RPC_URL $VRF_CONSUMER "getContractStatus()(uint256,uint256,bool,uint32,uint256)"
9
10# Lottery manager VRF mode
11cast call --rpc-url $RPC_URL $LOTTERY_MANAGER "useLocalVRF()(bool)"
12cast call --rpc-url $RPC_URL $LOTTERY_MANAGER "localVRFConsumer()(address)"
13cast call --rpc-url $RPC_URL $LOTTERY_MANAGER "vrfIntegrator()(address)"
14cast call --rpc-url $RPC_URL $LOTTERY_MANAGER "targetEid()(uint32)"

Configuration Workflows

A) Configure the VRF hub on Base (after deployment)

The deployment script sets the coordinator, but VRF still needs subscription/keyHash config.

Steps:

1. Confirm vrfCoordinator() is correct for Base and owner() is the expected admin.
2. Call setVRFConfig(subscriptionId, keyHash, callbackGasLimit, requestConfirmations) on the hub.
3. Ensure the Chainlink subscription has:
   • enough LINK/balance
   • the hub consumer address added as an authorized consumer (Chainlink UI/off-chain step)

B) Enable cross-chain VRF on a chain (lottery manager)

Cross-chain mode means the chain’s CreatorLotteryManager requests randomness via a local ChainlinkVRFIntegratorV2_5, which forwards to the Base hub.

Checklist:

• Integrator has the correct hubEid
• LayerZero peers are configured between spoke integrator and hub VRF consumer (both directions)
• The hub contract has enough ETH to pay LayerZero response fees (otherwise ResponsePending fires)
• Lottery manager is configured:
  • setVRFIntegrator(integrator) (also marks it trusted)
  • setTargetEid(<hubEid>)
  • setUseLocalVRF(false)

C) Enable local VRF mode on Base (lottery manager)

Local mode means the lottery manager calls CreatorVRFConsumerV2_5.requestRandomWords() directly, and receives the callback via receiveRandomWords(requestId, randomWords).

Checklist:

• Hub is configured with VRF coordinator + subscription + keyHash
• Hub authorizes the lottery manager as a local caller (authorizedLocalCallers)
• Lottery manager is configured:
  • setLocalVRFConsumer(<hub address>)
  • setUseLocalVRF(true)

Troubleshooting (common failures)

• Remote requests stuck / no callback:
  • Check hub emitted ResponsePending(sequence, requestId, targetChain, reason); if yes, fund the hub (it must pay LayerZero response fees).
  • Verify LayerZero peers: peers(eid) must match the expected remote sender (both hub and spoke).
  • Check supportedChains(srcEid) on the hub for that remote chain.
• Local requests revert Unauthorized:
  • The hub requires authorizedLocalCallers[msg.sender] = true for requestRandomWordsLocal().
  • Ensure the lottery manager (or your test caller) is authorized.
• Lottery entries return 0 / no entry created:
  • CreatorLotteryManager can return 0 if VRF is misconfigured (no integrator, not trusted, no targetEid, or local consumer unset).
  • Also check creator coin registration/active status and per-creator oracle freshness.

Output Format (when using this skill)

Return a structured result:

• Summary: what was wrong and what was changed (or confirmed healthy)
• Inputs: chain, RPC, contract addresses, key config values (no secrets)
• Checks performed: which read-only calls and what they returned
• Actions taken (if any): tx hashes and which functions were called
• Verification: events observed or post-state reads confirming the fix
• Follow-ups: anything still risky or needing off-chain action (e.g., Chainlink subscription consumer add)