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Setup & accounts

Vigil-Keeper Testnet Stake

Procedure for staking the keeper EOA on Arbitrum Sepolia so the vigil-keeper service can execute liquidations.

Prerequisites

  • cast CLI (from Foundry)
  • Access to Doppler atrium-staging config
  • Arbitrum Sepolia faucet ETH

Steps

1. Generate keeper EOA

cast wallet new
# Save the address and private key securely
# This MUST be separate from the deployer EOA

2. Fund with testnet ETH

Send 0.02 testnet ETH to the keeper address from the Arbitrum Sepolia faucet or an existing funded wallet:

cast send --rpc-url https://arbitrum-sepolia.publicnode.com \
  --private-key $FUNDER_KEY \
  $KEEPER_ADDRESS \
  --value 0.02ether

3. Stake via Vigil contract

The Vigil contract (compiled with --features testnet-stake) accepts a minimum stake of 0.01 ETH.

# Using native ETH stake
cast send --rpc-url https://arbitrum-sepolia.publicnode.com \
  --private-key $KEEPER_PRIVATE_KEY \
  $VIGIL_ADDRESS \
  "stakeKeeper()" \
  --value 0.01ether

If stakeViaUSDC is implemented, wrap to WETH first or use USDC directly.

4. Verify stake

cast call --rpc-url https://arbitrum-sepolia.publicnode.com \
  $VIGIL_ADDRESS \
  "activeKeeperCount()(uint256)"
# Should return > 0

5. Update Doppler config

doppler secrets set KEEPER_PRIVATE_KEY=$KEEPER_PRIVATE_KEY \
  --project atrium --config staging --group vigil-keeper

Security Notes

  • The keeper EOA holds only the minimum stake + gas. Worst case: leak compromises only stake funds.
  • Rotate by generating a new EOA, staking, updating Doppler, then unstaking the old one.
  • Never reuse the deployer EOA as the keeper, deployer controls upgrades and multisig proposals.
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