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Setup & accounts

Loadtest EOA Runbook

Purpose

The loadtest service uses a dedicated testnet EOA that is separate from the deployer. This limits blast radius: if the key leaks, only loadtest funds are compromised.

Initial Setup

1. Generate EOA

cast wallet new
# Record address and private key

2. Fund with testnet assets

# ETH for gas (from faucet or existing wallet)
cast send --rpc-url https://arbitrum-sepolia.publicnode.com \
  --private-key $FUNDER_KEY \
  $LOADTEST_ADDRESS \
  --value 0.5ether

# Testnet USDC (mint from faucet contract if available)
cast send --rpc-url https://arbitrum-sepolia.publicnode.com \
  --private-key $FUNDER_KEY \
  $USDC_ADDRESS \
  "mint(address,uint256)" \
  $LOADTEST_ADDRESS \
  1000000000  # 1000 USDC (6 decimals)

3. Configure in Doppler

doppler secrets set LOADTEST_EOA_KEY=0x<private-key> \
  --project atrium --config staging --group loadtest

Rotation

  1. Generate new EOA: cast wallet new
  2. Fund new EOA with testnet ETH + USDC
  3. Update Doppler: doppler secrets set LOADTEST_EOA_KEY=0x<new-key>
  4. (Optional) Drain old EOA back to funder

Security Notes

  • NEVER use the deployer key (DEPLOYER_PRIVATE_KEY) for load testing
  • The loadtest wallet.ts will refuse to start if LOADTEST_EOA_KEY equals DEPLOYER_PRIVATE_KEY
  • Keep loadtest funds minimal, just enough for a test run
  • Rotate after any suspected exposure
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