ENVIRONMENT.md — Local Dev Stack

How to start, stop, and verify the harb development environment.

Stack Overview

Docker Compose services (in startup order):

Service	Purpose	Port	Health Check
anvil	Local Ethereum fork (Base Sepolia)	8545	JSON-RPC response
postgres	Ponder database	5432	pg_isready
bootstrap	Deploys contracts to anvil	—	One-shot, exits 0
ponder	On-chain indexer + GraphQL API	42069	HTTP /ready or GraphQL
landing	Landing page (Vue 3 + Vite)	5174	HTTP response
webapp	Staking app (Vue 3)	5173	HTTP response
txn-bot	Automated recenter/tx bot	—	Process alive
caddy	Reverse proxy / TLS	80/443	—
otterscan	Block explorer	5100	—

Quick Start

cd /home/debian/harb

# Start everything
docker compose up -d

# Wait for bootstrap (deploys contracts, ~60-90s)
docker compose logs -f bootstrap

# Check all healthy
docker compose ps

Verify Stack Health

# Anvil (local chain)
curl -s http://localhost:8545 -X POST -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","method":"eth_blockNumber","params":[],"id":1}' | jq .result

# Ponder (indexer + GraphQL)
curl -s http://localhost:42069/graphql -X POST \
  -H 'Content-Type: application/json' \
  -d '{"query":"{ stats { id } }"}' | jq .

# Landing page
curl -sf http://localhost:5174 | head -5

# Staking app
curl -sf http://localhost:5173 | head -5

Container Network

Services communicate on harb-network Docker bridge. Internal hostnames match service names (e.g., ponder:42069).

Landing page container IP (for Playwright testing): check with

docker inspect landing --format '{{.NetworkSettings.Networks.harb_harb-network.IPAddress}}'

Common URLs (for testing/review)

Landing: http://172.18.0.6:5174 (container IP) or http://localhost:5174
Staking app: http://localhost:5173/app/
Ponder GraphQL: http://localhost:42069/graphql
Anvil RPC: http://localhost:8545

Resource Notes

8GB VPS — running full stack uses ~4-5GB RAM
npm install inside containers can OOM with all services running
Landing container takes ~2min to restart (npm install + vite startup)
4GB swap is essential for CI + stack concurrency

Staking App Passwords

For testing login: lobsterDao, test123, lobster-x010syqe?412! (defined in web-app/src/views/LoginView.vue)

Contract Addresses

After bootstrap, addresses are in /home/debian/harb/tmp/containers/contracts.env. Landing sources this file on startup for VITE_KRAIKEN_ADDRESS and VITE_STAKE_ADDRESS.

Playwright Testing

# Chromium path
/home/debian/.cache/ms-playwright/chromium-1209/chrome-linux64/chrome

# Run against landing (block fonts for speed)
NODE_PATH=$(npm root -g) node test-script.cjs

See tmp/user-test-r4.cjs for the most recent test script pattern.

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