B · Launching Effectstream + Local Dev

Get the template

Our starting point is evm-midnight-v2 — a working EVM + Midnight app that ships inside the Effectstream monorepo. One clone, one install, and you have the whole thing.

Clone the monorepo — the template lives in templates/evm-midnight-v2
Each template is a self-contained workspace — copy it anywhere
bun install — ~30 s, ~1.8 GB, all from public npm
This folder is your home for the rest of the workshop

▼ details below

1Clone and install

git clone https://github.com/effectstream/effectstream.git
cd effectstream/templates/evm-midnight-v2
bun install

verify (~30 s, ~1.8 GB of node_modules)

$ bun install
+ 1000s of packages, no errors

What you just got

Every template in templates/ is an independent Bun workspace: its dependencies are the published @effectstream/* packages from npm, not the surrounding monorepo source. That means you can copy this folder anywhere and it still works — the monorepo around it is just a convenient delivery vehicle (and, later, a source of other templates to raid).

Folder	What's inside
`packages/node/`	the sync node: config, grammar, state machine, API
`packages/database/`	migrations + typed SQL queries
`packages/batcher/`	the gasless input batcher
`packages/contracts-evm/` · `contracts-midnight/`	the on-chain contracts (Solidity · Compact)
`packages/frontend/`	the template's demo React frontend (we'll build our own page instead)

Checkpoint

bun install finished cleanly inside templates/evm-midnight-v2. Next: First launch — do it before the live session, it downloads the Midnight chain binaries.

← Install (pre-work)First launch →