# launch

Anyone with a Base wallet, some USDC, and tiny ETH for gas can launch.

## Prerequisites

| Need          | Why                                                       | Approx cost |
| ------------- | --------------------------------------------------------- | ----------- |
| ETH on Base   | Gas for two transactions                                  | \~$0.20     |
| **$21+ USDC** | $1 deploy fee + ≥ $20 mandatory initial buy               | $21         |
| A wallet      | Any EIP-1193 wallet (MetaMask, Rabby, Coinbase Wallet, …) | —           |

## Step by step

{% stepper %}
{% step %}

### Open `/create`

<https://basefun.app/create>
{% endstep %}

{% step %}

### Fill metadata

* **Name** — the human-readable name (e.g. "Base Doge").
* **Symbol** — the ticker (e.g. "BDOGE"). Avoid digits if you can — some downstream tools parse the symbol back to a number.
* **Image** — uploaded to basefun's image service; the URL goes on-chain as the token's `imageURI`. Max 512 KB.
* **Description** — free-form text shown on the token page.
* **Socials (optional)** — X, Telegram, Website, GitHub, GitBook. Stored off-chain in the DB and editable post-launch by the creator wallet.
  {% endstep %}

{% step %}

### Pick the underlying

* **Pair** — one of 99 Avantis markets (BTC, ETH, SOL, EUR/USD, GOLD, S\&P, AAPL, etc.).
* **Direction** — long or short.
* **Leverage** — 2×, 3×, or 5×.

This triplet determines which `LeveragedToken` your bonding curve will use. If an LT already exists for `(pair, leverage, direction)`, your token reuses it (cheap). If it's the first ever launch for that combo, you'll pay the gas to deploy a fresh LT.
{% endstep %}

{% step %}

### Choose your creator fee recipient

Defaults to the connected wallet. You can point it at any address — a multi-sig, a treasury wallet, a co-creator. **This address is immutable** after deploy: 0.5% of every swap on the curve and post-grad goes to it forever.
{% endstep %}

{% step %}

### Sign the transactions

In order:

1. **USDC `approve`** (if first time interacting with the factory) — gives the factory permission to pull your $21+.
2. **LTFactory `getOrCreateLT`** — only if your `(pair, leverage, direction)` doesn't have an LT yet. Skip otherwise.
3. **FactoryV3 `createToken`** — deploys the bonding curve + token, charges $1 deploy fee, performs the initial buy atomically.

Wallet will show 1–3 confirmations depending on prior state.
{% endstep %}

{% step %}

### The instant it's confirmed

* Your token shows up in `/new` within \~2 seconds (indexer tail-polls every 1s).
* BaseScan verification fires automatically; the "✓ VERIFIED" badge lands in \~30 seconds.
* A Telegram alert posts in <https://t.me/basefunapp> within \~10 seconds.
* The keeper bot opens the Avantis perp with your initial-buy USDC within \~30 seconds.
* Anyone can now trade.
  {% endstep %}
  {% endstepper %}

## What you can change later

* Socials — POST to `/api/tokens/:address/socials` from the creator wallet (the UI exposes this on the token page).
* Nothing else. Supply, fee recipient, direction, leverage, name, symbol, and the underlying pair are all immutable.

## What you cannot do

* You **cannot** rug the curve. The token contract has no mint function reachable by you, the curve doesn't expose any "withdraw" call, and at graduation the LP is permanently burned at `0xdead`.
* You **cannot** change the creator fee recipient after launch — pick carefully.


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