> ## Documentation Index
> Fetch the complete documentation index at: https://docs.waifu.fun/llms.txt
> Use this file to discover all available pages before exploring further.

# quickstart

> deposit BNB into a launch, in five minutes

depositing into a launch is one transaction. you send BNB to the launch's
vault, and you wait for one of two outcomes: tokens (LAUNCHED) or your BNB
back plus a bonus (REFUND).

<Steps>
  <Step title="find a launch">
    browse open launches on [waifu.fun](https://waifu.fun). every launch shows
    its tier, cap, current total deposited, and close window. pick one.
  </Step>

  <Step title="connect your wallet">
    metamask, rabby, or any BSC-compatible wallet. you will be on chain id 56
    (BSC mainnet).
  </Step>

  <Step title="deposit BNB">
    click "deposit." enter the amount. confirm the transaction. you are calling
    `LaunchVault.deposit()` with `msg.value` equal to your amount.

    your deposit is recorded as `depositors[you].deposited += amount` and the
    vault total goes up by the same. you do not get tokens yet. tokens come
    after the bundle executes.
  </Step>

  <Step title="wait for the cap or the window">
    the launch either fills (total >= cap) and the bundle bot picks it up, or
    the window expires (`closeTimestamp` reached) with the cap not met and the
    vault goes to `REFUND`.

    you do not need to be online for either outcome. the contracts handle it.
  </Step>

  <Step title="claim or refund">
    if the launch hit `LAUNCHED`, call `claim()` on the vault. you receive
    tokens pro-rata. if vesting is enabled, you get 50% at TGE and 50% linear
    over 24 hours, so you may need to claim more than once.

    if the launch hit `REFUND`, call `refund()` on the vault. you receive your
    principal back plus a pro-rata bonus from the bonus pool (if there is one).
  </Step>
</Steps>

## what you should know before depositing

* **your BNB is locked until the launch resolves.** you can withdraw before
  the window closes (`withdraw()`), but once the vault transitions to `CLOSED`
  or `LAUNCHED`, deposits are frozen until claim or refund.
* **the launch can refund.** under-subscription, bundle failure after retries,
  or admin emergency stop all trigger refund. read
  [refund safety](/presalers/refund-safety) for the full list.
* **tokens can go to zero.** even a successful launch is not a guarantee of
  price. you are buying a token. tokens can drop 90% in an hour. read
  [risks](/presalers/risks).
* **the platform cannot drain the vault.** the vault contract is immutable
  per launch. the only privileged action the platform owner has is
  `adminEnableRefund`, which transitions the vault to `REFUND` and returns
  your BNB.

## the three windows

* **OPEN.** deposits accepted. you can `withdraw()` to back out before close.
* **CLOSED.** deposits frozen. the bundle bot has the launch in its queue.
  if the bundle succeeds you transition to `LAUNCHED`. if it fails after
  three retries, you go to `REFUND`.
* **LAUNCHED or REFUND.** terminal. claim tokens or refund BNB.

## quick checks before you deposit

* does the cap make sense for the project? a 160 BNB cap with no community
  is going to refund.
* does the metadata match the social channels? if twitter does not exist or
  is brand-new, that is a yellow flag.
* is the vault address the same one announced by the creator? always verify
  the on-chain address.