How Rainfall works

Rainfall is a launchpad on Solana. Every coin launched on it is a Token-2022 mint with a transfer fee of 1 to 5 %, chosen by its creator. The fee is taken on every transfer of the coin: buys, sells and wallet-to-wallet sends, on the bonding curve and after graduation. Every hour Rainfall collects it, sells it for SOL and sends the SOL to the coin's holders, pro rata to their balance.

Reflection tokens made BSC famous. Solana never had them because a classic SPL token cannot tax a transfer. A Token-2022 mint can, and Raydium LaunchLab lets a platform hold the authority that collects that tax. Rainfall runs its own LaunchLab platform for exactly that.

The pieces

• The platform. A Raydium LaunchLab PlatformConfig owned by Rainfall. It sets our platform fee, the creator fee, what happens to the LP at graduation, and the key that becomes each mint's withdraw-withheld authority.
• The coins. Each launch calls LaunchLab's InitializeWithToken2022 with a TransferFeeConfig at the chosen rate. Supply is minted once and the mint authority is revoked in the same instruction.
• The curve. Trading starts on LaunchLab's constant-product curve, paired with SOL, and moves to a Raydium CPMM pool at graduation.
• The rain engine. A keeper that runs every hour at :00 UTC: it withdraws the withheld tax, sells it for SOL and pays the holders. See the rain engine.

What a holder does

Nothing. Hold the coin in any Solana wallet and the SOL arrives in that wallet. My rain shows what each coin has paid you.

What a creator does

Open Launch, pick a name, a ticker, an image, a rain rate between 1 and 5 % and whether the rate melts after graduation. The rate ceiling and the melt floor are shown before you sign and cannot change later. The creator earns 0.25 % of every curve trade, claimable on the coin page.

The tax applies on every transfer, without exception. Some trading bots and aggregators skip taxed Token-2022 mints; that is a property of the coin, and it is stated on every coin page.