AtomicMemeHook

Pons lets anyone launch a meme coin. Every trade pays a small fee, which is split between Pons, the token creator, and buying back the coin.

• Small fee on every trade

  After each trade, the hook keeps a small fee from it.

  The code that does this (afterSwap):

  function _afterSwap(
      address,
      PoolKey calldata key,
      SwapParams calldata params,
      BalanceDelta delta,
      bytes calldata hookData
  )
      internal
      override
      returns (bytes4, int128)
  {
      PoolId poolId = key.toId();
      uint256 bookFilled;
      bytes32 slot = BOOK_UNSPECIFIED_SLOT;
      assembly {
          bookFilled := tload(slot)
          tstore(slot, 0)
      }
      bool holdersInToken;
      bytes32 holdersSlot = HOLDERS_IN_TOKEN_SLOT;
      assembly {
          holdersInToken := tload(holdersSlot)
          tstore(holdersSlot, 0)
      }
      LaunchInfo memory info = launches[poolId];
      if (!info.registered) return (IHooks.afterSwap.selector, 0);
      if (info.hookFeeBps == 0 && info.creatorTaxBps == 0) return (IHooks.afterSwap.selector, 0);
      if (_quoteIsSpecified(params, info)) return (IHooks.afterSwap.selector, 0);
  
      int128 quoteAmount = info.memecoinIsCurrency0 ? delta.amount1() : delta.amount0();
      // …

• The token creator gets a share

  The collected fees are split between Pons and the token creator.

• Buys back the coin

  Part of the fees is used to buy the coin and lock it away, which supports its price. Each buyback is capped so it doesn’t move the price too much.

Who controls it: The hook developer (Pons) sets the fee and tax rates, how the fees are split and who receives them, for all coins. The code itself can’t be changed.

What do these labels mean? This hook’s code works like PonsV2MemeHook (same design, possibly different settings or names), so this is that contract’s description.