Launch costs

Official launch fee

Pair reads the fee from the Pons factory rather than treating it as a permanent price. The reviewed transaction must pay the exact fee plus the opening purchase.

Pair also creates a per-launch vault and, for a non-ETH pairing, a pool. Those operations consume gas. A zero-percent opening purchase does not remove these costs.

Opening purchase

Buying a larger percentage of the fixed supply costs progressively more ETH on the bonding curve. The estimate includes the current base trading fee and the mandatory 2% creator tax.

The exact-output calculation rounds the required ETH upward so the selected token amount is covered. The final simulation checks the real contract behaviour; an estimate alone is not a guarantee that a transaction will succeed.

tokens = supply × selectedBasisPoints / 10,000
inputETH = floor(tokens × phantomReserve × 10,000
  / ((supply − tokens) × (10,000 − totalFeeBps))) + 1

Gas and failed transactions

Your wallet estimates network gas separately. Keep enough ETH for gas in addition to the displayed launch value.

A reverted transaction does not complete the launch or transfer the intended purchase into a successful new position, but it can still consume gas. A rejected wallet signature creates no transaction.