Anti-snipe protection

DegenX applies a short, decaying tax to early curve buys. It discourages racing the opening transaction; it does not guarantee that bots cannot trade or that an early buyer will make a loss.

Creators choose the duration

• Select 1–60 seconds when creating a launch.
• The current protocol default is 5 seconds.
• In the ABI, LaunchConfig.snipeTaxSeconds = 0 means inherit the factory default. It does not request a zero-second window.
• Values above 60 seconds revert.
• The chosen duration is copied into the new gauge. It cannot be changed for that launch later.

Read gauge.snipeTaxSeconds() to find a token’s actual duration. A 5-second assumption is incorrect for a creator who selected 30 or 60 seconds. The owner may change factory defaults for future launches, including disabling the default tax; that does not rewrite an existing gauge.

How the tax decays

The configured starting rate is currently 9,900 basis points (99%). Before the window ends:

elapsed = block.timestamp − launchTime
rawBps = startBps >> floor(elapsed × 14 / windowSeconds)
effectiveRate = min(rawRate, 100% − buyFee − creatorTax − 1%)

The right shift halves the integer rate at each step. Once elapsed >= windowSeconds, the tax is zero. The cap leaves room for the regular fees and at least 1% of the gross input to reach the curve.

For a 5-second window, 1% buy fee, 0% creator tax, and a non-exempt buyer:

Elapsed seconds	Effective anti-snipe tax
0	98% (99% starting setting, clamped)
1	24.75%
2	3.09%
3	0.38%
4	0.04%
5 or later	0%

This is additional to the regular buy fee. The contract uses block timestamps and integer rounding, so do not interpolate it as a smooth linear countdown.

Exemptions and distribution

The original creator and initial fee recipient are exempted at initialization. A creator may also supply up to 32 additional exemption entries. The exemption mapping is fixed at creation; changing the fee recipient later does not rewrite it.

The tax applies to buys, not sells. Collected anti-snipe tax enters the standard fee-distribution bucket; it is not a token burn.

Integration rules

Read snipeTaxRate(buyer) on the gauge. It returns a 1e18-scaled fraction, not basis points. quoteBuyExactQuote(quoteIn, buyer) already includes this rate.

The deployed launchpad uses msg.sender as the buyer and recipient. A custom intermediary router becomes that caller; do not assume passing an end-user address to an off-chain quote makes execution use that user’s exemption. There is no generic recipient argument in the deployed curve-buy entry point.

Buy, sell and quote examples use direct wallet calls and match these semantics.