Twins
One launch creates two coins: Twin S on pump.fun (Solana, quoted in SOL) and Twin E on Elysium (Kinetiq's L2 for Hyperliquid, chain 99901, quoted in HYPE). Both have 1,000,000,000 supply, the same name, ticker and image. Half of all creator rewards on each side buys back and burns the other side.
pump.fun side
The coin is created with pump.fun's own instructions and, in the same transaction, its creator fee is split through pump.fun's fee program:
| S_OUTBOX → buy & burn Twin E | 5000 bps (50%) | changeable: never |
| Your wallets | 4500 bps (45%) | changeable: never (set once at launch) |
| Platform | 500 bps (5%) | changeable: never |
create_v2 → create_fee_sharing_config → update_fee_shares_v2 run atomically. pump.fun allows the split to be set exactly once (error 6024 FeeSharesAlreadyUpdated afterwards). The site re-reads the config every hour and shows “50% locked by pump.fun ✓” only when it is final and the outbox holds 5000 bps.
Elysium side
Twin E launches on our own launchpad: a bonding curve that starts near 30 HYPE market cap and graduates at about 100 HYPE raised into a constant-product pool whose liquidity can never be withdrawn.
| Fee | → burn Twin S | → your 50% | Platform | |
|---|---|---|---|---|
| Bonding curve | 1.25% | 0.30% | 0.30% | 0.65% |
| Pool | 1.00% | 0.30% | 0.30% | 0.40% |
CROSS_BURN_BPS = 5000 is a constant. The owner can only pause new launches and set parameters for future coins; every live coin keeps the fees it was created with. The first 10 seconds after launch cap buys at 2 HYPE per wallet.
The bridge
Fees are collected every 10 minutes with permissionless calls. Each twin has its own Solana outbox; on Elysium the launchpad sends the cross half to one outbox and the books attribute it per twin. Batches go through Relay with the recipient fixed to the other twin's burner. A quote with more than 3% impact is skipped.
Burns
On Elysium, Relay delivers HYPE straight into the twin's BurnVault. Anyone can call burn(): it buys at most 1.5% of liquidity, only while the price is within 10% of its 5-minute TWAP, fee-free, and burns everything it bought. On Solana the burner buys and burns in one transaction, at most 2% of liquidity per chunk, with 30–120 s pauses. Both are real burns: supply goes down.
Your 50%
Me: all to your wallet. Split: up to 8 wallets per chain. Holders: on Elysium the token keeps a reward pool; holders claim on the twin page. Mix: you and holders. Payouts on Elysium accrue in the CreatorVault; withdraw them from the twin page.
FAQ
Can the 50% cross-burn ever change?+
No. On Solana, pump.fun's own fee-sharing program locks the split when the coin is created (the config is written once and its admin is revoked). On Elysium, 50% is a constant in a contract with no proxy and no upgrade path.
What can I do with my 50%?+
Keep it, split it across up to 8 wallets per chain, share it with holders, or mix. Choose Locked (fixed forever) or Flexible (change the Elysium side later). On pump.fun your recipients are always fixed at launch, because pump.fun allows the split to be set only once.
Are the two coins the same token?+
No. Same name, ticker and picture, two separate coins on two chains with their own prices. They are not convertible, so the difference in caps (Twin gap) is not an arbitrage.
How fast is a burn?+
Fees are collected every 10 minutes. A batch is bridged once it is big enough (0.5 SOL / 0.6 HYPE) or every 6 hours if it is worth at least $10. Relay delivers in seconds to minutes, then the burner buys in small chunks with pauses between them.
What if one twin dies?+
If a twin has under $1k of liquidity or no trades for 72 hours, the cross-burn funds meant for it wait in its outbox. They cannot go anywhere else, and they move as soon as it trades again.
Who runs the bridge?+
A keeper with one allowed action: send the outbox balance through Relay to the other twin's burner. Every transfer is listed on the Transparency page and reconciled every hour; a mismatch pauses that pair.
Why do burns not pay fees on Elysium?+
Cross-burn buys go through a per-coin BurnVault that the launchpad recognises, so the money that should burn tokens isn't spent on fees.
Does pump.fun keep any powers over my coin?+
pump.fun keeps global admin rights, including community takeovers that can reset a coin's creator. That is outside Pumpysium's control and applies to every pump.fun coin.
Addresses and reconciliations live on the Transparency page.