Live on Solana
Back a token before
it hits pump.fun.
Your SOL makes the first buy. A trades it; you keep 75% of the profit.
- Backer share of agent profit
- 75%
- Buys and burns Holdfast
- 25%
- Creator cut of fees
- 0%
- Holdfast takes
- 1% launch fee
Holdfast Live Test $HFLIVE
7cCC…GaowLive
-4.5% 24h mcap
HoldPrice inside band (−0.4% vs EMA)
Simulated with the vault agent’s rules · drag the price
Held in vault
Vault agent
Backer share of fees
How it works
The 2-minute version, with numbers ›Back
Put SOL into a raise before the token exists. If the raise misses its minimum, you get 100% back.
Launch on pump.fun
The pooled SOL, minus the 1% launch fee, creates the token and makes its first buy, the , before anyone else can trade. Those tokens go into a .
Earn
A rate-limited sells into rallies above cost and buys back dips. You get 75% of its realized profit; 25% buys and burns the Holdfast token.
Program EduE…6AMQ · mint authority revoked at creation · fees frozen per launch · agent limits enforced on-chain · vault withdrawals only by the platform admin, each one public. Verify →
How a launch works
Four beats, each one enforced by an instruction on-chain. How it works ›
01
Back the raise
Backers pool SOL before the token exists. Miss the minimum and everyone is refunded in full.
Refund: 100% if min not met or creator cancels
02
The bundle buys first
At launch the token is created on pump.fun and the pool, minus the 1% launch fee, makes the first buy, before any public trade can exist. The tokens go into the vault. Only the vault agent trades them; the platform admin can withdraw, and every withdrawal is public.
Bundle: ≤ 25% of supply
03
The agent defends
It buys dips at least 2% under the and at or below the vault’s cost, and sells rallies above both. Rate-limited, on-chain.
Per window: ≤ 10% of vault SOL
04
Backers earn
75% of the vault agent's realized profit goes to backers, pro-rata to their deposit; 25% buys and burns the Holdfast token. pump.fun's creator fee flows 75% into the vault and 25% to the same buyback pool. Claim any time.
75% of agent profit to backers, 25% to buyback and burn
Buys the dip. Sells the rip. Never at a loss.
The vault agent trades each vault against its own curve, under limits frozen into the launch. Drag the price and see what the program would let it do.
Read the agent rules →Vault agent decision
Price inside band (−0.4% vs EMA)
- Price ≥ 2% under EMA−0.4% vs EMA
- Fill ≤ vault avg costavg cost 0.0₇307
- Window budget left0 SOL left
- Impact ≤ 3%max 3%
Buy rules from $HFLIVE’s terms, frozen at creation · on-chain checks only
Seeded with $HFLIVE’s live vault, curve and window budgets on mainnet. Nothing is sent; this is the program’s arithmetic.
Rules you can check, not promises.
Every instruction the program exposes, read from its IDL — including admin_withdraw_vault, which lets the platform admin (a multisig on mainnet) withdraw a vault. Every withdrawal is on-chain and shown on the launch page.
Launch lifecycle
- create_launchAnyoneCreate fee → fee recipient; mints 1B tokens to the curve
Creates the launch, mints the fixed 1,000,000,000 supply to the curve, revokes the mint authority in the same instruction, and freezes the fee split and agent limits into the launch.
- depositAnyoneYour SOL → the launch (raise)
Joins the raise as a backer. Deposits are clipped to the room left under the max raise and the per-wallet cap.
- cancel_launchCreatorNothing — opens full refunds
The creator can abort a raise before it launches. Every backer can then refund 100%.
- refundBackerYour deposit → you
Returns the full deposit when the raise missed its minimum by the deadline or was cancelled.
- launchCreator, or anyone once readyRaise → bundle buy → vault; launch fee
Opens trading. The bundle buy runs first, before any public trade can exist; the tokens and the SOL reserve go into the vault.
- wind_downAnyone, once eligibleVault tokens → curve; curve + vault SOL → backers
Ends a live launch that is at least 3 days old, no trade for 24 hours, and no tokens held outside the curve and vault. Returns the vault's tokens to the curve, credits the curve's and vault's SOL to backers pro-rata (claim_backer_fees) and stops trading for good.
Trading
- buyAnyoneYour SOL → curve; tokens → you; trade fee
Buys on the constant-product curve. The trade fee is split between backers, the creator and the platform.
- sellAnyoneYour tokens → curve; SOL → you; trade fee
Sells back into the Holdfast curve (legacy launches only; pump.fun launches trade on pump.fun). The curve's liquidity never migrates, so it is always there to sell into.
Vault agent
- agent_buyAgent authorityVault SOL → curve; tokens → vault
Only on dips at least the band under the EMA, at or below the vault's average cost (or a buy-back below the average sell), within the window budget and impact limit.
- agent_sellAgent authorityVault tokens → curve; cost → vault; profit → backers
Only into rallies at least the band over the EMA, at a fill of at least the vault's average cost plus the band, within the window budget and impact limit. The realized profit over average cost goes 100% to backers.
Fees
- claim_backer_feesBackerYour accrued fees and profit share → you
Pays the backer's pro-rata share of trade fees, vault-agent profit and any wind-down payout accrued so far. Claim any time.
- claim_creator_feesCreatorCreator fees → creator
Pays the creator's share of trade fees on their launch.
- sweep_platform_feesAnyonePlatform fees → the fixed fee recipient
Permissionless: it can only ever pay the platform's configured fee recipient.
Platform admin
- admin_withdraw_vaultAdminVault SOL and tokens → fee recipient
Withdraws any amount of a launch's vault SOL and tokens to the platform fee recipient. It can't touch the curve's liquidity. Every withdrawal emits VaultWithdrawn and is shown on the launch page.
- initialize_platformAdminNothing — creates the platform config
One-time setup by the program's upgrade authority: fee recipient, agent authority and default params.
- update_platformAdminNothing — params for future launches
Changes defaults for launches created afterwards. Existing launches keep the terms frozen at their creation.
- set_fee_recipientAdminNothing — where platform fees and vault withdrawals go
Points platform fee sweeps and vault withdrawals at a new recipient.
- set_agent_authorityAdminNothing — which key may call the agent instructions
Rotates the vault agent's key. Whoever holds it can still only call agent_buy and agent_sell.
- propose_adminAdminNothing
Starts a two-step admin handover.
- accept_adminProposed adminNothing
Completes the handover; the new key must sign.
Other
- agent_buy_pumpagentWrites agent, launch, pump_authority, vault_tokens
Signed by agent.
- agent_sell_pumpagentWrites agent, launch, pump_authority, vault_tokens
Signed by agent.
- buyback_burncrankerWrites cranker, launch, pump_authority, buyback_mint, burn_tokens
Signed by cranker.
- collect_pump_feescrankerWrites cranker, launch, creator_vault
Signed by cranker.
- create_launch_pumpcreatorWrites creator, platform, fee_recipient, launch
Signed by creator.
- graduate_pumpAnyoneWrites launch
Signed by anyone.
- launch_pumpcrankerWrites cranker, launch, pump_authority, mint, bonding_curve, associated_bonding_curve, metadata, vault_tokens, fee_recipient, creator_vault, user_volume_accumulator, buyback_fee_recipient
Signed by cranker.
- migrate_launchadminWrites admin, launch
Signed by admin.
- migrate_platformadminWrites admin, platform
Signed by admin.
- wind_down_pumpcrankerWrites cranker, launch, pump_authority, vault_tokens
Signed by cranker.
- EduE…6AMQ
Program deployed
Executable, upgradeable loader
- 6vUg…zBWF
Upgrade authority
Held by the platform admin key
- 7cCC…Gaow
Mint authority revoked
$HFLIVE: mint none · freeze none
- 6Pok…jZNZ
Vault PDA
$HFLIVE’s vault, owned by its launch account · withdrawals by the admin only
- Chpz…NGD8
Fees frozen per launch
$HFLIVE: 1% fee · 50% / 30% / 20% split
- Fvbd…tWKP
Agent authority
Can only sign agent_buy and agent_sell
Where the money goes
Every launch freezes its split at creation. Creators take no cut of fees; backers take most of the vault agent’s profit; the rest buys and burns the Holdfast token.
For backers
- 75% of the ’s realized profit, split by deposit (). Claim any time.
- 100% of your SOL back if the raise misses its minimum or the creator cancels.
- The vault’s SOL back if the coin dies and anyone runs the .
For creators
- 0% of fees to you, so there is no creator cut to dump on your holders.
- pump.fun’s creator fee goes 75% into your launch’s as market-making capital and 25% to the .
- You pay the 1% launch fee and 0.02 SOL create fee. Nothing else.
For the Holdfast token
- 25% of every vault agent profit and 25% of every pump.fun creator fee land in the , which buys the Holdfast token and burns it.
- Holdfast itself earns only the 1% launch fee and the create fee.
- No price promises: what the token does is up to the market.
Launch in one transaction.
- Fixed 1B supply, mint authority revoked
- Your backers can’t dump on your community
- 0% of fees to you: pump.fun’s creator fee goes 75% into your vault, 25% to the buyback pool
Bundle preview
| Figure | At minimum | At maximum |
|---|---|---|
| Bundle | 10.35% of supply | 15.00% of supply |
| Tokens | 103.54M | 150.00M |
| SOL kept in vault | 1.49 SOL | 14.51 SOL |
| Start market cap | 37.33 SOL | 41.52 SOL |
With a 30% SOL reserve (adjustable in the wizard) and the 1% launch fee.
The agent, live
One signer, rate-limited on-chain, reporting every decision in plain words.
Questions
Can the creator dump the bundle?
No. The bundle is bought by the launch instruction and held in the vault, and the creator has no instruction that touches it. Only the vault agent trades it, on the launch's venue (pump.fun for new launches, the Holdfast curve for the two legacy launches), within its rules. The platform admin can withdraw vault SOL and tokens with admin_withdraw_vault; every withdrawal is on-chain and shown on the launch page. The vault ›
What if a raise misses its minimum?
Everyone is refunded in full. After the deadline anyone can open refunds and each backer claims 100% of their deposit; the same applies if the creator cancels. For backers ›
Can fees or agent limits change after I back?
No. Each launch copies the fee split and the agent limits into its own account when it's created. Platform changes only apply to launches created afterwards. Fees ›
What if the agent goes offline?
The vault stops trading until it's back. Public trading on the curve carries on, and the agent's heartbeat is public. Agent status ›
Why keep some of the raise as SOL?
The reserve is what the vault agent buys dips with. It can only buy at least 2% under the EMA and at or below the vault's average cost, so the reserve is never spent chasing price. Agent rules ›
Where does the token trade?
New launches are pump.fun tokens: the raise creates the token on pump.fun's bonding curve, buys the bundle there before anyone else can, and public trading happens on pump.fun (PumpSwap after graduation), not on this site. pump.fun pays the launch its creator fees: 25% buys and burns the Holdfast token, 75% goes to the vault. The two launches created before this change keep trading on the Holdfast curve, whose liquidity never migrates. For traders ›
What happens when a launch goes quiet?
Once a launch is at least 3 days old, no trade for 24 hours, and no tokens held outside the curve and vault, anyone can call wind_down: the vault's tokens go back to the curve, the curve's and vault's SOL is credited to backers pro-rata, and trading ends. The vault ›
What doesn't Holdfast protect against?
Other holders can still sell, and the platform admin can withdraw a vault (every withdrawal is public). Price can fall like any token — Holdfast makes the backers' bundle the first buy, not a price floor. Risks ›
How do I verify all this?
Every rule is an account or instruction you can open: the instruction list above comes from the program's IDL, and every token page has a Verify on-chain panel with explorer links. Verify on-chain ›