1. What Tuck is
Tuck is a non-custodial protocol on Robinhood Chain. Depositors lock a whitelisted ERC-721 together with a USDG backing stake; purchasers pay a pool-derived price and receive one randomly selected position. There is no operator discretion over who is drawn.
Interacting with Tuck means interacting with smart contracts directly. This interface is a convenience. It does not hold your assets, cannot move them, and cannot reverse anything you sign.
2. The house edge is real and it is against you
A purchaser pays 1.03 × the harmonic mean of active backings and can sell a drawn position back at 0.95 × its backing. The resulting edge is approximately 7.8% per acquisition, and it does not depend on pool composition.
One mechanism moves it. When the pool has been quiet, part or all of the 3% surcharge is rebated to the purchaser who breaks the silence, which at full rebate lowers the edge to roughly 4.9% for that one acquisition. The rebate is a function of the gap since the last request and is visible on-chain before you commit. It reduces the edge; it never removes it, and the operator can override the rate.
Accepting the standing bid on every draw loses money on average. The only way to come out ahead is to keep NFTs whose market value exceeds 95% of their backing. If you are not confident in that judgement, you should expect to lose.
3. Backing is a price commitment, not a deposit
When you deposit, the backing you name is an irrevocable bid. If your position is drawn and the purchaser accepts that bid, your NFT leaves and you receive the backing minus the applicable fee. You do not get to reconsider the price afterwards. Backing is fixed at deposit; withdrawal is the only way to change your exposure.
A depositor’s real risk is duration rather than principal. Selection weight implies an average lifetime, but any position can be drawn early and stop earning sooner than its weight implied.
4. Smart contract risk, and no external audit
The contracts have not been audited by an external firm. Review is being done by the operator. Smart contracts can contain faults that destroy or lock funds, and the fact that a protocol has run without incident so far is not evidence that it will continue to.
Do not deposit an NFT you are unwilling to lose entirely.
5. Randomness depends on a third party
Draws are resolved using the drand evmnet beacon, operated as a public good by the League of Entropy. It carries no service-level guarantee and its longevity is a soft commitment. The protocol keeps beacon adapters swappable, but an interruption to the beacon can delay draws.
6. Curation is a trust assumption
Which collections may be deposited is controlled by the protocol owner. Blocking a collection is permanent, but adding one is an owner decision and there is currently no timelock on that power. You should price that in.
7. Fees
A 3% surcharge is added to the pool price and a 5% settlement discount is applied on sell-back. Keeping a drawn NFT carries a 1% fee taken from the depositor’s backing return. All of these are shown before you commit to an action, never after.
Of the surcharge, two thirds is shared equally across active positions and one third is protocol revenue. A tithe of 0.25% of the acquisition price is carved out of the protocol’s share for the Crown holder — the single highest-backed position. It is taken from the protocol’s share and never from the depositor share. Crown is built but disabled during Phase 1.
8. TUCKERS carries a share of protocol fees
TUCKERS is a 2,000-piece NFT collection issued by the same operator and is the first collection whitelisted for deposit. Each TUCKERS token carries a tier that determines a share of protocol revenue. This makes it a fee-sharing instrument, not only a collectible, and you should treat it accordingly.
Read that plainly: an instrument that pays holders a share of a business’s revenue may be treated as a security in your jurisdiction. No determination has been made, no registration has been sought, and no legal opinion has been obtained. If that characterisation would create a problem for you, do not acquire TUCKERS.
Fee share is paid only out of revenue the protocol actually collects. If there are no acquisitions there is no revenue and no share. Tier distribution is committed on-chain before the mint and revealed afterwards, so the rarity you receive cannot be changed after the fact — but rarity governs fee weight, not value, and nothing about the payout is guaranteed.
9. $TUCK, points, and the retroactive allocation
$TUCK is a separate token launched on Bankr. It is not required to use the pool and confers no claim on protocol assets. During Phase 1 the protocol records points for purchasers and depositors on-chain. Points are a record of participation. They are not a token, not a promise of a token, and not redeemable for anything.
Any retroactive allocation is at the operator’s discretion as to timing and mechanism. Operator seed positions are excluded from point accrual in the contract itself rather than by an off-chain filter, so that exclusion is verifiable. Nothing here entitles you to a distribution.
10. No advice, no guarantees
Nothing on this site is financial, investment, legal or tax advice. No return is promised, projected or implied. Figures shown are protocol parameters, not forecasts, and past pool activity does not indicate future activity.
11. Your responsibility
You are responsible for your wallet, your keys, the network you connect to, and for confirming that using this protocol is lawful where you are. Access may be restricted in some jurisdictions. If you are subject to sanctions or prohibited from using such services, do not use Tuck.
12. Changes
These terms may change as the protocol moves through its phases. The version identifier appears at the top of this page; a material change resets acceptance and you will be asked to review them again.
This document is written to be honest about how the protocol behaves. It has not been reviewed by a lawyer and is not a substitute for legal counsel.