Robinhood Chain · Mainnet

Prepare for launch.

The contract, funds and services must be ready before the first buy-in. Each transaction will be presented in your wallet.

Real-money games closed

Operator wallets.

Dedicated keys are held by the Railway services. Fund the coordinator, relayer and draw operator with ETH on Robinhood Chain before opening tables. Validators sign off-chain.

Table coordinator: 0x370c1001d38E42ACf86DB9724dc4CC0b70d544Df
Draw operator: 0x54f77d5356a30AdaC7f1CEF7A9f2007C7C5a79aA
Settlement relayer: 0x3efB3644aA31f50E297e0Da592eFFa6f1A213020

After deployment, the administrator assigns the coordinator with setTableCreator. This role can open tables; it cannot withdraw funds. The deployment must also be registered in the published client before deposits are enabled.

Starting gas budget: 0.003 ETH per operator. Each service currently requires at least 0.0012 ETH to stay ready. Keep an additional 0.003 ETH in the deployment wallet; total starting budget: 0.012 ETH. Actual transaction fees are recalculated before signing.

Open online tables ↗

01 · Wallet and administration

Who manages SPINS?

The connected wallet pays the deployment fees. The administrator will be able to open tables, pause buy-ins and withdraw the free reserve.

Administrator public addressThis role is separate from the wallet that receives the rake.

02 · Contract and services

Prepare the contract.

SPINS runs the draw server. Its dedicated operator records the result in our draw contract; the escrow applies the fixed odds. This is trusted server randomness, with no external VRF provider.

Follow these four steps. Review each transaction here, then confirm it in your wallet. Verified contract addresses are filled in automatically.

1
Deploy draw contract
Creates the contract that records the server’s draw.
2
Deploy SPINS contract
Creates the contract that holds buy-ins and pays winnings.
3
Link draw to SPINS
Permanently connects these two contracts. This link cannot be changed.
4
Activate table coordinator
Allows the dedicated coordinator to create tables.

SPINS draw contract address

Reviewed draw contract code hashThis comparison detects different code. It does not prove that the draw is fair.

Validator 1

Validator 2

Validator 3

Transaction fee limit · ETHVerification blocks deployment if its estimate exceeds this amount. Also check the total shown by your wallet.

I have already deployed the contract

SPINS contract addressThe code and parameters will be checked without making changes.

03 · Owner approval

Review before opening.

This message authorizes admission for the scope below. Signing costs no gas. It does not deploy a contract or transfer tokens.

Internal security review. SPINS operates the dealer, draw server and validators. The server can select or withhold draws and knows the cards. These reports are not an external audit.

I have read the reports and accept the stated server trust and admission scope.

Available reserve.

Funding wallet

0x6cdc0Af4CD5d8e43b37285FbeA18d465cD208e3c

— USDG

These funds remain in the wallet. A contract deposit funds prizes above ×3. The three buy-ins are enough for ×2/×3.

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Average rake

10%

Players per table

The average rake is 10%, built into the probabilities and credited on completed ×2 games. The winner receives the full displayed prize.

Rake recipient: 0xE83CAD3EeE5CE64dd39192feBE83250807013C70

Before opening.

Requirements still blocking real-money games.

SPINS draw service to activate
The server chooses the multiplier. Deploy and bind the SPINS draw contract, fund its operator with ETH, and verify recovery before opening entries.
Validator roles to activate
Dedicated validator keys are prepared below. Services in one Railway account do not establish independent operators.
Production activation checks
The online table is connected to the Railway game API. Live payments remain closed until the deployed contract, oracle, RPC and signed operating evidence are verified.
Table funding coverage to verify
The three buy-ins cover ×2/×3. Higher prizes require additional funds deposited in the contract.

04 · Table budget

Plan the initial reserve.

This amount is used to prepare for launch. Changing it does not move any money. Reserve contributions belong to the house bankroll; they are not a player balance.

Planned amount · USDG

Buy-in per player	Additional reserve required	Prize cap with planned budget
2 USDG	0 USDG	6 USDG
5 USDG	0 USDG	15 USDG
10 USDG	0 USDG	30 USDG
25 USDG	0 USDG	75 USDG
50 USDG	0 USDG	150 USDG
100 USDG	0 USDG	300 USDG
250 USDG	0 USDG	750 USDG
500 USDG	0 USDG	1,500 USDG

Each row shows a single table in isolation. The three buy-ins cover ×2/×3 with no reserve. For a higher prize cap, table creation reserves only the additional amount: prize cap minus three buy-ins. Subsequent tables use the remaining free capital; the draw waits for all three payments.

Current launch limitations

The contract has not been audited by a third party. Two validators could choose the wrong winner or refuse to sign; a timeout then refunds the buy-ins without paying the jackpot. The dealer knows the cards. The reserve guarantees financial coverage, not the correctness of the result. The draw server can select or withhold a result before it is recorded. Recorded results cannot be replaced; refunds do not prove that completed draws are unbiased. The implementation, key custody and failure recovery still require review.

Official network Official USDG Game rules & server trust