Coming to Robinhood Chain

Two things are coming to Robinhood Chain: stablecoin rooms in The Tank and the CROAKZ skin collection. Both stay switched off until they are ready.

Coming soon

Rooms and skins are not live yet and have no launch date. This page explains how they work, not when they open. Follow @croakzgg for the announcement.

Stablecoin rooms

Same Tank, same rules. The difference: entries are in a stablecoin and the pot is held by a smart contract, not by us.

The escrow flow

Step	Who	What happens
1. Create	CROAKZ operator	A room is opened on the contract for an approved entry amount.
2. Join	You	Your entry moves from your wallet into the contract. Either approve the stablecoin then join, or sign a permit and join in a single transaction. One wallet can join a room once.
3. Leave	You	Before the room is locked, leave and get your full entry back.
4. Lock	CROAKZ operator	When the match starts on the game server, the room is locked. It needs at least 2 players. No more joining or leaving.
5. Settle	Anyone	The resolver signs the result. Anyone can submit that signature. The contract pays the winner the pot minus the rake and sends the rake to the treasury.
6. Refund	Anyone	If a locked room is not settled within 1 hour, anyone can trigger a refund. Every player gets their full entry back.

A room that never fills can also be cancelled by the operator before it locks. Everyone gets refunded.

What the contract checks on settle

• The signature comes from the resolver address. It is an EIP-712 typed signature over the room, the winner and a deadline.
• The deadline has not passed.
• The winner actually joined that room. The pot can only go to a player who was in it.
• The rake is taken at the current rate, and that rate can never go above 10%. The cap is written into the contract.

The rake in stablecoin rooms

In Teeth rooms the rake is burned. In stablecoin rooms it goes to the CROAKZ treasury. It is hard capped at 10% of the pot by the contract.

To be announced

Stablecoin entry amounts and the rake rate for stablecoin rooms will be announced. The only fixed number is the 10% ceiling in the contract.

Trust model: the resolver

Plain version, no fine print.

The winner of a stablecoin room is decided by the CROAKZ game server. The result is then signed by one key, the resolver, operated by CROAKZ. The contract pays whoever the resolver says won.

What the resolver cannot do

• Send the pot to someone who was not in the room.
• Take more than the 10% rake cap.
• Keep your entry forever. If no valid result is submitted within 1 hour of the lock, anyone can refund every player.

What the resolver can do

• Name the wrong winner, by bug or by abuse. The contract cannot tell. It trusts the signature.

Other admin powers

The contract owner can pause new rooms and new joins, change the operator, resolver and treasury addresses, change the rake below the cap, and approve entry amounts. Pausing never blocks the way out: leave, settle and refund keep working while paused.

This is a centralised point of trust. If that is a deal breaker for you, stick to Free and Teeth rooms. No hard feelings.

Gas

Robinhood Chain charges gas in ETH, so you need a little ETH on Robinhood Chain to approve and join. The stablecoin is moved only through its standard ERC-20 interface. The contract never takes ETH as an entry.

To be announced

A relayed, gasless join is being considered.

CROAKZ skins

An NFT collection on Robinhood Chain. Minted in a stablecoin.

• ERC-721, with a fixed maximum supply.
• Allowlist phase first, then a public phase.
• A limit per wallet.
• Traits become exclusive cosmetics in the game. Still no gameplay advantage. A rare fin is a rare fin, not a faster one.

To be announced

Supply, mint price, per wallet limit, royalties, allowlist criteria and dates will be announced before the mint opens.

Robinhood Chain facts

Robinhood Chain is an Ethereum layer 2 built on Arbitrum.

	Robinhood Chain	Robinhood Chain Testnet
Chain ID	4663	46630
Gas token	ETH	ETH (test)
Explorer	robinhoodchain.blockscout.com	explorer.testnet.chain.robinhood.com

Contracts go to Robinhood Chain Testnet first. Their addresses will be listed here once deployed. The stablecoin used for rooms and the mint will be announced.

Where stablecoin rooms are available

Rooms where players put in money and the winner takes the pot can fall under gambling rules in some countries. Stablecoin rooms may be unavailable in your region, and access can be restricted by location.

To be announced

Stablecoin rooms open region by region, after a legal review and with their own terms. The list of regions will be announced.

Teeth is an off-chain platform currency with no guaranteed monetary value.