Crumble documentation
Every crumb
counts.
Crumble rounds up the swaps you already make and puts the change into a basket of tokenized stocks that only your wallet can open.
You trade a memecoin for $7.42. Crumble rounds that to $8.00, takes the 58 cents, and buys you slices of NVDA, TSLA, AAPL — whatever basket you picked. The stocks are credited to you inside the vault contract, and you can take them out whenever you like.
That is the entire product. These pages explain exactly how it works, what the contract can and cannot do, and what you are taking on by using it.
Read the contract. The vault is verified on Blockscout, which means the explorer itself confirms that the source shown there produced the bytecode running at the vault address. You do not have to take our word for any of this — and you should not.
Start here
The round-up maths, the single transaction, and what lands in your vault.
02Wallet and custodyWhat you sign, what you approve, and how to get everything back out.
03FeesOne percent of the change. What that means and what we never charge for.
04SecurityEvery power the owner has, written against the actual contract.
05Robinhood ChainThe network, the stablecoin, the pools and the Stock Tokens we buy.
06RisksThe honest list. Read it before you put a cent in.
The short version
| What it does | Rounds your swap up to the next $1, $5 or $10 and invests the difference. |
| What you get | Tokenized stocks, credited to your address inside the vault. |
| Who holds them | You. Withdrawal is unconditional and cannot be paused. |
| Fee | 1% of the change only, hard-capped at 5% in the contract. |
| Network | Robinhood Chain, an Arbitrum Orbit L2. Chain ID 4663. |
| Where it trades | Canonical Uniswap v3 pools on that chain. |