The app test network
A real ERC-4626 Bin at a real address, on a real chain. Deposit a faucet token, hold Draws, watch the share price move when fees are harvested in, and redeem. Every button below sends a transaction your own wallet signs.
Base Sepolia is a test network. None of this is worth anything. The ether
is free from a faucet, GRAIN is a token with a public mint() that gives
a thousand to anyone who asks, and the Bin has not been audited by anybody. That is
the only reason a vault written in a day is allowed to exist at all. Nothing here
is deployed on a network where money is real, and nothing here should be.
Or deploy your own copy
The Bin above is the one this site published. You can also deploy your own from the compiled bytecode in this repository — two transactions, a few seconds, and no cost beyond test gas.
The first deploys TestGrain, a faucet ERC-20. The second deploys the Bin that holds it, with you as owner and treasury and the protocol cut set to 10%. Your addresses are kept in this browser only — nobody else sees them, and this page will then show yours instead of the published one.
The Bin
- Bin
- 0x21f2056e60e002728cc12fb5c30e656f0d811319
- Asset (TestGrain)
- 0x2eb6216ceaef712fcf3526142daa1294c1b55cab
- Network
- Base Sepolia · chain 84532
Your position
Get some GRAIN
A thousand at a time, to anyone who asks. It is a faucet token and it is worthless.
Deposit
Send GRAIN in, get Draws back at the current price.
Redeem
Burn Draws, take the underlying back. No lockup, no queue — and see the Gate for what that does and does not mean.
Harvest by hand
Push GRAIN in as if it were fee income. The cut goes to the treasury; the rest raises every Draw at once.
That last button is the honest edge of this whole thing. On a real deployment a hook would push trading fees into the Bin and the share price would rise on its own. There is no hook. Nothing generates fees, so nothing raises the price unless somebody presses a button — which means this vault, deployed as it stands, would pay exactly zero. The accounting is real; the yield is not.