Getting started
The app runs in the browser. There is nothing to install. This copy is a local demo: balances live in your browser storage, and closing the data for this site clears them.
Create a wallet
- Open the app and choose Create a new wallet.
- Copy the 24 words, then confirm four of them.
- Set a password of at least 8 characters.
Already have a phrase? Log in with the 24 words and pick a password for this browser. The same words always rebuild the same demo address.
What each screen is for
- Wallet shows what you can spend, plus receive, send and swap.
- Mine runs a practice miner in this tab. Keep the tab open.
- Dashboard gathers holdings, a local invite link, and recent activity.
- Settings copies the address, reveals the phrase after the password, and can remove the wallet.
Mining
Press Start mining. The tab pretends to hash and, about once a minute, records a practice reward of 49.50 HBR. A real share of a multi-megahash network would wait much longer. The realistic wait is shown next to your hashrate.
From block 300 the rules send 1% of the 50 HBR subsidy to the treasury. The miner keeps 49.50 HBR plus fees. Rewards are not spendable immediately.
When you can spend a reward
The specification locks a reward for 100 blocks, about 17 hours at a 10 minute target, so a short reorganisation cannot erase a coin you already sent. This demo moves the clock faster: a practice reward unlocks after 8 demo blocks, a couple of minutes, so you can watch it mature.
- Closing the tab stops the miner.
- A reload pauses it for a moment. Turn on “Start when the app opens” if you want it to resume after unlock.
- Phones slow down background tabs. Keep the screen awake only while you mean to mine.
FAQ
Is this the live Harbor network?
No. Block height, hashrate, balances, swaps and bridge transfers are generated in your browser. Nothing is broadcast and no real HBR is created.
Where is the premine?
There isn't one. Coins enter through the block reward. You can add sample funds in the wallet if you want to try send, swap and the bridge before a practice block arrives.
What is dHBR?
A dollar token inside the demo. The bridge credits it when you “deposit” USDC or USDT, and burns it when you withdraw. The desk rate is one dollar token per dollar, after a 0.10% fee.
What is wHBR?
HBR wrapped one for one. Swapping HBR to wHBR does not change the supply. The demo prices 1 HBR at $2.40 when you swap into dHBR.
I lost the password.
The password only locks this browser. Log in again with the 24 words and choose a new password. If the words are gone too, this demo wallet cannot be opened.
Why was a block rejected?
In the practice miner a rare attempt is marked rejected, the way a real block can lose a race at the same height. The hashes still count. The reward does not.
Specification
These are the consensus numbers the interface is built around. The demo chain advances every 12 seconds so the screens stay alive. The target interval below is the published rule, not the demo clock.
| Rule | Value |
|---|---|
| Proof of work | Argon2id, 8 MiB per hash |
| Target block time | 10 minutes |
| Difficulty | ASERT with a one-day half-life |
| Supply cap | 21,000,000 HBR |
| Subsidy | 50 HBR, halved every 210,000 blocks |
| Treasury | 1% of the subsidy from block 300 |
| Maturity | 100 blocks |
| Signatures | Schnorr, BIP-340 |
| Addresses | bech32m, prefix hbr1 |
| Script | None. Payments and the listed assets only. |
Roadmap
A sample plan for this demo, not a promise of mainnet features.
- DoneBrowser wallet and practice miner
Create a phrase, lock it with a password, and watch a reward mature.
- DoneExplorer and bridge
Search the simulated chain, and move dollar tokens in and out.
- NextClearer fee receipts
Show the treasury share and the network fee on every payment before it is signed.
- LaterPhone layout polish
Keep mining controls in reach when the keyboard is open.
Security
On a real network the 24 words are the wallet. This demo stores those words in local storage so the screens can work without a server. Do not reuse a phrase that protects real coins.
- The password is checked only in this browser. It is not an account on a server.
- Log out deletes the wallet, bridge history and practice transactions from this site's storage.
- There is no scripting language in the design, which keeps payments to a short list of asset types.
- Addresses are bech32m-shaped strings beginning with hbr1. The demo does not broadcast them.
Security review
A review of a system like this looks at a few places:
- Whether the phrase can leave the device. Here it cannot, because there is no network call.
- Whether a payment can be changed after you confirm the amount, asset and address. The demo applies exactly the numbers on the confirmation form.
- Whether a reward can be spent before it matures. Spendable HBR and maturing HBR are kept apart until the unlock height.
- Whether the treasury share is hidden. From block 300 the explorer shows the 0.50 HBR treasury line on each block.
Treat every figure on this site as a picture of those rules, useful for clicking through the product, not as a balance you can withdraw.