Lab
13 ways to touch
Bitcoin with your hands
Every tool from the lessons. Hashes and signatures are computed for real in this browser; block data comes live from the Mobick explorer. Keys made here are for practice and never leave the page.
A real on-chain tool MobickVault — self lock-up by your own hand → Lock BMB so not even you can move it for a set period, then unlock with your paper-wallet key. Old mobickvault.com vaults unlock here too. A real on-chain tool Mobick Guard — flow tracing and P2P seller protection → Follow where coins came from and went (Mobick mainnet and WBMB) and check mined origin. For P2P sellers: what to check yourself before accepting a payment, and the procedure and evidence to keep if your account is frozen. Practice on familiar screens Transfer practice — rehearse on exchange, wallet and Uniswap screens → Match network, address, tag and recipient on practice screens modelled on real exchanges and wallets. No money, no accounts; nothing you type leaves the page.Hash lab
Change one character and watch half the bits flip
Hash (64 hex digits)
Change one character and roughly half — about 128 — flip. That is why the output gives away nothing about the input.
Browser miner
Real SHA-256d proof of work in your browser
Block contents (example)
#60,962 | prev 00000000000001df…de5c32c4 | 1 tx nonce
0
Best hash so far
— - Tries
- 0
- My browser
- —
- Elapsed
- 0.0s
Pick a difficulty and press Start. Each extra zero takes about 16 times longer on average.
Retarget gauge
Mobick’s current 2,016-block epoch, live
Mobick mainnet · current difficulty epoch
LIVE- Epoch progress
- —
- Avg block time this epoch
- —
- Projected difficulty
- —
- Next retarget in
- —
Tamper with the ledger
Change one block and everything after breaks
Change a single character in the second block’s data.
Double-spend experiment
Send the same coin twice and watch the network split
Press ①. One person sends the same coin to Minsu and Jieun at once. Each node keeps whichever it hears first and drops the other.
Private key → address
Four one-way steps
- 1Private key
A random 256-bit number. Whoever knows it owns the coins.
— - 2Public key
Private key × a point on the elliptic curve. Easy to multiply, impossible to divide back.
— - 3Public-key hash
SHA-256, then RIPEMD-160 — 20 bytes.
— - 4Address
A friendly wrapper. Mobick uses the same bc1… / 1… formats as Bitcoin.
——
The arrows only point one way. You cannot get from an address back to the public key, or from a public key back to the private key — so share addresses freely and never share private keys.
Sign and verify
Sign with a private key, verify with the public key
① Me — sign with my private key
Private key—
② Anyone — verify with the public key
Signature—
Public key—
You can also edit the received message yourself. The signature is bound to the whole message — change a single space and verification fails. Making a signature needs the private key; checking it needs only the public key.
UTXO playground
Pick coins, build a transaction, get change
My UTXOs — tap to pick
Balance = sum of the coins 0
Transaction
- Inputs
- 0
- Send
- 0
- Fee
- 0.0001
- Change
- —
New outputs
Paper wallet anatomy
Scratch, sweep, peel
BTCMobick PAPER WALLET
100 BMB
Address (public)—
Private key — do not scratch
— ↖ Rub with a finger or mouse to scratch
- 1Front: address
Anyone can check the balance from the address. It is safe to show.
- 2Back: scratch
Scratching reveals the private key. From now on, anyone who sees this paper can move the coins.
- 3Sweep
A wallet app reads the key and sends the whole balance to a new address of yours.
- 4Spent paper
Never reuse a swept paper wallet. Keep it only as a keepsake.
Early 2023 airdrop wallets had four layers: peel the first with a blade and the key shows without scratching, then the layer can be stuck back unnoticed (live stream, 4 Oct 2025). That is why buying or selling a loaded paper wallet as an object is risky — a previous holder may already have seen the key.
A practice paper wallet. Its key exists only in this browser and holds no real coins.
Count confirmations
Real blocks until an LBank deposit clears
Tip height—
- 0Sent · waiting in the mempool
- 11 confirmation · in a block, shown on LBank
- 22 confirmations · LBank credits it
- 33+ · ever harder to reverse
This counts real Mobick mainnet blocks. Press the button and every new block adds one confirmation. One block takes about 10 minutes, so two confirmations take roughly 20.
Read blocks #0 and #1
Decode the new mainnet’s coinbases yourself
coinbase scriptSig (hex)
— As text
—
coinbase scriptSig (hex)
— As text
—
Council price simulator
How a trimmed mean resists manipulation
- Plain mean
- —
- Council price (middle 80%)
- —
- Discarded
- 13 top · 13 bottom
Numbers are an index (base 100), not a real price. Blue dots are honest members, orange dots are trying to push the price, faded dots are discarded.
MOVN payout formula
The 10-Mo bonus curve and the 5× reserve
- Band · rate
- —
- Base MOVN
- —
- Bonus MOVN
- —
- Total MOVN
- —
MOVN reserve — if BMB falls below the deposit price
Computed with the formula published on harvest-movn.com. The exchange price is the council price at the time; returns are not guaranteed and losses are possible. This shows how the formula works and is not a recommendation.