HASHRABBITOPEN MINER

HASHRABBIT DOCS

PROOF OF WORK
MINTING GUIDE

HASHRABBIT is an ERC-721 collection of 3,333 pieces on Robinhood Chain. A mint is earned by finding a valid Keccak-256 proof, then submitting that proof from the same wallet address.

NETWORKRobinhood Chain
CHAIN ID4663
SUPPLY3,333 HRBT
CONTRACT0xa420f840c3f0449de3ad6801858ccd0f0ef85c47 ↗

02 / BROWSER MINING

THE SIMPLE ROUTE

  1. Open the miner.Use Chrome or Edge on a machine with WebGPU support.
  2. Press Start Mining.The site requests MetaMask, adds Robinhood Chain if needed, then reads the live challenge.
  3. Choose GPU or CPU.GPU is recommended. Keep the tab visible and prevent the computer from sleeping.
  4. Confirm the proof.When a valid nonce is found, the site opens the mint transaction in the connected wallet automatically.

03 / RENTED & REMOTE GPU

CONNECT EXTERNAL COMPUTE

For Vast.ai, RunPod or another rented RTX machine, select an NVIDIA image with CUDA 12+, at least 8 GB VRAM, 20 GB disk and SSH access. The miner must search for the wallet that will submit the mint; a proof found for another address is invalid.

SAFER MODE

Send only your public wallet address to the rented machine. Let it return the winning nonce, then submit that nonce from your own computer. Never upload the developer wallet or seed phrase to a rented GPU.

MINER INTEGRATION SPEC

RPChttps://rpc.mainnet.chain.robinhood.com
CHAIN ID4663
READprevWork() · requiredTarget(wallet) · currentPrice()
HASH INPUTabi.encodePacked(wallet, nonce, prevWork)
VALID WHENuint256(keccak256(input)) < requiredTarget
SUBMITmine(nonce) with value = currentPrice()

Poll prevWork() continuously. Every successful network mint changes the challenge, so stale workers must stop immediately and restart. Headless miners that submit automatically should use a separate, minimally funded mint wallet—not the collection owner wallet.

04 / PRICE EPOCHS

MINT PRICE SCHEDULE

Mint #1 starts at 0.0012 ETH plus network gas. There is no free allocation. The price rises by 0.0001 ETH after each group of 200 mints.

MINT RANGEPRICE
1–2000.0012 ETH
201–4000.0013 ETH
401–6000.0014 ETH
601–8000.0015 ETH
801–1,0000.0016 ETH
1,001–1,2000.0017 ETH
1,201–1,4000.0018 ETH
1,401–1,6000.0019 ETH
1,601–1,8000.0020 ETH
1,801–2,0000.0021 ETH
2,001–2,2000.0022 ETH
2,201–2,4000.0023 ETH
2,401–2,6000.0024 ETH
2,601–2,8000.0025 ETH
2,801–3,0000.0026 ETH
3,001–3,2000.0027 ETH
3,201–3,3330.0028 ETH

05 / DIFFICULTY

THREE FIXED ERAS

31 BITSMints 1–1,111
32 BITSMints 1,112–2,222
33 BITSMints 2,223–3,333

Difficulty rises by exactly one leading zero bit every 1,111 mints. Each additional bit doubles the expected hashing work.

06 / ART & METADATA

ONE UNUSED RABBIT

The contract assigns one unused metadata ID after a valid proof is accepted. Miners cannot select an image. The collection contains 3,333 pixel art files rendered in advance and matching metadata served from hashrabbits.fun.

07 / CONTRACT & SECURITY

VERIFY BEFORE YOU MINE

Always verify the domain, Robinhood Chain ID 4663 and the published contract address. Paid mint proceeds are forwarded directly to the developer recipient by the contract. No website will ever need your seed phrase.

OPEN CONTRACT ON BLOCKSCOUT ↗

08 / FAQ

QUICK ANSWERS

Why did my proof look valid but fail?

Another miner probably changed prevWork before your transaction landed, making your proof stale.

How much does a mint cost?

The first 200 mints cost 0.0012 ETH each plus gas. Every following group of 200 adds 0.0001 ETH.

Can several GPUs mine for one wallet?

Yes. Give every worker the same public wallet and different nonce ranges. Stop all workers and refresh the challenge after any successful mint.

Can I choose my rabbit?

No. The contract draws one unused metadata ID after the proof is accepted.