Generate a piece of artwork from nature's energy by blockchain.

HACD is not like other on-chain generative arts. HACD consumes energy by running Proof-of-work algorithm. It generates specific diamond images by machine. The generation process is random and cannot predict in advance.

Generating HACD is the similar as mining Bitcoin, which requires only a personal computer at the beginning. However, HACD gets harder to generate as the mining difficulty increases. This is when higher performance GPU machines are needed to mine it.

HACD is not generated using a smart contract. It is a string of data generated from a 32-bit hash that has compressed and calculated to meet a specific format.

Specifically, it hashes the hash value of the last block containing the HACD plus the owner's public key and a nonce number to get a 64-bit string value. It compressed into a 16-bit string value by the diamond_hash algorithm.

hash256((genesis_block_hash || prev_diamond_block_hash ) + belong_user_public_key + nonce_number) ==> length_16_string

Satisfying the first 10 bits as 0 and the last 6 bits as letters, a valid HACD is mined.

HACD is the first on-chain generative art that does not need image files to be stored and transmitted anywhere.

What is stored and transmitted is the visual gene of HACD and the visual expression algorithm. It takes up only 10 bytes, which is 1/3 the size of the transaction hash.

Any end device that needs to display HACD is processed into an SVG image by a visual gene through a visual expression algorithm.

A non-stop on-chain art auction attended by miners from all over the world.

The block time of Hacash is on average every 5 minutes. HACD goes through 5 blocks per mining and bidding session, which is about 25 minutes. Each HACD will only appear in blocks with a block height of 5 or 0.

The bidding settlement unit for HACD is another PoW coin, HAC, on the Hacash chain. 90% of the HAC will burn at the end of the bidding, and the remaining 10% will award to the miner who added the HACD to the block.

Like mining for gems in reality, you never know what the next one will look like.

Every 25 minutes, the miner who has mined a 6-letter HACD is eligible to open a blind box once. But only one miner with the highest bid gets to open his or her blind box and show what the HACD looks like.

HACD was openly launched without pre-mining or any other preallocation.

HACD is different from the vast majority of NFTs. There are no reservations or incentives in the allocation.

All HACDs are initially mined fairly through PoW and then allocated through bidding.

HACD started on May 16, 2019, and only 3.4% of the total has been mined in over 3 years.

The total number of HACDs is close to the number of bitcoins, over 16 million. And only a maximum of 57 HACDs can be generated per day. so everyone has a chance to take part in mining and bidding for the next HACD.

Also, the Proof-of-work can cause people to worry about HACD will be monopolized by big hashing power. But, HACD's on-chain bidding can prevent a situation where all the HACD is taken away by the big miners or NFT bots.

Imagine what would happen if the difficulty of mining a bitcoin only went up.

But, there is a mining difficulty setting in HACD. For every 3277 HACDs, the difficulty goes up by a percentage. This difficulty will eventually surpass the bitcoin whole network mining difficulty.

In other words, all the energy on the planet at that point will not be enough to mine a single HACD.

This design controls the output of the HACD. When there is no longer a demand for HACD in the market, no one will spend a lot of power and machine costs to generate HACD.

Even without the difficulty setting, 16,777,216 HACDs would have taken 800 years to complete. By the end of the 21st century, also only less than 1.7 million HACDs could be generated.

HACD has numerous scarcity evaluation dimensions, with new ones being discovered all the time. Some of these dimensions were recognized from the beginning, such as consecutive numbers and numbers with special meanings being scarcer. Additionally, letters with six identical letters and special meanings are also scarce, such as ETHMAN and MYBANK.

If the HIP-5 Diamond is used to assess its scarcity, then certain shaped HACDs, like those in type 9 sets and heart-shaped HACDs, are also scarce.

However, the highest unit price for a single HACD has come from a scarcity that was discovered midway through the market. The bottom four color blocks containing the same color of the common HACD have surpassed the price of a single bitcoin.

HACDs with the least number of individual color matches within the same group of color sets are also extremely scarce. There are numerous other combinatorial ways to play, such as going for sets and twins. Collectors from different cultural backgrounds may also discover different meanings behind the letters.

There are 16^16 possible colorways for the common HACD, making it practically impossible for them to appear identical. With more than 50,000 HACDs generated today, the scarcity play is extremely rich and unpredictable.

HACD can be traded on the NFT marketplace, DEX and CEX.

HACD is unlike other NFTs that can only be traded on NFT marketplaces. Although every HACD piece is special. Due to its generation mechanism, most common HACDs are worth the same to collectors.

HACD is technically can be traded in bulk on centralized exchanges such as Binance. And it can be added any trading pairs.

Technical doc: https://github.com/hacash/service/blob/master/doc/rpc_api_doc.en.md

HACD is your private bank.

A HACD can lend HAC on Hacash to enhance the liquidity of HAC. Returning the HAC will burn a certain amount of interest, making the HAC a deflationary asset.

Details can be found at https://github.com/hacash/paper/blob/master/HIP/lending/lending_standard_specification.en.md

Your collection, your identity, your brand.

A HACD is not like an ENS, but it can assume the functions of a DNS. This is because each HACD has a unique address that owns it.

Where an address needs to be entered at the application layer, just enter the six letters of the HACD and it will be automatically resolved to the address that owns the HACD. Similar to a .com domain name automatically resolving to an IP.

It will become Hacash's personal identity(DID), enhancing the collectability value of the HACD.

Besides, each HACD has a unqiue six letter that is earlier than the Text-based NFT Loot.