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# Hush Smart Chains - The z2z Platform
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Hush Smart Chains are a way to create Zcash Protocol Proof-of-Work chains, with a focus on fully-shielded (z2z) chains for
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maximum privacy.
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## Creating a Hush Smart Chain
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You will need the [Official Hush full node Git repo](https://git.hush.is/hush/hush3) :
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```
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git clone https://git.hush.is/hush/hush3.git
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cd hush3
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./build.sh -j4 # uses 4 cores
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cd src
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```
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As an example, we will make a replica of the cryptocoin Pirate (ARRR) in a single command:
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```
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hush-smart-chain -ac_name=ARRRUKIDDING \
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-ac_supply=0 -ac_halving=388885 -ac_private=1 \
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-ac_reward=25600000000 -addnode=45.76.84.111
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```
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This replica has exactly the same mining schedule as PIRATE as well as block reward. One notable exception
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is that all Hush Smart Chains are Pure Sapling, which means no 1.6GB download would be required to sync
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the `ARRRUKIDDING` chain.
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One may note that the halving interval looks different than the 77777 that Pirate normally uses. This was
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the halving interval of the original Pirate chain, which the author mined on, but would have lead to all
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mining rewards being emitted in about 5 years. Komodo internally multiplies the interval by 5 to give a
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~25 year emission and that is where 3888885 comes from.
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## Private vs Public Hush Smart Chains
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Private Hush Smart Chains are perfect for a group of people who want to use encrypted memos but do not want their
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data on the public Hush mainnet. It allows groups to completely isolate their data, yet still use HUSH technology.
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Public Hush Smart Chains would be good for public Hushlists, i.e. a publicly known mailing list that you subscribe to
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and receive messages. They could also be used to launch new Zcash Protocol coins upon our z2z platform.
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## Adding DPoW
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All Hush Smart Chains support Delayed-Proof-of-Work innately, though the service must be run and data injected into the network.
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DPoW is not needed for private Hush Smart Chain. Public Smart Chains that will have financial value need protection
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from double spend attacks, so DPoW is highly encouraged.
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## Getting Help
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We are happy to help you build upon the Hush platform, please join our [Telegram](https://www.hush.is/telegram/)
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