Hushlist: Censorship Resistant Metadata-Minimizing Multi-Blockchain Communication

Hushlist uses the Hush cryptocoin blockchain, as well as other Zcash-fork privacy coin blockchains to implement mailing-list style communication which inherit all of the beautiful properties that Hush inherits from Bitcoin and Zcash.

Requirements

Hushlist requires a computer with Perl 5.8+, and access to a Hush fullnode RPC server which is often run on localhost. Hushlist supports all platforms that Hush currently supports, which is Linux, Mac and Windows.

Sending shielded transactions (involving zaddrs) can be very resource intensive, and at least 4GB of RAM is recommended, although 2GB may work on some newer versions and platforms.

Supported Blockchains

HUSH
TUSH (HUSH testnet)
Zcash (ZEC)
TAZ (ZEC testnet)
Komodo (KMD) - planned

Examples

# create a new Hush contact
hushlist contact add alice z1234...
hushlist contact add bob z1456....

# see an overview of your local Hushlists
hushlist status

# create a new private Hushlist, which exists locally only
# and has no cost associated, since nothing is sent to the blockchain
hushlist new listname

# see the status of a list
hushlist status listname
hushlist add listname alice bob
hushlist send listname "A beginning is the time for taking the most delicate care that the balances are correct."

# send using a non-default chain
hushlist send listname --chain tush "If wishes were fishes, we'd all cast nets. -- Stilgar"

# show overview of lists and messages
hushlist log

# show most recent messages for listname
hushlist log listname

# donate 5 HUSH to the nice dev Duke Leto who write this software
hushlist donate 5 hush

In development commands

This will rely on z_embedstring RPC which will hopefully be in the Hush 1.0.13 release, it is currently in the z_embedstring branch:

# make an already created private hushlist PUBLIC, i.e.
# publish it's privkey to the blockchain. This costs HUSH, since
# we need to send an xtn to the blockchain
hushlist public listname

How Is This Different Than Hush Messenger?

Hush Messenger has similar functions, but it more closely maps to "chat program" versus "mailing list software". Messenger also has a different tech stack (Javascript) and runs in the browser while Hushlist avoids the convenience of browsers to reduce it's attack surface.

License

GPLv3

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