zecpaperwallet is a Zcash Sapling paper wallet generator that can run completely offline. You can run it on an air-gapped computer to generate your shielded z-addresses, which will allow you to keep your keys completely offline.
zecpaperwallet-cli is built with rust. To compile from source, you install Rust. Basically, you need to:
curl https://sh.rustup.rs -sSf | sh
Chekout the zecpaperwallet repository and build the CLI
git clone https://github.com/adityapk00/zecpaperwallet.git
cd zecpaperwallet/cli
cargo build --release
To generate a zcash paper wallet, simply run
./target/release/zecpaperwallet
You'll be asked to type some random characters that will add entropy to the random number generator.
To generate a zcash paper wallet and save it as a PDF, run
./target/release/zecpaperwallet -z 3 --format pdf zecpaper-output.pdf
This will generate 3 shielded z-addresses and their corresponding private keys, and save them in a PDF file called zecpaper-output.pdf
If you are running a newish version of Linux, you can be doubly sure that the process is not contacting the network by running zecpaperwallet without the network namespace.
sudo unshare -n ./target/release/zecpaperwallet
unshare -n runs the process without a network interface which means you can be sure that your data is not being sent across the network.
USAGE:
zecpaperwallet [FLAGS] [OPTIONS] [output]
FLAGS:
-e, --entropy Provide additional entropy to the random number generator. Any random string, containing 32-64
characters
-h, --help Prints help information
-n, --nohd Don't reuse HD keys. Normally, zecpaperwallet will use the same HD key to derive multiple
addresses. This flag will use a new seed for each address
-t, --testnet Generate Testnet addresses
-V, --version Prints version information
OPTIONS:
-f, --format <FORMAT> What format to generate the output in [default: json] [possible values: pdf, json]
-z, --zaddrs <z_addresses> Number of Z addresses (Sapling) to generate [default: 1]
ARGS:
<output> Name of output file.
