seedphraser

Read and writes BIP39 seed phrases. This also supports an extended version on top of the 128-bit, 160-bit, 192-bit, 224-bit and 256-bit forms. There is also long sequence support.

Installing

$ cargo install seedphraser
$ seedphraser --help

Alternatively, you may download a release from the release tab on GitHub. For example on Linux,

$ wget https://github.com/DiscordJim/seedphraser/releases/download/release/x86_64-unknown-linux-gnu
$ mv x86_64-unknown-linux-gnu seedphraser && chmod +x seedphraser

Long Sequences

A long sequence is a sequence that exceeds 256-bit. It will be padded with 256-bit chunks for simplicity. If here is an amount that is not divisible by 256-bits, then padding will be used and a @ <trim> will be appended onto the end which tells the program how many bytes to trim off the end. For instance consider,

moon topic gas diary boss siege among violin lumber expose trade obey @14

We first convert this into bytes and then can discard the last fourteen bytes.

This means that the tool can work with odd sequence lengths such as 2072.

Examples

Generate a new seed phrase of 256 bits and store it in a file named example.txt:

$ seedphraser generate -b 256 > example.txt

Read that file out and convert the output to base-64:

$ cat example.txt | seedphraser -i txt -o b64 > example.b64