SeedHammer

Second generation engraving machine for bitcoin backups.

Nostr: npub1z072s0nvldeva7a6qek3kj358f0h5gm640kkllkk52h0qrjtnw8q38wfm4

[SeedHammer @SeedHammer]

Preorder customers 📦

Shipping is underway again and orders are going out first-in, first-out.

Keep an eye on your inbox 👀
we’ll email you as soon as your order is ready to ship.

[SeedHammer @SeedHammer]

While we’re working out our international shipping issues (e.g. "is there Russian steel in your plates?"), we’re sending out as many orders as possible to Switzerland.
DM us your order number if you are willing to receive your order in Switzerland!

[SeedHammer @SeedHammer]

@ckpooldev We are working on it!

[SeedHammer @SeedHammer]

@philip_dath We’re carefully shipping to other countries.

[SeedHammer @SeedHammer]

Merry Christmas!
Preorder shipments to the EU and USA are temporarily paused due to customs return issues. Short term we’re using workarounds; long term we’re relocating production to a more shipping-friendly country.

[SeedHammer @SeedHammer]

@Toresh4096 Not at the moment; however, this may change once we move our production.

[SeedHammer @SeedHammer]

We are finally shipping!

Everyone that ordered on or before December 22 should have received an email with instructions.

We are shipping from Switzerland and have postponed US shipping until the tariffs issue settle.

[SeedHammer @SeedHammer]

@sesi_the_man @ozsats256 @asanoha_gold @BitsagaRob The microcontroller is a Raspberry Pi rp2350

[SeedHammer @SeedHammer]

@ozsats256 @asanoha_gold @BitsagaRob Yes! The whole design is open-source. You can use the schematics as-is or edit them in KiCad, then have the board made at a PCB factory (we use JLCPCB).

[SeedHammer @SeedHammer]

After more than a year of iterative design and testing, our electronics have progressed through multiple PCB revisions - evolving from the @Raspberry_Pi Pico 1 to a fully custom design built around the RP2350 chip, designed with @kicad_pcb and manufactured by @JLCPCB.

[SeedHammer @SeedHammer]

Shipping status:

- We are assembling additional machines for the upcoming shipment batch.
- We are investigating defective hammerheads supplied by the factory.
- We’re also working on CE certification to get through EU customs.

[SeedHammer @SeedHammer]

@NostrIsBetter That will happen once we’re out of the beta phase - when all major bugs are fixed and the interface is more intuitive.

[SeedHammer @SeedHammer]

Now on or before February 2.

[SeedHammer @SeedHammer]

Now on or before January 5. Note that we are still working on making US shipping available.

[SeedHammer @SeedHammer]

@NostrIsBetter At the moment, we’re not able to give an exact shipping dates. We’re fulfilling orders on a first-in, first-out basis. Since shipments have only just begun, we still need to see how the process is before we can provide a more accurate timeline.

[SeedHammer @SeedHammer]

@orcitis @BitsagaRob We don't have plans to backport features to the first machine.

[SeedHammer @SeedHammer]

We're big fans of codex32 at SeedHammer. Hand-computable, built in Shamir's secret splitting and fixes several shortcomings in BIP39 (Ctrl-F "trainwreck" in https://t.co/y2nBu063ov.

The SeedHammer machine may be the first hardware to support codex32. Below is the engraving of 2 codex32 Shamir shares that combine to a master secret.

We also wrote a command line utility and library for manipulating codex32 shares and derive BIP85 data. See https://t.co/K3pXryENIW (press "Run" to see output) or use a terminal (you need Go installed):

Install the `biptool` command line tool:
$ go install https://t.co/ySujQDX2oD
$ export PATH=$PATH:~/go/bin

Encode a secret with threshold 2. Usually a random key, but in our case a sentence:
$ echo "Codex32 is what we do"| biptool seed -seedlen 22 -id secr -threshold 2
ms12secrsgdhkgetcxvezq6tnypmksct5ypmk2grydu9qqd7chr26ruhsn

Encode share #1:
$ head -c 22 /dev/urandom | biptool seed -seedlen 22 -id secr -threshold 2 -idx a
ms12secras2eph54xt3tkzjhrnp8g8k2zpaq5rrgqzu2sfvvug3l4xxqqc

Derive share #2:
$ biptool interpolate -idx c
# Enter the secret share and share #1, finish with Ctrl-D
ms12secrsgdhkgetcxvezq6tnypmksct5ypmk2grydu9qqd7chr26ruhsn
ms12secras2eph54xt3tkzjhrnp8g8k2zpaq5rrgqzu2sfvvug3l4xxqqc
<Ctrl-D>
ms12secrca5vwy33zw9af9w5jupyvgra6c7ang0ywqugpzm6jm8hhlv035

Now you have two Shamir shares for your secret. Combine them to extract the secret:
$ biptool derive seed
# Enter share #1 and #2, finish with Ctrl-D
ms12secras2eph54xt3tkzjhrnp8g8k2zpaq5rrgqzu2sfvvug3l4xxqqc
ms12secrca5vwy33zw9af9w5jupyvgra6c7ang0ywqugpzm6jm8hhlv035
<Ctrl-D>
Codex32 is what we do

Don't have a terminal? Play along in the browser: https://t.co/K3pXryENIW . Edit the program, press "Run" and see output below the code box.

#SatHunterz

[SeedHammer @SeedHammer]

We’re getting 16 units ready to ship to the warehouse.
The EU → rest-of-world process is still being finalized.

US customers have to wait while tariff systems settle.
We’ll post shipping prices on our website and start sending individual orders as soon as possible.

[SeedHammer @SeedHammer]

We are delaying shipping.

Due to the exorbitant Switzerland/US tariff and high shipping rates, we’re investigating shipping from the EU instead.

Thank you very much for your patience.

[SeedHammer @SeedHammer]

We're raising the price of the SeedHammer II machine soon. If you're still on the fence, act now to get a machine at the pre-order price.

We had hoped to keep the current price after the pre-order phase, but it's now clear to us that we need to work on raising sales volume first.

[SeedHammer @SeedHammer]

@BitsagaRob Of course. BIP39 remains the standard and what we expect most of our users will need. Codex32 is in addition to BIP39, just like SLIP39 will be.