Release v6.0.4

The latest desktop app contains the latest firmware and provides step-by-step instructions for upgrading. To get the latest desktop app, click here.

Release notes:

• Bugfix for Electrum multisig

To reproduce and verify the deterministic build:

# Clone the repository
git clone https://github.com/digitalbitbox/mcu.git
cd mcu

# Build deterministically (requires Vagrant and Virtualbox and OSX or Linux)
vagrant up
cp build-vagrant/bin/firmware.pad.bin firmware.deterministic.6.0.4.bin
vagrant halt

# Verify the deterministic binary
shasum -a 256 firmware.deterministic.6.0.4.bin  #  b466cee3544e4caaf00ddcb49993f1360b247cc799b1c6977ab1764e37053645

# Append signatures of the firmware
py/prepend_signatures_firmware_binary.py firmware.deterministic.6.0.4.bin firmware.deterministic.6.0.4.signed.bin 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

# Verify the signed deterministic binary
shasum -a 256 firmware.deterministic.6.0.4.signed.bin  #  58974bd1cd38adb1e99ca962628bde0ab074ea0f608ba1d070e760817ee7a29b

# Signed deterministic binaries can be loaded into the Digital Bitbox
# using the Upgrade Firmware button in the desktop app.

# In case of problems, check if using a different major version:
vagrant --version  #  Vagrant 1.8.5
vagrant box list   #  ubuntu/trusty64 (virtualbox, 20181103.0.0)
virtualbox --help  #  Oracle VM VirtualBox Manager 5.1.38

ECC secp256k1 public keys and signatures of the double SHA256 hash of firmware.deterministic.6.0.4.bin:

0263b742d9873405c609814da884324ab0f4c1597a5fd152b388899857f4d041df : 94a319fa4e208a3703615ab1a1d5b91c0c60fa06ce11cf1f3b95715231ce05c266fb7b92ffda64e7781152048ba5f24350eb886d2bb2ad203aa268584e531a9b
02b95dc22d293376222ef896f74a8436a8b6672e7e416299f3c4e23b49c38ad366 : a8f80f6d85a8d2f88d552a6543949f949eccd360449b0a81f8065c38a3aa163d67c6254078114f85d910062fc8e51c20e461a1c4219c6911dfb2d5242b39c739
03ef4c48dc308ace971c025db3edd4bc5d5110e28e14bdd925fffafd4d21002800 : 30f12c64b516380ab1adaceb4f3f4008b003ce6c3d0f51cfe4509990b568c9c5252748099a95d0b2127ccb7b3c92c9b19fc32a26df100761fe0aacb52233afb7
030d8b0b86fca70bfd3a8d842cdb3ff8362c02f455fd092b080f1bb137dfc1d25f : 34f59a71d7d46c22439700804cf02898f7e9c592f8c3c3c533da234e04201be2112dd33c0574eb1befeda3ea70d6a5c4690bcbc7ea02a38fd67427f8ceab1d4f

Signature blob appended to firmware.deterministic.6.0.4.bin

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