firmware/unix

Coldcard Desktop Simulator

One Time Setup

make setup
make ngu-setup

Usage

make && ./simulator.py

Other Startup Flags

The default is to boot up, skip the tedious PIN entry step, and start as a functional wallet (on testnet, always with the same seed). But there are other options:

• -w => like a factory-fresh unit; no PIN, no secrets
• -l => PIN is set (12-12) but no secret yet
• -2 => enable a secondary wallet, with pin 33-33 and no secret
• -q => boot and drop into REPL; does nothing else, no setup
• -f -w => boot like a unit that hasn't left factory yet
• -p => pretend we don't know the seed words (xprv import) and so menus are different
• --ms => define a 2-of-4 multisig wallet, and start off in multisig wallet menu; cosigners are "Me", "Myself", "And I" and empty string. BIP45 path. - add --p2wsh or --wrap for the other two address types
• -s => go to the MicroSD menu at startup
• --mk2 => emulate mark2 hardware (older micro, etc), default is current-gen (mark4)
• --mk3 => emulate mark3 hardware
• --mk4 => emulate mark4 hardware
• -g => don't skip login sequence
• --addr => go to the address explorer at startup
• --xw => go to the wallet export submenu
• --paper => go to the Paper Wallet menu at startup
• --xfp F0012345 => pretend like the XFP of secret is F0012345: useful for debug of PSBT files
• --mainnet => start on mainnet instead of testnet
• --seed "art art ... food" => set the seed phrase to 24 words provided
• --metal => use USB attached Coldcard for bootrom and SE features
• --metal --sflash => copy SPI flash contents at boot time from real device (no writeback)
• --nick Name => set the pre-login nickname for the Coldcard so it will be shown
• --delay X => set the "login countdown" value to X minutes, also force login
• --set key=val => preset the setting 'key' to be 'val'
• --msg => jump to message signing from SD card menu item
• --hsm => enable existing HSM policy
• --users => preset a few users: "totp", "hotp" and "pw"
• --user-mgmt => go to the User Management menu inside settings
• --pin 123456-123456 => set PIN code to indicated value
• --deriv => go to the Derive Entropy menu inside settings, also loads XPRV from BIP
• --secret 01abababab... => directly set contents of SE secret, see SecretStash.encode()
• --eject => pretend no (simulated) SD Card is inserted
• --eff => (mk4) wipe setttings at startup, use simulator defaults
• --seq 1234yx34 => after start, enter those keypresses to get you to some submenu

See variant/sim_settings.py for the details of settings-related options.

Requirements

• uses good olde xterm for console input and output
• this directory has additional requirements.txt (a superset of other requirements of the project)
• run "brew install sdl2" before/after doing python requirements
• run "make setup" then "make"
• then "./simulator.py"

MacOS building

• Follow instructions on https://github.com/micropython/micropython

• probably: brew install libffi if not already present

• to get pkg-config libffi to output useful things, need this:

  setenv PKG_CONFIG_PATH /usr/local/opt/libffi/lib/pkgconfig

• but that's in the Makefile now

Other OS

• sorry we haven't gotten around to that yet, but certainly would be possible to build this on Linux or FreeBSD... but not Windows.