              ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
               SLIP-39 WALLET "SEED" GENERATION & BACKUP

                             Perry Kundert
              ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━


                          2021-12-20 10:55:00


Creating Ethereum, Bitcoin and other accounts is complex and fraught
with potential for loss of funds.

A 12- or 24-word BIP-39 seed recovery Mmnemonic Phrase helps, but a
*single* lapse in security dooms the account (and all derived accounts,
in fact).  If someone finds your recovery phrase (or you lose it), the
accounts derived from that seed are /gone/.

The SLIP-39 standard allows you to split the seed between 1, 2, or more
groups of several mnemonic recovery phrases.  This is better, but
creating such accounts is difficult; presently, only the Trezor supports
these directly, and they can only be created "manually".  Writing down 5
or more sets of 20 words is difficult, error-prone and time consuming.

Table of Contents
─────────────────

1. Hardware Wallet "Seed" Configuration
2. Security with Availability
.. 1. Shamir's Secret Sharing System (SSSS)
3. SLIP-39 Account Creation, Recovery and Generation
.. 1. Creating New SLIP-39 Recoverable Seeds
..... 1. Paper Wallets
..... 2. Supported Cryptocurrencies
.. 2. The macOS/win32 `SLIP-39.app' GUI App
.. 3. The Python `slip39' CLI
..... 1. `slip39' Synopsis
.. 4. Recovery & Re-Creation
..... 1. `slip39.recovery' Synopsis
..... 2. Pipelining `slip39.recovery | slip39 --secret -'
..... 3. Pipelining Backup of a BIP-39 Mnemonic Phrase
.. 5. Generation of Addresses
..... 1. `slip39-generator' Synopsis
..... 2. Producing Addresses
..... 3. X Public Keys
..... 4. Serial Port Connected Secure Seed Enclave
.. 6. The `slip39' module API
..... 1. `slip39.create'
..... 2. `slip39.produce_pdf'
..... 3. `slip39.write_pdfs'
..... 4. `slip39.recover'
..... 5. `slip39.recover_bip39'
..... 6. `slip39.produce_bip39'
4. Conversion from BIP-39 to SLIP-39
.. 1. BIP-39 vs. SLIP-39 Incompatibility
..... 1. BIP-39 Entropy to Mnemonic
..... 2. BIP-39 Mnemonic to Seed
..... 3. BIP-39 Seed to Address
..... 4. SLIP-39 Entropy to Mnemonic
..... 5. SLIP-39 Mnemonic to Seed
..... 6. SLIP-39 Seed to Address
.. 2. BIP-39 vs SLIP-39 Key Derivation Summary
.. 3. BIP-39 Backup via SLIP-39
..... 1. Emergency Recovery: Using Recovered Paper Wallets
..... 2. Best Recovery: Using Recovered BIP-39 Mnemonic Phrase
5. Building & Installing
.. 1. The `slip39' Module
.. 2. The `slip39' GUI
..... 1. The macOS/win32 `SLIP-39.app' GUI
..... 2. The Windows 10 `SLIP-39' GUI
6. Licensing
.. 1. Create an Ed25519 "Agent" Key
.. 2. Validating an Advanced Feature License
..... 1. Get a sub-license From Your "master" License
..... 2. Obtaining an Advanced Feature "master" License
7. Dependencies
.. 1. The `python-shamir-mnemonic' API


1 Hardware Wallet "Seed" Configuration
══════════════════════════════════════

        Your keys, your Bitcoin.  Not your keys, not your Bitcoin.

        —Andreas Antonopoulos

  The [python-slip39] project (and the [SLIP-39 macOS/win32 App]) exists
  to assist in the safe creation, backup and documentation of
  [Hierarchical Deterministic (HD) Wallet] seeds and derived accounts,
  with various SLIP-39 sharing parameters.  It generates the new random
  wallet seed, and generates the expected standard Ethereum account(s)
  (at [derivation path] *m/44'/60'/0'/0/0* by default) and Bitcoin
  accounts (at Bech32 derivation path *m/84'/0'/0'/0/0* by default),
  with wallet address and QR code (compatible with Trezor and Ledger
  derivations).  It produces the required SLIP-39 phrases, and outputs a
  single PDF containing all the required printable cards to document the
  seed (and the specified derived accounts).

  On an secure (ideally air-gapped) computer, new seeds can /safely/ be
  generated (*without trusting this program*) and the PDF saved to a USB
  drive for printing (or directly printed without the file being saved
  to disk.).  Presently, `slip39' can output example ETH, BTC, LTC,
  DOGE, BNB, CRO and XRP addresses derived from the seed, to
  /illustrate/ what accounts are associated with the backed-up seed.
  Recovery of the seed to a [Trezor "Model T"] is simple, by entering
  the mnemonics right on the device.

  We also support the backup of existing insecure and unreliable 12- or
  24-word BIP-39 Mnemonic Phrases as SLIP-39 Mnemonic cards, for
  existing BIP-39 hardware wallets like the [Ledger Nano], etc.!
  Recover from your existing BIP-39 Seed Phrase Mnemonic, select "Using
  BIP-39" (and enter your BIP-39 passphrase), and generate a set of
  SLIP-39 Mnemonic cards.  Later, use the SLIP-39 App to recover from
  your SLIP-39 Mnemonic cards, click "Using BIP-39" to get your BIP-39
  Mnemonic back, and use it (and your passphrase) to recover your
  accounts to your Ledger (or other) hardware wallet.

  Output of BIP-38 or JSON encrypted Paper Wallets is also supported,
  for import into standard software cryptocurrency wallets.

  <./images/slip39.png>


[python-slip39] <https://github.com/pjkundert/python-slip39.git>

[SLIP-39 macOS/win32 App] <https://slip39.com/app>

[Hierarchical Deterministic (HD) Wallet]
<https://wolovim.medium.com/ethereum-201-hd-wallets-11d0c93c87>

[derivation path]
<https://medium.com/myetherwallet/hd-wallets-and-derivation-paths-explained-865a643c7bf2>

[Trezor "Model T"] <https://trezor.go2cloud.org/SH1Y>

[Ledger Nano]
<https://shop.ledger.com/pages/ledger-nano-x?r=2cd1cb6ae51f>


2 Security with Availability
════════════════════════════

  For both BIP-39 and SLIP-39, a 128- or 256-bit random "seed" is the
  source of an unlimited sequence of Ethereum and Bitcoin Heirarchical
  Deterministic (HD) derived Wallet accounts.  Anyone who can obtain
  this seed gains control of all Ethereum, Bitcoin (and other) accounts
  derived from it, so it must be securely stored.

  Losing this seed means that all of the HD Wallet accounts are
  permanently lost.  It must be /both/ backed up securely, /and/ be
  readily accessible.

  Therefore, we must:

  • Ensure that nobody untrustworthy can recover the seed, but
  • Store the seed in many places, probably with several (some perhaps
    untrustworthy) people.

  How can we address these conflicting requirements?


2.1 Shamir's Secret Sharing System (SSSS)
─────────────────────────────────────────

  [Satoshi Lab's (Trezor) SLIP-39] uses SSSS to distribute the ability
  to recover the key to 1 or more "groups".  Collecting the mnemonics
  from the required number of groups allows recovery of the seed.

  For BIP-39, the number of groups is always 1, and the number of
  mnemonics required for that group is always 1.  This selection is both
  insecure (easy to accidentally disclose) and unreliable (easy to
  accidentally lose), but since most hardware wallets *only* accept
  BIP-39 phrases, we also provide a way to /backup your BIP-39 phrase/
  using SLIP-39!

  For SLIP-39, you specify a "group_threshold" of /how many/ of your
  groups must be successfully collected, to recover the seed; this seed
  is (conceptually) split between 1 or more groups (though not in
  reality – each group's data /alone/ gives away /no information/ about
  the seed).

  For example, you might have First, Second, Fam and Frens groups, and
  decide that any 2 groups can be combined to recover the seed.  Each
  group has members with varying levels of trust and persistence, so
  have different number of Members, and differing numbers Required to
  recover that group's data:

  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   Group   Required     Members  Description                           
  ─────────────────────────────────────────────────────────────────────
   First          1  /  1        Stored at home                        
   Second         1  /  1        Stored in office safe                 
   Fam            2  /  4        Distributed to family members         
   Frens          3  /  6        Distributed to friends and associates 
  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
  The account owner might store their First and Second group data in
  their home and office safes.  These are 1/1 groups (1 required, and
  only 1 member, so each of these are 1-card groups.)

  If the Seed needs to be recovered, collecting the First and Second
  cards from the home and office safe is sufficient to recover the Seed,
  and re-generate all of the HD Wallet accounts.

  Only 2 Fam group member's cards must be collected to recover the Fam
  group's data.  So, if the HD Wallet owner loses their home (and the
  one and only First group card) in a fire, they could get the one
  Second group card from the office safe, and also 2 cards from Fam
  group members, and recover the Seed and all of their wallets.

  If catastrophe strikes and the wallet owner dies, and the heirs don't
  have access to either the First (at home) or Second (at the office)
  cards, they can collect 2 Fam cards and 3 Frens cards (at the funeral,
  for example), completing the Fam and Frens groups' data, and recover
  the Seed, and all derived HD Wallet accounts.

  Since Frens are less likely to persist long term, we'll produce more
  (6) of these cards.  Depending on how trustworthy the group is, adjust
  the Fren group's Required number higher (less trustworthy, more likely
  to know each-other, need to collect more to recover the group), or
  lower (more trustworthy, less likely to collude, need less to
  recover).


[Satoshi Lab's (Trezor) SLIP-39]
<https://github.com/satoshilabs/slips/blob/master/slip-0039.md>


3 SLIP-39 Account Creation, Recovery and Generation
═══════════════════════════════════════════════════

  Generating a new SLIP-39 encoded Seed is easy, with results available
  as PDF and text.  Any number of derived HD wallet account addresses
  can be generated from this Seed, and the Seed (and all derived HD
  wallets, for all cryptocurrencies) can be recovered by collecting the
  desired groups of recover card phrases.  The default recovery groups
  are as described above.


3.1 Creating New SLIP-39 Recoverable Seeds
──────────────────────────────────────────

  This is what the first page of the output SLIP-39 mnemonic cards PDF
  looks like:

  <./images/slip39-cards.png>

  Run the following to obtain a PDF file containing business cards with
  the default SLIP-39 groups for a new account Seed named "Personal";
  insert a USB drive to collect the output, and run:

  ┌────
  │    $ python3 -m pip install slip39        # Install slip39 in Python3
  │    $ cd /Volumes/USBDRIVE/                # Change current directory to USB
  │    $ python3 -m slip39 Personal           # Or just run "slip39 Personal"
  │    2021-12-25 11:10:38 slip39           ETH m/44'/60'/0'/0/0    : 0xb44A2011A99596671d5952CdC22816089f142FB3
  │    2021-12-25 11:10:38 slip39           Wrote SLIP-39-encoded wallet for 'Personal' to:\
  │      Personal-2021-12-22+15.45.36-0xb44A2011A99596671d5952CdC22816089f142FB3.pdf
  └────
  The resultant PDF will be output into the designated file.

  This PDF file contains business card sized SLIP-39 Mnemonic cards, and
  will print on a single page of 8-1/2"x11" paper or card stock, and the
  cards can be cut out (`--card index', `credit', `half' (page), `third'
  and `quarter' are also available, as well as 4x6 `photo' and custom
  `"(<h>,<w>),<margin>"').

  To get the data printed on the terminal as in this example (so you
  could write it down on cards instead), add a `-v' (to see it logged in
  a tabular format), or `--text' to have it printed to stdout in full
  lines (ie. for pipelining to other programs).


3.1.1 Paper Wallets
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌

  The Trezor hardware wallet natively supports the input of SLIP-39
  Mnemonics.  However, most software wallets do not (yet) support
  SLIP-39.  So, how do we load the Crypto wallets produced from our Seed
  into software wallets such as the Metamask plugin or the Brave
  browser, for example?

  The `slip39.gui' (and the macOS/win32 SLIP-39.App) support output of
  standard BIP-38 encrypted wallets for Bitcoin-like cryptocurrencies
  such as BTC, LTC and DOGE.  It also outputs encrypted Ethereum JSON
  wallets for ETH.  Here is how to produce them (from a test secret
  Seed; exclude `--secret ffff...' for yours!):

  ┌────
  │     slip39 -c ETH -c BTC -c DOGE -c LTC --secret ffffffffffffffffffffffffffffffff \
  │         --no-card --wallet password --wallet-hint 'bad:pass...' 2>&1
  └────

  ┌────
  │ 2022-11-11 08:07:24 slip39           It is recommended to not use '-s|--secret <hex>'; specify '-' to read from input
  │ 2022-11-11 08:07:24 slip39           It is recommended to not use '-w|--wallet <password>'; specify '-' to read from input
  │ 2022-11-11 08:07:24 slip39.layout    ETH    m/44'/60'/0'/0/0    : 0x824b174803e688dE39aF5B3D7Cd39bE6515A19a1
  │ 2022-11-11 08:07:24 slip39.layout    BTC    m/84'/0'/0'/0/0     : bc1q9yscq3l2yfxlvnlk3cszpqefparrv7tk24u6pl
  │ 2022-11-11 08:07:24 slip39.layout    DOGE   m/44'/3'/0'/0/0     : DN8PNN3dipSJpLmyxtGe4EJH38EhqF8Sfy
  │ 2022-11-11 08:07:24 slip39.layout    LTC    m/84'/2'/0'/0/0     : ltc1qe5m2mst9kjcqtfpapaanaty40qe8xtusmq4ake
  │ 2022-11-11 08:07:28 slip39.layout    Writing SLIP39-encoded wallet for 'SLIP39' to: SLIP39-2022-11-11+08.07.25-ETH-0x824b174803e688dE39aF5B3D7Cd39bE6515A19a1.pdf
  └────


  And what they look like:

  <./images/slip39-wallets.png>

  To recover your real SLIP-39 Seed Entropy and print wallets, use the
  SLIP-39 App's "Recover" Controls, or to do so on the command-line, use
  `slip39-recover':

  ┌────
  │     slip39-recovery -v \
  │         --mnemonic "material leaf acrobat romp charity capital omit skunk change firm eclipse crush fancy best tracks flip grownup plastic chew peanut" \
  │         --mnemonic "material leaf beard romp disaster duke flame uncover group slice guest blue gums duckling total suitable trust guitar payment platform" \
  │             2>&1
  └────

  ┌────
  │ 2022-11-11 08:07:29 slip39.recovery  Recovered 128-bit SLIP-39 Seed Entropy with 2 (all) of 2 supplied mnemonics; Seed decoded from SLIP-39 Mnemonics w/ no passphrase
  │ 2022-11-11 08:07:29 slip39.recovery  Recovered SLIP-39 secret; To re-generate SLIP-39 wallet, send it to: python3 -m slip39 --secret -
  │ ffffffffffffffffffffffffffffffff
  └────


  You can run this as a command-line pipeline.  Here, we use some
  SLIP-39 Mnemonics that encode the `ffff...' Seed Entropy; note that
  the wallets match those output above:

  ┌────
  │     slip39-recovery \
  │         --mnemonic "material leaf acrobat romp charity capital omit skunk change firm eclipse crush fancy best tracks flip grownup plastic chew peanut" \
  │         --mnemonic "material leaf beard romp disaster duke flame uncover group slice guest blue gums duckling total suitable trust guitar payment platform" \
  │     | slip39 -c ETH -c BTC -c DOGE -c LTC --secret - \
  │         --no-card --wallet password --wallet-hint 'bad:pass...' \
  │             2>&1
  └────

  ┌────
  │ 2022-11-11 08:07:29 slip39           It is recommended to not use '-w|--wallet <password>'; specify '-' to read from input
  │ 2022-11-11 08:07:29 slip39.layout    ETH    m/44'/60'/0'/0/0    : 0x824b174803e688dE39aF5B3D7Cd39bE6515A19a1
  │ 2022-11-11 08:07:29 slip39.layout    BTC    m/84'/0'/0'/0/0     : bc1q9yscq3l2yfxlvnlk3cszpqefparrv7tk24u6pl
  │ 2022-11-11 08:07:29 slip39.layout    DOGE   m/44'/3'/0'/0/0     : DN8PNN3dipSJpLmyxtGe4EJH38EhqF8Sfy
  │ 2022-11-11 08:07:29 slip39.layout    LTC    m/84'/2'/0'/0/0     : ltc1qe5m2mst9kjcqtfpapaanaty40qe8xtusmq4ake
  │ 2022-11-11 08:07:33 slip39.layout    Writing SLIP39-encoded wallet for 'SLIP39' to: SLIP39-2022-11-11+08.07.30-ETH-0x824b174803e688dE39aF5B3D7Cd39bE6515A19a1.pdf
  └────


3.1.2 Supported Cryptocurrencies
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌

  While the SLIP-39 Seed is not cryptocurrency-specific (any wallet for
  any cryptocurrency can be derived from it), each type of
  cryptocurrency has its own standard derivation path
  (eg. `m/44'/3'/0'/0/0' for DOGE), and its own address representation
  (eg. Bech32 at `m/84'/0'/0'/0/0' for BTC
  eg. `bc1qcupw7k8enymvvsa7w35j5hq4ergtvus3zk8a8s').

  When you import your SLIP-39 Seed into a Trezor, you gain access to
  all derived HD cryptocurrency wallets supported directly by that
  hardware wallet, and *indirectly*, to any coin and/or blockchain
  network supported by any wallet software (eg. Metamask).

  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   Crypto  Semantic  Path              Address  Support 
  ──────────────────────────────────────────────────────
   ETH     Legacy    m/44'/60'/0'/0/0  0x…              
   BNB     Legacy    m/44'/60'/0'/0/0  0x…      Beta    
   CRO     Bech32    m/44'/60'/0'/0/0  crc1…    Beta    
   BTC     Legacy    m/44'/ 0'/0'/0/0  1…               
           SegWit    m/44'/ 0'/0'/0/0  3…               
           Bech32    m/84'/ 0'/0'/0/0  bc1…             
   LTC     Legacy    m/44'/ 2'/0'/0/0  L…               
           SegWit    m/44'/ 2'/0'/0/0  M…               
           Bech32    m/84'/ 2'/0'/0/0  ltc1…            
   DOGE    Legacy    m/44'/ 3'/0'/0/0  D…               
  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━


◊ 3.1.2.1 ETH, BTC, LTC, DOGE

  These coins are natively supported both directly by the Trezor
  hardware wallet, and by most software wallets and "web3" platforms
  that interact with the Trezor, or can import the BIP-38 or Ethereum
  JSON Paper Wallets produced by `python-slip39'.


◊ 3.1.2.2 BNB on the Binance Smart Chain (BSC): binance.com

  The Binance Smart Chain uses standard Ethereum addresses; support for
  the BSC is added directly to the wallet software; here are the
  instructions for adding BSC support for the Trezor hardware wallet,
  [using the Metamask software wallet].  In `python-slip39', BNB is
  simply an alias for ETH, since the wallet addresses and Ethereum JSON
  Paper Wallets are identical.


  [using the Metamask software wallet]
  <https://docs.binance.org/smart-chain/wallet/trezor.html>


◊ 3.1.2.3 CRO on Cronos: crypto.com

  The Cronos chain (formerly known as the Crypto.org chain). It is the
  native chain of the [crypto.com CRO] coin.

  Cronos also uses Ethereum addresses on the `m/44'/60'/0'/0/0'
  derivation path, but represents them as Bech32 addresses with a "crc"
  prefix, eg. `crc19a6r74dvfxjyvjzf3pg9y3y5rhk6rds2c9265n'.  As with
  BNB, the wallet must support the Cronos blockchain; instructions exist
  for adding CRO support for the Trezor hardware wallet, [using the
  Metamask software wallet].


  [crypto.com CRO] <https://crypto.com>

  [using the Metamask software wallet]
  <https://cronos.org/docs/getting-started/metamask.html>


3.2 The macOS/win32 `SLIP-39.app' GUI App
─────────────────────────────────────────

  If you prefer a graphical user-interface, try the macOS/win32
  SLIP-39.App.  You can run it directly if you install Python 3.9+ from
  [python.org/downloads] or using homebrew `brew install
  python-tk@3.10'.  Then, start the GUI in a variety of ways:

  ┌────
  │    slip39-gui
  │    python3 -m slip39.gui
  └────
  Alternatively, download and install the macOS/win32 GUI App .zip, .pkg
  or .dmg installer from [github.com/pjkundert/python-slip-39/releases].


[python.org/downloads] <https://python.org/downloads>

[github.com/pjkundert/python-slip-39/releases]
<https://github.com/pjkundert/python-slip39/releases/latest>


3.3 The Python `slip39' CLI
───────────────────────────

  From the command line, you can create SLIP-39 Seed Mnemonic card PDFs.


3.3.1 `slip39' Synopsis
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌

  The full command-line argument synopsis for `slip39' is:

  ┌────
  │     slip39 --help 2>&1                | sed 's/^/: /' # (just for output formatting)
  └────

  ┌────
  │     : usage: slip39 [-h] [-v] [-q] [-o OUTPUT] [-t THRESHOLD] [-g GROUP] [-f FORMAT]
  │     :               [-c CRYPTOCURRENCY] [-p PATH] [-j JSON] [-w WALLET]
  │     :               [--wallet-hint WALLET_HINT] [--wallet-format WALLET_FORMAT]
  │     :               [-s SECRET] [--bits BITS] [--using-bip39]
  │     :               [--passphrase PASSPHRASE] [-C CARD] [--no-card] [--paper PAPER]
  │     :               [--cover] [--no-cover] [--text] [--watermark WATERMARK]
  │     :               [names ...]
  │     : 
  │     : Create and output SLIP-39 encoded Seeds and Paper Wallets to a PDF file.
  │     : 
  │     : positional arguments:
  │     :   names                 Account names to produce; if --secret Entropy is
  │     :                         supplied, only one is allowed.
  │     : 
  │     : options:
  │     :   -h, --help            show this help message and exit
  │     :   -v, --verbose         Display logging information.
  │     :   -q, --quiet           Reduce logging output.
  │     :   -o OUTPUT, --output OUTPUT
  │     :                         Output PDF to file or '-' (stdout); formatting w/
  │     :                         name, date, time, crypto, path, address allowed
  │     :   -t THRESHOLD, --threshold THRESHOLD
  │     :                         Number of groups required for recovery (default: half
  │     :                         of groups, rounded up)
  │     :   -g GROUP, --group GROUP
  │     :                         A group name[[<require>/]<size>] (default: <size> = 1,
  │     :                         <require> = half of <size>, rounded up, eg.
  │     :                         'Frens(3/5)' ).
  │     :   -f FORMAT, --format FORMAT
  │     :                         Specify crypto address formats: legacy, segwit,
  │     :                         bech32; default: ETH:legacy, BTC:bech32, LTC:bech32,
  │     :                         DOGE:legacy, CRO:bech32, BNB:legacy, XRP:legacy
  │     :   -c CRYPTOCURRENCY, --cryptocurrency CRYPTOCURRENCY
  │     :                         A crypto name and optional derivation path (eg.
  │     :                         '../<range>/<range>'); defaults: ETH:m/44'/60'/0'/0/0,
  │     :                         BTC:m/84'/0'/0'/0/0, LTC:m/84'/2'/0'/0/0,
  │     :                         DOGE:m/44'/3'/0'/0/0, CRO:m/44'/60'/0'/0/0,
  │     :                         BNB:m/44'/60'/0'/0/0, XRP:m/44'/144'/0'/0/0
  │     :   -p PATH, --path PATH  Modify all derivation paths by replacing the final
  │     :                         segment(s) w/ the supplied range(s), eg. '.../1/-'
  │     :                         means .../1/[0,...)
  │     :   -j JSON, --json JSON  Save an encrypted JSON wallet for each Ethereum
  │     :                         address w/ this password, '-' reads it from stdin
  │     :                         (default: None)
  │     :   -w WALLET, --wallet WALLET
  │     :                         Produce paper wallets in output PDF; each wallet
  │     :                         private key is encrypted this password
  │     :   --wallet-hint WALLET_HINT
  │     :                         Paper wallets password hint
  │     :   --wallet-format WALLET_FORMAT
  │     :                         Paper wallet size; half, third, quarter or
  │     :                         '(<h>,<w>),<margin>' (default: quarter)
  │     :   -s SECRET, --secret SECRET
  │     :                         Use the supplied 128-, 256- or 512-bit hex value as
  │     :                         the secret seed; '-' reads it from stdin (eg. output
  │     :                         from slip39.recover)
  │     :   --bits BITS           Ensure that the seed is of the specified bit length;
  │     :                         128, 256, 512 supported.
  │     :   --using-bip39         Generate Seed from secret Entropy using BIP-39
  │     :                         generation algorithm (encode as BIP-39 Mnemonics,
  │     :                         encrypted using --passphrase)
  │     :   --passphrase PASSPHRASE
  │     :                         Encrypt the master secret w/ this passphrase, '-'
  │     :                         reads it from stdin (default: None/'')
  │     :   -C CARD, --card CARD  Card size; business, credit, index, half, third,
  │     :                         quarter, photo or '(<h>,<w>),<margin>' (default:
  │     :                         business)
  │     :   --no-card             Disable PDF SLIP-39 mnemonic card output
  │     :   --paper PAPER         Paper size (default: Letter)
  │     :   --cover               Produce PDF SLIP-39 cover page
  │     :   --no-cover            Disable PDF SLIP-39 cover page
  │     :   --text                Enable textual SLIP-39 mnemonic output to stdout
  │     :   --watermark WATERMARK
  │     :                         Include a watermark on the output SLIP-39 mnemonic
  │     :                         cards
  └────


3.4 Recovery & Re-Creation
──────────────────────────

  Later, if you need to recover the wallet seed, keep entering SLIP-39
  mnemonics into `slip39-recovery' until the secret is recovered
  (invalid/duplicate mnemonics will be ignored):

  ┌────
  │   $ python3 -m slip39.recovery   # (or just "slip39-recovery")
  │   Enter 1st SLIP-39 mnemonic: ab c
  │   Enter 2nd SLIP-39 mnemonic: veteran guilt acrobat romp burden campus purple webcam uncover ...
  │   Enter 3rd SLIP-39 mnemonic: veteran guilt acrobat romp burden campus purple webcam uncover ...
  │   Enter 4th SLIP-39 mnemonic: veteran guilt beard romp dragon island merit burden aluminum worthy ...
  │   2021-12-25 11:03:33 slip39.recovery  Recovered SLIP-39 secret; Use:  python3 -m slip39 --secret ...
  │   383597fd63547e7c9525575decd413f7
  └────
  Finally, re-create the wallet seed, perhaps including an encrypted
  JSON Paper Wallet for import of some accounts into a software wallet
  (use `--json password' to output encrypted Ethereum JSON wallet
  files):

  ┌────
  │   slip39 --secret 383597fd63547e7c9525575decd413f7 --wallet password --wallet-hint bad:pass... 2>&1
  └────

  ┌────
  │ 2022-11-11 08:07:34 slip39           It is recommended to not use '-s|--secret <hex>'; specify '-' to read from input
  │ 2022-11-11 08:07:34 slip39           It is recommended to not use '-w|--wallet <password>'; specify '-' to read from input
  │ 2022-11-11 08:07:34 slip39.layout    ETH    m/44'/60'/0'/0/0    : 0xb44A2011A99596671d5952CdC22816089f142FB3
  │ 2022-11-11 08:07:34 slip39.layout    BTC    m/84'/0'/0'/0/0     : bc1qcupw7k8enymvvsa7w35j5hq4ergtvus3zk8a8s
  │ 2022-11-11 08:07:37 slip39.layout    Writing SLIP39-encoded wallet for 'SLIP39' to: SLIP39-2022-11-11+08.07.35-ETH-0xb44A2011A99596671d5952CdC22816089f142FB3.pdf
  └────


3.4.1 `slip39.recovery' Synopsis
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌

  ┌────
  │     slip39-recovery --help 2>&1                | sed 's/^/: /' # (just for output formatting)
  └────

  ┌────
  │     : usage: slip39-recovery [-h] [-v] [-q] [-m MNEMONIC] [-e] [-b] [-u] [--binary]
  │     :                        [-p PASSPHRASE]
  │     : 
  │     : Recover and output secret Seed from SLIP-39 or BIP-39 Mnemonics
  │     : 
  │     : options:
  │     :   -h, --help            show this help message and exit
  │     :   -v, --verbose         Display logging information.
  │     :   -q, --quiet           Reduce logging output.
  │     :   -m MNEMONIC, --mnemonic MNEMONIC
  │     :                         Supply another SLIP-39 (or a BIP-39) mnemonic phrase
  │     :   -e, --entropy         Return the BIP-39 Mnemonic Seed Entropy instead of the
  │     :                         generated Seed (default: False)
  │     :   -b, --bip39           Recover Entropy and generate 512-bit secret Seed from
  │     :                         BIP-39 Mnemonic + passphrase
  │     :   -u, --using-bip39     Recover Entropy from SLIP-39, generate 512-bit secret
  │     :                         Seed using BIP-39 Mnemonic + passphrase
  │     :   --binary              Output seed in binary instead of hex
  │     :   -p PASSPHRASE, --passphrase PASSPHRASE
  │     :                         Decrypt the SLIP-39 or BIP-39 master secret w/ this
  │     :                         passphrase, '-' reads it from stdin (default: None/'')
  │     : 
  │     : If you obtain a threshold number of SLIP-39 mnemonics, you can recover the original
  │     : secret Seed Entropy, and then re-generate one or more wallets from it.
  │     : 
  │     : Enter the mnemonics when prompted and/or via the command line with -m |--mnemonic "...".
  │     : 
  │     : The secret Seed Entropy can then be used to generate a new SLIP-39 encoded wallet:
  │     : 
  │     :     python3 -m slip39 --secret = "ab04...7f"
  │     : 
  │     : SLIP-39 Mnemonics may be encrypted with a passphrase; this is *not* Ledger-compatible, so it rarely
  │     : recommended!  Typically, on a Trezor "Model T", you recover using your SLIP-39 Mnemonics, and then
  │     : use the "Hidden wallet" feature (passwords entered on the device) to produce alternative sets of
  │     : accounts.
  │     : 
  │     : BIP-39 Mnemonics can be backed up as SLIP-39 Mnemonics, in two ways:
  │     : 
  │     : 1) The actual BIP-39 standard 512-bit Seed can be generated by supplying --passphrase, but only at
  │     : the cost of 59-word SLIP-39 mnemonics.  This is because the *output* 512-bit BIP-39 Seed must be
  │     : stored in SLIP-39 -- not the *input* 128-, 160-, 192-, 224-, or 256-bit entropy used to create the
  │     : original BIP-39 mnemonic phrase.
  │     : 
  │     : 2) The original BIP-39 12- or 24-word, 128- to 256-bit Seed Entropy can be recovered by supplying
  │     : --entropy.  This modifies the BIP-39 recovery to return the original BIP-39 Mnemonic Entropy, before
  │     : decryption and seed generation.  It has no effect for SLIP-39 recovery.
  └────


3.4.2 Pipelining `slip39.recovery | slip39 --secret -'
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌

  The tools can be used in a pipeline to avoid printing the secret.
  Here we generate some mnemonics, sorting them in reverse order so we
  need more than just the first couple to recover.  Observe the Ethereum
  wallet address generated.

  Then, we recover the master secret seed in hex with `slip39-recovery',
  and finally send it to `slip39 --secret -' to re-generate the same
  wallet as we originally created.

  ┌────
  │    ( python3 -m slip39 --text --no-card \
  │        | ( sort -r  ; echo "...later..." 1>&2 ) \
  │        | python3 -m slip39.recovery \
  │        | python3 -m slip39 --secret - --no-card \
  │     ) 2>&1
  └────

  ┌────
  │ 2022-11-11 08:07:38 slip39.layout    ETH    m/44'/60'/0'/0/0    : 0xf8B45eaCC292Ff9e51F48F725121c187cFc06dcF
  │ 2022-11-11 08:07:38 slip39.layout    BTC    m/84'/0'/0'/0/0     : bc1qs3mvgap7gq6xtuzxqfc0vcmvt9fhh9zp285yej
  │ ...later...
  │ 2022-11-11 08:07:39 slip39.layout    ETH    m/44'/60'/0'/0/0    : 0xf8B45eaCC292Ff9e51F48F725121c187cFc06dcF
  │ 2022-11-11 08:07:39 slip39.layout    BTC    m/84'/0'/0'/0/0     : bc1qs3mvgap7gq6xtuzxqfc0vcmvt9fhh9zp285yej
  └────


3.4.3 Pipelining Backup of a BIP-39 Mnemonic Phrase
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌

  A primary use case for `python-slip39' will be to backup an existing
  BIP-39 Mnemonic Phrase to SLIP-39 cards, so here it is:

  ┌────
  │ python3 -m slip39.recovery --bip39 --entropy \
  │     --mnemonic "zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo wrong" \
  │         | python3 -m slip39 --using-bip39 --secret -
  └────


3.5 Generation of Addresses
───────────────────────────

  For systems that require a stream of groups of wallet Addresses
  (eg. for preparing invoices for clients, with a choice of
  cryptocurrency payment options), `slip-generator' can produce a stream
  of groups of addresses.


3.5.1 `slip39-generator' Synopsis
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌

  ┌────
  │     slip39-generator --help --version         | sed 's/^/: /' # (just for output formatting)
  └────

  ┌────
  │     : usage: slip39-generator [-h] [-v] [-q] [-s SECRET] [-f FORMAT] [--xpub]
  │     :                         [--no-xpub] [-c CRYPTOCURRENCY] [--path PATH]
  │     :                         [-d DEVICE] [--baudrate BAUDRATE] [-e ENCRYPT]
  │     :                         [--decrypt ENCRYPT] [--enumerated] [--no-enumerate]
  │     :                         [--receive] [--corrupt CORRUPT]
  │     : 
  │     : Generate public wallet address(es) from a secret seed
  │     : 
  │     : options:
  │     :   -h, --help            show this help message and exit
  │     :   -v, --verbose         Display logging information.
  │     :   -q, --quiet           Reduce logging output.
  │     :   -s SECRET, --secret SECRET
  │     :                         Use the supplied 128-, 256- or 512-bit hex value as
  │     :                         the secret seed; '-' (default) reads it from stdin
  │     :                         (eg. output from slip39.recover)
  │     :   -f FORMAT, --format FORMAT
  │     :                         Specify crypto address formats: legacy, segwit,
  │     :                         bech32; default: ETH:legacy, BTC:bech32, LTC:bech32,
  │     :                         DOGE:legacy, CRO:bech32, BNB:legacy, XRP:legacy
  │     :   --xpub                Output xpub... instead of cryptocurrency wallet
  │     :                         address (and trim non-hardened default path segments)
  │     :   --no-xpub             Inhibit output of xpub (compatible w/ pre-v10.0.0)
  │     :   -c CRYPTOCURRENCY, --cryptocurrency CRYPTOCURRENCY
  │     :                         A crypto name and optional derivation path (default:
  │     :                         "ETH:{Account.path_default('ETH')}"), optionally w/
  │     :                         ranges, eg: ETH:../0/-
  │     :   --path PATH           Modify all derivation paths by replacing the final
  │     :                         segment(s) w/ the supplied range(s), eg. '.../1/-'
  │     :                         means .../1/[0,...)
  │     :   -d DEVICE, --device DEVICE
  │     :                         Use this serial device to transmit (or --receive)
  │     :                         records
  │     :   --baudrate BAUDRATE   Set the baud rate of the serial device (default:
  │     :                         115200)
  │     :   -e ENCRYPT, --encrypt ENCRYPT
  │     :                         Secure the channel from errors and/or prying eyes with
  │     :                         ChaCha20Poly1305 encryption w/ this password; '-'
  │     :                         reads from stdin
  │     :   --decrypt ENCRYPT
  │     :   --enumerated          Include an enumeration in each record output (required
  │     :                         for --encrypt)
  │     :   --no-enumerate        Disable enumeration of output records
  │     :   --receive             Receive a stream of slip.generator output
  │     :   --corrupt CORRUPT     Corrupt a percentage of output symbols
  │     : 
  │     : Once you have a secret seed (eg. from slip39.recovery), you can generate a sequence
  │     : of HD wallet addresses from it.  Emits rows in the form:
  │     : 
  │     :     <enumeration> [<address group(s)>]
  │     : 
  │     : If the output is to be transmitted by an insecure channel (eg. a serial port), which may insert
  │     : errors or allow leakage, it is recommended that the records be encrypted with a cryptographic
  │     : function that includes a message authentication code.  We use ChaCha20Poly1305 with a password and a
  │     : random nonce generated at program start time.  This nonce is incremented for each record output.
  │     : 
  │     : Since the receiver requires the nonce to decrypt, and we do not want to separately transmit the
  │     : nonce and supply it to the receiver, the first record emitted when --encrypt is specified is the
  │     : random nonce, encrypted with the password, itself with a known nonce of all 0 bytes.  The plaintext
  │     : data is random, while the nonce is not, but since this construction is only used once, it should be
  │     : satisfactory.  This first nonce record is transmitted with an enumeration prefix of "nonce".
  └────


3.5.2 Producing Addresses
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌

  Addresses can be produced in plaintext or encrypted, and output to
  stdout or to a serial port.

  ┌────
  │     echo ffffffffffffffffffffffffffffffff | slip39-generator --secret - --path '../-3' 2>&1
  └────

  ┌────
  │ 0: [["ETH", "m/44'/60'/0'/0/0", "0x824b174803e688dE39aF5B3D7Cd39bE6515A19a1"], ["BTC", "m/84'/0'/0'/0/0", "bc1q9yscq3l2yfxlvnlk3cszpqefparrv7tk24u6pl"]]
  │ 1: [["ETH", "m/44'/60'/0'/0/1", "0x8D342083549C635C0494d3c77567860ee7456963"], ["BTC", "m/84'/0'/0'/0/1", "bc1qnec684yvuhfrmy3q856gydllsc54p2tx9w955c"]]
  │ 2: [["ETH", "m/44'/60'/0'/0/2", "0x52787E24965E1aBd691df77827A3CfA90f0166AA"], ["BTC", "m/84'/0'/0'/0/2", "bc1q2snj0zcg23dvjpw7m9lxtu0ap0hfl5tlddq07j"]]
  │ 3: [["ETH", "m/44'/60'/0'/0/3", "0xc2442382Ae70c77d6B6840EC6637dB2422E1D44e"], ["BTC", "m/84'/0'/0'/0/3", "bc1qxwekjd46aa5n0s3dtsynvtsjwsne7c5f5w5dsd"]]
  └────


  To produce accounts from a BIP-39 or SLIP-39 seed, recover it using
  slip39-recovery.

  Here's an example of recovering a test BIP-39 seed; note that it
  yields the well-known ETH `0xfc20...1B5E' and BTC `bc1qk0...gnn2'
  accounts associated with this test Mnemonic:

  ┌────
  │     ( python3 -m slip39.recovery --bip39 --mnemonic 'zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo wrong' \
  │         | python3 -m slip39.generator --secret - --path '../-3' --format 'BTC:segwit' --crypto 'DOGE' ) 2>&1
  └────

  ┌────
  │ 0: [["DOGE", "m/44'/3'/0'/0/0", "DTMaJd8wqye1fymnjxZ5Cc5QkN1w4pMgXT"], ["BTC", "m/44'/0'/0'/0/0", "3KcPbsc9NYWwoi9ykJ3KPmmh41L2fZezJe"]]
  │ 1: [["DOGE", "m/44'/3'/0'/0/1", "DGkL2LD5FfccAaKtx8G7TST5iZwrNkecTY"], ["BTC", "m/44'/0'/0'/0/1", "3GZ22fkDYPY3AhpZE2MbtyxbJJE1ZrWcQS"]]
  │ 2: [["DOGE", "m/44'/3'/0'/0/2", "DQa3SpFZH3fFpEFAJHTXZjam4hWiv9muJX"], ["BTC", "m/44'/0'/0'/0/2", "3DCaNJnndHE7Vqv5hgLiiLwDAFCgWDMaK7"]]
  │ 3: [["DOGE", "m/44'/3'/0'/0/3", "DTW5tqLwspMY3NpW3RrgMfjWs5gnpXtfwe"], ["BTC", "m/44'/0'/0'/0/3", "3PYjoq3gT8qNQ8g3HVP9sHZdGMT5qAhW4v"]]
  └────


  We can encrypt the output, to secure the sequence (and due to
  integrated MACs, ensures no errors occur over an insecure channel like
  a serial cable):

  ┌────
  │     ( slip39-recovery --bip39 --mnemonic 'zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo wrong' \
  │         | slip39-generator --secret - --path '../-3' --encrypt 'password' ) 2>&1 \
  │             | sed -E 's/^(.{100})(.{1,})$/\1.../'  # (shorten output)
  └────

  ┌────
  │ 
  │ 
  │ nonce: 93b529b5457eddf819e97af426d1d561cc54ec2e43180ceb00561a7d
  │     0: 9d8dfd5c7a6507ad948b57660cf61408cf4fc9785322b15ad2cac891e0b79040fc23a9efaad617a78009107b7e59f...
  │     1: b369cc34149e559d6fab246f12901177211eb01febe8d5aa4fa92567ec29d916ac51d4cdb837de9e642232603363a...
  │     2: 40fcaaa197b025a81df9bb8f17cfd3ce4413606cc72db2938ce554509f22a4f039e69c79c80a0e3368d1494352113...
  │     3: 25dda19f7ee6927650f25fff8470ba8b50246f300656fe744e69a575fbb107a4a3fc951bce00e0cd9c915b1726637...
  └────


  On the receiving computer, we can decrypt and recover the stream of
  accounts from the wallet seed; any rows with errors are ignored:
  ┌────
  │     ( slip39-recovery --bip39 --mnemonic 'zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo wrong' \
  │         | slip39-generator --secret - --path '../-3' --encrypt 'password' \
  │         | slip39-generator --receive --decrypt 'password' ) 2>&1
  └────

  ┌────
  │ 0: [["ETH", "m/44'/60'/0'/0/0", "0xfc2077CA7F403cBECA41B1B0F62D91B5EA631B5E"], ["BTC", "m/84'/0'/0'/0/0", "bc1qk0a9hr7wjfxeenz9nwenw9flhq0tmsf6vsgnn2"]]
  │ 1: [["ETH", "m/44'/60'/0'/0/1", "0xd1a7451beB6FE0326b4B78e3909310880B781d66"], ["BTC", "m/84'/0'/0'/0/1", "bc1qkd33yck74lg0kaq4tdcmu3hk4yruhjayxpe9ug"]]
  │ 2: [["ETH", "m/44'/60'/0'/0/2", "0x578270B5E5B53336baC354756b763b309eCA90Ef"], ["BTC", "m/84'/0'/0'/0/2", "bc1qvr7e5aytd0hpmtaz2d443k364hprvqpm3lxr8w"]]
  │ 3: [["ETH", "m/44'/60'/0'/0/3", "0x909f59835A5a120EafE1c60742485b7ff0e305da"], ["BTC", "m/84'/0'/0'/0/3", "bc1q6t9vhestkcfgw4nutnm8y2z49n30uhc0kyjl0d"]]
  └────


3.5.3 X Public Keys
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌

  If you prefer, you can output "xpub…" format public keys, instead of
  account addresses.  By default, this will elide the non-hardened
  portion of the default addresses – use the "xpub…"  keys to produce
  the remaining non-hardened portion of the HD wallet paths locally.

  For example, assume you must produce a sequence of accounts for each
  client client of your company to deposit into.  Your highly secure
  serial-connected "key enclave" system (which must know your HD wallet
  seed) emits a sequence of xpubkeys for each new client over a serial
  cable, to your accounting system:

  ┌────
  │     ( python3 -m slip39.recovery --bip39 --mnemonic 'zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo wrong' \
  │         | python3 -m slip39.generator --secret - --xpub --path "../-2'"  --encrypt 'password' \
  │         | python3 -m slip39.generator -v --receive --decrypt 'password' ) 2>&1
  └────

  ┌────
  │ 2022-11-11 08:07:43 slip39.generator Decrypting accountgroups with nonce: 7b1f01f3dc8712183e9aa465
  │     0: [["ETH", "m/44'/60'/0'", "xpub6C2y6te3rtGg9SspDDFbjGEgn7yxc5ZzzkBk62yz3GRKvuqdaMDS7NUbesTJ44FprxAE7hvm5ZQjDMbYWehdJQsyBCP3mL87nnB4cB47HGS"], ["BTC", "m/84'/0'/0'", "zpub6rD5AGSXPTDMSnpmczjENMT3NvVF7q5MySww6uxitUsBYgkZLeBywrcwUWhW5YkeY2aS7xc45APPgfA6s6wWfG2gnfABq6TDz9zqeMu2JCY"]]
  │     1: [["ETH", "m/44'/60'/1'", "xpub6C2y6te3rtGgCPb4Gi89Qin7Da2dvnnHSuR9rLQV6bWQKiyfKyjtVzr2n9mKmTEHzr4rzK78LmdSXLSzvpZqVs4ussUU8NyXpt9nWWbKG3C"], ["BTC", "m/84'/0'/1'", "zpub6rD5AGSXPTDMUaSe3aGDqWk4uMTwcrFwytkKuDGmi3ofUkJ4dQxXHZwiXWbHHrELJAor8xGs61F8sbKS2JdQkLZRnu5PGktmr6F32nEBUBb"]]
  │     2: [["ETH", "m/44'/60'/2'", "xpub6C2y6te3rtGgENnaK62SyPawqKvbde17wc2ndMGFWi2yAkk3piwEY9QK8egtE9ye9uoqiqs5WV3MTNCCP2qjUNDb8cmSg4ZsVnwQnkziXVh"], ["BTC", "m/84'/0'/2'", "zpub6rD5AGSXPTDMYx2sQPuZgceniniRXDK5tELiREjxfSGJENNxuQD3u2yfpRqnNE1JeH14Pa7MVGrofDJtyXw252ws9HgRcd82X2M4KzkUfpZ"]]
  └────


  As required (throttled by hardward the serial cable RTS/CTS signals)
  your accounting system receives these "xpub…" addresses:

  ┌────
  │     ( python3 -m slip39.recovery --bip39 --mnemonic 'zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo wrong' \
  │         | python3 -m slip39.generator --secret - --xpub --path "../-2'"  --encrypt 'password' \
  │         | python3 -m slip39.generator -v --receive --decrypt 'password' \
  │         | while IFS=':' read num json; do \
  │             echo "--- $(( num ))"; \
  │             echo "$json" | jq -c '.[]'; \
  │         done \
  │     ) 2>&1
  └────

  ┌────
  │     2022-11-11 08:07:44 slip39.generator Decrypting accountgroups with nonce: 40320b0ec7e0da57745fabe8
  │     --- 0
  │     ["ETH","m/44'/60'/0'","xpub6C2y6te3rtGg9SspDDFbjGEgn7yxc5ZzzkBk62yz3GRKvuqdaMDS7NUbesTJ44FprxAE7hvm5ZQjDMbYWehdJQsyBCP3mL87nnB4cB47HGS"]
  │     ["BTC","m/84'/0'/0'","zpub6rD5AGSXPTDMSnpmczjENMT3NvVF7q5MySww6uxitUsBYgkZLeBywrcwUWhW5YkeY2aS7xc45APPgfA6s6wWfG2gnfABq6TDz9zqeMu2JCY"]
  │     --- 1
  │     ["ETH","m/44'/60'/1'","xpub6C2y6te3rtGgCPb4Gi89Qin7Da2dvnnHSuR9rLQV6bWQKiyfKyjtVzr2n9mKmTEHzr4rzK78LmdSXLSzvpZqVs4ussUU8NyXpt9nWWbKG3C"]
  │     ["BTC","m/84'/0'/1'","zpub6rD5AGSXPTDMUaSe3aGDqWk4uMTwcrFwytkKuDGmi3ofUkJ4dQxXHZwiXWbHHrELJAor8xGs61F8sbKS2JdQkLZRnu5PGktmr6F32nEBUBb"]
  │     --- 2
  │     ["ETH","m/44'/60'/2'","xpub6C2y6te3rtGgENnaK62SyPawqKvbde17wc2ndMGFWi2yAkk3piwEY9QK8egtE9ye9uoqiqs5WV3MTNCCP2qjUNDb8cmSg4ZsVnwQnkziXVh"]
  │     ["BTC","m/84'/0'/2'","zpub6rD5AGSXPTDMYx2sQPuZgceniniRXDK5tELiREjxfSGJENNxuQD3u2yfpRqnNE1JeH14Pa7MVGrofDJtyXw252ws9HgRcd82X2M4KzkUfpZ"]
  └────

  Then, it generates each client's sequence of addresses locally: you
  are creating HD wallet accounts from each "xpub…" key, and adding the
  remaining non-hardened HD wallet path segments:

  ┌────
  │     ( python3 -m slip39.recovery --bip39 --mnemonic 'zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo wrong' \
  │         | python3 -m slip39.generator --secret - --xpub --path "../-2'"  --encrypt 'password' \
  │         | python3 -m slip39.generator -v --receive --decrypt 'password' \
  │         | while IFS=':' read num json; do \
  │             echo "--- $(( num ))"; \
  │             echo "$json" | jq -cr '.[]|"--crypto " + .[0] + " --secret " + .[2]' | while read command; do \
  │                 python3 -m slip39.cli -v --no-json addresses $command --paths m/0/-2; \
  │             done; \
  │         done \
  │     ) 2>&1
  └────

  ┌────
  │     2022-11-11 08:07:45 slip39.generator Decrypting accountgroups with nonce: 514ae44d2c5946b2d3ed6ab0
  │     --- 0
  │     ETH   m/0/0                0xfc2077CA7F403cBECA41B1B0F62D91B5EA631B5E
  │     ETH   m/0/1                0xd1a7451beB6FE0326b4B78e3909310880B781d66
  │     ETH   m/0/2                0x578270B5E5B53336baC354756b763b309eCA90Ef
  │     BTC   m/0/0                bc1qk0a9hr7wjfxeenz9nwenw9flhq0tmsf6vsgnn2
  │     BTC   m/0/1                bc1qkd33yck74lg0kaq4tdcmu3hk4yruhjayxpe9ug
  │     BTC   m/0/2                bc1qvr7e5aytd0hpmtaz2d443k364hprvqpm3lxr8w
  │     --- 1
  │     ETH   m/0/0                0x9176A747BA67C1d7F80AaDC930180b4183AfB5c4
  │     ETH   m/0/1                0xa1409B655aC3e09eF261de00BAa4e85bD2820AA4
  │     ETH   m/0/2                0xae22C13Ef5891Ed835C24Ed5090542DFa748c21F
  │     BTC   m/0/0                bc1q8pqnqs573vx3qdp0xp6qdqzvnvy8px24rxh9lp
  │     BTC   m/0/1                bc1qwtc58u4mmnxa29u8j07e6lmqpnrs38vefy3y24
  │     BTC   m/0/2                bc1qg9s8qzm0lcetfv6umhlm3evtca5zsqv7elqd5s
  │     --- 2
  │     ETH   m/0/0                0x32A8b066c5dbD37147766491A32A612d313fda25
  │     ETH   m/0/1                0xff8b88b975f9C296531C1E93d5e4f28757b4571A
  │     ETH   m/0/2                0xc95Bdf50CA542E1B689f5C06e2D8bAd0625Dfa23
  │     BTC   m/0/0                bc1q09zpchmkcnny90ghkg76gd69dvaf57qwcsrhes
  │     BTC   m/0/1                bc1qjytdyw6zramwt4nvvpte93hfry2d4xhhqn0xg4
  │     BTC   m/0/2                bc1qcummre0pxv5xj4gvyut0t84vfwjd6eu7r387v4
  └────

  You'll notice that, after this elaborate exercise of generating
  xpubkeys, encrypted transmission and recovery, generating accounts
  from the xpubkeys, and producing multiples addresses using the
  remainder of the original HD wallet paths: the output addresses are
  identical to those generated directly from the BIP-39 Mnemonic Phrase:

  ┌────
  │     secret=$( python3 -m slip39.recovery --bip39 --mnemonic 'zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo wrong' );
  │     for crypto in BTC ETH; do
  │         python3 -m slip39.cli -v --no-json addresses --secret $secret --crypto $crypto --paths "../-2"
  │     done
  └────

  ┌────
  │ BTC   m/84'/0'/0'/0/0      bc1qk0a9hr7wjfxeenz9nwenw9flhq0tmsf6vsgnn2
  │ BTC   m/84'/0'/0'/0/1      bc1qkd33yck74lg0kaq4tdcmu3hk4yruhjayxpe9ug
  │ BTC   m/84'/0'/0'/0/2      bc1qvr7e5aytd0hpmtaz2d443k364hprvqpm3lxr8w
  │ ETH   m/44'/60'/0'/0/0     0xfc2077CA7F403cBECA41B1B0F62D91B5EA631B5E
  │ ETH   m/44'/60'/0'/0/1     0xd1a7451beB6FE0326b4B78e3909310880B781d66
  │ ETH   m/44'/60'/0'/0/2     0x578270B5E5B53336baC354756b763b309eCA90Ef
  └────


3.5.4 Serial Port Connected Secure Seed Enclave
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌

  What if you or your company wants to accept Crypto payments, and needs
  to generate a sequence of wallets unique to each client?  You *can*
  use an xpubkey and then generate a sequence of unique addresses from
  that, which doesn't disclose any of your private key material:

  ┌────
  │     ( python3 -m slip39.recovery --bip39 --mnemonic 'zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo wrong' \
  │         | python3 -m slip39.generator --secret - --xpub --path "../-2'" --crypto BTC
  │     ) 2>&1
  └────

  ┌────
  │ 0: [["BTC", "m/84'/0'/0'", "zpub6rD5AGSXPTDMSnpmczjENMT3NvVF7q5MySww6uxitUsBYgkZLeBywrcwUWhW5YkeY2aS7xc45APPgfA6s6wWfG2gnfABq6TDz9zqeMu2JCY"]]
  │ 1: [["BTC", "m/84'/0'/1'", "zpub6rD5AGSXPTDMUaSe3aGDqWk4uMTwcrFwytkKuDGmi3ofUkJ4dQxXHZwiXWbHHrELJAor8xGs61F8sbKS2JdQkLZRnu5PGktmr6F32nEBUBb"]]
  │ 2: [["BTC", "m/84'/0'/2'", "zpub6rD5AGSXPTDMYx2sQPuZgceniniRXDK5tELiREjxfSGJENNxuQD3u2yfpRqnNE1JeH14Pa7MVGrofDJtyXw252ws9HgRcd82X2M4KzkUfpZ"]]
  └────


  Since you have to generate such an xpubkey from a "hardened" path,
  such as with `slip39.generate --xpub ...', you *still* need to run
  that tool chain on some secure "air gapped" computer.  So, how do you
  do that safely, knowing that you need to input your SLIP-39 or BIP-39
  Mnemonics on that computer?  Especially, if you want to do this under
  any kind of automation, and deliver the output xpubkey to your
  insecure business computer systems?

  One solution is to have the computer hosting your Seed or Mnemonic
  private key material *only* connected to your business computer
  systems with a guaranteed *safe* mechanism.  Definitely *not* with any
  kind of general purpose network system!

  The solution: *The RS-232 Serial Port*

  With USB to [DB-9 female] to [DB-9 male] serial adapters, any small
  computer with USB ports (such as the [Raspberry Pi 400]) can be
  connected serially and serve as your "secure" computer, storing your
  Seed Mnemonic.

  Remember to disable all other wired and wireless networking!

  The RS-232 port on the "secure" computer can be protected from all
  incoming data transmissions, make an exploit effectively impossible,
  while still allowing outgoing data (the generated xpubkeys).

  A DB-9 [serial breakout] board or custom serial adapter be easily
  constructed that disconnects pin 3 (TXD) on the "business" side from
  pin 2 (RXD) on the "secure" side, eliminating any chance of data being
  sent to the "secure" side.  The only electronic connection that
  transmits data to the "secure" side is the hardware flow control pin 7
  (RTS) to pin 8 (CTS).  An exploit using this single-bit approach
  vector is … unlikely. :)


[DB-9 female] <https://amzn.to/3DXSYol>

[DB-9 male] <https://amzn.to/3toukby>

[Raspberry Pi 400] <https://amzn.to/3A6Gwlb>

[serial breakout] <https://amzn.to/3EnLEEd>


3.6 The `slip39' module API
───────────────────────────

  Provide SLIP-39 Mnemonic set creation from a 128-bit master secret,
  and recovery of the secret from a subset of the provided Mnemonic set.


3.6.1 `slip39.create'
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌

  Creates a set of SLIP-39 groups and their mnemonics.

  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   Key                 Description                                                                
  ────────────────────────────────────────────────────────────────────────────────────────────────
   name                Who/what the account is for                                                
   group_threshold     How many groups' data is required to recover the account(s)                
   groups              Each group's description, as {"<group>":(<required>, <members>), …}        
   master_secret       128-bit secret (default: from secrets.token_bytes)                         
   passphrase          An optional additional passphrase required to recover secret (default: "") 
   using_bip39         Produce wallet Seed from master_secret Entropy using BIP-39 generation     
   iteration_exponent  For encrypted secret, exponentially increase PBKDF2 rounds (default: 1)    
   cryptopaths         A number of crypto names, and their derivation paths ]                     
   strength            Desired master_secret strength, in bits (default: 128)                     
  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
  Outputs a `slip39.Details' namedtuple containing:

  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   Key              Description                                        
  ─────────────────────────────────────────────────────────────────────
   name             (same)                                             
   group_threshold  (same)                                             
   groups           Like groups, w/ <members> =  ["<mnemonics>", …]    
   accounts         Resultant list of groups of accounts               
   using_bip39      Seed produced from entropy using BIP-39 generation 
  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
  This is immediately usable to pass to `slip39.output'.

  ┌────
  │     import codecs
  │     import random
  │     from tabulate import tabulate
  │ 
  │     #
  │     # NOTE:
  │     #
  │     # We turn off randomness here during SLIP-39 generation to get deterministic phrases;
  │     # during normal operation, secure entropy is used during mnemonic generation, yielding
  │     # random phrases, even when the same seed is used multiple times.
  │     # 
  │     import shamir_mnemonic
  │     shamir_mnemonic.shamir.RANDOM_BYTES = lambda n: b'\00' * n
  │ 
  │     import slip39
  │ 
  │     cryptopaths         = [("ETH","m/44'/60'/0'/0/-2"), ("BTC","m/44'/0'/0'/0/-2")]
  │     master_secret       = b'\xFF' * 16
  │     passphrase          = b""
  │     create_details      = slip39.create(
  │         "Test", 2, { "Mine": (1,1), "Fam": (2,3) },
  │         master_secret=master_secret, passphrase=passphrase, cryptopaths=cryptopaths )
  │ 
  │     print( tabulate( [
  │         [
  │             f"{g_name}({g_of}/{len(g_mnems)}) #{g_n+1}:" if l_n == 0 else ""
  │         ] + words
  │         for g_name,(g_of,g_mnems) in create_details.groups.items()
  │         for g_n,mnem in enumerate( g_mnems )
  │         for l_n,(line,words) in enumerate(slip39.organize_mnemonic(
  │                 mnem, label=f"{g_name}({g_of}/{len(g_mnems)}) #{g_n+1}:" ))
  │       ], tablefmt='orgtbl' ))
  └────

  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   Mine(1/1) #1:  1 academic  8 safari     15 standard 
                  2 acid      9 drug       16 angry    
                  3 acrobat   10 browser   17 similar  
                  4 easy      11 trash     18 aspect   
                  5 change    12 fridge    19 smug     
                  6 injury    13 busy      20 violence 
                  7 painting  14 finger                
   Fam(2/3) #1:   1 academic  8 prevent    15 dwarf    
                  2 acid      9 mouse      16 dream    
                  3 beard     10 daughter  17 flavor   
                  4 echo      11 ancient   18 oral     
                  5 crystal   12 fortune   19 chest    
                  6 machine   13 ruin      20 marathon 
                  7 bolt      14 warmth                
   Fam(2/3) #2:   1 academic  8 prune      15 briefing 
                  2 acid      9 pickup     16 often    
                  3 beard     10 device    17 escape   
                  4 email     11 device    18 sprinkle 
                  5 dive      12 peanut    19 segment  
                  6 warn      13 enemy     20 devote   
                  7 ranked    14 graduate              
   Fam(2/3) #3:   1 academic  8 dining     15 intimate 
                  2 acid      9 invasion   16 satoshi  
                  3 beard     10 bumpy     17 hobo     
                  4 entrance  11 identify  18 ounce    
                  5 alarm     12 anxiety   19 both     
                  6 health    13 august    20 award    
                  7 discuss   14 sunlight              
  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
  Add the resultant HD Wallet addresses:

  ┌────
  │     print( tabulate( [
  │         [ account.path, account.address ]
  │         for group in create_details.accounts
  │         for account in group
  │     ], tablefmt='orgtbl' ))
  └────

  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   m/44'/60'/0'/0/0  0x824b174803e688dE39aF5B3D7Cd39bE6515A19a1 
   m/44'/0'/0'/0/0   bc1qm5ua96hx30snwrwsfnv97q96h53l86ded7wmjl 
   m/44'/60'/0'/0/1  0x8D342083549C635C0494d3c77567860ee7456963 
   m/44'/0'/0'/0/1   bc1qwz6v9z49z8mk5ughj7r78hjsp45jsxgzh29lnh 
   m/44'/60'/0'/0/2  0x52787E24965E1aBd691df77827A3CfA90f0166AA 
   m/44'/0'/0'/0/2   bc1q690m430qu29auyefarwfrvfumncunvyw6v53n9 
  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━


3.6.2 `slip39.produce_pdf'
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌

  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   Key              Description                                                         
  ──────────────────────────────────────────────────────────────────────────────────────
   name             (same as `slip39.create')                                           
   group_threshold  (same as `slip39.create')                                           
   groups           Like groups, w/ <members> =  ["<mnemonics>", …]                     
   accounts         Resultant { "path": Account, …}                                     
   using_bip39      Generate Seed from Entropy via BIP-39 generation algorithm          
   card_format      'index', '(<h>,<w>),<margin>', …                                    
   paper_format     'Letter', …                                                         
   orientation      Force an orientation (default: portrait, landscape)                 
   cover_text       Produce a cover page w/ the text (and BIP-39 Phrase if using_bip39) 
  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
  Layout and produce a PDF containing all the SLIP-39 details on cards
  for the crypto accounts, on the paper_format provided.  Returns the
  paper (orientation,format) used, the FPDF, and passes through the
  supplied cryptocurrency accounts derived.

  ┌────
  │     (paper_format,orientation),pdf,accounts = slip39.produce_pdf( *create_details )
  │     pdf_binary = pdf.output()
  │     print( tabulate( [
  │         [ "Orientation:",	orientation ],
  │         [ "Paper:",		paper_format ],
  │         [ "PDF Pages:",		pdf.pages_count ],
  │         [ "PDF Size:",		len( pdf_binary )],
  │     ], tablefmt='orgtbl' ))
  └────

  ━━━━━━━━━━━━━━━━━━━━━━━━━
   Orientation:  landscape 
   Paper:           Letter 
   PDF Pages:            1 
   PDF Size:         19063 
  ━━━━━━━━━━━━━━━━━━━━━━━━━


3.6.3 `slip39.write_pdfs'
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌

  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   Key              Description                                                                                           
  ────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
   names            A sequence of Seed names, or a dict of { name: <details> } (from slip39.create)                       
   master_secret    A Seed secret (only appropriate if exactly one name supplied)                                         
   passphrase       A SLIP-39 passphrase (not Trezor compatible; use "hidden wallet" phrase on device instead)            
   using_bip39      Generate Seed from Entropy via BIP-39 generation algorithm                                            
   group            A dict of {"<group>":(<required>, <members>), …}                                                      
   group_threshold  How many groups are required to recover the Seed                                                      
   cryptocurrency   A sequence of [ "<crypto>", "<crypto>:<derivation>", … ] w/ optional ranges                           
   edit             Derivation range(s) for each cryptocurrency, eg. "../0-4/-9" is 9 accounts first 5 change addresses   
   card_format      Card size (eg. "credit"); False specifies no SLIP-39 cards (ie. only BIP-39 or JSON paper wallets)    
   paper_format     Paper size (eg. "letter")                                                                             
   filename         A filename; may contain "…{name}…" formatting, for name, date, time, crypto path and address          
   filepath         A file path, if PDF output to file is desired; empty implies current dir.                             
   printer          A printer name (or True for default), if output to printer is desired                                 
   json_pwd         If password supplied, encrypted Ethereum JSON wallet files will be saved, and produced into PDF       
   text             If True, outputs SLIP-39 phrases to stdout                                                            
   wallet_pwd       If password supplied, produces encrypted BIP-38 or JSON Paper Wallets to PDF (preferred vs. json_pwd) 
   wallet_pwd_hint  An optional passphrase hint, printed on paper wallet                                                  
   wallet_format    Paper wallet size, (eg. "third"); the default is 1/3 letter size                                      
   wallet_paper     Other paper format (default: Letter)                                                                  
   cover_page       A bool indicating whether to produce a cover page (default: True)                                     
  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
  For each of the names provided, produces a separate PDF containing all
  the SLIP-39 details and optionally encrypted BIP-38 paper wallets and
  Ethereum JSON wallets for the specified cryptocurrency accounts
  derived from the seed, and writes the PDF and JSON wallets to the
  specified file name(s).

  ┌────
  │     slip39.write_pdfs( ... )
  └────


3.6.4 `slip39.recover'
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌

  Takes a number of SLIP-39 mnemonics, and if sufficient
  `group_threshold' groups' mnemonics are present (and the options
  `passphrase' is supplied), the `master_secret' is recovered.  This can
  be used with `slip39.accounts' to directly obtain any `Account' data.

  Note that the SLIP-39 passphrase is *not* checked; entering a
  different passphrase for the same set of mnemonics will recover a
  *different* wallet!  This is by design; it allows the holder of the
  SLIP-39 mnemonic phrases to recover a "decoy" wallet by supplying a
  specific passphrase, while protecting the "primary" wallet.

  Therefore, it is *essential* to remember any non-default (non-empty)
  passphrase used, separately and securely.  Take great care in deciding
  if you wish to use a passphrase with your SLIP-39 wallet!

  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   Key          Description                                        
  ─────────────────────────────────────────────────────────────────
   mnemonics    ["<mnemonics>", …]                                 
   passphrase   Optional passphrase to decrypt secret Seed Entropy 
   using_bip39  Use BIP-39 Seed generation from recover Entropy    
  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
  ┌────
  │     # Recover with the wrong password (on purpose, as a decoy wallet w/ a small amount)
  │     recoverydecoy       = slip39.recover(
  │         create_details.groups['Mine'][1][:] + create_details.groups['Fam'][1][:2],
  │         passphrase=b"wrong!"
  │     )
  │     recoverydecoy_hex   = codecs.encode( recoverydecoy, 'hex_codec' ).decode( 'ascii' )
  │ 
  │     # But, recovering w/ correct passphrase yields our original Seed Entropy
  │     recoveryvalid       = slip39.recover(
  │         create_details.groups['Mine'][1][:] + create_details.groups['Fam'][1][:2],
  │         passphrase=passphrase
  │     )
  │     recoveryvalid_hex   = codecs.encode( recoveryvalid, 'hex_codec' ).decode( 'ascii' )
  │ 
  │     print( tabulate( [
  │       [ f"{len(recoverydecoy)*8}-bit secret (decoy):", f"{recoverydecoy_hex}" ],
  │       [ f"{len(recoveryvalid)*8}-bit secret recovered:", f"{recoveryvalid_hex}" ]
  │     ], tablefmt='orgtbl' ))
  └────

  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   128-bit secret (decoy):    2e522cea2b566840495c220cf79c756e 
   128-bit secret recovered:  ffffffffffffffffffffffffffffffff 
  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━


3.6.5 `slip39.recover_bip39'
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌

  Generate the 512-bit Seed from a BIP-39 Mnemonic + passphrase.  Or,
  return the original 128- to 256-bit Seed Entropy, if `as_entropy' is
  specified.

  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   Key         Description                                            
  ────────────────────────────────────────────────────────────────────
   mnemonic    "<mnemonic>"                                           
   passphrase  Optional passphrase to decrypt secret Seed Entropy     
   as_entropy  Return the BIP-39 Seed Entropy, not the generated Seed 
  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━


3.6.6 `slip39.produce_bip39'
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌

  Produce a BIP-39 Mnemonic from the supplied 128- to 256-bit Seed
  Entropy.

  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   Key       Description                                                 
  ───────────────────────────────────────────────────────────────────────
   entropy   The `bytes' of Seed Entropy                                 
   strength  Or, the number of bits of Entropy to produce (Default: 128) 
   language  Default is "english"                                        
  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━


4 Conversion from BIP-39 to SLIP-39
═══════════════════════════════════

  If we already have a BIP-39 wallet, it would certainly be nice to be
  able to create nice, safe SLIP-39 mnemonics for it, and discard the
  unsafe BIP-39 mnemonics we have lying around, just waiting to be
  accidentally discovered and the account compromised!

  Fortunately, *we can* do this!  It takes a bit of practice to become
  comfortable with the process, but once you do – you can confidently
  discard your original insecure and unreliable BIP-39 Mnemonic backups.


4.1 BIP-39 vs. SLIP-39 Incompatibility
──────────────────────────────────────

  Unfortunately, it is *not possible* to cleanly convert a BIP-39
  /generated/ wallet Seed into a SLIP-39 wallet.  Both BIP-39 and
  SLIP-39 preserve the original 128- to 256-bit Seed Entropy (random)
  bits, but these bits are used *very differently* – and incompatibly –
  to generate the resultant wallet Seed.

  In native SLIP-39, the original, recovered Seed Entropy (128- or
  256-bits) is used directly by the BIP-44 wallet derivation.  In
  BIP-39, the Seed entropy is not directly used /at all/!  It is only
  *indirectly* used; the BIP-39 Seed Phrase (which contains the exact,
  original entropy) is used, as normalized text, as input to a hashing
  function, along with some other fixed text, to produce a 512-bit Seed,
  which is then fed into the BIP-44 wallet derivation process.

  The least desirable method is to preserve the 512-bit *output* of the
  BIP-39 mnemonic phrase as a set of 512-bit (59-word) SLIP-39
  Mnemonics.  But first, lets review how BIP-39 works.


4.1.1 BIP-39 Entropy to Mnemonic
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌

  BIP-39 uses a single set of 12, 15, 18, 21 or 24 BIP-39 words to
  carefully preserve a specific 128 to 256 bits of initial Seed Entropy.
  Here's a 128-bit (12-word) example using some fixed "entropy"
  `0xFFFF..FFFF'.  You'll note that, from the BIP-39 Mnemonic, we can
  either recover the original 128-bit Seed Entropy, *or* we can generate
  the resultant 512-bit Seed w/ the correct passphrase:

  ┌────
  │     from mnemonic import Mnemonic
  │     bip39_english       = Mnemonic("english")
  │     entropy             = b'\xFF' * 16
  │     entropy_hex		= codecs.encode( entropy, 'hex_codec' ).decode( 'ascii' )
  │     entropy_mnemonic    = bip39_english.to_mnemonic( entropy )
  │ 
  │     recovered		= slip39.recover_bip39( entropy_mnemonic, as_entropy=True )
  │     recovered_hex	= codecs.encode( recovered, 'hex_codec' ).decode( 'ascii' )
  │ 
  │     recovered_seed	= slip39.recover_bip39( entropy_mnemonic, passphrase=passphrase )
  │     recovered_seed_hex	= codecs.encode( recovered_seed, 'hex_codec' ).decode( 'ascii' )
  │     
  │     print( tabulate( [
  │         [ "Original Entropy", entropy_hex ],
  │         [ "BIP-39 Mnemonic", entropy_mnemonic ],
  │         [ "Recovered Entropy", recovered_hex ],
  │         [ "Recovered Seed", f"{recovered_seed_hex:.50}..." ],
  │     ], tablefmt='orgtbl'))
  └────

  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   Original Entropy   ffffffffffffffffffffffffffffffff                    
   BIP-39 Mnemonic    zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo wrong   
   Recovered Entropy  ffffffffffffffffffffffffffffffff                    
   Recovered Seed     b6a6d8921942dd9806607ebc2750416b289adea669198769f2… 
  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
  Each word is one of a corpus of 2048 words; therefore, each word
  encodes 11 bits (2048 = 2**11) of entropy.  So, we provided 128 bits,
  but 12*11 = 132.  So where does the extra 4 bits of data come from?

  It comes from the first few bits of a SHA256 hash of the entropy,
  which is added to the end of the supplied 128 bits, to reach the
  required 132 bits: 132 / 11 = 12 words.

  This last 4 bits (up to 8 bits, for a 256-bit 24-word BIP-39) is
  checked, when validating the BIP-39 mnemonic.  Therefore, making up a
  random BIP-39 mnemonic will succeed only 1 / 16 times on average, due
  to an incorrect checksum 4-bit (16 = 2**4) .  Lets check:

  ┌────
  │     def random_words( n, count=100 ):
  │         for _ in range( count ):
  │             yield ' '.join( random.choice( bip39_english.wordlist ) for _ in range( n ))
  │ 
  │     successes           = sum(
  │         bip39_english.check( m )
  │         for i,m in enumerate( random_words( 12, 10000 ))) / 100
  │ 
  │     print( tabulate( [
  │       [ "Valid random 12-word mnemonics:", f"{successes}%" ],
  │       [ "Or, about: ", f"1 / {100/successes:.3}" ],
  │     ], tablefmt='orgtbl' ))
  └────

  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   Valid random 12-word mnemonics:     6.24% 
   Or, about:                       1 / 16.0 
  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
  Sure enough, about 1/16 random 12-word phrases are valid BIP-39
  mnemonics.  OK, we've got the contents of the BIP-39 phrase dialed in.
  How is it used to generate accounts?


4.1.2 BIP-39 Mnemonic to Seed
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌

  Unfortunately, BIP-39 does *not* use the carefully preserved 128-bit
  entropy to generate the wallet!  Nope, it is stretched to a 512-bit
  seed using PBKDF2 HMAC SHA512.  The normalized *text* (/not the
  Entropy bytes/) of the 12-word mnemonic is then used (with a salt of
  "mnemonic" plus an optional passphrase, "" by default), to obtain the
  512-bit seed:

  ┌────
  │     seed                = bip39_english.to_seed( entropy_mnemonic )
  │     seed_hex            = codecs.encode( seed, 'hex_codec' ).decode( 'ascii' )
  │     print( tabulate( [
  │      [ f"{len(seed)*8}-bit seed:", f"{seed_hex:.50}..." ]
  │     ], tablefmt='orgtbl' ))
  └────

  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   512-bit seed:  b6a6d8921942dd9806607ebc2750416b289adea669198769f2… 
  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━


4.1.3 BIP-39 Seed to Address
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌

  Finally, this 512-bit seed is used to derive HD wallet(s).  The HD
  Wallet key derivation process consumes whatever seed entropy is
  provided (512 bits in the case of BIP-39), and uses HMAC SHA512 with a
  prefix of b"Bitcoin seed" to stretch the supplied seed entropy to 64
  bytes (512 bits).  Then, the HD Wallet *path* segments are iterated
  through, permuting the first 32 bytes of this material as the key with
  the second 32 bytes of material as the chain node, until finally the
  32-byte (256-bit) Ethereum account private key is produced.  We then
  use this private key to compute the rest of the Ethereum account
  details, such as its public address.

  ┌────
  │     path                = "m/44'/60'/0'/0/0"
  │     bip39_eth_hd        = slip39.account( seed, 'ETH', path )
  │     print( tabulate( [
  │      [ f"{len(bip39_eth_hd.key)*4}-bit derived key path:", f"{path}" ],
  │      [ "Produces private key: ", f"{bip39_eth_hd.key}" ],
  │      [ "Yields Ethereum address:", f"{bip39_eth_hd.address}" ],
  │     ], tablefmt='orgtbl' ))
  └────

  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   256-bit derived key path:  m/44'/60'/0'/0/0                                                 
   Produces private key:      7af65ba4dd53f23495dcb04995e96f47c243217fc279f10795871b725cd009ae 
   Yields Ethereum address:   0xfc2077CA7F403cBECA41B1B0F62D91B5EA631B5E                       
  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
  Thus, we see that while the 12-word BIP-39 mnemonic careful preserves
  the original 128-bit entropy, this data is not directly used to derive
  the wallet private key and address.  Also, since an irreversible hash
  is used to derive the Seed from the Mnemonic, we can't reverse the
  process on the seed to arrive back at the BIP-39 mnemonic phrase.


4.1.4 SLIP-39 Entropy to Mnemonic
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌

  Just like BIP-39 carefully preserves the original 128-bit Seed Entropy
  bytes in a single 12-word mnemonic phrase, SLIP-39 preserves the
  original 128- or 256-bit Seed Entropy in a /set/ of 20- or 33-word
  Mnemonic phrases.

  ┌────
  │     name,thrs,grps,acct,ub39 = slip39.create(
  │         "Test", 2, { "Mine": (1,1), "Fam": (2,3) }, entropy )
  │     print( tabulate( [
  │         [ f"{g_name}({g_of}/{len(g_mnems)}) #{g_n+1}:" if l_n == 0 else "" ] + words
  │         for g_name,(g_of,g_mnems) in grps.items()
  │         for g_n,mnem in enumerate( g_mnems )
  │         for l_n,(line,words) in enumerate(slip39.organize_mnemonic(
  │                 mnem, rows=7, cols=3, label=f"{g_name}({g_of}/{len(g_mnems)}) #{g_n+1}:" ))
  │     ], tablefmt='orgtbl' ))
  └────

  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   Mine(1/1) #1:  1 academic  8 safari     15 standard 
                  2 acid      9 drug       16 angry    
                  3 acrobat   10 browser   17 similar  
                  4 easy      11 trash     18 aspect   
                  5 change    12 fridge    19 smug     
                  6 injury    13 busy      20 violence 
                  7 painting  14 finger                
   Fam(2/3) #1:   1 academic  8 prevent    15 dwarf    
                  2 acid      9 mouse      16 dream    
                  3 beard     10 daughter  17 flavor   
                  4 echo      11 ancient   18 oral     
                  5 crystal   12 fortune   19 chest    
                  6 machine   13 ruin      20 marathon 
                  7 bolt      14 warmth                
   Fam(2/3) #2:   1 academic  8 prune      15 briefing 
                  2 acid      9 pickup     16 often    
                  3 beard     10 device    17 escape   
                  4 email     11 device    18 sprinkle 
                  5 dive      12 peanut    19 segment  
                  6 warn      13 enemy     20 devote   
                  7 ranked    14 graduate              
   Fam(2/3) #3:   1 academic  8 dining     15 intimate 
                  2 acid      9 invasion   16 satoshi  
                  3 beard     10 bumpy     17 hobo     
                  4 entrance  11 identify  18 ounce    
                  5 alarm     12 anxiety   19 both     
                  6 health    13 august    20 award    
                  7 discuss   14 sunlight              
  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
  Since there is some randomness used in the SLIP-39 mnemonics
  generation process, we would get a *different* set of words each time
  for the fixed "entropy" `0xFFFF..FF' used in this example (if we
  hadn't manually disabled entropy for `shamir_mnemonic', above), but we
  will *always* derive the same Ethereum account `0x824b..19a1' at the
  specified HD Wallet derivation path.

  ┌────
  │     print( tabulate( [
  │         [ account.crypto, account.path, account.address ]
  │         for group in create_details.accounts
  │         for account in group
  │     ], tablefmt='orgtbl', headers=[ "Crypto", "HD Wallet Path:", "Ethereum Address:" ] ))
  └────

  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   Crypto  HD Wallet Path:   Ethereum Address:                          
  ──────────────────────────────────────────────────────────────────────
   ETH     m/44'/60'/0'/0/0  0x824b174803e688dE39aF5B3D7Cd39bE6515A19a1 
   BTC     m/44'/0'/0'/0/0   bc1qm5ua96hx30snwrwsfnv97q96h53l86ded7wmjl 
   ETH     m/44'/60'/0'/0/1  0x8D342083549C635C0494d3c77567860ee7456963 
   BTC     m/44'/0'/0'/0/1   bc1qwz6v9z49z8mk5ughj7r78hjsp45jsxgzh29lnh 
   ETH     m/44'/60'/0'/0/2  0x52787E24965E1aBd691df77827A3CfA90f0166AA 
   BTC     m/44'/0'/0'/0/2   bc1q690m430qu29auyefarwfrvfumncunvyw6v53n9 
  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━


4.1.5 SLIP-39 Mnemonic to Seed
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌

  Lets prove that we can actually recover the *original* Seed Entropy
  from the SLIP-39 recovery Mnemonics; in this case, we've specified a
  SLIP-39 group_threshold of 2 groups, so we'll use 1 Mnemonic from
  Mine, and 2 from the Fam group:

  ┌────
  │     _,mnem_mine         = grps['Mine']
  │     _,mnem_fam          = grps['Fam']
  │     recseed             = slip39.recover( mnem_mine + mnem_fam[:2] )
  │     recseed_hex         = codecs.encode( recseed, 'hex_codec' ).decode( 'ascii' )
  │     print( tabulate( [
  │         [ f"{len(recseed)*8}-bit Seed:", f"{recseed_hex}" ]
  │     ], tablefmt='orgtbl' ))
  └────

  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   128-bit Seed:  ffffffffffffffffffffffffffffffff 
  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━


4.1.6 SLIP-39 Seed to Address
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌

  And we'll use the same style of code as for the BIP-39 example above,
  to derive the Ethereum address *directly* from this recovered 128-bit
  seed:

  ┌────
  │     slip39_eth_hd       = slip39.account( recseed, 'ETH', path )
  │     print( tabulate( [
  │         [ f"{len(slip39_eth_hd.key)*4}-bit derived key path:", f"{path}" ],
  │         [ "Produces private key: ", f"{slip39_eth_hd.key}" ],
  │         [ "Yields Ethereum address:", f"{slip39_eth_hd.address}" ],
  │     ], tablefmt='orgtbl' ))
  └────

  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
   256-bit derived key path:  m/44'/60'/0'/0/0                                                 
   Produces private key:      6a2ec39aab88ec0937b79c8af6aaf2fd3c909e9a56c3ddd32ab5354a06a21a2b 
   Yields Ethereum address:   0x824b174803e688dE39aF5B3D7Cd39bE6515A19a1                       
  ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
  And we see that we obtain the same Ethereum address `0x824b..1a2b' as
  we originally got from `slip39.create' above.  However, this is *not
  the same* Ethereum wallet address obtained from BIP-39 with exactly
  the same `0xFFFF...FF' Seed Entropy, which was `0xfc20..1B5E'!

  This is due to the fact that BIP-39 does not use the recovered Seed
  Entropy to produce the seed like SLIP-39 does, but applies additional
  one-way hashing of the Mnemonic to produce a 512-bit Seed.


4.2 BIP-39 vs SLIP-39 Key Derivation Summary
────────────────────────────────────────────

  At no time in BIP-39 account derivation is the original 128-bit Seed
  Entropy used (directly) in the derivation of the wallet key.  This
  differs from SLIP-39, which directly uses the 128-bit Seed Entropy
  recovered from the SLIP-39 Shamir's Secret Sharing System recovery
  process to generate each HD Wallet account's private key.

  Furthermore, there is no point in the BIP-39 Seed Entropy to account
  generation where we *could* introduce a known 128-bit seed and produce
  a known Ethereum wallet from it, other than at the very beginning.

  Therefore, our BIP-39 Backup via SLIP-39 strategy must focus on
  backing up the original 128- to 256-bit Seed /Entropy/, *not* the
  output Seed data!


4.3 BIP-39 Backup via SLIP-39
─────────────────────────────

  Here are the two available methods for backing up insecure and
  unreliable BIP-39 Mnemonic phrases, using SLIP-39.

  The first "Emergency Recovery" method allows you to recover your
  BIP-39 generated wallets *without the passphrase*, but does not
  support recovery using hardware wallets; you must output "Paper
  Wallets" and use them to recover the Cryptocurrency funds.

  The second "Best Recovery: Using Recovered BIP-39 Mnemonic Phrase"
  allows us to recover the accounts to /any/ standard BIP-39 hardware
  wallet!  However, the SLIP-39 Mnemonics are *not* compatible with
  standard SLIP-39 wallets like the Trezor "Model T" – you have to use
  the recovered BIP-39 Mnemonic phrase to recover the hardware wallet.


4.3.1 Emergency Recovery: Using Recovered Paper Wallets
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌

  There is one approach which can preserve an original BIP-39
  /generated/ wallet addresses, using SLIP-39 mnemonics.

  It is clumsy, as it preserves the BIP-39 *output* 512-bit stretched
  seed, and the resultant 59-word SLIP-39 mnemonics cannot be used (at
  present) with the Trezor hardware wallet.  They can, however, be used
  to recover the HD wallet private keys without access to the original
  BIP-39 Mnemonic phrase /or passphrase/ – you could generate and
  distribute a set of more secure SLIP-39 Mnemonic phrases, instead of
  trying to secure the original BIP-39 mnemonic + passphrase – without
  abandoning your existing BIP-39 wallets.

  We'll use `slip39.recovery --bip39 ...' to recover the 512-bit
  stretched seed from BIP-39:

  ┌────
  │     ( python3 -m slip39.recovery --bip39 -v \
  │         --mnemonic "zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo wrong" 
  │     ) 2>&1
  └────
  ┌────
  │ 2022-11-11 08:08:04 slip39.recovery  Recovered 512-bit BIP-39 secret from english mnemonic
  │ 2022-11-11 08:08:04 slip39.recovery  Recovered BIP-39 secret; To re-generate SLIP-39 wallet, send it to: python3 -m slip39 --secret -
  │ b6a6d8921942dd9806607ebc2750416b289adea669198769f2e15ed926c3aa92bf88ece232317b4ea463e84b0fcd3b53577812ee449ccc448eb45e6f544e25b6
  └────

  Then we can generate a 59-word SLIP-39 mnemonic set from the 512-bit
  secret:

  ┌────
  │     ( python3 -m slip39.recovery --bip39 \
  │         --mnemonic "zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo wrong" \
  │       | python3 -m slip39 --secret - --no-card -v
  │     ) 2>&1 | tail -20
  └────
  ┌────
  │     2022-11-11 08:08:05 slip39                7 dough     19 lunch     31 elephant  43 liquid    55 tackle    
  │     2022-11-11 08:08:05 slip39                8 careful   20 leaves    32 frozen    44 pajamas   56 rumor     
  │     2022-11-11 08:08:05 slip39                9 expand    21 boring    33 sidewalk  45 evaluate  57 debris    
  │     2022-11-11 08:08:05 slip39               10 secret    22 similar   34 improve   46 oral      58 biology   
  │     2022-11-11 08:08:05 slip39               11 tendency  23 paces     35 hesitate  47 expand    59 purple    
  │     2022-11-11 08:08:05 slip39               12 elephant  24 sheriff   36 craft     48 rapids    
  │     2022-11-11 08:08:05 slip39           6th  1 item      13 screw     25 merchant  37 fawn      49 preach    
  │     2022-11-11 08:08:05 slip39                2 always    14 timely    26 hospital  38 voter     50 glen      
  │     2022-11-11 08:08:05 slip39                3 decision  15 soul      27 scatter   39 brave     51 revenue   
  │     2022-11-11 08:08:05 slip39                4 spider    16 playoff   28 object    40 marathon  52 upstairs  
  │     2022-11-11 08:08:05 slip39                5 acquire   17 pickup    29 daughter  41 apart     53 yelp      
  │     2022-11-11 08:08:05 slip39                6 therapy   18 hobo      30 practice  42 fluff     54 ivory     
  │     2022-11-11 08:08:05 slip39                7 scared    19 acrobat   31 flavor    43 describe  55 cluster   
  │     2022-11-11 08:08:05 slip39                8 ruin      20 greatest  32 manager   44 deploy    56 staff     
  │     2022-11-11 08:08:05 slip39                9 soul      21 makeup    33 pancake   45 flavor    57 lizard    
  │     2022-11-11 08:08:05 slip39               10 sunlight  22 already   34 fawn      46 soul      58 symbolic  
  │     2022-11-11 08:08:05 slip39               11 join      23 entrance  35 walnut    47 cluster   59 gesture   
  │     2022-11-11 08:08:05 slip39               12 swimming  24 predator  36 rich      48 tackle    
  │     2022-11-11 08:08:05 slip39.layout    ETH    m/44'/60'/0'/0/0    : 0xfc2077CA7F403cBECA41B1B0F62D91B5EA631B5E
  │     2022-11-11 08:08:05 slip39.layout    BTC    m/84'/0'/0'/0/0     : bc1qk0a9hr7wjfxeenz9nwenw9flhq0tmsf6vsgnn2
  └────
  This `0xfc20..1B5E' address is the same Ethereum address as is
  recovered on a Trezor using this BIP-39 mnemonic phrase.  Thus, we can
  generate "Paper Wallets" for the desired Cryptocurrency accounts, and
  recover the funds.

  So, this does the job:
  • Uses our original BIP-39 Mnemonic
  • Does not require remembering the BIP-39 passphrase
  • Preserves all of the original wallets

  But:
  • The 59-word SLIP-39 Mnemonics cannot (yet) be imported into the
    Trezor "Model T"
  • The original BIP-39 Mnemonic phrase cannot be recovered, for any
    hardware wallet
  • Must use the SLIP-39 App to generate "Paper Wallets", to recover the
    funds

  So, this is a good "emergency backup" solution; you or your heirs
  would be able to recover the funds with a very high level of security
  and reliability.


4.3.2 Best Recovery: Using Recovered BIP-39 Mnemonic Phrase
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌

  The best solution is to use SLIP-39 to back up the original BIP-39
  Seed /Entropy/ (/not/ the generated Seed), and then later recover that
  Seed Entropy and re-generate the BIP-39 Mnemonic phrase.  You will
  continue to need to remember and use your original BIP-39 passphrase:

  <file:images/BIP-39-backup-entropy.png>

  First, observe that we can recover the 128-bit Seed Entropy from the
  BIP-39 Mnemonic phrase (not the 512-bit generated Seed):
  ┌────
  │     ( python3 -m slip39.recovery --bip39 --entropy -v \
  │         --mnemonic "zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo wrong" 
  │     ) 2>&1
  └────
  ┌────
  │ 2022-11-11 08:08:07 slip39.recovery  Recovered 128-bit BIP-39 secret from english mnemonic
  │ 2022-11-11 08:08:07 slip39.recovery  Recovered BIP-39 secret; To re-generate SLIP-39 wallet, send it to: python3 -m slip39 --secret -
  │ ffffffffffffffffffffffffffffffff
  └────

  Now we generate SLIP-39 Mnemonics to recover the 128-bit Seed Entropy.
  Note that these are 20-word Mnemonics.  However, these are *NOT* the
  wallets we expected!  These are the well-known native SLIP-39 wallets
  from the `0xFFFF...FF' Seed Entropy; not the well-known native BIP-39
  wallets from that Seed Entropy, which generate the Ethereum wallet
  address `0xfc20..1B5E'!  Why not?

  ┌────
  │     ( python3 -m slip39.recovery --bip39 --entropy \
  │         --mnemonic "zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo wrong" \
  │       | python3 -m slip39 --secret - --no-card -v
  │     ) 2>&1 | tail -20
  └────
  ┌────
  │     2022-11-11 08:08:07 slip39                4 skin      11 depend    18 weapon    
  │     2022-11-11 08:08:07 slip39                5 clinic    12 laden     19 true      
  │     2022-11-11 08:08:07 slip39                6 vampire   13 manual    20 breathe   
  │     2022-11-11 08:08:07 slip39                7 curious   14 physics   
  │     2022-11-11 08:08:07 slip39           5th  1 beam       8 rumor     15 knife     
  │     2022-11-11 08:08:07 slip39                2 flexible   9 actress   16 silver    
  │     2022-11-11 08:08:07 slip39                3 decision  10 luxury    17 desktop   
  │     2022-11-11 08:08:07 slip39                4 snake     11 tendency  18 seafood   
  │     2022-11-11 08:08:07 slip39                5 duration  12 snake     19 spark     
  │     2022-11-11 08:08:07 slip39                6 crush     13 fumes     20 dilemma   
  │     2022-11-11 08:08:07 slip39                7 forget    14 change    
  │     2022-11-11 08:08:07 slip39           6th  1 beam       8 bundle    15 peaceful  
  │     2022-11-11 08:08:07 slip39                2 flexible   9 fiscal    16 retreat   
  │     2022-11-11 08:08:07 slip39                3 decision  10 tracks    17 dragon    
  │     2022-11-11 08:08:07 slip39                4 spider    11 picture   18 eraser    
  │     2022-11-11 08:08:07 slip39                5 credit    12 early     19 unusual   
  │     2022-11-11 08:08:07 slip39                6 decent    13 cinema    20 improve   
  │     2022-11-11 08:08:07 slip39                7 mortgage  14 submit    
  │     2022-11-11 08:08:07 slip39.layout    ETH    m/44'/60'/0'/0/0    : 0x824b174803e688dE39aF5B3D7Cd39bE6515A19a1
  │     2022-11-11 08:08:07 slip39.layout    BTC    m/84'/0'/0'/0/0     : bc1q9yscq3l2yfxlvnlk3cszpqefparrv7tk24u6pl
  └────
  Because we must tell `slip39' to that we're using the BIP-39 Mnemonic
  and Seed generation process to derived the wallet addresses from the
  Seed Entropy (not the SLIP-39 standard).  So, we add the
  `-using-bip39' option:

  ┌────
  │     ( python3 -m slip39.recovery --bip39 --entropy \
  │         --mnemonic "zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo wrong" \
  │       | python3 -m slip39 --secret - --no-card -v --using-bip39
  │     ) 2>&1 | tail -20
  └────
  ┌────
  │     2022-11-11 08:08:08 slip39                4 skin      11 modern    18 agency    
  │     2022-11-11 08:08:08 slip39                5 campus    12 window    19 amuse     
  │     2022-11-11 08:08:08 slip39                6 iris      13 stick     20 unusual   
  │     2022-11-11 08:08:08 slip39                7 club      14 welfare   
  │     2022-11-11 08:08:08 slip39           5th  1 taste      8 lair      15 duration  
  │     2022-11-11 08:08:08 slip39                2 regret     9 fiction   16 disaster  
  │     2022-11-11 08:08:08 slip39                3 decision  10 together  17 predator  
  │     2022-11-11 08:08:08 slip39                4 snake     11 bike      18 smith     
  │     2022-11-11 08:08:08 slip39                5 dynamic   12 package   19 genre     
  │     2022-11-11 08:08:08 slip39                6 finger    13 smear     20 username  
  │     2022-11-11 08:08:08 slip39                7 cinema    14 corner    
  │     2022-11-11 08:08:08 slip39           6th  1 taste      8 imply     15 wits      
  │     2022-11-11 08:08:08 slip39                2 regret     9 false     16 remember  
  │     2022-11-11 08:08:08 slip39                3 decision  10 stilt     17 junior    
  │     2022-11-11 08:08:08 slip39                4 spider    11 type      18 writing   
  │     2022-11-11 08:08:08 slip39                5 aquatic   12 apart     19 agency    
  │     2022-11-11 08:08:08 slip39                6 lamp      13 ivory     20 deal      
  │     2022-11-11 08:08:08 slip39                7 inside    14 learn     
  │     2022-11-11 08:08:08 slip39.layout    ETH    m/44'/60'/0'/0/0    : 0xfc2077CA7F403cBECA41B1B0F62D91B5EA631B5E
  │     2022-11-11 08:08:08 slip39.layout    BTC    m/84'/0'/0'/0/0     : bc1qk0a9hr7wjfxeenz9nwenw9flhq0tmsf6vsgnn2
  └────
  And, there we have it – we've recovered exactly the same Ethereum and
  Bitcoin wallets as would a native BIP-39 hardware wallet like a Ledger
  Nano.


◊ 4.3.2.1 Using SLIP-39 App "Backup" Controls

  In the SLIP-39 App, the default Controls presented are to "Backup" a
  BIP-39 recovery phrase.

  In "Seed Source", enter your existing BIP-39 recovery phrase.  In
  "Seed Secret", make sure "Using BIP-39" is selected, and enter your
  BIP-39 passphrase.  This allows us to display the proper wallet
  addresses – we do *not* store your password, or save it as part of the
  SLIP-39 cards!  You will need to remember and use your passphrase
  whenever you use your BIP-39 phrase to initialize a hardware wallet.

  Check that the Recovery needs … Mnemonic Card Groups are correct for
  your application, and hit Save!

  Later, use the "Recover" Controls to get your BIP-39 recovery phrase
  back, from your SLIP-39 cards, whenever you need it.

  Practice this a few times (using the "zoo zoo … wrong" 12-word or "zoo
  zoo … vote" 24-word phrase) until you're confident.  Then, back up
  your real BIP-39 recovery phrase.

  Once you're convinced you can securely and reliably recover your
  BIP-39 phrase any time you need it, we recommend that you destroy your
  original BIP-39 recovery phrase backup(s).  They are dangerous and
  unreliable, and only serve to make your Cryptocurrency accounts *less*
  secure!


5 Building & Installing
═══════════════════════

  The `python-slip39' project is tested under both homebrew:
  ┌────
  │ $ brew install python-tk@3.9
  └────

  and using [the official python.org/downloads installer].

  Either of these methods will get you a `python3' executable running
  version 3.9+, usable for running the `slip39' module, and the
  `slip39.gui' GUI.


[the official python.org/downloads installer]
<https://www.python.org/downloads/>

5.1 The `slip39' Module
───────────────────────

  To build the wheel and install `slip39' manually:
  ┌────
  │ $ git clone git@github.com:pjkundert/python-slip39.git
  │ $ make -C python-slip39 install
  └────


  To install from Pypi, including the optional requirements to run the
  PySimpleGUI/tkinter GUI, support serial I/O, and to support creating
  encrypted BIP-38 and Ethereum JSON Paper Wallets:
  ┌────
  │ $ python3 -m pip install slip39[gui,wallet,serial]
  └────


5.2 The `slip39' GUI
────────────────────

  To install from Pypi, including the optional requirements to run the
  PySimpleGUI/tkinter GUI:
  ┌────
  │ $ python3 -m pip install slip39[gui]
  └────


  Then, there are several ways to run the GUI:
  ┌────
  │ $ python3 -m slip39.gui     # Execute the python slip39.gui module main method
  │ $ slip39-gui                # Run the main function provided by the slip39.gui module
  └────


5.2.1 The macOS/win32 `SLIP-39.app' GUI
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌

  You can build the native macOS and win32 `SLIP-39.app' App.

  This requires the official [python.org/downloads] installer; the
  homebrew python-tk@3.9 will not work for building the native app using
  either `PyInstaller'. (The `py2app' approach doesn't work in either
  version of Python).

  ┌────
  │ $ git clone git@github.com:pjkundert/python-slip39.git
  │ $ make -C python-slip39 app
  └────


[python.org/downloads] <https://python.org/downloads>


5.2.2 The Windows 10 `SLIP-39' GUI
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌

  Install Python from <https://python.org/downloads>, and the [Microsoft
  C++ Build Tools] via the Visual Studio Installer (required for
  installing some `slip39' package dependencies).

  To run the GUI, just install `slip39' package from Pypi using pip,
  including the `gui' and `wallet' options.  Building the Windows
  `SLIP-39' executable GUI application requires the `dev' option.
  ┌────
  │ PS C:\Users\IEUser> pip install slip39[gui,wallet,dev]
  └────


  To work with the [python-slip39 Git repo on Github], you'll also need
  to install [Git from git-scm.com]. Once installed, run "Git bash", and
  ┌────
  │ $ ssh-keygen.exe -t ed25519
  └────

  to create an `id_ed25519.pub' SSH identity, and import it into your
  Git Settings SSH keys.  Then,
  ┌────
  │ $ mkdir src
  │ $ cd src
  │ $ git clone git@github.com:pjkundert/python-slip39.git
  └────


[Microsoft C++ Build Tools]
<https://visualstudio.microsoft.com/visual-cpp-build-tools>

[python-slip39 Git repo on Github]
<https://github.com/pjkundert/python-slip39.git>

[Git from git-scm.com] <https://git-scm.com/download/win>

◊ 5.2.2.1 Code Signing

  The MMC (Microsoft Management Console) is used to store your
  code-signing certificates.  See [stackoverflow.com] for how to enable
  its Certificate management.


  [stackoverflow.com]
  <https://stackoverflow.com/questions/19879812/signing-exe-with-cer-file-what-is-my-certificates-name-that-signtool-exe-is>


6 Licensing
═══════════

  Each installation of the SLIP-39 App requires an Ed25519 "Agent"
  identity, and cryptographically signed license(s) to activate various
  python-slip39 features.  No license is required to use basic features;
  advanced features require a license.


6.1 Create an Ed25519 "Agent" Key
─────────────────────────────────

  The Ed25519 signing "Agent" identity is loaded at start-up, and (if
  necessary) is created automatically on first execution.  This is
  similar to the `ssh-keygen -t ed25519' procedure.

  Each separate installation must have a
  ~/.crypto-licensing/python-slip39.crypto-keypair.  This contains the
  licensing "Agent" credentials: a passphrase-encrypted Ed25519 private
  key, and a self-signed public key.  This shows that we actually had
  access to the private key and used it to create a signature for the
  claimed public key and the supplied encrypted private key – proving
  that the public key is valid, and associated with the encrypted
  private key.


6.2 Validating an Advanced Feature License
──────────────────────────────────────────

  When an advanced feature is used, all available
  `python-slip39.crypto-license' files are loaded.  They are examined,
  and if a license is found that is:

  • Assigned to this Agent and Machine-ID
  • Contains the required license authorizations

  then the functionality is allowed to proceed.

  If no license is found, instructions on how to obtain a license for
  this Agent on this Machine-ID will be displayed.

  If you've already obtained a "master" license on your primary
  machine's SLIP-39 installation, you can use it to issue a sub-license
  to this installation (eg. for your air-gapped cryptocurrency
  management machine).

  Otherwise, a URL is displayed at which the required "master" license
  can be issued.


6.2.1 Get a sub-license From Your "master" License
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌

  Typically, you'll be using python-slip39's advanced features on an
  air-gapped computer.  You do not want to visit websites from this
  computer.  So, you obtain a sub-license from your primary computer's
  python-slip39 installation, and place it on your secure air-gapped
  computer (eg. using a USB stick).

  Take note of the secondary machine's Agent ID (pubkey) and Machine ID.
  On your primary computer (with the "master" license), run:
  ┌────
  │ python3 -m slip39.sublicense <agent-pubkey> <machine-id>
  └────


  Take the output, and place it in the file
  `~/.crypto-licensing/python-slip39.crypto-license' on your air-gapped
  computer.


6.2.2 Obtaining an Advanced Feature "master" License
╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌

  On your primary computer, open the provided URL in a browser.  The URL
  contains the details of the advanced feature desired.

  This URL's web page will request an Ed25519 "Agent" public key to
  issue your "master" license to.  This should be your primary user
  account's Ed25519 "Agent" public key – this master "Agent" will be
  issuing sub-licenses to any of your other SLIP-39 installations.  You
  will be redirected to a URL that is unique to the advanced feature
  plus your Agent ID.

  An invoice will be generated with unique Bitcoin, Ethereum and perhaps
  other cryptocurrency addresses.  Pay the required amount of
  cryptocurrency to one of the provided wallet addresses.  Within a few
  seconds, the cryptocurrency transfer will be confirmed.

  Once the payment for the advanced feature is confirmed, the URL
  including your agent ID will always allow you to re-download the
  license.  It is only usable by your Agent ID to issue sub-licenses to
  your python-slip39 installations on your machines.


7 Dependencies
══════════════

  Internally, python-slip39 project uses Trezor's
  [python-shamir-mnemonic] to encode the seed data to SLIP-39 phrases,
  [python-hdwallet] to convert seeds to ETH, BTC, LTC and DOGE wallets,
  and the Ethereum project's [eth-account] to produce encrypted JSON
  wallets for specified Ethereum accounts.


[python-shamir-mnemonic]
<https://gihub.com/trezor/python-shamir-mnemonic.git>

[python-hdwallet] <https://github.com/meherett/python-hdwallet.git>

[eth-account] <https://github.com/ethereum/eth-account>

7.1 The `python-shamir-mnemonic' API
────────────────────────────────────

  To use it directly, obtain , and install it, or run `python3 -m pip
  install shamir-mnemonic'.

  ┌────
  │ $ shamir create custom --group-threshold 2 --group 1 1 --group 1 1 --group 2 5 --group 3 6
  │ Using master secret: 87e39270d1d1976e9ade9cc15a084c62
  │ Group 1 of 4 - 1 of 1 shares required:
  │ merit aluminum acrobat romp capacity leader gray dining thank rhyme escape genre havoc furl breathe class pitch location render beard
  │ Group 2 of 4 - 1 of 1 shares required:
  │ merit aluminum beard romp briefing email member flavor disaster exercise cinema subject perfect facility genius bike include says ugly package
  │ Group 3 of 4 - 2 of 5 shares required:
  │ merit aluminum ceramic roster already cinema knit cultural agency intimate result ivory makeup lobe jerky theory garlic ending symbolic endorse
  │ merit aluminum ceramic scared beam findings expand broken smear cleanup enlarge coding says destroy agency emperor hairy device rhythm reunion
  │ merit aluminum ceramic shadow cover smith idle vintage mixture source dish squeeze stay wireless likely privacy impulse toxic mountain medal
  │ merit aluminum ceramic sister duke relate elite ruler focus leader skin machine mild envelope wrote amazing justice morning vocal injury
  │ merit aluminum ceramic smug buyer taxi amazing marathon treat clinic rainbow destroy unusual keyboard thumb story literary weapon away move
  │ Group 4 of 4 - 3 of 6 shares required:
  │ merit aluminum decision round bishop wrote belong anatomy spew hour index fishing lecture disease cage thank fantasy extra often nail
  │ merit aluminum decision scatter carpet spine ruin location forward priest cage security careful emerald screw adult jerky flame blanket plot
  │ merit aluminum decision shaft arcade infant argue elevator imply obesity oral venture afraid slice raisin born nervous universe usual racism
  │ merit aluminum decision skin already fused tactics skunk work floral very gesture organize puny hunting voice python trial lawsuit machine
  │ merit aluminum decision snake cage premium aide wealthy viral chemical pharmacy smoking inform work cubic ancestor clay genius forward exotic
  │ merit aluminum decision spider boundary lunar staff inside junior tendency sharp editor trouble legal visual tricycle auction grin spit index
  └────
