### Install GnuPG for OpenPGP Encryption

Source: https://github.com/ledgerhq/blue-loader-python/blob/master/ledgerblue/HowToRecover.md

Install the GnuPG package to enable encryption of backup files using OpenPGP.

```shell
apt-get install gnupg
```

--------------------------------

### Install libsecp256k1 on MacOS

Source: https://github.com/ledgerhq/blue-loader-python/blob/master/README.md

Installs necessary utilities on MacOS for building the custom secp256k1 package. This step is a prerequisite for the secp256k1 installation on MacOS.

```bash
brew install libtool
```

--------------------------------

### Install Ledgerblue Documentation Dependencies

Source: https://github.com/ledgerhq/blue-loader-python/blob/master/README.md

Installs the necessary Python packages for generating Ledgerblue documentation. This command should be run from the top of the Git repository.

```bash
pip install .[doc]
```

--------------------------------

### Install Ledgerblue in a Virtual Environment

Source: https://github.com/ledgerhq/blue-loader-python/blob/master/README.md

Installs the ledgerblue package within a Python virtual environment. Ensure you activate the environment before installing.

```bash
python3 -m venv ledger
source ledger/bin/activate
pip install ledgerblue
```

--------------------------------

### Install libsecp256k1 with ECDH Support

Source: https://github.com/ledgerhq/blue-loader-python/blob/master/README.md

Installs the libsecp256k1 Python bindings with experimental ECDH support. This requires specific environment variables to be set.

```bash
SECP_BUNDLED_EXPERIMENTAL=1 pip --no-cache-dir install --no-binary secp256k1 secp256k1
```

--------------------------------

### Generate Ledgerblue HTML Documentation

Source: https://github.com/ledgerhq/blue-loader-python/blob/master/README.md

Generates the HTML documentation for Ledgerblue locally. This command should be executed from the top of the Git repository after installing dependencies.

```bash
(cd doc/ && make html)
```

--------------------------------

### Execute recoverRestore.py Script

Source: https://github.com/ledgerhq/blue-loader-python/blob/master/ledgerblue/HowToRecover.md

Example of how to execute the `recoverRestore.py` script with mandatory arguments and optional GPG email.

```shell
python3 -m ledgerblue.recoverRestore --rootPrivateKey 0d990d0c41d955a5c63c0e647f7b82a1b383bf645d140f5edffbb79786323d43 -c conf.json -s "Backup_1.json.gpg" "Backup_2.json.gpg" --gpg john.doe@mail.com
```

--------------------------------

### Install PCSC Support for NFC Communication

Source: https://github.com/ledgerhq/blue-loader-python/blob/master/README.md

Installs PCSC development libraries and the pyscard Python package on Linux for NFC communication with Ledger devices.

```bash
apt install libpcsclite-dev
pip3 install pyscard
```

--------------------------------

### Decrypted Ledger Recover Backup File Content

Source: https://github.com/ledgerhq/blue-loader-python/blob/master/ledgerblue/HowToRecover.md

Example JSON structure of a decrypted backup file, showing fields like commitments, hash, index, point, share, and words_number.

```json
{
    "Backup 1": {
        "commitments": "",
        "hash": "",
        "index": "",
        "point": "",
        "public_key": "",
        "share": "",
        "share_commit": "",
        "words_number": 24
    }
}
```

--------------------------------

### Verify GPG Key

Source: https://github.com/ledgerhq/blue-loader-python/blob/master/ledgerblue/HowToRecover.md

List your GPG keys to verify that the key pair was generated successfully.

```shell
gpg --list-keys
```

--------------------------------

### Configure Udev Permissions for Ledger Devices

Source: https://github.com/ledgerhq/blue-loader-python/blob/master/README.md

Adds udev rules to `/etc/udev/rules.d/` to grant access to Ledger devices on Linux. Replace `<UNIX username>` with your actual username.

```udev
SUBSYSTEMS=="usb", ATTRS{idVendor}=="2c97", MODE="0660", TAG+="uaccess", TAG+="udev-acl" OWNER="<UNIX username>"

KERNEL=="hidraw*", ATTRS{idVendor}=="2c97", MODE="0660" OWNER="<UNIX username>"
```

--------------------------------

### Execute Ledger Recover Backup Script

Source: https://github.com/ledgerhq/blue-loader-python/blob/master/ledgerblue/HowToRecover.md

Command to execute the recoverBackup script with mandatory arguments, configuration file, and GPG encryption.

```shell
python3 -m ledgerblue.recoverBackup --rootPrivateKey 0d990d0c41d955a5c63c0e647f7b82a1b383bf645d140f5edffbb79786323d43 -c conf.json --gpg john.doe@mail.com
```

--------------------------------

### Generate GPG Key Pair

Source: https://github.com/ledgerhq/blue-loader-python/blob/master/ledgerblue/HowToRecover.md

Generate a new GPG key pair. Follow the on-screen prompts to complete the process.

```shell
gpg --gen-key
```

--------------------------------

### Configuration File for Ledger Recover Backup

Source: https://github.com/ledgerhq/blue-loader-python/blob/master/ledgerblue/HowToRecover.md

This JSON file defines the user information, backup details, and keys for orchestrator and providers required by the recoverBackup script.

```json
{
    "user_info":
    {
        "first_name": "John",
        "last_name": "Doe",
        "birth": "12 January 1980",
        "city": "PARIS"
    },
    "backup_info":
    {
        "backup_id": "70d087ee73844c739b009db405113af8",
        "backup_name": "Ledger wallet backup"
    },
    "orchestrator":
    {
        "key": ""
    },
    "providers": [
        {
            "name" : "Backup_1",
            "key" : ""
        },
        {
            "name" : "Backup_2",
            "key" : ""
        },
        {
            "name" : "Backup_3",
            "key" : ""
        }
    ]
}
```

--------------------------------

### Set Custom Certificate Authority

Source: https://github.com/ledgerhq/blue-loader-python/blob/master/ledgerblue/HowToRecover.md

Execute the `recoverSetCA.py` script to set a custom Certificate Authority on the device. The device must be in recovery mode. Ensure the `--name` and `--caPublicKey` arguments are provided.

```python
python3 -m ledgerblue.recoverSetCA --name "Recover test CA" --caPublicKey 040c09e45d01494ede4bb0d814e593a964ef9324cd48f7389b9fbf242348274fda4543c204f5913b06647fc829653a5abf6d321b91f5842c9742022bf7120dff38
```

--------------------------------

### Decrypt Ledger Recover Backup File

Source: https://github.com/ledgerhq/blue-loader-python/blob/master/ledgerblue/HowToRecover.md

Command to decrypt a GPG-encrypted backup file using gpg.

```shell
gpg --output Backup_1.json --decrypt Backup_1.json.gpg
```

--------------------------------

### Set GPG Key Trust Level

Source: https://github.com/ledgerhq/blue-loader-python/blob/master/ledgerblue/HowToRecover.md

Set the trust level for your GPG key to the maximum (5). This requires entering the GPG prompt and using the 'trust' command.

```shell
gpg --edit-key <KEY_ID>
gpg > trust
```

--------------------------------

### Generate Certificate Authority Keys

Source: https://github.com/ledgerhq/blue-loader-python/blob/master/ledgerblue/HowToRecover.md

Generate a pair of Certificate Authority keys using the Secp256k1 curve. The private key must be kept secure for future backup or restore operations.

```shell
Public key : 040c09e45d01494ede4bb0d814e593a964ef9324cd48f7389b9fbf242348274fda4543c204f5913b06647fc829653a5abf6d321b91f5842c9742022bf7120dff38
Private key: 0d990d0c41d955a5c63c0e647f7b82a1b383bf645d140f5edffbb79786323d43
```

--------------------------------

### Delete App from BOLOS Device

Source: https://github.com/ledgerhq/blue-loader-python/blob/master/doc/source/scripts.rst

Deletes a specified application from a connected Ledger Nano S device using the command line. Ensure the device is in the dashboard application before execution.

```bash
python -m ledgerblue.deleteApp --targetId 0x31100002 --appName "Hello World"
```

--------------------------------

### Delete Custom Certificate Authority Script

Source: https://github.com/ledgerhq/blue-loader-python/blob/master/ledgerblue/HowToRecover.md

Execute the `recoverDeleteCA.py` script to remove a custom Certificate Authority. Ensure the device is in recovery mode and provide the mandatory `--name` and `--caPublicKey` arguments. Optional arguments like `--issuerPublicKey`, `--rootPrivateKey`, and `--targetId` can also be specified.

```shell
python3 -m ledgerblue.recoverDeleteCA --name "Recover test CA" --caPublicKey 040c09e45d01494ede4bb0d814e593a964ef9324cd48f7389b9fbf242348274fda4543c204f5913b06647fc829653a5abf6d321b91f5842c9742022bf7120dff38
```

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