# pyhdwallet v1.0.2

A command-line tool for generating and recovering HD wallets (BIP39) with support for Ethereum, Solana, and Bitcoin. Features offline operation, PGP encryption, and multi-chain address derivation.

## Table of Contents

- [Features](#features)
- [Installation](#installation)
- [Quick Start](#quick-start)
- [Commands](#commands)
  - [fetchkey](#fetchkey)
  - [gen](#gen)
  - [recover](#recover)
  - [test](#test)
- [Examples](#examples)
- [Security](#security)
- [Troubleshooting](#troubleshooting)
- [Changelog](#changelog)

## Features

- **Offline-first**: Generate and recover wallets without internet access.
- **Multi-chain support**: Derive addresses for Ethereum, Solana, and Bitcoin.
- **PGP encryption**: Securely encrypt sensitive data (mnemonics, private keys) to PGP public keys.
- **Flexible input**: Accept BIP39 mnemonics or hex seeds.
- **BIP39 passphrase support**: Optional passphrase for additional security.
- **Private key export**: Export derived private keys in encrypted payloads.
- **Solana profiles**: Multiple derivation paths for Solana compatibility.
- **Self-testing**: Built-in tests to verify functionality.
- **Secure mode**: Optional paranoid mode with memory zeroing, temp files, and no output printing for high-security use.

## Installation

### Prerequisites

- Python 3.11 or higher
- Virtual environment (recommended)

### Setup

1. Clone or download the repository.
2. Create a virtual environment:

   ```bash
   python -m venv .venv
   source .venv/bin/activate  # On Windows: .venv\Scripts\activate
   ```

3. Install dependencies:

   ```bash
   pip install -r requirements.txt
   ```

### Dependencies

- `bip-utils`: BIP39 and derivation logic
- `PGPy`: PGP encryption
- `PyNaCl` & `base58`: Solana private key handling (optional for Solana private key export)

## Quick Start

1. Generate a new wallet:

   ```bash
   python ./src/pyhdwallet.py gen --chains ethereum solana --addresses 3
   ```

2. Recover from a mnemonic:

   ```bash
   python ./src/pyhdwallet.py recover --mnemonic "abandon abandon ... about" --chains bitcoin
   ```

3. Fetch a PGP key:

   ```bash
   python ./src/pyhdwallet.py fetchkey "https://example.com/key.asc" --out mykey.asc
   ```

4. Use secure mode for high-security operations:

   ```bash
   python ./src/pyhdwallet.py gen --secure-mode --pgp-pubkey-file key.asc --chains ethereum --addresses 1
   ```

5. Run tests:

   ```bash
   python ./src/pyhdwallet.py test
   ```

## Commands

### fetchkey

Download and verify a PGP public key from a URL.

**Usage:**

```bash
python ./src/pyhdwallet.py fetchkey <url> [--out FILE] [--timeout SECONDS]
```

**Options:**

- `url`: URL to the ASCII-armored PGP key
- `--out FILE`: Save the key to a file
- `--timeout SECONDS`: Request timeout (default: 15)
- `--secure-mode`: Enable secure mode (temp files, no extra output)

**Example:**

```bash
python ./src/pyhdwallet.py fetchkey "https://keys.openpgp.org/pks/lookup?op=get&search=user@example.com" --out key.asc
```

### gen

Generate a new BIP39 mnemonic and derive addresses.

**Usage:**

```bash
python ./src/pyhdwallet.py gen [options]
```

**Options:**

- `--words {12,15,18,21,24}`: Number of mnemonic words (default: 12)
- `--dice-rolls "1 2 3 ..."`: Space-separated dice rolls for entropy
- `--passphrase PASSPHRASE`: BIP39 passphrase
- `--passphrase-hint HINT`: Hint for the passphrase
- `--chains {ethereum,solana,bitcoin}`: Chains to derive (default: all)
- `--addresses N`: Number of addresses per chain (default: 5)
- `--sol-profile {phantom_bip44change,phantom_bip44,phantom_deprecated,solana_bip39_first32}`: Solana derivation profile
- `--output {text,json}`: Output format (default: text)
- `--file FILE`: Save output to file
- `--pgp-pubkey-file FILE`: Encrypt payload to PGP key
- `--pgp-ignore-usage-flags`: Ignore PGP key usage flags
- `--export-private`: Include private keys in encrypted payload
- `--include-source`: Include mnemonic in encrypted payload
- `--unsafe-print`: Print mnemonic even when encrypting
- `--secure-mode`: Enable secure mode (no printing, temp files, memory zeroing)

**Examples:**

```bash
# Basic generation
python ./src/pyhdwallet.py gen

# With secure mode
python ./src/pyhdwallet.py gen --secure-mode --pgp-pubkey-file key.asc

# With passphrase and encryption
python ./src/pyhdwallet.py gen --passphrase "mysecret" --pgp-pubkey-file key.asc --export-private

# JSON output to file
python ./src/pyhdwallet.py gen --chains ethereum --addresses 10 --output json --file wallet.json
```

### recover

Derive addresses from an existing mnemonic or seed.

**Usage:**

```bash
python ./src/pyhdwallet.py recover [options]
```

**Options:** Same as `gen`, plus:

- `--mnemonic MNEMONIC`: BIP39 mnemonic phrase
- `--seed HEX_SEED`: 128-character hex seed
- `--interactive`: Prompt for mnemonic/seed interactively
- `--secure-mode`: Enable secure mode (no printing, temp files, memory zeroing)

**Examples:**

```bash
# From mnemonic
python ./src/pyhdwallet.py recover --mnemonic "abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon about" --chains ethereum solana

# Interactive input
python ./src/pyhdwallet.py recover --interactive --chains bitcoin

# From seed
python ./src/pyhdwallet.py recover --seed "0123456789abcdef..." --chains solana
```

### test

Run minimal self-tests to verify functionality.

**Usage:**

```bash
python ./src/pyhdwallet.py test [--secure-mode]
```

**Options:**

- `--secure-mode`: Enable secure mode (no extra output)

**Output:** Success/failure messages for derivation tests.

## Examples

### 1. Generate and Encrypt a New Wallet

```bash
# Generate with encryption
python ./src/pyhdwallet.py gen --pgp-pubkey-file key.asc --include-source --export-private --chains ethereum solana --addresses 5

# Decrypt the output later with GPG
echo "-----BEGIN PGP MESSAGE-----..." | gpg -d
```

### 2. Recover from Mnemonic with Passphrase

```bash
python ./src/pyhdwallet.py recover --mnemonic "word1 word2 ... word12" --passphrase "mypass" --chains ethereum --addresses 10 --output json
```

### 3. Fetch and Use PGP Key

```bash
# Fetch key
python ./src/pyhdwallet.py fetchkey "https://example.com/pubkey.asc" --out mykey.asc

# Use in secure mode
python ./src/pyhdwallet.py fetchkey --secure-mode "https://example.com/pubkey.asc"
```

### 4. High-Security Operations with Secure Mode

```bash
# Generate without printing sensitive data
python ./src/pyhdwallet.py gen --secure-mode --pgp-pubkey-file key.asc --chains ethereum --addresses 1

# Recover in secure mode
python ./src/pyhdwallet.py recover --secure-mode --interactive --pgp-pubkey-file key.asc --export-private
```

# Use in recovery

python ./src/pyhdwallet.py recover --interactive --pgp-pubkey-file mykey.asc --export-private

```

### 4. Solana-Specific Derivation

```bash
python ./src/pyhdwallet.py gen --chains solana --sol-profile phantom_bip44change --addresses 3
```

## Security

- **Offline operation**: `gen`, `recover`, and `test` commands block network access.
- **No plaintext secrets**: Mnemonics and private keys are never printed unless encrypted or `--unsafe-print` is used.
- **PGP encryption**: Use for secure storage of sensitive data.
- **Secure mode**: Use `--secure-mode` for paranoid operations—suppresses output, uses temp files with auto-deletion, and zeros memory.
- **Passphrase handling**: Passphrases are not stored; only hints are included.
- **Private key export**: Only export what's needed; treat encrypted payloads as sensitive.
- **File permissions**: Output files are set to owner-only (0o600) for security.
- **Memory zeroing**: In secure mode, sensitive variables are cleared after use.
- **Best practices**:
  - Use `--interactive` to avoid command-line history exposure.
  - Use `--secure-mode` for high-risk operations.
  - Verify PGP fingerprints out-of-band.
  - Run on trusted, offline machines.

## Troubleshooting

- **Missing dependencies**: Run `pip install -r requirements.txt`
- **Network errors in offline modes**: Ensure no internet access; the tool blocks it.
- **Invalid mnemonic**: Check word count and spelling.
- **PGP decryption fails**: Ensure you have the correct private key.
- **Secure mode issues**: Ensure temp files are deleted; check permissions on output files.
- **Version check**: Run `python ./src/pyhdwallet.py --version`

## Changelog

- **v1.0.2**: Security patches - added --secure-mode, memory zeroing, file permission fixes, auto-deletion in secure mode, sanitized errors.
- **v1.0.1**: Renamed to pyhdwallet, added --version flag, updated documentation, excluded _toDelete in .gitignore.
- **v1.0.0**: Initial release with gen, recover, fetchkey, and test commands.