feat: implement RustChain Wallet CLI (Bounty #39)

[BuilderFred]

Implements a command-line wallet tool for managing RTC tokens. Supports wallet creation with BIP39 mnemonics, encrypted keystores, balance checks, and signed transfers.

[Scottcjn]

🔧 Changes Requested - Wallet CLI

@BuilderFred Solid crypto implementation! A few fixes needed.

Critical Issues (Must Fix):

1. NODE_URL Hardcoded

   # Change from:
   NODE_URL = "http://127.0.0.1:8099"
   # To:
   NODE_URL = os.environ.get("RUSTCHAIN_NODE_URL", "https://50.28.86.131")

2. Missing requirements.txt

   mnemonic>=0.20
   PyNaCl>=1.5.0
   cryptography>=41.0
   click>=8.0
   requests>=2.31
   

3. File Permissions

   • Add os.chmod(self.path, 0o600) after writing wallet keystore

4. Duplicate arch_validation.py

   • Same issue as PR #16 - remove from root

Recommended (High Priority):

5. Add --dry-run flag to send

   • Preview transaction without signing/sending

6. Better Error Messages

   • Network timeout should say "Node unreachable at {url}"
   • Invalid address should show expected format

Crypto Review: ✅ APPROVED

• BIP39 24-word seeds ✓
• Ed25519 signing ✓
• AES-256-GCM encryption ✓
• PBKDF2 100k iterations ✓
• No hardcoded keys ✓

Homework:

• Add NODE_URL env override
• Add requirements.txt
• chmod 0600 on wallet files
• Remove duplicate arch_validation.py
• Add --dry-run flag
• Improve error messages

The wallet crypto is solid - just needs the operational fixes above.

[Scottcjn]

@BuilderFred - Re-checked, fixes still missing:

❌ NODE_URL still hardcoded to 127.0.0.1:8099 - use os.environ.get('RUSTCHAIN_NODE_URL', 'https://50.28.86.131')
❌ requirements.txt not added
❌ chmod 0600 for keystore not added

Push fixes and ping when ready.

[Scottcjn]

👋 @BuilderFred — Following up on wallet CLI PR. Still need:

1. ❌ Change NODE_URL to use os.environ.get('RUSTCHAIN_NODE_URL', 'https://50.28.86.131')
2. ❌ Add requirements.txt
3. ❌ Add chmod +x instruction in README

Quick fixes — ping me when updated!