Kaspa Wallet

SKILL.md

---
name: Kaspa Wallet
description: Send and receive KAS cryptocurrency. Check balances, send payments, generate wallets.
---

# Kaspa Wallet CLI

A standalone command-line wallet for the Kaspa blockchain network.

## Installation

```bash
python3 install.py
```

**Requirements:** Python 3.8+ with pip. Works on macOS, Linux, Windows.

**Troubleshooting install:**
- If pip fails: `pip install kaspa` manually, or try `KASPA_PYTHON=python3.12 python3 install.py`
- If venv missing: `sudo apt install python3-venv` (Ubuntu/Debian)
- To reinstall: `rm -rf .venv && python3 install.py`

## Environment Variables

**Required (one of):**
```bash
export KASPA_PRIVATE_KEY="64-character-hex-string"
# OR
export KASPA_MNEMONIC="your twelve or twenty four word seed phrase"
```

**Optional:**
```bash
export KASPA_NETWORK="mainnet"              # mainnet (default), testnet-10
export KASPA_RPC_URL="wss://..."            # Custom RPC endpoint
export KASPA_RPC_CONNECT_TIMEOUT_MS="30000" # Connection timeout (default: 15000)
```

## Commands

All commands output JSON. Exit code 0 = success, 1 = error.

### Check Balance

```bash
./kaswallet.sh balance                    # Your wallet balance
./kaswallet.sh balance kaspa:qrc8y...     # Any address balance
```

**Output:**
```json
{"address": "kaspa:q...", "balance": "1.5", "sompi": "150000000", "network": "mainnet"}
```

### Send KAS

```bash
./kaswallet.sh send <address> <amount>           # Send specific amount
./kaswallet.sh send <address> max                # Send entire balance
./kaswallet.sh send <address> <amount> priority  # Priority fee tier
```

**Output (success):**
```json
{"status": "sent", "txid": "abc123...", "from": "kaspa:q...", "to": "kaspa:q...", "amount": "0.5", "fee": "0.0002"}
```

**Output (error):**
```json
{"error": "Storage mass exceeds maximum", "errorCode": "STORAGE_MASS_EXCEEDED", "hint": "...", "action": "consolidate_utxos"}
```

### Network Info

```bash
./kaswallet.sh info
```

**Output:**
```json
{"network": "mainnet", "url": "wss://...", "blocks": 12345678, "synced": true, "version": "1.0.0"}
```

### Fee Estimates

```bash
./kaswallet.sh fees
```

**Output:**
```json
{"network": "mainnet", "low": {"feerate": 1.0, "estimatedSeconds": 60}, "economic": {...}, "priority": {...}}
```

### Generate New Wallet

```bash
./kaswallet.sh generate-mnemonic
```

**Output:**
```json
{"mnemonic": "word1 word2 word3 ... word24"}
```

### Payment URI

```bash
./kaswallet.sh uri                          # Your address
./kaswallet.sh uri kaspa:q... 1.5 "payment" # With amount and message
```

## Error Handling

All errors return JSON with structured information:

| errorCode | Meaning | Resolution |
|-----------|---------|------------|
| `STORAGE_MASS_EXCEEDED` | Amount too small for current UTXOs | Send `max` to yourself first to consolidate |
| `NO_UTXOS` | No spendable outputs | Wait for confirmations or fund wallet |
| `INSUFFICIENT_FUNDS` | Balance too low | Check balance, reduce amount |
| `RPC_TIMEOUT` | Network slow | Retry or increase timeout |
| `NO_CREDENTIALS` | Missing wallet key | Set KASPA_PRIVATE_KEY or KASPA_MNEMONIC |
| `SDK_NOT_INSTALLED` | Kaspa SDK missing | Run `python3 install.py` |

## Common Workflows

### Consolidate UTXOs (Fix Storage Mass Error)

When sending fails with `STORAGE_MASS_EXCEEDED`:

```bash
# 1. Get your address
./kaswallet.sh balance
# Returns: {"address": "kaspa:qYOUR_ADDRESS...", ...}

# 2. Send max to yourself (consolidates UTXOs)
./kaswallet.sh send kaspa:qYOUR_ADDRESS... max

# 3. Now send the original amount (will work)
./kaswallet.sh send kaspa:qRECIPIENT... 0.5
```

### Check Transaction Status

After sending, use the `txid` to verify on a block explorer:
- Mainnet: `https://explorer.kaspa.org/txs/{txid}`
- Testnet: `https://explorer-tn10.kaspa.org/txs/{txid}`

### Switch Networks

```bash
# Testnet
export KASPA_NETWORK="testnet-10"
./kaswallet.sh info

# Back to mainnet
export KASPA_NETWORK="mainnet"
./kaswallet.sh info
```

## Units

- **KAS**: Human-readable unit (e.g., 1.5 KAS)
- **sompi**: Smallest unit, 1 KAS = 100,000,000 sompi

All command inputs accept KAS. Outputs include both KAS and sompi where relevant.

## Security Notes

- Private keys and mnemonics are passed via environment variables only
- Never log or expose these values
- The wallet does not store credentials on disk
- Each command establishes a fresh RPC connection

## Examples for Agents

```bash
# Check if wallet is configured and has funds
./kaswallet.sh balance
# Parse: if balance > 0, wallet is ready

# Send payment with error handling
./kaswallet.sh send kaspa:recipient... 1.0
# If errorCode == "STORAGE_MASS_EXCEEDED":
#   Run: ./kaswallet.sh send YOUR_ADDRESS max
#   Then retry original send

# Verify network connectivity
./kaswallet.sh info
# Check: synced == true before sending
```