Kaspa Wallet Skill

Simple self-custody wallet for Kaspa blockchain.

Overview

┌─────────────────────────────────────────────────────────┐
│                     KASPA WALLET                        │
├─────────────────────────────────────────────────────────┤
│  ┌─────────────┐  ┌─────────────┐  ┌─────────────────┐ │
│  │   Balance   │  │    Send     │  │  Payment URIs   │ │
│  │   Check     │  │    KAS      │  │   Generator     │ │
│  └─────────────┘  └─────────────┘  └─────────────────┘ │
│           │                │                   │        │
│           └────────────────┴───────────────────┘        │
│                         │                               │
│              ┌──────────▼──────────┐                    │
│              │   Kaspa Python SDK  │                    │
│              │   (wRPC Client)     │                    │
│              └─────────────────────┘                    │
│                         │                               │
│         ┌───────────────┼───────────────┐               │
│         ▼               ▼               ▼               │
│    ┌─────────┐    ┌──────────┐    ┌──────────┐         │
│    │ Mainnet │    │ Testnet  │    │  Custom  │         │
│    │  wRPC   │    │   wRPC   │    │   RPC    │         │
│    └─────────┘    └──────────┘    └──────────┘         │
└─────────────────────────────────────────────────────────┘

Features

Feature	Description
Send KAS	Transfer KAS to any Kaspa address
Balance Check	Check balance of any address
Payment URIs	Generate kaspa: payment request URIs
Fee Estimates	Get current network fee tiers
Network Info	Check node sync status and blocks
Wallet Generation	Generate new mnemonic phrases

Quick Start

Installation

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

CLI Usage

# Check balance
./kaswallet.sh balance
./kaswallet.sh balance kaspa:qrc8y...

# Send payment
./kaswallet.sh send kaspa:qrc8y... 0.5
./kaswallet.sh send kaspa:qrc8y... max

# Generate payment URI
./kaswallet.sh uri kaspa:q... 1.5 "coffee payment"

# Network info
./kaswallet.sh info

# Fee estimates
./kaswallet.sh fees

# Generate new wallet
./kaswallet.sh generate-mnemonic

Payment URI Format

Architecture

kaspa-wallet/
├── SKILL.md
├── README.md
├── install.py              # Auto-installer with venv
├── kaswallet.sh            # CLI wrapper script
├── requirements.txt
└── scripts/
    └── kaswallet.py        # Main wallet logic

Configuration

# Environment variables (one required)
export KASPA_PRIVATE_KEY="64-character-hex-string"
# OR
export KASPA_MNEMONIC="your twelve or twenty four word seed phrase"

# Optional
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)

Core Functions

Check Balance

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

Output:

{"address": "kaspa:q...", "balance": "1.5", "sompi": "150000000", "network": "mainnet"}

Send KAS

./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):

{"status": "sent", "txid": "abc123...", "from": "kaspa:q...", "to": "kaspa:q...", "amount": "0.5", "fee": "0.0002"}

Output (error):

{"error": "Storage mass exceeds maximum", "errorCode": "STORAGE_MASS_EXCEEDED", "hint": "...", "action": "consolidate_utxos"}

Network Info

./kaswallet.sh info

Output:

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

Fee Estimates

./kaswallet.sh fees

Output:

{"network": "mainnet", "low": {"feerate": 1.0, "estimatedSeconds": 60}, "economic": {...}, "priority": {...}}

Generate New Wallet

./kaswallet.sh generate-mnemonic

Output:

{"mnemonic": "word1 word2 word3 ... word24"}

Payment URI

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

Error Handling

Error	Cause	Solution
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

Payment Flow

┌─────────────┐     ┌─────────────┐     ┌─────────────┐
│   Sender    │     │ Kaspa Wallet│     │  Recipient  │
└──────┬──────┘     └──────┬──────┘     └──────┬──────┘
       │                   │                   │
       │  1. Initiate      │                   │
       │──────────────────▶│                   │
       │                   │                   │
       │                   │  2. Execute       │
       │                   │  KAS Transfer     │
       │                   │─────────────────▶│
       │                   │                   │
       │                   │  3. Confirm       │
       │                   │◀──────────────────│
       │  4. Success       │                   │
       │◀──────────────────│                   │
       │                   │                   │

Common Workflows

Consolidate UTXOs (Fix Storage Mass Error)

When sending fails with STORAGE_MASS_EXCEEDED:

# 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

# 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: Never expose in logs or error messages
• Mnemonics: Passed via environment variables only
• No disk storage: Wallet does not store credentials
• Fresh connections: Each command establishes new RPC connection
• Address format: Validate Kaspa addresses (kaspa:q... format)

Comparison with Traditional Wallets

Feature	Traditional Wallet	Kaspa Wallet CLI
Setup	GUI install	python3 install.py
Interface	Desktop app	CLI + JSON output
Automation	Limited	Full (JSON parsing)
Custody	Varies	Self-custody
Agent-friendly	No	Yes

Roadmap

• QR code generation for addresses
• Payment links
• Transaction history
• Multi-address support
• Batch payments
• Telegram bot integration

Resources

• Kaspa Docs
• Kaspa Explorer
• kaspa-py SDK