Frequently Asked Questions
General
What is Bolt21?
Bolt21 is a self-custodial Bitcoin Lightning wallet with BOLT12 support. It’s designed for simplicity and security, perfect for receiving mining payouts or everyday Lightning payments.
Is Bolt21 free?
Yes! Bolt21 is completely free to download and use. You only pay standard Lightning Network fees for transactions.
Is my Bitcoin safe?
Your Bitcoin is as safe as your recovery phrase. Bolt21 is self-custodial, meaning only you control your funds. We never have access to your Bitcoin.
Wallet Security
What is a recovery phrase?
Your 12-word recovery phrase is the master key to your wallet. Anyone with these words can access your funds. Store them safely offline - never share them with anyone.
What if I lose my phone?
No problem! Download Bolt21 on a new device and restore using your 12-word recovery phrase. Your funds will be fully recovered.
Can I use Face ID / Touch ID?
Yes! Bolt21 supports biometric authentication for quick and secure access to your wallet.
Payments
How do I receive Bitcoin?
Tap Receive and share your BOLT12 offer or on-chain address. For recurring payments like mining payouts, use your BOLT12 offer.
How do I send Bitcoin?
Tap Send, paste a Lightning invoice or BOLT12 offer, enter the amount (if needed), and confirm the payment.
What’s the minimum payment amount?
Lightning payments can be as small as 1 satoshi (0.00000001 BTC). Practical minimums depend on network fees.
Ocean Mining
How do I receive Ocean payouts?
- Copy your BOLT12 offer from Bolt21
- Paste it in your Ocean pool dashboard as the payout address
- Payouts arrive automatically - daily or as you earn
What’s the minimum payout?
Ocean can pay out as little as 2,000 sats via Lightning - much lower than on-chain minimums.
Why use Lightning for mining payouts?
- No on-chain fees eating your profits
- Near-near-instant settlement
- Daily payouts possible
- Works great for small miners