# What is Blink?

The everyday Bitcoin wallet born in El Zonte

[Blink](https://blink.sv/) (formerly Bitcoin Beach Wallet) is a Bitcoin wallet designed to enable bottom-up bitcoin adoption around the world. Whether you're a beginner or an expert, a shopper or a merchant, Blink's feature set makes it a must-have wallet on any phone. Blink's services, features, and account modes are not available in all countries. See: [Which countries are unable to download and activate Blink?](/creating-a-blink-account/which-countries-are-unable-to-download-and-activate-blink)

* **Your keys, your choice**: Blink offers two modes of operation. In Custodial Mode, Blink holds funds on your behalf and can help with account recovery. In Non-Custodial Mode (powered by the Spark protocol), you hold your own keys and Blink cannot access, freeze, or recover your funds. Availability of each mode varies by country — in some countries only Non-Custodial Mode is available.
* **Great for onboarding**: Blink is great for onboarding with easy setup and educational lessons, making it the perfect wallet to recommend to friends, family, or anyone new to Bitcoin.
* **Many ways to receive sats**: Blink offers many ways to receive sats, including Lightning Address, a Point of Sale ( PoS or Cash Register) web app, LN invoice, printable Paycode or on-chain address, making it a great tool for small businesses, fundraising, and remittances.
* **Dollar Balance:** Hold a stable USD-denominated balance alongside your bitcoin. In Custodial Mode the Dollar Balance is powered by Stablesats (learn more at [stablesats.com](https://stablesats.com)); in Non-Custodial Mode it holds the USDB stablecoin issued by Brale on the Spark protocol. The Dollar Balance and transfers between balances are not available in all countries or modes.
* **Designed to just work**: Blink stays current with the latest developments in Bitcoin and the Lightning Network, so it just works when you reach for it. With a dedicated team managing Lightning liquidity and channels, it’s a wallet you can rely on for fast and reliable payments.
* **Open source:** True to the Bitcoin ethos, Blink is free open source software (FOSS) built on the Lightning development platform maintained by Blink. View the code on [GitHub](https://github.com/blinkbitcoin)
* **Multi-language**: Use Blink in your native language, regardless of where you live. Today, the wallet is translated to English, Spanish, French, Portuguese, Czech, German, Thai, Catalan, Swahili and many more. Don’t see your language? Reach out to us at <support@blink.sv> to request a new language.
* **Choose your display currency**: Set which currency you want to see your sats and Dollar balance in. More than 30 currencies available, with more coming soon.
* **Additional useful features:**

  \- No transaction fee when both sender and receiver use Blink

  \- Earn sats and learn about Bitcoin with the in-app quiz

  \- Transaction log displays a history of payments

  \- Contact list makes it easy to send payments to friends and family

  \- Merchant map displays businesses in your area that accept Bitcoin / Lightning payments

  \- For developers and automation needs there is a public API available. Learn more at [dev.blink.sv](https://dev.blink.sv)


# Creating a Blink Account

Welcome to the section of our FAQ dedicated to creating an account with Blink. Here, you will find answers to all your questions related to signing up for a new account, setting up security measures, and navigating our user-friendly interface. Whether you are new to Bitcoin or a seasoned veteran, we are here to guide you through the process of creating an account with Blink Wallet.


# Where can I download and Install Blink?

Blink is currently available for download and installation on the app stores of all major mobile operating systems and phone manufacturers, including [Android ](https://play.google.com/store/apps/details?id=com.galoyapp)(version 8 or higher), [Huawei](https://appgallery.huawei.com/#/app/C105387593), and [iPhone.](https://apps.apple.com/ng/app/bitcoin-beach-wallet/id1531383905) The easiest way to find Blink in app stores is via the download buttons on [blink.sv](https://blink.sv).

If you are unable to find the app on these stores, it may be due to one of the following reasons:

* Your app store may be registered in a country that does not allow the download or installation or use of this type of wallet due to internal regulations. Examples of such countries include the China and North Korea, find the full list in this answer: [Which countries are unable to download and activate Blink?](https://faq.blink.sv/creating-a-blink-account/which-countries-are-unable-to-download-and-activate-blink)
* On some Huawei phones, you may need to install Google Play Services and Google Play Store before you can download the app.

Users of GrapheneOS, CalyxOS, LineageOS and other Android devices can [download and install Blink directly via an APK](https://github.com/blinkbitcoin/blink-mobile/releases).

Please note that the availability of the app may vary depending on your location and device, so it's always a good idea to check the app store first.


# How to install the APK from GitHub

As the Blink wallet is Free Open Source Software the app is published and can be installed from the releases on GitHub. Installing third party apps is only allowed on Android, not on iOS. Follow these steps to install the app from GitHub:

1. Open the link [github.com/blinkbitcoin/blink-mobile/releases/latest](https://github.com/blinkbitcoin/blink-mobile/releases/latest) on your Android phone to download the latest release of the Blink app
2. Scroll down on the page to `Assets` and choose the `app-universal-release.apk` for the best compatibility.\
   The `app-arm64-v8a-release.apk` is smaller but might not work on old devices.

   ![](/files/VjB7DVbwFAa8c3Xk3FP1)
3. Confirm with `Download anyway` and wait for the download to finish

   ![](/files/sXBpcT7x0NFnYDKsWpIA) ![](/files/V0OFHDVv9NYUntjT17s1) ![](/files/4WF44O0Z7bibz5hP7S0I)
4. If you have not set up your browser to install apps from unknown sources yet you will be asked to do so now. Choose `SETTINGS` and enable `Allow from this source`

   ![](/files/LTvfuGFHy1pffXaNtxIe) ![](/files/h1VBAfQqvXx7kSjpCcUX)
5. Carry on with the installation by choosing `INSTALL`

   ![](/files/jDoakw5zmC7XGeX2MNPY) ![](/files/7qleNlT7v5MbTXTwXvcS)
6. Finally `OPEN` the app when installed

   ![](/files/ScIa7rMQMK3tCreSeAY6)
7. Similar to all other apps you will find the Blink app in your app drawer or launcher too.


# Which countries are unable to download and activate Blink?

Blink can be downloaded in most countries, but the services, features, and modes available to you depend on your status and country of residence and on applicable regulation. Blink applies restrictions in the app, and users must not attempt to circumvent them (see the Terms and Conditions).

However, due to sanctions or regulatory restrictions, Blink is restricting access in a number of countries:

**Jurisdictions where Blink cannot offer any services:**

* Belarus
* China
* Cuba
* Iran
* North Korea
* Russia
* Syria
* Sanctioned regions, including Crimea

Blink does not offer services in these jurisdictions due to sanctions or regulatory restrictions.

**Residence-based availability:** The services, features, and modes available to you depend on your status and country of residence. If you reside in the United States or are a US Person (including residents of Puerto Rico and other US territories), only Non-Custodial Mode is available; Custodial Mode and API access are not available. Feature-level restrictions (for example, availability of the Dollar Balance) apply in a number of countries and are enforced in the app; the Blink App shows which modes and features are available to you. See the Terms and Conditions for details.

**Jurisdictions where custodial services are winding down:** In some jurisdictions where Blink is not licensed, new custodial accounts can no longer be created, and existing custodial users have received (or will receive) an in-app notice with instructions and deadlines for moving to Non-Custodial Mode or withdrawing funds to an external wallet. If you received such a notice, the dates and instructions in your notice apply. For the full explanation, options, and timeline, see: Important Changes to Custodial Accounts in Your Region. Non-Custodial Mode generally remains available in these jurisdictions.


# How do I create an account with Blink?

Creating an Blink account is a simple process that involves the following steps:

1. Download the Blink application from your phone's app store or [use the apk on Android](/creating-a-blink-account/how-to-install-the-apk-from-github)
2. Select \`Settings in the upper right corner of the Home Screen
3. Select the flag based on the area code of your phone number
4. Enter your phone number and swipe right to complete the puzzle
5. Enter the code received by SMS

After registering, you can choose between Custodial Mode (Blink holds funds on your behalf) and Non-Custodial Mode (you hold your own keys via the Spark protocol). The availability of each mode depends on your status and country of residence.

## Add an email address (optional)

Adding and email address makes you able to use it to login so you don't need to rely on the phone number. Steps to add and email address:

1. select the menu on the top right and tap `Account`
2. select `Email (for login)`
3. enter an email address and complete the verification to enable login with email

## Set your username (optional)

The username is your internal blink identifier and also serves as your [lightning address](/blink-payment-methods) 6. Select `Settings` 7. Select `Your Blink address` and click in `Set your Blink Address` 8. Choose a username for your account. Your username should not have any special characters or spaces. If your desired username is not available, you can add numbers or more letters to check for availability. 9. Click on `Set Your Blink Address` to finalize the creation of your account


# How can I recover my account if I lost my phone number?

## Custodial Mode accounts

Currently, we are unable to recover accounts solely through lost phone numbers due to security reasons. This is why it's crucial to associate an email address with your Blink account during the initial setup. By adding an email address to your account, you ensure that you can still access your Blink account even if you lose your phone number.

To add or update your email address, follow these steps:

1. Open the Blink app and navigate to Settings.
2. Go to the Account section.
3. Select "Email" and enter your preferred email address.
4. Verify your email address through the confirmation link sent to your email inbox.

Once your email address is linked to your Blink account, you can use it to sign in and manage your account securely. If you encounter any issues or need further assistance, please reach out to Blink support for help.

## Non-Custodial Mode accounts

If you are using Non-Custodial Mode, Blink cannot recover your funds — you hold your own private keys. Make sure to back up your keys securely. If you lose both your phone number and your keys, your funds cannot be recovered by Blink or anyone else.

You can still regain access to your Non-Custodial Mode account using your email address (if one was added) or by restoring from your key backup.


# Where can I find my Lightning address?

You can find your Lightning address within the Blink app. Here's how:

1. Open the Blink app on your mobile device.
2. Navigate to the "Settings" section.
3. Select "Your Blink Address."
4. Your username, which also serves as your internal Blink identifier and Lightning address, will be displayed on the screen.

Additionally, you can access your Lightning address by following these steps:

1. Open the Blink app on your mobile device.
2. Navigate to the "Receive" section.
3. Select the Lightning Network tab.
4. Your Lightning address will be displayed on the screen. It typically starts with "ln" followed by a string of characters.


# What information do I need to provide to register to Blink?

You only need a smartphone and internet access. Download the app and open it — no personal information is required to get started.

We recommend adding a phone number and email address to your account, which enables login recovery and unlocks additional features such as setting a username. Adding a phone number also allows you to increase your transaction limits if you choose Custodial Mode.

Once you've entered your phone number, you'll receive an SMS or WhatsApp text message for account authentication. After that, you can create an optional unique username for Lightning Address and internal Blink transactions.

Blink offers two modes of operation — Custodial Mode and Non-Custodial Mode — and the availability of each depends on your status and country of residence. See the Terms and Conditions for details.

Please note that the username you create will be visible to other Blink users, so we recommend choosing your username with this in mind.

Once registered it is recommended to [add an email address](/creating-a-blink-account/how-do-i-create-an-account-with-blink#add-an-email-address-optional) which you can use to log in going forward.


# What should I do if I don't receive an SMS?

If you don't receive the SMS text to complete your Blink registration, make sure your phone has international SMS text messaging permissions or is connected to the internet to receive the confirmation code via WhatsApp.

Check the following steps:

* **Check Signal and Coverage:** Ensure you have strong signal and network coverage.
* **Restart Connection:** Try restarting your connection by toggling Airplane mode on and off.
* **Login with email instead:** If you have already associated an email with your account, you can use it to log in instead of SMS verification.
* **Check Phone Number:** Double-check if you entered your phone number correctly. If there's a typo, correct it and try again.
* **Wait for Retry:** Blink allows up to 4 attempts per 3 days for SMS delivery. If you have already exceeded this limit, you will need to wait until the cooldown period expires before trying again.


# How do I contact Blink Support team?

If you need to contact Blink's support team, you can reach out to them through the following channels:

* Email: <support@blink.sv>

You can also check the [Blink status page](https://blink.statuspage.io/) to see if there any ongoing incidents our team is working on.


# Is it possible to change the phone number associated with a username after creating a Blink account?

Yes, it is possible to change the phone number associated with your username after creating a Blink account. Follow these steps to update your phone number:

1. Go to the "Settings" section in your Blink app.
2. Navigate to the "Account" settings
3. Ensure that you have associated an email address with your account for account recovery purposes.
4. Delete the current phone number associated with your account.
5. Add the new phone number that you wish to associate with your Blink account.

By following these steps, you can update your phone number within the Blink app. This allows you to maintain accurate and up-to-date contact information associated with your account.


# Can I change my username after creating my Blink account?

Unfortunately, it is currently not possible to change your username once it has been created. Your username is permanently linked to your wallet and phone number.


# Why can't I complete the puzzle to receive SMS?

If you are having difficulty completing the puzzle to receive an SMS, it could be due to issues with your phone's touchscreen, puzzle does not display correctly or because too many unsuccessful attempts have been made. In such cases, Blink may temporarily block further attempts for security reasons.

We suggest uninstalling and reinstalling the app but if the same problem persists please contact us at <support@blink.sv> for assistance.


# Do I need to complete KYC to create a Blink account?

All you need is a phone number with international SMS text messaging permissions and an internet connection.

After entering your phone number and receiving the account authentication SMS or Whatsapp message, you can create a unique username for internal Blink transactions and unlock other features in the wallet.


# How can I delete my Blink account?

## Deleting your account (permanent)

To permanently delete your Blink account:

1. **Withdraw your funds** — Send any remaining balance to another Bitcoin wallet. Once the account is deleted, funds cannot be recovered.
2. Open the **☰ menu** (top left) → **Settings** → **Account** → **Danger Zone**.
3. Follow the prompts to confirm deletion.

{% hint style="danger" %}
**This action is irreversible.** Your username will be permanently retired and cannot be reused by anyone — including you. Your phone number will become available for a new account after a short waiting period.
{% endhint %}

## Removing an account from your device (not deletion)

If you use Blink's **Switch Accounts** feature, you may see an **✕** button next to each account. Tapping **✕** only removes the account from your device — it does **not** delete the account.

To add the account back to your device, go to **Switch Accounts** → tap **+** → log in with your phone number or email.

{% hint style="info" %}
If you only want to sign out or remove Blink from one device while keeping your account active, use Switch Accounts or simply uninstall the app. Your account and funds will remain safe.
{% endhint %}


# Using Blink

Whether you're new to Bitcoin or an experienced user, we hope this section will provide you with the information you need to make the most out of our wallet. If you have any additional questions or concerns, please don't hesitate to contact our support team through:


# What will I find on the main screen of my Blink account?

1. **Balance Display:** Your current balance, shown in both Bitcoin Balance and Dollar Balance (where available).
2. **Action Buttons:** Convenient buttons for various actions, allowing you to transfer between balances, receive Bitcoin, send payments, or scan QR codes.
3. **Transaction History:** A list of your recent transactions, providing a record of your incoming and outgoing payments.


# Why do I see a balance of 0 when I log in to my account?

If you are seeing a balance of 0 when you log in to your account, it could be due to using an incorrect phone number associated with your account and you actually just created a new account. Please ensure that you are logging in with the correct phone number that is linked to your account.

Here’s what you can do:

1. **Verify Phone Number:** Double-check if you are using the correct phone number associated with your Blink account.
2. **Try Alternate Methods:** If you have associated an email with your account, you can try logging in using your email instead of your phone number.


# How do I receive a transaction with Blink?

Blink was created to facilitate sending and receiving Bitcoin transactions using on-chain, LNURL & Lightning.

You can provide the following information to receive a transaction:

* Your on-chain address (starts with `bc1...`). Incoming on-chain transactions (deposit) require 2 confirmations to become available for spending.
* Creating a Lightning invoice (BOLT11 format, starting with `lnbc1...`)
* Point of Sale (PoS or Cash Register) web app
* Use the Lightning Address, which uses an email address form (eg. <yourusername@blink.sv>)
* Using your Blink Paycode (also known as an LNURL)

You can also receive payments to your Blink username from other Blink users. Please note, that this feature is only available for Blink to Blink payments and will NOT work with other apps like Chivo or Strike.


# How do I send a transaction with Blink?

Blink provides an easy way to send Bitcoin transactions using both on-chain and Lightning networks. To send a transaction, you can do the following:

* Enter the recipient's on-chain address (starting with `bc1...`) or a Lightning invoice (starting with `lnbc1...`).
* Alternatively, you can use the recipient's Lightning Address which looks like an email address (e.g. `username@blink.sv`) or the username of another Blink user to make the payment.
* Choose if you want to spend from your Bitcoin or Stablesats (USD) account.
* Finally, confirm the transaction details and send the payment.


# Which methods can I use to send and receive transactions using Blink

| Type of payment       | Sending | Receiving |
| --------------------- | ------- | --------- |
| Lightning             | Yes     | Yes       |
| On-Chain              | Yes     | Yes       |
| Lightning Address     | Yes     | Yes       |
| Contact List\*        | Yes\*   | Yes\*     |
| Point of Sale Web App | No      | Yes       |
| LNURL Paycode         | No      | Yes       |

\*With the contact list you can send and receive to other Blink users only. Will need to do at least one transaction with this user to add to “contact List”.


# How can I add balance to my Blink account?

There are several ways to add funds to your Blink account:

1. Earn or receive bitcoin: sell some goods or get paid in bitcoin to your Blink wallet.
2. Send bitcoin from an exchange or other wallet using the Lightning Network.
3. Send bitcoin from an exchange or other wallet on-chain to the provided Bitcoin wallet address.
4. Acquire bitcoin through a third-party service — for example peer-to-peer platforms or Bitcoin ATMs (see [Coin ATM Radar](https://coinatmradar.com/)) — and send it to your Blink wallet. Fees and availability are set by those providers.

Please note that fees may apply depending on the method you choose to add funds to your Blink account.

Note: in jurisdictions where custodial services are winding down, receiving funds to a custodial account is disabled from the cutoff date stated in your in-app notice. For the full explanation, options, and timeline, see the announcement: Important Changes to Custodial Accounts in Your Region — the dates in your personal in-app notice take precedence. Receiving in Non-Custodial Mode is unaffected.


# What are Blink's account limits?

Transaction limits apply to Custodial Mode accounts and depend on your account level, your status and country of residence, and applicable regulation. Your current limits are displayed in the Blink App within your custodial account, if you have one. In Non-Custodial Mode you hold your own funds and these limits do not apply.


# Upgrading to a level 2 account

Upgrading your account to level 2 will come with benefits:

* increased transaction limits
* access to [transfer to bank accounts in selected countries](https://faq.blink.sv/using-blink/how-do-i-cash-out-my-blink-funds)
* possible recovery through the support if you lose access to your account

To complete the process will need to provide additional data to be verified: your name, a government issued ID and a selfie.

Follow these steps to upgrade your account:

1. Go to the "Settings" section in your Blink app.
2. Navigate to the "Account" settings
3. Select the "Upgrade your account" option
4. Follow the instructions guiding you through the upgrade process

With any questions or concerns regarding the account upgrade process, you can contact us through email at <support@blink.sv>.

We are always ready to assist you and answer any questions you may have.


# Upgrading a legacy Trial account

Trial accounts are no longer offered. If you have an existing Trial account, you can upgrade it to a level 1 account to keep using it.

A Trial account has low transaction limits and cannot send or receive on-chain. Upgrading to level 1 comes with benefits:

* Increased transaction limits (your current limits are shown in the Blink App)
* Ability to recover the account using your registered phone number (SMS / WhatsApp) or email
* Functions like on-chain send and receive, setting a username, a Lightning address, the Point of Sale (PoS or Cash Register) webpage, and a static Paycode

To upgrade your Trial account (level 0) to level 1, verify a phone number:

1. In the Blink Wallet, open the menu at the top right and tap `Account`
2. Select `Backup/upgrade account`
3. Complete the account setup with a phone number

We recommend adding an email address as well, so you can also recover your account with email:

1. Open the menu at the top right and tap `Account`
2. Select `Email (for login)`
3. Enter an email address and complete the verification to enable login with email

Note: Trial, level 1, and level 2 accounts are Custodial Mode accounts, and their availability depends on your status and country of residence. You can also move to a Non-Custodial Mode account, where you hold your own keys — a guided step-by-step migration is being rolled out in the app, or you can create a non-custodial account yourself and transfer your funds. If you received an in-app notice that custodial services are ending in your jurisdiction, you can still upgrade your existing Trial account — upgrading helps you recover, move, or withdraw your funds — but the dates and instructions in your notice apply. For the full explanation, options, and timeline, see: Important Changes to Custodial Accounts in Your Region.


# How do I withdraw my Blink funds?

To withdraw your Blink funds, you can use the following methods:

You can also withdraw your bitcoin to a third-party service and receive local currency there — for example peer-to-peer platforms, Bitcoin ATMs (see [Coin ATM Radar](https://coinatmradar.com/)), or third-party trading platforms that support Lightning or on-chain withdrawals. Fees and availability are set by those providers.

Please note that fees may apply dependent on the exchange method you use and the availability of these methods may vary. It's always recommended to research and compare the fees and rates of different providers before choosing a method to cash out your funds.

If you received an in-app notice that custodial services are ending in your jurisdiction, please follow the instructions and deadlines in that notice. You can move your balance to Non-Custodial Mode in the app where available, or withdraw to an external wallet at any time before your deadline. For the full explanation, options, and timeline, see: Important Changes to Custodial Accounts in Your Region — the dates in your personal in-app notice take precedence.


# How does the Blink wallet work?

The Blink wallet offers a user-friendly platform to manage your Bitcoin funds and perform various types of transactions. Here's a breakdown of what you can do with the wallet:

Blink operates in two modes: Custodial Mode (your funds are held in custody by your Blink contracting entity) and Non-Custodial Mode (you hold your own keys via the Spark protocol; Blink cannot access, freeze, or recover your funds). Some features below are available only in one mode or only in certain jurisdictions — see the Terms and Conditions.

1. **Store and Use Bitcoin:** You can securely store your Bitcoin in your Blink wallet and use it to make purchases online or offline. Simply scan the recipient's QR code or enter their Bitcoin address to send payments.
2. **Receive Bitcoin:** Share your wallet address with others to receive Bitcoin. When someone sends you Bitcoin, it will appear in your wallet's balance, ready to be used or saved.
3. **On-Chain Transactions**: Blink supports traditional on-chain Bitcoin transactions. If you choose to send Bitcoin using the on-chain network, you need to enter the recipient's Bitcoin address and the amount you want to send. These transactions are recorded directly on the Bitcoin blockchain.
4. **Lightning Network Transactions:** Blink also supports Lightning Network transactions, a layer built on top of the Bitcoin network. Lightning Network offers faster and cheaper transactions. To send a Lightning Network payment, you can use the recipient's Lightning Network invoice, which specifies the amount and recipient's Lightning Network node. Lightning transactions are ideal for quick, low-cost transactions.
5. **Dollar Balance:** Hold a stable USD-denominated balance. In Custodial Mode, the Dollar Balance is powered by Stablesats; in Non-Custodial Mode, it holds the USDB stablecoin (issued by Brale) on the Spark protocol. The Dollar Balance is not available in all jurisdictions. See the Terms and Conditions for details and risks.
6. **Transfer:** Where available, transfer between your Bitcoin Balance and Dollar Balance at the rate displayed in the app. Transfers between balances are not available in all jurisdictions.
7. **Merchant Features**: Blink provides convenient merchant features such as the Point of Sale (PoS or Cash Register) and Pay Code. The Point of Sale enables businesses to accept Bitcoin payments, whether on-chain or through Lightning, providing a seamless point-of-sale experience. The Pay Code feature allows businesses, fundraisers, and individuals to display a QR code that customers can scan and pay in seconds.
8. **Map Feature:** Explore the map feature in Blink to discover businesses near you that accept Bitcoin. You can easily locate these merchants and make payments directly to them by clicking "Pay to this business" on their pin location.
9. **Earn Feature:** Blink's Earn section offers a fun way to earn sats (small units of Bitcoin) by learning about Bitcoin basics. Answer questions correctly to earn sats, which will automatically appear in your wallet.

With Blink, you have a comprehensive suite of features at your fingertips, making it easy to manage your Bitcoin, transact with merchants, explore nearby businesses, and even earn sats while expanding your Bitcoin knowledge.


# Can I pay with a credit or debit card?

No, Blink is a Bitcoin wallet that allows you to send and receive Bitcoin (BTC) payments with Lightning and onchain. You can use Blink to pay for goods and services at any business that accepts Bitcoin.


# What options there are if the Blink app is not compatible with my phone?

Phones running an Android version lower than 8.0 are no longer compatible with the Blink app.

There are alternatives to connect to Blink:

See [how to connect your Blink account to the Alby Browser extension on Android](/integrations/connect-to-the-alby-browser-extension-on-android).

You can also take similar steps to connect to Alby using a desktop browser like Chrome or Firefox.


# How to obtain a Proof of Payment from Blink?

As discussed in the answer to the question [How to prove that a lightning invoice was paid? ](/blink-and-other-wallets/how-to-prove-that-a-lightning-invoice-was-paid)the information needed to prove a payment of a Lightning invoice is:

1. The original **Lightning Invoice** provided by the payee node
2. The **payment pre-image** received by the payer on the successful payment

This information is exposed in the Blink Transaction History when clicking \`All transactions\` then choose the sent payment in question.

Copy the `Preimage / Proof of Payment` and the `Payment Request` fields which together can serve as a Proof of Payment to anyone who is able to verify cryptographically.

Currently the Preimage is only shared for Lightning network payments, but soon it will be displayed for payments made to other Blink users as well.

In case of an on-chain transaction the payment is publicly broadcasted to the bitcoin network and confirmed by miners in the blockchain. Knowing the Transaction ID (txid) makes everyone able to verify that the the transaction has taken place (the amount has been paid to the bitcoin address) in a public block explorer like [mempool.space](https://mempool.space). To prove an onchain transaction share the destination address and the txid and be aware that these (unlike the lightning invoice and preimage) are visible to anyone reading the bitcoin blockchain.


# How to transfer between your Bitcoin Balance and Dollar Balance?

Where available, you can move funds between your Bitcoin Balance and Dollar Balance directly in the Blink App:

1. Open the Blink App
2. Tap **Transfer**
3. Choose the direction (Bitcoin Balance → Dollar Balance, or Dollar Balance → Bitcoin Balance) and enter the amount
4. Review the details shown in the app and confirm

Learn more about the Dollar Balance at [blink.sv/en/dollar-balance](https://www.blink.sv/en/dollar-balance)


# When do lightning invoices expire?

The BOLT11 invoices generated by Blink expire after\
\* 2 hours using the Bitcoin account\
\* 5 minutes for the USD account.\
\
If an invoice has expired it cannot be paid.\
\
Other means to pay a Blink user are:\
\- Lightning Address: `username@blink.sv`\
\- static Paycode (also known as LNURLpay code) at `https://blink.sv/username`\
\- Point of Sale at `https://pay.blink.sv/username`\
\- an onchain bitcoin address for higher amounts


# Problems with SMS Login

If you are having trouble logging into your Blink Wallet via SMS OTP, consider changing your login method to email.

To switch from phone number login to email, please follow these steps:

1. Open Settings.
2. Go to Login Methods.
3. Choose Email as your preferred login method.
4. Enter your email address.
5. Check your email for a One-Time Password (OTP) and enter it to verify your email address.
6. In the same section, remove your phone number if you no longer wish to use it.


# Blink Payment Methods

Welcome to the payment methods section of our FAQ, where we will provide you with a comprehensive overview of the payment methods supported by Blink. Here are the payment methods available on Blink:

1. **On-Chain Transactions:** Blink supports traditional on-chain Bitcoin transactions. This method involves recording transactions directly on the Bitcoin blockchain. You can send and receive Bitcoin by entering the recipient's Bitcoin address and the desired amount.
2. **Lightning Network Payments:** Blink enables Lightning Network payments, which offer faster and more cost-effective transactions. The Lightning Network is a layer built on top of the Bitcoin network that allows for near-instantaneous payments with reduced fees. You can send and receive Lightning payments by using Lightning Network invoices.
3. **LNURL:** Blink also supports LNURL, which stands for Lightning Network URL. LNURL simplifies the process of sending and receiving Lightning payments by generating unique payment links. Users can simply click on the LNURL link to initiate the payment process, making it convenient and user-friendly.
4. **Intraledger Transactions:** With Blink, you can also perform intraledger transactions, which allow you to send and receive payments within the Blink ecosystem. This feature ensures seamless and instant transfers between Blink users, enhancing the overall payment experience.

Whether you prefer on-chain transactions, Lightning Network payments, LNURL, or intraledger transactions, Blink offers a versatile platform to meet your Bitcoin payment needs. Explore the various payment methods supported by Blink and enjoy a secure and convenient way to send and receive Bitcoin payments.


# Intraledger


# What is an intraledger transaction?

An intraledger transaction refers to a transaction that occurs within the Blink ecosystem. It allows users to send and receive payments directly to other Blink users without the need to involve external wallets or networks. Intraledger transactions are fast, seamless, and cost-effective, making them an ideal choice for peer-to-peer transactions within the Blink community. Whether you want to send money to a friend, make a purchase from a local merchant, or settle a debt, intraledger transactions provide a convenient and efficient way to transfer funds within the Blink network.


# Are there any fees for transaction between blink users?

No, there are no fees for transactions between Blink users. When you send or receive Bitcoin within the Blink ecosystem, whether it's through on-chain transactions, Lightning Network payments, or LNURL transactions, there are no additional fees imposed by Blink. You can freely send and receive funds between Blink wallets without incurring any charges. This makes Blink an attractive option for users who want to transfer Bitcoin without worrying about transaction fees, enabling seamless and cost-effective peer-to-peer transactions within the Blink community.


# What information is needed to send or receive Bitcoin between Blink wallets?

To send Bitcoin to another Blink user, you only need to know their Blink username. Simply enter their Blink username as the recipient, and the funds will be sent directly to their wallet. It's a convenient and hassle-free way to make payments within the Blink ecosystem.

To receive Bitcoin from another Blink user, you need to provide them with your Blink username. Share your Blink username with the sender, and they can easily send funds to your wallet using your username. Once a transaction is completed with a Blink user, their username will be automatically saved in your contacts list, making future transactions even easier.

With Blink's user-friendly interface, sending and receiving Bitcoin between Blink wallets is seamless and straightforward. No complicated wallet addresses or QR codes are required, simplifying the process and enhancing the user experience.


# On-chain


# What is an on-chain transaction?

An on-chain transaction is a Bitcoin transaction that is processed and recorded on the blockchain, which is a decentralized, immutable ledger. Because it is recorded on the blockchain, an on-chain transaction cannot be altered or reversed by anyone once it has been confirmed.

The confirmation time for on-chain transactions can vary, but on average it takes around 10 minutes. However, during periods of high network activity, it can take longer for a transaction to be confirmed.


# How can I receive an on-chain transaction with Blink?

To receive an on-chain transaction using Blink, follow these steps:

1. Open the Blink app and click on `Receive`
2. Under the QR code click on `Onchain`
3. You can copy the address, share it, or show the QR code to the sender. Note that to avoid address reuse there will be a new address displayed when you have received a transaction on the address shared previously. The old address will remain valid to receive transactions on your account even when there is a new address shown.
4. Once the transaction has been sent, the transaction should shortly appear as `Pending` in your wallet. Click on the transaction to see it's \`Transaction Hash\`. Using the Transaction Hash (also known as TXID) you can see the details of the transaction in a block explorer like [mempool.space](https://mempool.space) and see when it is confirmed in a block.


# How can I send an on-chain transaction with Blink?

To send an on-chain transaction with Blink, please follow these steps:

1. Open the Blink app and click on the `Send` button.
2. Enter the recipient's Bitcoin on-chain address or scan their QR code.
3. Choose if you want to spend from your Bitcoin Balance or Dollar Balance.
4. Input the amount you want to send and an optional note for yourself.
5. Tap `Next` and double check the details.
6. Move the slider to the right to complete the transaction.
7. Once the transaction is confirmed, you can share the transaction ID (also known as the `hash` or `txid`) with the recipient as a proof of the successful transaction.

If the mining fees calculated are more than the 10% of the amount you are preparing to send Blink will show a notification: `High fee! We recommend Lightning.`

Note that on-chain transactions may take some time to confirm on the Bitcoin network, depending on the current network traffic and the transaction fees chosen.


# Where can I verify the status of an on-chain transaction?

You can verify the status of an on-chain transaction by using a blockchain explorer like [mempool.com](https://mempool.com). A blockchain explorer is a tool that allows you to search and view all the transactions that have occurred on the Bitcoin blockchain.

To check the status of your transaction, you will need the transaction ID or hash. This information can usually be found in your wallet transaction history or on the transaction confirmation page.

Once you have the transaction ID or hash, you can enter it into a blockchain explorer search bar, and it will show you the details of the transaction, including the number of confirmations and the current status.


# What are the different types of Bitcoin on-chain addresses?

Bitcoin on-chain addresses come in different formats, each with its own prefix. Here are the most common formats and their respective prefixes:

* Legacy addresses: start with "1"
* SegWit addresses: start with "3"
* Native SegWit addresses: start with "bc1" (Most common bitcoin on-chain address)

It's important to note that while different address formats may look different, they are all valid Bitcoin addresses and can be used to send and receive Bitcoin. However, some wallets and services may only support certain address formats, so it's important to verify which formats are supported before sending or receiving Bitcoin.


# Can capitalization affect the validity of a Bitcoin address?

Yes, capitalization can affect the validity of a Bitcoin address depending on address type at hand.

For legacy Bitcoin addresses (starting with a 1 or 3), capitalization is significant and must be entered correctly to ensure the transaction is processed correctly.

For the most common bitcoin on-chain addresses (starting with bc1), capitalization is not significant and can be entered in upper or lower case letters interchangeably. Nevertheless, it is always recommended to double-check the address before sending any transactions to avoid mistakes.


# What are some common reasons for an on-chain transaction to take a long time to confirm?

There are several reasons why an on-chain transaction may take longer than usual to confirm. Some common reasons include:

1. **Network congestion:** If there are many pending transactions on the Bitcoin network, miners may prioritize transactions with higher fees, leaving transactions with lower fees to wait longer.
2. **Low transaction fee:** If you set a low transaction fee, miners may not prioritize your transaction, leading to a longer confirmation time.

If your transaction is taking longer than expected, you can use a block explorer like mempool.com to check its status. If you are still experiencing issues, please contact our support team for assistance at <support@blink.sv>


# Lightning

Welcome to the Lightning Network section of our Blink Wallet FAQ! Here you'll find answers to all your questions related to the lightning network payment methods available in our wallet. The Lightning Network is a powerful layer-two scaling solution built on top of the Bitcoin network. With lightning-fast transaction speeds, ultra-low fees, and increased privacy, it's no wonder why the Lightning Network is quickly becoming the go-to payment method for Bitcoin users around the world. Blink fully supports lightning transactions by default, making it easier than ever to send and receive Bitcoin payments instantly.


# What is the Lightning Network?

The Lightning Network is a second layer scaling solution built on top of the Bitcoin network, designed to enable faster and cheaper micropayments. By using the Lightning Network, Bitcoin users can benefit from a number of advantages, including:

1. **Low Fees**: The fees for processing transactions on the Lightning Network are extremely low, often just a fraction of a penny. This is in contrast to traditional payment networks, which can charge fees as high as 3-5% of the transaction amount.
2. I**nstant Settlement**: Transactions on the Lightning Network are final, just like cash. This eliminates the risk of chargebacks that merchants face when accepting credit card payments.
3. **Security**: The Lightning Network is built on top of the Bitcoin network, so it benefits from the same level of security as the underlying blockchain.
4. **Scalability**: The Lightning Network can handle a much higher volume of transactions than the Bitcoin blockchain alone, with the potential to process millions of transactions per second.

Overall, the Lightning Network represents a significant advancement in Bitcoin's ability to function as a practical and scalable payment network.


# Why does Blink use Lightning as default?

In addition to the inherent benefits of the Lightning Network, Blink chose to use Lightning by default because it aligns with our vision of making bitcoin accessible to all.

By using Lightning, we can provide users with faster, cheaper, and more efficient transactions, making it easier to use bitcoin for everyday transactions.

Furthermore, by using the Lightning Network, Blink can help reduce the overall load on the Bitcoin blockchain, thus contributing to the overall health and sustainability of the Bitcoin network


# How to recognize a Lightning invoice?

A Lightning invoice is a payment request that starts with "ln" and includes a long string of characters. It may also include the amount to be paid and a description of the payment.

When receiving a Lightning invoice, you can recognize it by the "ln" prefix, followed by a string of alphanumeric characters. The Lightning invoice may be displayed as a QR code that you can scan with your Bitcoin wallet app.

It's important to note that a Lightning invoice is not the same as a Bitcoin on-chain address, which typically starts with "1" or "3" for legacy addresses, or "bc1" for newer SegWit addresses.


# How do I send bitcoin payments using the Lightning Network with Blink?

To send bitcoin using the Lightning Network with the Blink, you have two options:

**Option 1:** If you are close to the receiver, you can click on the "Scan QR Code" button on the main screen of the app and scan the receiver's Lightning invoice.

**Option 2:** Click on the "Send" button on the main screen of the app and paste the Lightning invoice, the Blink username, or the LNURL of the receiver. If the invoice you received from the receiver already has an amount specified, you do not need to add an amount. However, if the amount is not specified, you can add the amount you wish to send in the designated field.


# How do I receive bitcoin payments using the Lightning Network with Blink?

To receive a bitcoin payment using the Blink through the Lightning Network, simply follow these steps:

1. Click on the "Receive" button on the main screen of the app.
2. Choose whether you want to receive the payment to your Bitcoin Balance or Dollar Balance
3. If you want to request a specific amount, enter the amount you wish to receive in the designated field.
4. Set a note or label to remember what you have spent your money on.
5. You can send a zero amount invoice, but it may not always work depending on the wallet the sender is using. For example, some wallets like Muun always require invoice with amount.


# What should I do if my Lightning transaction fails while trying to pay someone?

If your Lightning transaction fails while trying to pay someone, the most common reason could be insufficient funds to pay the invoice. Make sure you have sufficient funds in the account you want to send from and don't forget to account for network fees.

Another reason could be the failure to find a route to send the transaction to the destination Lightning node. In such cases, you can try again after a short period or ask the recipient of your payment to provide an invoice from another wallet.

If the issue persists, you may reach out to customer support for assistance in resolving the issue.


# What should I do if my Lightning transaction status is pending?

If your Lightning transaction is showing a pending status, the best course of action is to wait. In Lightning Network transactions, there are two possible outcomes for a pending transaction: success or cancellation.

* If the transaction is successful, the funds will be transferred as intended.
* If the transaction is cancelled for any reason (such as a timeout), the funds will be automatically refunded to your wallet.

The change of status could take up to two weeks.


# Lightning Address and Paycode

Lightning Address provides a human-readable address that look just like an email address and that you can send Lightning transactions to.

In this section of our FAQ, we will cover all questions related to Lightning Address and Paycode payments, including how to use them, their benefits, and any troubleshooting tips you may need.


# Can someone steal my money if I give them my Lightning Address?

No, this is not possible. Lightning Addresses can only receive funds. They can be shared publicly and doing so does not put your funds at risk — Lightning Addresses are receive-only.


# What is a Lightning Address, and what does it look like?

Lightning Addresses are a type of Lightning Network payment request based on the LNURL protocol that allows users to receive bitcoin payments directly to their Lightning wallet. They look just like an email address, but instead of emails, you can receive Lightning payments with it.

Lightning Addresses can look different depending on the service that the payment recipient uses.

For example, a Blink user's Lightning Address will look like <username@blink.sv>, while a Wallet of Satoshi user's Lightning Address might look like <username@walletofsatoshi.com>.

Regardless of the format, all Lightning Addresses are unique to the recipient, allowing them to receive Lightning payments securely and easily.


# Do all wallets support Lightning Addresses?

Many popular wallets have added support for Lightning Addresses, but there are still some that don't support it.

Quite many Lightning wallets support sending to a Lightning Address. Fewer Lightning wallets can provide a Lightning Address to their users to receive payments.

Blink users can do both, send to Lightning Addresses and receive payments from other wallets who support sending to Lightning Address.

You can find an overview of the various Lightning Wallets and their support for Lightning Address [here](https://github.com/andrerfneves/lightning-address/blob/master/README.md#wallets-supported).


# How can I create Lightning Address with Blink?

Your Lightning Address in Blink is generated using the username you created for your Blink account. If you haven’t chosen a username yet, you can follow these instructions to do so:

* Click on settings
* Click on “receive payments using your Lightning Address address or the merchants feature
* Write your username

Your Lightning Address will look like this: <username@blink.sv>, where \[username] is your personal Blink username that you set. You can share your Lightning Address to receive Lightning payments from other compatible wallets.

By following these steps and setting a Blink username, you will also have unlocked the Point of Sale (PoS or Cash Register) and Paycode features. The PoS allows you to generate invoices for Lightning payments in a quick and easy way. Your unique Paycode is a static QR code that always stays the same and that you can receive Lightning payments to. You can print it out or share it on social media to receive variable amounts of Lightning payments e.g. tips, donations or other payments.


# How can I use Lightning Address to send and receive money with Blink?

To send a payment to a Lightning Address:

1. Copy their Lightning Address (e.g. <username@blink.sv>)
2. Click on "Send" in your Blink home screen
3. Paste the Lightning Address in the destination section
4. Add the amount you want to send and click "Send"

To receive payments using Lightning Address:

1. Open the settings menu in the top right of your Blink home screen
2. Find "Your Blink Address"
3. Copy your Lightning Address (e.g. <username@blink.sv>) by clicking on it
4. Share your Lightning Address with the person who wants to pay you\\


# What is the Point of Sale (PoS or Cash Register) in Blink

The Point of Sale in Blink is a convenient way to receive bitcoin payments. It's especially useful for merchants to receive payments directly into their wallets, without relying on a single device, making it an easy and cost-effective way to have a functioning POS in their stores.

To use the PoS, click the menu in the top right of your Blink home screen and go to "Ways to get paid". Here you will find the link to your PoS, e.g. pay.blink.sv/username.

* You can open the PoS link in any browser and create Lightning invoices in a quick and easy way.
* You can share the PoS link with your customers: when a customer opens the link, they will be directed to PoS where they can enter the amount they wish to pay and complete the transaction.
* You can share the PoS link with your employees or staff and let them receive payments on your behalf. Keep in mind, that any amount sent to invoices generated in your unique PoS goes directly into your Blink account. The PoS is only for receiving payments, not sending. Sharing your PoS link with an employee or customer allows them to receive payments on your behalf — it does not give them the ability to send or withdraw funds from your account.

The PoS feature also provides a simple way to keep track of your sales and generate reports to help you keep track of your business transactions.


# How can I use Blink's Point of Sale feature?

There are two ways to use the Blink Point of Sale:

**Option 1:**

1. Click on the menu in the top right of your Blink home screen
2. Click on "Ways to get paid"
3. Here you will find your v link
4. You can share this link with your employees, clients, or add it directly to your social media, website, or blog to receive payments.

**Option 2:**

1. Go to [pay.blink.sv](https://pay.blink.sv/)
2. Enter your Blink username or Log in with Blink
3. Start receiving payments using your unique Blink Point of Sale

By using the Point of Sale, you can easily receive payments directly to both accounts (BTC / USD) without relying on a single device. It's an ideal solution for small business owners who need a functioning POS system without the added costs of traditional payment processors.


# What is a Paycode and how can I use it?

Blink's Paycode is based on the LNURL protocol. It allows users to create a static QR code that can be used to receive Lightning payments. Your unique Paycode QR can be displayed on a screen or printed out, making it a versatile and convenient way to accept payments in a variety of settings.

Your Blink Paycode is compatible with all Lightning wallets, however only Lightning wallets with LNURL support can pay to it directly.

Users of Lightning Wallets that do not support LNURL must scan the Paycode with their mobile phone's native camera and follow the link. They will be directed to your unique Point of Sale (PoS or Cash Register) where they can generate a Lightning invoice to pay you.

Payers can set the amount they want to pay to your Paycode in their Lightning wallet, as well as add a description for the payment.

To find your unique Paycode:

1. Clicking on the menu in the top right of your Blink home screen
2. Go to "Ways to get paid"
3. The link to your Paycode is shown here


# Dollar Balance


# What is the Dollar Balance?

The Dollar Balance lets you hold a stable USD-denominated balance alongside your Bitcoin Balance in the Blink App.

In Custodial Mode, the Dollar Balance is powered by Stablesats — a mechanism that uses Bitcoin derivatives markets to maintain dollar-equivalent value without stablecoins or fiat integration. In Non-Custodial Mode, the Dollar Balance holds the USDB stablecoin (issued by Brale) on the Spark protocol.

The Dollar Balance is not available in all jurisdictions or modes. The Blink App shows whether it is available for your account. If you prefer to keep everything in Bitcoin, select your Bitcoin Balance as the default account in Settings.


# How does the Dollar Balance work in Custodial Mode?

In Custodial Mode, the Dollar Balance is powered by Stablesats. Stablesats uses Bitcoin derivatives markets — specifically perpetual inverse swap contracts — to create a synthetic US dollar position. Bitcoin is used as collateral to open a position that maintains a value of 1 US dollar, regardless of fluctuations in the Bitcoin price.

This allows users to hold, send, and receive dollar-equivalent value in their wallet without stablecoins or fiat integration. For details and risks, see the Terms and Conditions.

The [video](https://www.youtube.com/watch?v=FGO4dbwMYwg) outlines the basic mechanics of this strategy.

In Non-Custodial Mode, the Dollar Balance uses the USDB stablecoin (issued by Brale) on the Spark protocol. See the Terms and Conditions for details.


# How does the Custodial Dollar Balance compare to stablecoins?

The Custodial Dollar Balance (powered by Stablesats) differs from traditional stablecoins in several ways:

* **Interoperability:** It operates over Bitcoin and Lightning, so users can transact with anyone on those networks without worrying about which blockchain or token their counterparty uses.
* **No reserve assets:** Unlike stablecoins pegged to fiat reserves, Stablesats uses derivatives positions — there are no underlying dollar reserves or collateral requirements in the traditional sense.
* **Counterparty risk:** Stablesats relies on the exchanges where collateral is deposited for perpetual inverse swap contracts. This introduces exchange counterparty risk, which can be mitigated by diversifying across multiple exchanges.

For risks and limitations, see [What are the risks associated with the Dollar Balance?](/stablesats/what-are-the-risks-associated-with-stablesats) and the Terms and Conditions.


# Are there any regulatory considerations for the Dollar Balance?

The regulatory landscape for dollar-denominated features varies by jurisdiction. The Dollar Balance is not available in all countries or modes — the Blink App shows whether it is available for your account.

In Custodial Mode, the Dollar Balance is powered by Stablesats (a derivatives-based mechanism). In Non-Custodial Mode, it holds the USDB stablecoin. Each mechanism may be subject to different regulatory treatment depending on your jurisdiction. See the Terms and Conditions for applicable terms and restrictions.


# What are the risks associated with the Dollar Balance?

The Dollar Balance carries risks that vary by mode. In Custodial Mode (Stablesats):

One of the risks of using Stablesats is counterparty risk with the exchange. If the exchange goes under, the collateral may be unrecoverable. This risk is inherent to any product that involves a third-party custodian, which is why it is important to choose a reputable exchange and conduct due diligence before using any financial product.

Another risk to consider is the auto-deleveraging feature of derivatives exchanges for perpetual contracts. The position could be closed despite being in profit, which can lead to an under-hedging situation. This risk is specific to the use of derivatives products, and users should be aware of the potential for auto-deleveraging when using Stablesats.

Funding is another potential risk associated with Stablesats. Historically, there have been more longs than shorts on derivatives exchanges, meaning that funding is revenue-generating for short positions. However, this may not always be the case, and funding could go negative for an extended period of time. Users should be aware of this risk and monitor the funding rates when using Stablesats.

It is important to note that Stablesats is a relatively new feature, and its risks and benefits are still being studied and evaluated by the Bitcoin community. To learn more about Stablesats and its associated risks, users can view the [GitHub repository](https://github.com/GaloyMoney/dealer), read relevant resources such as [Luna Bros, Inc.](https://blog.bitmex.com/luna-brothers-inc/) (Bitcoin-Backed Stablecoins section) and thoughts from [Kollider,](https://twitter.com/kollider_trade/status/1496507594214723590) and consult with financial professionals.

In Non-Custodial Mode, the Dollar Balance holds USDB, a stablecoin issued by Brale. USDB carries its own risks, including issuer and smart-contract risk. See the Terms and Conditions for details.


# Transaction Fees

Transaction fees are an important consideration when using the Blink wallet to send or receive Bitcoin payments. Fees can vary depending on the transaction method used, whether it's intraledger, on-chain or Lightning Network transactions. In this section, we will cover frequently asked questions about transaction fees, including how to set fees, what factors affect fees, and how to ensure your transaction is processed efficiently while keeping fees low.


# What are the transaction fees for using Blink wallet?

Blink's transaction fees depend on the transaction method, current market conditions, and your account. Your current fees are displayed in the Blink App when you initiate a transaction.

|                                       | Deposits                                        | Withdrawals                                |
| ------------------------------------- | ----------------------------------------------- | ------------------------------------------ |
| **Intraledger**                       | No service fee                                  | No service fee                             |
| **Lightning**                         | No service fee; the sender pays LN routing fees | No service fee; routing fees apply         |
| **On-chain**                          | Fixed fee (varies by amount) + mining fees      | Fixed fee (varies by amount) + mining fees |
| **Bitcoin ↔ Dollar Balance Transfer** | Spread applies                                  | Spread applies                             |

Fees are cumulative. For example, an on-chain withdrawal includes the fixed fee + mining fee + any applicable surcharges. See the Blink App for current amounts.


# What are mining fees?

Mining fees are small amounts of Bitcoin that you pay to get your transactions confirmed by the network. The fees are paid to miners, who are special computers that secure the network and confirm transactions. These fees ensure that your transactions are processed quickly and securely. Blink does not keep any of the transaction fees, they go directly to the miners.

The amount of mining fees you need to attach to your transaction depends on several factors, including the congestion level of the network, the size of your transaction in bytes, and the current demand for block space. During times of high network traffic, fees tend to increase, and during times of low traffic, fees tend to decrease.

If the mining fees calculated are more than the 10% of the amount you are preparing to send Blink will show a notification: `High fee! We recommend Lightning.`


# What determines mining fees?

The amount of fees you need to pay for a Bitcoin on-chain transaction is determined by two factors:

1. Network congestion: When there are many pending transactions waiting to be confirmed, the fees tend to go up to incentivize miners to prioritize your transaction.
2. Transaction size: The larger your transaction in bytes, the more fees you will need to pay as miners prioritize transactions with larger fees per byte.

Therefore, during times of high network congestion, fees can increase significantly, making transactions more expensive. It's always recommended to check the current network conditions before sending a transaction to ensure you're paying an appropriate fee.


# Are there any fees for transactions between two Blink wallets?

No, there are no transaction fees for sending or receiving Bitcoin within the Blink wallets.

Transactions between two Blink wallets are considered internal and are processed without any additional charges. However, when sending Bitcoin to external wallets, regular network fees may apply depending on the type of transaction (on-chain or lightning)


# What are the fees for sending Bitcoin from my Blink wallet to another wallet?

The transaction fees vary depending on the type of transaction, whether it's an on-chain transaction or a Lightning transaction.

For sending Lightning payments, a routing fee is paid by the user, but there are no extra fees applied by Blink.

Blink's on-chain transaction fees are composed of:

1. [**Miner fee**](/transaction-fees/what-are-mining-fees) — paid according to the current mempool state.
2. **Tiered fixed fee** — varies by withdrawal amount. See the Blink App for current tiers.
3. **Imbalance surcharge** — an additional fee may apply for accounts exceeding the Lightning/on-chain imbalance threshold in a rolling window.

The exact amount of transaction fees may vary depending on the current market conditions and network congestion. See the Blink App for current fees.


# Why does Blink have a Lightning - onchain imbalance threshold?

Blink has implemented a Lightning/on-chain imbalance threshold in a rolling window to help keep fees low for small transactions with low monthly volume.

The imbalance between Lightning and on-chain transactions can impact the liquidity of Blink and result in increased costs. By setting this threshold, we can ensure that our network remains efficient and cost-effective for all users. See the Blink App for your current threshold and any applicable surcharges.


# What are the fees for receiving Bitcoin in my Blink wallet?

When you receive a **Lightning transaction** in your Bitcoin wallet in Blink, there is no fee charged to you by Blink. However, the sender will pay a Lightning routing fee to cover the cost of routing the payment through the Lightning Network. This routing fee is not retained by Blink.

When you receive an **on-chain transaction** in your Bitcoin wallet in Blink, a tiered fixed fee applies (the amount depends on the transaction size — see the Blink App for current tiers). Note that on-chain deposits must exceed a minimum amount (the dust threshold plus the deposit fee) to be processed. Consider using Lightning to receive small payments where there is no minimum amount. The sender also pays a miner fee, which is not retained by Blink.

When you receive a payment to your Dollar Balance, a spread applies for the transfer. See the Blink App for current rates.


# What are the fees for transferring between your Bitcoin Balance and Dollar Balance?

When you transfer funds between your Bitcoin Balance and Dollar Balance, a spread is applied and retained by Blink. The current spread is displayed in the Blink App when you initiate a transfer.

The same spread applies in both directions — Bitcoin Balance to Dollar Balance, and Dollar Balance to Bitcoin Balance.

In Custodial Mode, the Dollar Balance is powered by Stablesats. In Non-Custodial Mode, it uses the USDB stablecoin. See the Terms and Conditions for details.


# What is a fee reimbursement in Blink, and when does it happen?

When you send a Bitcoin payment using the Lightning Network through Blink, the app attempts to determine the most accurate routing fee by probing different payment paths. This process is indicated by a spinning circle on the send screen.

However, sometimes the probing may fail due to certain nodes not responding, or you might choose to send the payment before the probing completes. In such cases, Blink charges an estimated fee, which might be higher than the actual fee incurred once the payment is settled.

To ensure fairness, Blink automatically reimburses the difference between the estimated fee charged and the actual fee paid. This reimbursement is credited back to your balance and appears as a transaction labeled "Fee Reimbursement."

**Example:**

• You send a payment, and Blink estimates the fee to be 100 sats due to incomplete probing.

• After the payment is settled, the actual fee turns out to be 20 sats.

• Blink reimburses you 80 sats, which is the difference between the estimated and actual fees.

**Tips to Minimize Overestimated Fees:**

• Wait for the spinning circle to stop before confirming your payment. This allows Blink to complete the probing process and calculate a more accurate fee.

• Ensure a stable internet connection to facilitate successful probing.

By following these tips, you can help Blink determine the most accurate fees and reduce the likelihood of overestimated charges.


# Earn Section

The Earn Section of Blink is a gamified educational feature that rewards users with sats for learning about Bitcoin. By accessing the Earn section in the bottom right of Blink app, users can answer a series of questions related to money, bitcoin and its underlying technology.

Each correct answer earns the user a predetermined amount of sats, which are automatically credited to their wallet upon completion. This not only encourages users to expand their knowledge about bitcoin, but also allows them to accumulate sats without having to invest additional funds.


# How does the earn section work?

The Earn Section of Blink is a fun way for our users to earn sats by learning the basics about bitcoin.

Go to the Earn section of your Blink (bottom right). Answer the questions correctly to earn some sats that will appear automatically on your wallet.

You can only earn the sats when you complete the quiz the first time and there is only one chapter available per day. Nevertheless, once have been through it once you can always come back for a refresh read!


# Why is Earn wallet depleted?

The Earn wallet may occasionally be depleted as we regularly add funds to ensure a sustainable earning experience for our users. If you find that your Earn wallet is currently empty, we recommend trying again in the upcoming days. Earn wallet will be replenished with new funds in 24 hours to continue supporting your earning activities. Thank you for your patience and understanding. If you have any further questions or concerns, feel free to contact us at <support@blink.sv> for assistance.


# What does the 'Unsupported phone carrier for quiz' error mean?

The "Unsupported phone carrier for quiz" error that appears while using the Earn feature indicates that either:

* you have removed the phone number from your Login Methods. You can use Earn again if you verify your phone number again. Add your phone number back in the Blink app `Settings` - under `Login Methods` - `Tap to add phone number`.
* the phone number registered to your account originates from a restricted area. This limitation is not related to your account specifically, but is necessary to curb malicious activities from that region. We are unable to offer a workaround at this time. However, we are exploring future enhancements to the Earn feature that would allow its use without involving payments.

If you're interested in the content, you can access an approximate version at [earn.blink.sv](https://earn.blink.sv/). Additionally, the most recent updates can be found in the wallet source code on GitHub at: [github.com/blinkbitcoin/blink-mobile/blob/main/app/i18n/en/index.ts](https://github.com/blinkbitcoin/blink-mobile/blob/main/app/i18n/en/index.ts#L84-L2032)\\


# Blink Merchant Map

Welcome to the Merchant Map section of the Blink FAQ. In this section, we will cover common questions related to the Merchant Map feature available in the Blink app. The Merchant Map allows you to easily find merchants in your area that accept Bitcoin as a payment method, making it easier for you to use your Bitcoin in day-to-day transactions. Whether you're looking for a coffee shop or a clothing store, the Merchant Map has got you covered. Let's dive into some frequently asked questions about this feature.


# What is Blink's map feature?

The Map feature in Blink allows users to easily locate businesses that accept Bitcoin payments. By accessing the Map feature, users can view all registered businesses and their locations.

Additionally, the Map feature allows users to make payments directly to a merchant by clicking the “Pay to this business” button that appears when a business pin is clicked. This streamlines the payment process and makes it more convenient for both customers and merchants.

If you are a business that accepts Bitcoin payments and would like to be listed on the Map feature, simply contact us at <support@blink.sv> for instructions on how to register your business.

When you open the map the first time or click the location icon you can allow Blink to access your device's location which make the merchant map default to your current location.


# How can I add my business to Blink's Merchant Map?

To add your business to Blink's Merchant Map, you can directly visit [map.blink.sv](https://map.blink.sv/). Once there, you can add your business by providing the latitude and longitude coordinates of your establishment. This will ensure that your business is accurately represented on the map for users to discover.

By adding your business to the Blink Merchant Map, you will make it easier for potential customers to find you and pay with Bitcoin using the Blink app. Don't hesitate to contact us at <support@blink.sv> if you have any questions or need assistance with the process.


# How can I remove my business from Blink's merchant map?

If for any reason you would like to remove your business from the Blink Merchant Map, contact us at <support@blink.sv> and we will be happy to assist you with the process.

We understand that business needs and circumstances can change, and we want to make sure that our map feature accurately reflects the current state of all registered businesses. Our team will work with you to ensure that your business is removed from the map as quickly and smoothly as possible, while also addressing any questions or concerns you may have.

Please note that once your business is removed from the map, it may take some time for the changes to fully propagate through our system.


# Blink & Other Wallets

Interoperability is an important aspect of any Lightning wallet. In this section, we will cover frequently asked questions about how Blink interacts with other wallets in the bitcoin ecosystem. We will provide information on the compatibility of Blink with various wallets, as well as details on how to transfer funds between Blink and other wallets. Additionally, we will address any concerns related to security and transaction fees associated with interoperability.


# Chivo wallet and ATM

The Chivo wallet is the official Bitcoin wallet of El Salvador. It is available for both Android and iOS devices. The wallet is integrated with the Chivo ATM network, which allows users to withdraw and deposit cash at any of the 200+ ATMs located throughout the country. The wallet also supports Lightning payments (but not shows that by default), which allows users to send and receive Bitcoin instantly and with low fees.

## Receive on Lightning with Chivo

* When receiving Chivo shows the on-chain method by default which can be expensive and slow.
* To receive on Lightning tap `Recibir Bitcoin via Lightning` and show the QRcode to the payer.

## Chivo ATM

* The Chivo ATMs receives from external wallets on-chain only which can be expensive and slow.
* If you have a Chivo wallet you can withdraw cash from the ATM free of charge
* To use the ATM free of charge with your funds in the Blink wallet use Lightning to transfer your funds to the Chivo wallet and withdraw from the ATM

## Infographic to receive on Lightning with the Chivo wallet

![Receive on lightning with Chivo](/files/FE40Jc4AVoKxKTVCkmV7)


# How to prove that a lightning invoice was paid?

In the realm of the Lightning Network (LN), a Proof of Payment (PoP) serves as a verifiable acknowledgment that a specific transaction has successfully occurred. Lightning payments are atomic meaning that if there is a pre-image received by the payer the payment was surely received by the destination node.

**How Does Proof of Payment Work in the Lightning Network?**

1. **Invoice Generation by the Payee's Node**:
   * The process begins with the creation of a Lightning Network invoice by the payee's node. This invoice is not just a simple payment request but a complex structure comprising various elements crucial for the transaction. One of the critical components of this invoice is a cryptographic hash of a secret, known as the 'payment pre-image'.
2. **Invoice Signing**:
   * To ensure authenticity and prevent tampering, the payee's node digitally signs the invoice. This signature is a cryptographic proof that the invoice was indeed generated by the actual owner of the node and not an imposter.
3. **Payment and Disclosure of Pre-Image**:
   * Once the payer decides to fulfill the invoice, the payment is routed through the Lightning Network to reach the payee. Upon successful receipt of the payment, the payee's node releases the 'payment pre-image' to the payer. This pre-image is essentially the secret whose hash was included in the invoice.
4. **Combination of Invoice and Pre-Image as Proof of Payment**:
   * The final step in establishing a Proof of Payment is the combination of the original LN invoice and the payment pre-image. The payer can use these two pieces to prove that a payment was made to the payee. Essentially, with this two pieces of information anyone can verify that the hash in the invoice corresponds to the pre-image provided upon payment, proving that the transaction indeed occurred as claimed.

**Why is Proof of Payment Important?**

1. **Verification of Payment**:
   * PoP is crucial for parties to confirm that the transaction was processed correctly without needing to relying on a third party.
2. **Non-repudiation**:
   * With the cryptographic evidence provided by the PoP, the payee cannot deny receiving the payment, and similarly, the payer cannot deny making the payment. This is crucial for dispute resolutions and trust-building in digital transactions.
3. **Security**:
   * The cryptographic nature of the invoice and the pre-image ensures that the transaction is secure and resistant to tampering or fraud.

**In summary to prove a lightning invoice was paid there are two pieces of information needed:**

1.The original **Lightning Invoice** provided by the node 2.The **payment pre-image** received by the payer on the successful payment

Please if you are contacting the Blink support team or operators of other lightning nodes have this information at hand.


# Blink Circles

Welcome to the Blink Circles FAQ section. Here, we'll provide you with all the answers you need about our latest feature, Blink Circles. Designed to enhance your Bitcoin journey, Blink Circles empowers you to introduce Bitcoin to your friends and network through the Blink app.

This section is dedicated to addressing any questions you may have about Blink Circles – from how it works to how you can maximize your experience. Explore this space to learn how to track your progress, share your accomplishments with friends, and even participate in engaging challenges to earn exciting rewards like money, SWAG, conference tickets, and more.


# What is Blink Circles?

Blink Circles is an innovative feature within the Blink app designed to enhance your Bitcoin journey. It serves as a tool to track your progress while introducing others to Bitcoin through the Blink platform.

With Blink Circles, you can not only view your own stats, but also share your accomplishments with friends and engage in exciting challenges. As you participate, you'll have the opportunity to earn various rewards such as money, SWAG, conference tickets, and more.

In the upcoming questions, we'll delve into the details of Blink Circles, including the concept of inner and outer circles, providing you with a comprehensive understanding of this engaging feature.


# What is Blink "Inner Circles?

Your **Inner Circle** consists of all the Blink users whom you have personally introduced to the world of Bitcoin by sending them their first satoshis from your Blink account to their Blink account.

Each new Blink user can be a part of only one person's inner circle. You can expand your inner circle by being the first to send more people sats through Blink. This unique concept fosters a sense of connection and growth within the Blink community.


# Will my circles data or username be published for others to see?

Blink will only share your username or Circles stats if one of the following are met:

* You share your username and Blink circles publicly on social media
* You opt in to participate in leaderboards where your name and stats would be shown


# Do I get paid for sharing my invite link or adding people to my circles?

No, there is no standard reward for sharing your link or growing your circle.

Instead you can participate in monthly circles challenges to earn sats, SWAG, conference tickets and other items.

Circles challenges are intended to reward real individuals for educating and onboarding other people to Bitcoin and Blink. There are measures in place to detect misuse and abuse of the program, and Blink reserves the right to withhold rewarding any accounts suspected of this behavior. If you believe that a reward has been improperly withheld, send an email with the subject “Circles Reward” to <support@blink.sv>. In the email, provide your username and/or phone number associated with the account.


# Security Settings

Choose the security features that best suit your needs


# 2FA

Add 2FA on your Blink Wallet to improve your wallet security

🔒 Add an additional layer of security to your Blink Wallet:

1. Open **Settings** ⚙️
2. Go to **Security and Privacy** 🔐
3. Select **Two-Factor Authentication** 🔑


# On-Device Security

Select the security features that you prefer

1. Open Settings ⚙️
2. Navigate to Security and Privacy 🔐
3. Select On-Device Security 📱

Here, you can set up:

* Biometric Unlocking 👆
* Pin Code as backup for biometric authentication 🔑
* Hide Balance by Default to keep your balance hidden on the home screen when the app starts 🥷


# Custody & Security




---

[Next Page](/llms-full.txt/1)