iFrame initialization

Required Parameters

apiKey: Your publishable API key for customer and transaction assignment. Also known as the public key.
currencyCode: The cryptocurrency code (e.g., BTC, ETH, BCH) for purchase. See for more options. If multiple walletAddress are set, this will be the default cryptocurrency.
walletAddress: The destination cryptocurrency wallet address for purchased funds.
- If using one address it'll look like this: walletAddress=ltc1q2k0xaafhgt3s8qw03wmajjmlc8gcepdy0un0ah
- If you want to accept multiple currencies, for example, Bitcoin, Litecoin, and Dogecoin, format the walletAddress parameter as follows: walletAddress=BTC:yourBitcoinAddress,LTC:yourLitecoinAddress,DOGE:yourDogecoinAddress

If you want to accept multiple currencies, for example, Bitcoin, Litecoin, and Dogecoin, format the walletAddress parameter as follows: walletAddress=BTC:yourBitcoinAddress,LTC:yourLitecoinAddress,DOGE:yourDogecoinAddress

Optional Parameters

language: Specify the widget's language using an . The language will default to EN (English) if the parsed language is not supported. All supported languages can be found .
method: Specify the payment method that will be pre-selected upon opening the widget. You'll have to use the slug mentioned e.g. method=apple-pay . If the provided method is not available in the user's geo, the default method will be selected instead.
baseCurrencyCode: The fiat currency code for transactions (e.g., USD, EUR, GBP). See for more options.
lockBaseCurrency: (True/False) Locks the currency selection to the provided baseCurrencyCode. This prevents the user from making payments in other currencies and will remove payment methods where the provided currency is unsupported.
baseCurrencyAmount: The fiat currency amount to be spent, in integer form. 2 decimals max. Cannot be zero if set.
quoteCurrencyAmount: The cryptocurrency amount to be purchased, in integer form. 3 decimals max. Minimum 7 EUR and 8 USD equivalent of the given crypto.
email: Prefills the customer's email address on the login page.
externalCustomerId: Your unique identifier for the customer.
redirectUrl: The URL for redirection after purchase completion. Must be URLencoded, e.g. https%3A%2F%2Fwebhook.site You may include dynamic order information by using the following variables in your URL:
- {orderId} - Will be replaced with the actual order ID
- {orderStatus} - Will be replaced with the final status of the order

Examples of how the parameter can be used:

Without variables:

redirectUrl=https%3A%2F%2Fwebhook.site

With variables:

redirectUrl=https%3A%2F%2Fwebhook.site%2FSwapped%3ForderId%3D%7BorderId%7D%26orderStatus%3D%7BorderStatus%7D

customerKYC: The level of Know Your Customer (KYC) verification. customerKYC = 0 means the customer has not completed KYC. customerKYC = 1 means the customer has completed Proof of ID + Liveness Check. customerKYC = 2 means the customer has completed Proof of ID + Liveness Check + Proof of Address.
destinationTag: Adds a numeric destination tag (XRP) or text memo (TON) to identify specific recipients or provide transaction context.
coverFees: (True/False) Sets processing and handling fees to zero for the customer. Fees will be included through the spread.
minAmount: Sets the minimum order amount in EUR. This cannot be lower than 7 EUR.
lockAmount: (True/False) Locks the fiat and crypto fields for the user.

Server-Side URL Signature

Generate a signature to prevent the URL from being modified. This is done using the query string, including '?' and the secret key shared with you.

Example with NodeJS

// Import the crypto module.
import crypto from 'crypto';

// Define the public API key.
const publicKey = 'your_public_key';

// Define the secret API key.
const secretKey = 'your_secret_key';

// Define the currency code.
const currencyCode = 'currency_code';

// Define the wallet address.
const walletAddress = 'your_wallet_address';

// Build URL with query parameters.
const originalUrl = `https://widget.swapped.com?apiKey=${publicKey}&currencyCode=${currencyCode}&walletAddress=${walletAddress}`;

// Create a SHA-256 HMAC signature from the URL's search string, then encode in Base64.
const signature = crypto.createHmac('sha256', secretKey).update(new URL(originalUrl).search).digest('base64');

// Append the URL-encoded signature to the original URL.
const urlWithSignature = `${originalUrl}&signature=${encodeURIComponent(signature)}`;

// Output the final URL with the signature appended.
console.log(urlWithSignature);

Example with PHP

<?php

// Define the public API key.
$publicKey = 'your_public_key';

// Define the secret API key.
$secretKey = 'your_secret_key';

// Define the currency code.
$currencyCode = 'currency_code';

// Define the wallet address.
$walletAddress = 'your_wallet_address';

// Build URL with query parameters.
$originalUrl = "https://widget.swapped.com?apiKey={$publicKey}&currencyCode={$currencyCode}&walletAddress={$walletAddress}";

// Parse the URL into its components.
$parsedUrl = parse_url($originalUrl);

// Create a SHA-256 HMAC signature from the query string, then encode in Base64.
$signature = base64_encode(hash_hmac('sha256', '?'.$parsedUrl['query'], $secretKey, true));

// Append the URL-encoded signature to the URL.
$urlWithSignature = "{$originalUrl}&signature=" . urlencode($signature);

// Output the final URL with the signature appended.
echo $urlWithSignature;

Example iFrame URL

Note: this is a test key, your key will be different.

Example iFrame

The iFrame has been optimized for height: 585px; width: 445px;.

<iframe allow="accelerometer; autoplay; camera; encrypted-media; gyroscope; payment; clipboard-read; clipboard-write" src="https://widget.swapped.com?apiKey={pk_live_key}&currencyCode=btc&signature=lorem" title="Buy crypto with Swapped" style="height: 585px; width: 445px; border-radius: 
0.75rem; margin: auto;"></iframe>

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