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SubWallet makes it easy to purchase cryptocurrency with fiat currency (USD, EUR, etc.) through integrated on-ramp providers. You can buy tokens directly in the extension without leaving the app.

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Supported On-Ramp Services

SubWallet integrates with multiple trusted on-ramp providers:
  • Transak - Wide currency and payment method support
  • Banxa - Available in 100+ countries
  • Coinbase Pay - Direct integration with Coinbase
  • Meld - Support for various payment methods
Each service has different:
  • Supported tokens and chains
  • Payment methods (card, bank transfer, etc.)
  • Geographic availability
  • Fees and limits

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How to Buy Tokens

1

Open Buy Tokens

From the main wallet screen, look for the Buy button or navigate to the Buy section
2

Select Token

Choose the cryptocurrency you want to purchase
Not all tokens are available through all services. SubWallet will show you which services support your selected token.
3

Select Account

Choose which account should receive the purchased tokens
  • The account must be compatible with the token’s blockchain type
  • For EVM tokens, use an Ethereum-type account
  • For Substrate tokens, use a Polkadot-type account
4

Choose Service Provider

Select your preferred on-ramp service from the available optionsSubWallet will show:
  • Supported payment methods
  • Estimated fees
  • Service availability
5

Review Disclaimer

Read and accept the service provider’s terms
SubWallet acts as an aggregator. The actual purchase is processed by the third-party on-ramp provider. Review their terms, fees, and policies before proceeding.
6

Complete Purchase

You’ll be redirected to the provider’s website to:
  1. Enter purchase amount
  2. Provide payment information
  3. Complete KYC verification (if required)
  4. Confirm the transaction
The tokens will be sent directly to your selected SubWallet address once the payment is confirmed.

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Supported Tokens

Common tokens available for purchase include:

Bitcoin (BTC)

Bitcoin network

Polkadot (DOT)

Polkadot relay chain

Kusama (KSM)

Kusama relay chain

Ethereum (ETH)

Ethereum mainnet
Many other tokens are supported including:
  • Stablecoins (USDT, USDC, DAI)
  • Substrate ecosystem tokens
  • EVM-compatible chain tokens
  • Layer 2 tokens
The available tokens depend on the selected on-ramp service and your geographic location.

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Payment Methods

Available payment methods vary by provider:
  • Credit/Debit Card - Instant but higher fees
  • Bank Transfer - Lower fees, 1-3 day processing
  • Apple Pay / Google Pay - Quick mobile payments
  • Other methods - Depending on provider and region

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Fees and Limits

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Transaction Fees

On-ramp services charge fees that typically include:
  • Service Fee - Provider’s commission (1-5%)
  • Network Fee - Blockchain transaction cost
  • Payment Processing - Credit card or bank fees
Compare fees between different providers for your specific purchase to find the best rate.

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Purchase Limits

Limits vary by:
  • Service provider
  • Payment method
  • KYC verification level
  • Geographic location
Most services have:
  • Minimum: $20-50 USD
  • Maximum: $500-10,000 per transaction (higher with full KYC)

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Geographic Restrictions

On-ramp services are subject to regional regulations:
  • Available Globally: Most major regions supported
  • Restricted Regions: Some countries have limitations due to local regulations
  • Payment Methods: Vary by country
If a service is not available in your region, try a different provider from the list.

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KYC Requirements

Know Your Customer (KYC) verification may be required:

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When KYC is Required

  • First-time users of a service
  • Purchases above certain limits
  • Specific geographic regions
  • Regulatory requirements

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KYC Process

Typically involves providing:
  • Government-issued ID
  • Proof of address
  • Selfie verification
  • Additional documents (for higher limits)
KYC is handled entirely by the on-ramp provider, not SubWallet. Your information is shared only with the selected service.

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Transaction Timeline

  1. Initiation: Immediate
  2. Payment Processing:
    • Card: Instant to 15 minutes
    • Bank: 1-5 business days
  3. Token Delivery: After payment confirmation
    • Usually within 10-30 minutes
    • Can take longer during network congestion

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Tracking Your Purchase

After completing a purchase:
  1. You’ll receive a confirmation from the provider
  2. Transaction ID for tracking
  3. Email updates on status
  4. Tokens appear in your wallet once confirmed
Check your Transaction History in SubWallet to see incoming transfers.

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Troubleshooting

Common reasons:
  • Payment method declined (contact your bank)
  • Insufficient verification (complete KYC)
  • Geographic restrictions
  • Service limits exceeded
Try:
  • A different payment method
  • Another on-ramp service
  • Contacting the provider’s support
If tokens haven’t appeared after the expected time:
  1. Check the transaction status with the provider
  2. Verify the recipient address was correct
  3. Check if there’s network congestion
  4. Contact provider support with your transaction ID
Allow sufficient time for processing. Bank transfers can take several days.
Not all tokens are supported by all providers:
  • Try a different on-ramp service
  • Consider buying a common token (ETH, BTC) and swapping it
  • Check if the token is available on exchanges
On-ramp fees are set by providers:
  • Compare multiple services for better rates
  • Bank transfers usually have lower fees than cards
  • Larger purchases often have better fee percentages
  • Consider the total cost including network fees

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Best Practices

Security Tips

  • Only use on-ramps integrated in SubWallet
  • Verify you’re on the official provider website
  • Never share your seed phrase with on-ramp services
  • Keep records of all transactions
  • Be cautious of phishing attempts

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Getting the Best Rates

  • Compare Providers: Check multiple services for the same purchase
  • Payment Method: Bank transfers typically cheaper than cards
  • Purchase Amount: Larger amounts may have better fee percentages
  • Network Fees: Consider blockchain congestion times
  • Timing: Some providers have promotional periods

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For First-Time Buyers

  1. Start with a small test purchase
  2. Complete KYC early to avoid delays
  3. Save your transaction IDs
  4. Understand the fees before confirming
  5. Allow extra time for first transactions

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Support

For issues with on-ramp purchases:
  • SubWallet Issues: GitHub Issues
  • Provider Support: Contact the specific on-ramp service directly
    • They handle payment processing and KYC
    • Have your transaction ID ready
SubWallet provides the interface to access on-ramp services but does not process the purchases. For payment or delivery issues, contact the on-ramp provider directly.

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