Use Cases

Explore common implementation patterns and use cases for the Bultra platform.

On-Ramp (Fiat to Crypto)

On-ramping enables users to convert fiat currency into cryptocurrency. This is one of the most common use cases for crypto exchanges, wallets, and DeFi applications.

Overview

The on-ramp flow allows your users to:

• Deposit fiat currency (USD, GBP, EUR) from their bank account
• Exchange fiat for stablecoins or cryptocurrencies
• Receive crypto in their Bultra account or withdraw to external wallet

Implementation Flow

1. Customer Onboarding: Create an application for your user with required KYC information and documents
2. Account Setup: Once approved, the customer receives fiat and crypto accounts
3. Counterparty Creation: Set up the user's bank account as a counterparty for deposits
4. Fiat Deposit: Create a payment (collection) to receive fiat from the user's bank
5. Currency Exchange: Exchange fiat for the desired cryptocurrency using the exchange API
6. Optional Withdrawal: If needed, withdraw crypto to an external wallet

Example Flow

// 1. Create fiat deposit (collection)
POST /v1/payments
{
  "counterparty_id": "cpty_bank_123",
  "account_id": "acc_usd_456",
  "amount": "1000.00",
  "currency": "USD"
}

// 2. After deposit completes, exchange USD for USDC
POST /v1/exchanges
{
  "source_account_id": "acc_usd_456",
  "destination_account_id": "acc_usdc_789",
  "action": "FIX_SOURCE",
  "amount": "1000.00"
}

// 3. Optionally withdraw to external wallet
POST /v1/withdrawals
{
  "counterparty_id": "cpty_wallet_abc",
  "account_id": "acc_usdc_789",
  "amount": "995.00"
}

Key Considerations

• KYC Requirements: Users must complete identity verification before transacting
• Bank Verification: Counterparties undergo AML screening
• Exchange Rates: Market rates may vary; consider using OTC for large amounts
• Processing Times: ACH deposits typically take 2-3 business days

Off-Ramp (Crypto to Fiat)

Off-ramping enables users to convert cryptocurrency back into fiat currency and withdraw to their bank account.

Overview

The off-ramp flow allows your users to:

• Deposit cryptocurrency from external wallets
• Exchange crypto for fiat currency
• Withdraw fiat to their bank account

Implementation Flow

1. Customer Verification: Ensure customer is onboarded and verified
2. Crypto Counterparty: Set up the user's external wallet as a counterparty
3. Crypto Deposit: Receive crypto from the user's external wallet
4. Currency Exchange: Exchange cryptocurrency for fiat
5. Bank Counterparty: Set up the user's bank account for withdrawal
6. Fiat Withdrawal: Send fiat to the user's bank account

Example Flow

// 1. User deposits crypto (receive deposit address)
GET /v1/accounts/acc_eth_123/deposit-address

// 2. After crypto arrives, exchange ETH for USD
POST /v1/exchanges
{
  "source_account_id": "acc_eth_123",
  "destination_account_id": "acc_usd_456",
  "action": "FIX_SOURCE",
  "amount": "0.5"
}

// 3. Withdraw USD to bank
POST /v1/withdrawals
{
  "counterparty_id": "cpty_bank_789",
  "account_id": "acc_usd_456",
  "amount": "1500.00",
  "purpose": "PERSONAL_ACCOUNT"
}

Key Considerations

• Blockchain Confirmations: Crypto deposits require network confirmations
• Exchange Slippage: Large exchanges may experience price movement
• RFI Requirements: Large withdrawals may trigger documentation requests
• Withdrawal Limits: Daily/monthly limits may apply based on verification level

Wallet as a Service

Build a multi-currency wallet for your users with Bultra handling the infrastructure, compliance, and custody.

Overview

Wallet as a Service enables you to:

• Offer multi-currency accounts (fiat and crypto) to your users
• Leverage Bultra's compliance infrastructure (KYC/AML)
• Enable peer-to-peer transfers between your users
• Integrate with external payment rails for deposits and withdrawals

Architecture

Your application acts as the front-end while Bultra provides:

• Account Management: Multi-currency accounts with real-time balances
• Transaction Processing: Deposits, withdrawals, transfers, and exchanges
• Compliance: KYC/KYB verification and ongoing AML monitoring
• Custody: Secure storage for fiat and crypto assets

Key Features

Webhook Integration

Subscribe to events to keep your application in sync:

• APPLICATION_STATUS_CHANGED - User verification updates
• PAYMENT_EXECUTED - Incoming deposits completed
• WITHDRAWAL_EXECUTED - Outgoing transfers completed
• TRANSFER_EXECUTED - Internal transfers completed
• EXCHANGE_EXECUTED - Currency exchanges completed

B2B Payments

Enable business-to-business payments with support for multiple currencies and payment rails.

Overview

B2B payment capabilities include:

• Send payments to suppliers and vendors
• Receive payments from business customers
• Multi-currency support with automatic FX
• Batch payment processing

Implementation Flow

1. Corporate Onboarding: Complete KYB for your business customers
2. Vendor Setup: Create counterparties for payment recipients
3. Payment Initiation: Create withdrawals to send payments
4. Collection Setup: Create payments to receive from customers
5. Reconciliation: Use transaction history and webhooks for tracking

Supported Payment Rails

Best Practices

• Use Idempotency: Always include idempotency keys for payment requests
• Implement Webhooks: Don't poll for status—use event notifications
• Handle RFIs Promptly: Respond to information requests quickly to avoid delays
• Validate Counterparties: Verify bank details before large payments