### Step 4: SDK Configuration Parameters
**Required Parameters:**
- `clientId` - Your merchant client identifier
- `env` - Environment (`dev`, `staging`, or `prod`)
- `authenticationToken` - The public token obtained from Step 2

**Optional Parameters:**
- `baseCurrency` - Source currency code or currency reference (default: based on merchant config)
- `targetCurrency` - Target cryptocurrency code or currency reference (default: based on merchant config)
- `baseAmount` - Amount in base currency
- `targetAmount` - Amount in target currency
- `paymentMethod` - Payment method identifier (e.g., `interac`, `paypal`)
- `walletAddress` - Cryptocurrency wallet address