Kotlin

import com.dodopayments.api.client.DodoPaymentsClient
import com.dodopayments.api.client.okhttp.DodoPaymentsOkHttpClient
import com.dodopayments.api.models.checkoutsessions.CheckoutSessionRequest
import com.dodopayments.api.models.checkoutsessions.CheckoutSessionResponse
import com.dodopayments.api.models.checkoutsessions.ProductItemReq

// Configure using environment variables (DODO_PAYMENTS_API_KEY, DODO_PAYMENTS_WEBHOOK_KEY, DODO_PAYMENTS_BASE_URL)
// Or system properties (dodopayments.apiKey, dodopayments.webhookKey, dodopayments.baseUrl)
val client: DodoPaymentsClient = DodoPaymentsOkHttpClient.fromEnv()

val params: CheckoutSessionRequest = CheckoutSessionRequest.builder()
    .addProductCart(ProductItemReq.builder()
        .productId("pdt_123")
        .quantity(1)
        .build())
    .build()
    
val checkoutSessionResponse: CheckoutSessionResponse = client.checkoutSessions().create(params)
println(checkoutSessionResponse.sessionId())

val client: DodoPaymentsClient = DodoPaymentsOkHttpClient.fromEnv()

import java.time.Duration

val client = DodoPaymentsOkHttpClient.builder()
    .bearerToken("your_api_key_here")
    .baseUrl("https://live.dodopayments.com")
    .maxRetries(3)
    .timeout(Duration.ofSeconds(30))
    .build()

val testClient = DodoPaymentsOkHttpClient.builder()
    .fromEnv()
    .testMode()
    .build()

import com.dodopayments.api.core.RequestOptions
import java.time.Duration

// Global configuration
val client = DodoPaymentsOkHttpClient.builder()
    .fromEnv()
    .timeout(Duration.ofSeconds(45))
    .maxRetries(3)
    .build()

// Per-request timeout override
val product = client.products().retrieve(
    "pdt_123",
    RequestOptions.builder()
        .timeout(Duration.ofSeconds(10))
        .build()
)

val params = CheckoutSessionRequest.builder()
    .addProductCart(ProductItemReq.builder()
        .productId("pdt_123")
        .quantity(1)
        .build())
    .returnUrl("https://yourdomain.com/return")
    .build()

val session = client.checkoutSessions().create(params)
println("Checkout URL: ${session.checkoutUrl()}")

import com.dodopayments.api.models.products.Price
import com.dodopayments.api.models.products.Product
import com.dodopayments.api.models.products.ProductCreateParams
import com.dodopayments.api.models.misc.Currency
import com.dodopayments.api.models.misc.TaxCategory
import com.dodopayments.api.models.subscriptions.TimeInterval

val createParams = ProductCreateParams.builder()
    .name("Premium Subscription")
    .description("Monthly subscription with all features")
    .price(
        Price.RecurringPrice.builder()
            .currency(Currency.USD)
            .price(2999) // $29.99 in cents
            .discountBps(0)
            .purchasingPowerParity(false)
            .paymentFrequencyCount(1)
            .paymentFrequencyInterval(TimeInterval.MONTH)
            .subscriptionPeriodCount(1)
            .subscriptionPeriodInterval(TimeInterval.MONTH)
            .build()
    )
    .taxCategory(TaxCategory.DIGITAL_PRODUCTS)
    .build()

val product: Product = client.products().create(createParams)
println("Created product ID: ${product.productId()}")

import com.dodopayments.api.errors.UnprocessableEntityException
import com.dodopayments.api.models.licenses.LicenseActivateParams
import com.dodopayments.api.models.licenses.LicenseActivateResponse

val activateParams = LicenseActivateParams.builder()
    .licenseKey("XXXX-XXXX-XXXX-XXXX")
    .name("user-laptop-01")
    .build()

try {
    val activationResult: LicenseActivateResponse = client.licenses()
        .activate(activateParams)

    println("License activated successfully")
    println("Instance ID: ${activationResult.id()}")
    println("License key ID: ${activationResult.licenseKeyId()}")
} catch (e: UnprocessableEntityException) {
    println("License activation failed: ${e.message}")
}

import com.dodopayments.api.models.payments.AttachExistingCustomer
import com.dodopayments.api.models.payments.BillingAddress
import com.dodopayments.api.models.misc.CountryCode
import com.dodopayments.api.models.subscriptions.SubscriptionChargeParams
import com.dodopayments.api.models.subscriptions.SubscriptionCreateParams

// Create a subscription
val subscriptionParams = SubscriptionCreateParams.builder()
    .billing(BillingAddress.builder()
        .city("San Francisco")
        .country(CountryCode.US)
        .state("CA")
        .street("1 Market St")
        .zipcode("94105")
        .build())
    .customer(AttachExistingCustomer.builder()
        .customerId("cus_123")
        .build())
    .productId("pdt_456")
    .quantity(1)
    .build()

val subscription = client.subscriptions().create(subscriptionParams)
println("Subscription ID: ${subscription.subscriptionId()}")

// Charge an on-demand subscription
// productPrice is in the lowest currency denomination (e.g., 2500 = $25.00 USD)
val chargeParams = SubscriptionChargeParams.builder()
    .subscriptionId(subscription.subscriptionId())
    .productPrice(2500)
    .build()

val chargeResponse = client.subscriptions().charge(chargeParams)
println("Payment ID: ${chargeResponse.paymentId()}")

import com.dodopayments.api.models.usageevents.EventInput
import com.dodopayments.api.models.usageevents.UsageEventIngestParams

val usageParams = UsageEventIngestParams.builder()
    .addEvent(EventInput.builder()
        .customerId("cus_456")
        .eventId("event_123")
        .eventName("api_call")
        .build())
    .build()

client.usageEvents().ingest(usageParams)
println("Usage event recorded")

import com.dodopayments.api.client.DodoPaymentsClientAsync
import com.dodopayments.api.client.okhttp.DodoPaymentsOkHttpClientAsync
import kotlinx.coroutines.runBlocking

val asyncClient: DodoPaymentsClientAsync = DodoPaymentsOkHttpClientAsync.fromEnv()

runBlocking {
    val customer = asyncClient.customers().retrieve("cus_123")
    println("Customer email: ${customer.email()}")
}

import com.dodopayments.api.errors.*

try {
    // Note: POST /payments is deprecated — prefer checkout sessions for new
    // integrations. Shown here only to illustrate error handling.
    // paymentParams is a PaymentCreateParams with billing, customer, and productCart.
    val payment = client.payments().create(paymentParams)
    println("Success: ${payment.paymentId()}")
} catch (e: UnauthorizedException) {
    println("Authentication failed: ${e.message}")
} catch (e: BadRequestException) {
    println("Invalid request: ${e.message}")
    println("Response body: ${e.body()}")
} catch (e: RateLimitException) {
    println("Rate limit exceeded, retry after: ${e.headers().values("retry-after")}")
} catch (e: DodoPaymentsServiceException) {
    println("API error: ${e.statusCode()} - ${e.message}")
}

import com.dodopayments.api.client.DodoPaymentsClient
import com.dodopayments.api.models.payments.PaymentCreateResponse

fun safeCreatePayment(client: DodoPaymentsClient): Result<PaymentCreateResponse> = runCatching {
    // Note: POST /payments is deprecated — prefer checkout sessions for new integrations
    // paymentParams is a PaymentCreateParams with billing, customer, and productCart.
    client.payments().create(paymentParams)
}

// Usage
safeCreatePayment(client)
    .onSuccess { payment -> println("Created: ${payment.paymentId()}") }
    .onFailure { error -> println("Error: ${error.message}") }

import androidx.lifecycle.ViewModel
import androidx.lifecycle.viewModelScope
import kotlinx.coroutines.launch

class PaymentViewModel(private val api: YourBackendApi) : ViewModel() {
    fun createCheckout(productId: String) {
        viewModelScope.launch {
            // Your backend creates the session with the Kotlin SDK and returns checkout_url.
            // YourBackendApi and openCheckout are your app's own code; openCheckout
            // passes the URL to DodoCheckout from the Android SDK.
            val checkoutUrl = api.createCheckoutSession(productId).checkoutUrl
            openCheckout(checkoutUrl)
        }
    }
}

import com.dodopayments.api.core.RequestOptions

// Per-request validation
val product = client.products().retrieve(
    "pdt_123",
    RequestOptions.builder()
        .responseValidation(true)
        .build()
)

// Or validate explicitly
val validatedProduct = product.validate()

import java.net.InetSocketAddress
import java.net.Proxy

val client = DodoPaymentsOkHttpClient.builder()
    .fromEnv()
    .proxy(
        Proxy(
            Proxy.Type.HTTP,
            InetSocketAddress("proxy.example.com", 8080)
        )
    )
    .build()

val customClient = client.withOptions {
    it.baseUrl("https://example.com")
    it.maxRetries(5)
}

import com.dodopayments.api.client.okhttp.DodoPaymentsOkHttpClient
import com.dodopayments.api.errors.DodoPaymentsServiceException
import com.dodopayments.api.models.checkoutsessions.CheckoutSessionRequest
import com.dodopayments.api.models.checkoutsessions.ProductItemReq
import io.ktor.http.HttpStatusCode
import io.ktor.server.application.*
import io.ktor.server.request.*
import io.ktor.server.response.*
import io.ktor.server.routing.*

fun Application.configureRouting() {
    val client = DodoPaymentsOkHttpClient.builder()
        .bearerToken(environment.config.property("dodo.apiKey").getString())
        .build()
    
    routing {
        post("/create-checkout") {
            try {
                // CheckoutRequest is your own @Serializable request class with a productId field
                val request = call.receive<CheckoutRequest>()
                val params = CheckoutSessionRequest.builder()
                    .addProductCart(ProductItemReq.builder().productId(request.productId).quantity(1).build())
                    .build()
                val session = client.checkoutSessions().create(params)
                call.respond(mapOf("checkout_url" to session.checkoutUrl()))
            } catch (e: DodoPaymentsServiceException) {
                call.respond(HttpStatusCode.BadRequest, mapOf("error" to e.message))
            }
        }
    }
}