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Client SDK reference

Initialization

Add the following script tags to all pages where you need to call the Pi Apps SDK:

<script src="https://sdk.minepi.com/pi-sdk.js"></script>
<script>Pi.init({ version: "2.0" })</script>

The config object passed to the init function accepts the following keys:

  • version (string, required) - this is required to ensure compatibility of your app with newer SDK versions that might bring breaking changes (in which case breaking changes will be implemented under a higher version number)
  • sandbox: (boolean, optional) - this enables you to configure the SDK to run in the sandbox.

Using the SDK in sandbox mode:

<script src="https://sdk.minepi.com/pi-sdk.js"></script>
<script>Pi.init({ version: "2.0", sandbox: true })</script>

You may now run your app in the sandbox environment (https://sandbox.minepi.com), provided you've configured a development URL in the developer portal. Visit the developer portal by opening develop.pi in the Pi Browser to configure this and view your Sandbox URL.

Typically, if you're using a framework or a boilerplate that supports it, you should be able to set up your sandbox flag to match your development environment. For example, most good Node boilerplates will set up the value of process.env.NODE_ENV to either "development" or "production", and you could do something like: Pi.init({ version: "2.0", sandbox: <%= process.env.NODE_ENV !== 'production' %> }). This depends on your setup, but running the Pi SDK in sandbox mode will generally happen whenever your app is running in development.

Authentication

Warning: The user information obtained with this method should not be passed to your backend and should only be used for presentation logic (e.g displaying the user’s username). On your backend, use the Platform API as the source of truth. You can verify the user's identity by requesting the /me endpoint from your backend, using the access token obtained with this method.

Pi.authenticate(scopes: Array<Scope>, onIncompletePaymentFound: Function<PaymentDTO>): Promise<AuthResult>

Return value:

type AuthResult = {
  accessToken: string,
  user: {
    uid: string,
    username: string
  }
}

scopes

Available scopes: username, payments, wallet_address

Here is a breakdown of various keys available on the AuthResult['user'] object, and the scopes required for those keys to be present:

Field Description Required Scope
uid An app-local identifier for the user. This is specific to this user, and this app. It will change if the user revokes the permissions they granted to your app. (none)
username The user's Pi username. username
payments Required if your app needs to make payments between your app and the users payments
wallet_address The wallet address of the user who authenticates on your app. wallet_address

onIncompletePaymentFound

Signature: (payment: PaymentDTO) => void

Every time when the user is authenticated, and when they try to start a new payment flow, the SDK checks that there is no incomplete payment for this user. An incomplete payment, in this context, is a payment which has been submitted to the Pi Blockchain, but where status.developer_completed is still false (i.e. the developer has not called the /complete endpoint on this payment).

If an incomplete payment is found, this callback will be invoked with the payment's PaymentDTO.

When this callback is invoked, it is your responsibility to complete the corresponding payment (you should most likely send the payment DTO to your server, and process it according to your business logic). You'll need to do so before you can request a new payment from the user.

Payments

Create a new payment:

type PaymentData = {
  amount: number,
  memo: string,
  metadata: Object,
};

type PaymentCallbacks = {
  onReadyForServerApproval: (paymentId: string) => void,
  onReadyForServerCompletion: (paymentId: string, txid: string) => void,
  onCancel: (paymentId: string) => void,
  onError: (error: Error, payment?: PaymentDTO) => void,
};

Pi.createPayment(paymentData: PaymentData, callbacks: PaymentCallbacks): void;

The createPayment method takes two argument: paymentData and callbacks.

It will immediately start the payment flow, which will open on top of your app, enabling the user to review the payment and submit the blockchain transaction, or reject it.

Warning: concurrent payments:

When creating a new payment, if there is already an open payment with your app for the current user:

  • If the user has not yet made the blockchain transaction, the open payment will be cancelled.
  • If the user has already made the blockchain transaction, the new payment will be rejected (onError will be called) and the onIncompletePaymentFound callback that was passed to the authenticate method will be called with the existing payment (use this callback to resolve the situation, e.g by sending the previous payment to your server for server-side completion).

paymentData keys:

amount

This is the amount that the user is requested to pay to your app.

Example: 3.1415.

memo

A memo for this payment. This will be visible to the user in the payment confirmation page. Use this to briefly explain what the user is paying for.

Example: Digital kitten #1234.

metadata

An arbitrary Javascript object that you can attach to this payment. This is for your own use. You should use this object as a way to link this payment with your internal business logic.

Example: { orderId: 1234, itemIds: [11, 42, 314] }

callbacks keys:

onReadyForServerApproval

Signature: (paymentId: string) => void

This is called when the payment identifier (paymentId) is obtained from Pi Servers. During the approval time period, this callback will be invoked multiple times in case of failure. If the initial trial fails, the Pi SDK will continue to invoke the function roughly every 10 seconds until the approval timer ends.

Use this callback to send the paymentId to your backend for Server-Side Approval. Read more about Server-Side Approval and the full payment flow in the dedicated Payments page.

onReadyForServerCompletion

Signature: (paymentId: string, txid: string) => void

This is called when the user has submitted the transaction to the Pi Blockchain. During the completion time period, this callback will be invoked multiple times in case of failure. If the initial trial fails, the Pi SDK will continue to invoke the function roughly every 10 seconds until the completion timer ends.

Use this callback to send the blockchain transaction identifier (txid), along with the paymentId to your backend for Server-Side Completion. Read more about Server-Side Completion and the full payment flow in the dedicated Payments page.

onCancel

Signature: (paymentId: string) => void

This is called when the payment is cancelled (by a user action, or programmatically).

The payment may be cancelled either because the user manually rejected it, or because of some other blocking situation: the user doesn't have enough funds on their account to make the payment, another payment has been created concurrently...

onError

Signature: (error: Error, payment?: PaymentDTO) => void

This is called when an error occurs and the payment cannot be made. If the payment has been created, the second argument will be present and you may use it to investigate the error. Otherwise, only the first argument will be provided.

Type PaymentDTO

This type is for the arguments that are passed to onIncompletePaymentFound and onError.

type PaymentDTO = {
  // Payment data:
  identifier: string, // payment identifier
  user_uid: string, // user's app-specific ID
  amount: number, // payment amount
  memo: string, // a string provided by the developer, shown to the user
  metadata: Object, // an object provided by the developer for their own usage
  from_address: string, // sender address of the blockchain transaction
  to_address: string, // recipient address of the blockchain transaction
  direction: Direction, // direction of the payment
  created_at: string, // payment's creation timestamp
  network: AppNetwork, // a network of the payment
  
  // Status flags representing the current state of this payment
  status: {
    developer_approved: boolean, // Server-Side Approval
    transaction_verified: boolean, // blockchain transaction verified
    developer_completed: boolean, // server-Side Completion
    cancelled: boolean, // cancelled by the developer or by Pi Network
    user_cancelled: boolean, // cancelled by the user
  },
  
  // Blockchain transaction data:
  transaction: null | { // This is null if no transaction has been made yet
    txid: string, // id of the blockchain transaction
    verified: boolean, // true if the transaction matches the payment, false otherwise
    _link: string, // a link to the operation on the Blockchain API
  },
}

Type Direction

A developer can check the direction of the payment with this type.

type Direction = "user_to_app" | "app_to_user"

Type AppNetwork

Shows which network the payment is being made on.

type AppNetwork = "Pi Network" | "Pi Testnet"

Type Scope

Scopes you can request to users.

type Scope = "username" | "payments" | "wallet_address"

Share dialog

Open a native share dialog:

Pi.openShareDialog(title: string, message: string): void;

Use this method to open a native Share dialog (provided by the phone's OS), enabling your users to share content from your app with their friends.

  • title: the title of the message being shared
  • message: the message that will be sent when the user picks a target app in the Share flow