TapDano

TapDano is an npm package designed for both web and mobile (Ionic/Cordova) environments, enabling interaction with smartcards that utilize the TapDano firmware.

The firmware (JavaCard Applet) can be found at TapDano Applet.

This package supports multiple communication methods, including WebNFC for Android devices and WebAuthn for iOS and desktop environments with NFC USB readers.

Installation

To install the TapDano package, use npm:

npm i tapdano

Usage

Here's a basic example of how to use the TapDano package:

import { TapDanoService } from 'tapdano';

const tapDanoService = new TapDanoService();

const tag = await tapDanoService.readTag();

Available Methods

constructor(config?: TapDanoServiceConfig)

• Parameters:
  • config.method (optional): Specify the communication method. Accepts 'auto', 'WebNFC', or 'WebAuthn'.

readTag(): Promise<TagParser>

Reads data from the smartcard.

• Returns: Promise<TagParser>

burnTag(action: 'new' | 'restore', type: 'soulbound' | 'extractable', privateKey?: string): Promise<TagParser>

Burns a new Tag the smartcard.

• Parameters:
  • action: Specify the action, either 'new' or 'restore'.
  • type: Specify the type, either 'soulbound' or 'extractable'.
  • privateKey (optional): Provide a private key when restoring.
• Returns: Promise<TagParser>

signData(data: string): Promise<TagParser>

Signs data using the smartcard.

• Parameters:
  • data: Hexadecimal string of data to be signed.
• Returns: Promise<TagParser>

formatTag(): Promise<TagParser>

Reset the smartcard.

• Returns: Promise<TagParser>

lockTag(): Promise<TagParser>

Locks the smartcard. It is used to permanently lock the private key extraction from an "extractable" Tag.

• Returns: Promise<TagParser>

pinLock(pin: string): Promise<TagParser>

Temporarily locks the smartcard with a PIN.

• Parameters:
  • pin: A 4-character PIN string.
• Returns: Promise<TagParser>

pinUnlock(pin: string): Promise<TagParser>

Unlocks the smartcard using a PIN.

• Parameters:
  • pin: A 4-character PIN string.
• Returns: Promise<TagParser>

setPolicyId(policyId: string): Promise<TagParser>

Sets a policy ID on the smartcard. Used after minting a Soulbound NFT, to link the PolicyId to the Tag and facilitate loading the Asset when reading the smartcard.

• Parameters:
  • policyId: A 28-character hexadecimal string representing the policy ID.
• Returns: Promise<TagParser>

executeRawCommand(command?: string): Promise<TagParser>

Executes a raw APDU command on the smartcard.

• Parameters:
  • command (optional): The raw APDU command to be sent.
• Returns: Promise<TagParser>

cancel()

Cancels any ongoing operation on the smartcard.

License

This project is licensed under the MIT License - see the LICENSE file for details.