About

This is a light-weight js lib that aims to make chip signatures for the PBT flow as seamless as possible.

The repo for the smart contracts can be found here.

Getting started

yarn add pbt-chip-client

After installing, you can import the relevant chip manufacturer’s helpers. Currently, the only chip manufacturer supported in the repo is Kongiscash (docs).

React example:

import { getPublicKeysFromScan, getSignatureFromScan } from 'pbt-chip-client/kong';

const MyComponent = () => {
  const [keys, setKeys] = useState(null);

  return (
    <>
      <button
        onClick={() => {
          getPublicKeysFromScan().then((keys) => {
            setKeys(keys);
          });
        }}
      >
        Click Me To Initiate Scan
      </button>
      <button
        onClick={() => {
          getSignatureFromScan({
            chipPublicKey: keys.primaryPublicKeyRaw,
            address: '<user_eth_address>',
            hash: '<blockhash>',
          }).then((sig) => {
            setSig(sig);
          });
        }}
      >
        Click Me To Sign EOA+blockhash w/ Chip
      </button>
    </>
  );
}

Documentation

This package exposes two functions for each chip manufacturer:

getPublicKeysFromScan

This function takes in a single object as the argument with the following parameters:

Parameter	Type	Description	Required
rpId	string	string representing the domain the scan is being called on. For example a workflow hosted on azuki.com would pass in azuki.com. Defaults to URL.hostname	No

Return value

Promise<{
  primaryPublicKeyHash: string;
  primaryPublicKeyRaw: string;
  secondaryPublicKeyHash: string;
  secondaryPublicKeyRaw: string;
  tertiaryPublicKeyHash: string;
  tertiaryPublicKeyRaw: string;
} | undefined>

getSignatureFromScan

This function takes in a single object as the argument with the following parameters:

Parameter	Type	Description	Required
rpId	string	string representing the domain the scan is being called on. For example a workflow hosted on azuki.com would pass in azuki.com. Defaults to URL.hostname	No
chipPublicKey	string	the public key for the chip. See getPublicKeysFromScan for how to grab	yes
address	string	the address for the wallet that will be minting the PBT	yes
hash	string	a recent blockhash. The PBT contract should be verifying that the blockhash signed is from a recent time window	yes

Return value

Promise<string | undefined>

parseKeys

This function takes a single positional argument:

Parameter	Type	Description	Required
payload	string	A hex representation of the signature read from scan	Yes

Return value

{
  primaryPublicKeyHash: string;
  primaryPublicKeyRaw: string;
  secondaryPublicKeyHash: string;
  secondaryPublicKeyRaw: string;
  tertiaryPublicKeyHash: string;
  tertiaryPublicKeyRaw: string;
} | undefined

Requirements

• The library must be hosted with secure transport (SSL), even in a development environment.

Current known limitations

• Scanning only works on mobile devices (powered by WebAuthn). This is supported on major browsers (Chrome, Safari, Firefox) but not yet on wallet browsers (like Metamask browser).
• A small handful of Android devices may have trouble completing the PBT scanning process. We are currently investigating a solution with using WebNFC for Android devices.
  • TODO: change implementation to use libhalo under the hood, as it has Android support

Disclaimer

Chiru Labs is not liable for any outcomes as a result of using this repo.

Contributing

Contributions are what make the open source community such an amazing place to learn, inspire, and create. Any contributions you make are greatly appreciated.

If you have a suggestion that would make this better, please fork the repo and create a pull request. You can also simply open an issue with the tag "enhancement".

Don't forget to give the project a star! Thanks again!

1. Fork the project
2. Create your feature branch (git checkout -b feature/AmazingFeature)
3. Commit your changes (git commit -m 'Add some AmazingFeature')
4. Push to the branch (git push origin feature/AmazingFeature)
5. Open a pull request

License

Distributed under the MIT License.