Crate pallet_passkey

Using Passkeys to execute transactions

Quick Links

• Configuration: Config
• Extrinsics: Call
• Event Enum: Event
• Error Enum: Error

Passkey Pallet

Provides a way to execute transactions using passkey signatures.

Summary

Passkeys are a secure alternative to passwords for authentication. Due to its ease of use for the users and having a well established support in different platforms, Frequency chain supports passkey p256 signatures for select transactions. With this feature users would be able to execute a transactions by authenticating themselves with a Passkey P256 signature.

Actions

The Passkey pallet provides for:

• Executing supported transactions with a valid Passkey P256 signature

Interactions

Extrinsic verification

Because the Polkadot SDK currently lacks support for P256 signatures, we had to use an unsigned extrinsic to allow this custom verification before dispatching transactions. To achieve this, we added P256 signature verification within the ValidateUnsigned trait implementation for the pallet.

Since unsigned extrinsics bypass verification by SignedExtensions, we’ve added the necessary checks within the ValidateUnsigned trait implementation to mitigate potential vulnerabilities.

Extrinsics

Name/Description	Caller	Payment	Key Events	Runtime Added
proxy Proxies an extrinsic call	Anyone	Tokens	TransactionExecutionSuccess	92

See Rust Docs for more details.

Re-exports

• pub use weights::*;
• pub use types::*;
• pub use module::*;

Modules

• module
  The pallet module in each FRAME pallet hosts the most important items needed to construct this pallet.
• types
  defines all new types for this pallet
• weights
  Autogenerated weights for pallet_passkey

Structs

• ChargeTransactionPayment
  Passkey related tx payment
• FrameSystemChecks
  Frame system related checks
• PasskeyWeightCheck
  Block resource (weight) limit check.