Implement webauthn wallet

[ahnafalfariza]

Pre-flight checklist

• I have read the Contributing Guidelines on pull requests.
• Commit messages follow the conventional commits spec
• If this is a code change: I have written unit tests.
• If this changes code in a published package: I have run pnpm changeset to create a changeset JSON document appropriate for this change.
• If this is a new API or substantial change: the PR has an accompanying issue (closes #0000) and the maintainers have approved on my working plan.

Motivation

This pull request introduces the new @near-wallet-selector/webauthn-wallet package, enabling biometric authentication (WebAuthn) as a wallet option for NEAR Wallet Selector

Passkey Creation & Key Derivation

• When a user signs in for the first time, the wallet creates a WebAuthn credential (passkey) using the browser's navigator.credentials.create() API
• The passkey is stored securely in the device's Trusted Platform Module (TPM) or secure enclave
• A deterministic NEAR Ed25519 keypair is derived from the passkey's credential ID using SHA-256 hashing
• This ensures the same passkey always generates the same NEAR keypair, enabling consistent account access

Account Creation Flow

1. User enters a desired NEAR account ID
2. System checks if the account exists on-chain
3. If new account:
   • Creates a passkey via biometric authentication (fingerprint, face, PIN)
   • Derives NEAR keypair from the passkey's credential ID
   • Calls the configured relayer service to create the NEAR account with the derived public key
4. If existing account:
   • Authenticates with existing passkey
   • Verifies the derived public key matches an access key on the account

Authentication & Transaction Signing

• Sign In: Uses navigator.credentials.get() to authenticate with the stored passkey
• Transaction Signing:
  • Displays transaction details in a modal for user review
  • Prompts for biometric authentication to access the private key
  • Signs transactions using the NEAR keypair derived from the passkey
  • Supports single transactions, batch transactions, message signing, and delegate actions

Storage & Session Management

• Only stores public keys and account metadata in browser storage
• Private keys never leave the secure hardware - they're re-derived from passkeys on each use
• Maintains a list of previously used accounts for easy re-authentication
• Supports multiple accounts per device

[changeset-bot]

🦋 Changeset detected

Latest commit: e545885

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 30 packages

Name	Type
@near-wallet-selector/webauthn-wallet	Minor
@near-wallet-selector/arepa-wallet	Minor
@near-wallet-selector/bitget-wallet	Minor
@near-wallet-selector/bitte-wallet	Minor
@near-wallet-selector/coin98-wallet	Minor
@near-wallet-selector/core	Minor
@near-wallet-selector/ethereum-wallets	Minor
@near-wallet-selector/here-wallet	Minor
@near-wallet-selector/hot-wallet	Minor
@near-wallet-selector/intear-wallet	Minor
@near-wallet-selector/ledger	Minor
@near-wallet-selector/math-wallet	Minor
@near-wallet-selector/meteor-wallet-app	Minor
@near-wallet-selector/meteor-wallet	Minor
@near-wallet-selector/modal-ui-js	Minor
@near-wallet-selector/modal-ui	Minor
@near-wallet-selector/my-near-wallet	Minor
@near-wallet-selector/narwallets	Minor
@near-wallet-selector/near-mobile-wallet	Minor
@near-wallet-selector/near-snap	Minor
@near-wallet-selector/nightly	Minor
@near-wallet-selector/okx-wallet	Minor
@near-wallet-selector/ramper-wallet	Minor
@near-wallet-selector/react-hook	Minor
@near-wallet-selector/sender	Minor
@near-wallet-selector/unity-wallet	Minor
@near-wallet-selector/wallet-connect	Minor
@near-wallet-selector/wallet-utils	Minor
@near-wallet-selector/welldone-wallet	Minor
@near-wallet-selector/xdefi	Minor

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