interface SignAndSendTransactionPayload {
  readonly instructions: TransactionInstruction[];
  readonly transactionOptions: {
    readonly feeToken?: string;
    readonly addressLookupTableAccounts?: AddressLookupTableAccount[];
    readonly computeUnitLimit?: number;
    readonly clusterSimulation: 'devnet' | 'mainnet';
  };
}

interface WalletInfo {
  readonly credentialId: string;      // Unique WebAuthn credential ID (Base64). Used for authentication.
  readonly passkeyPubkey: number[];   // Raw public key bytes of the passkey.
  readonly smartWallet: string;       // **YOUR SOLANA WALLET ADDRESS** (Base58). Use this to receive funds.
  readonly walletDevice: string;      // Internal PDA for device management.
  readonly platform: string;          // Origin platform ('android' | 'ios').
}

interface SignOptions {
  redirectUrl: string;
  onSuccess?: (result: any) => void;
  onFail?: (error: Error) => void;
}