Users

const user = await cesto.users.lookup({ wallet: 'SOLANA_ADDRESS' });

user.exists;           // true when the wallet resolves to a Cesto user
user.delegatedSigning; // true when Cesto can sign on their behalf
user.migrationStatus;  // 'NOT_REQUIRED' | 'REQUIRED' | 'IN_PROGRESS' | 'COMPLETED' | null
user.provider;         // 'EXTERNAL' | 'PRIVY' | 'PARA' | null

if (await cesto.users.exists({ wallet })) { /* … */ }

const { exists, delegatedSigning } = await cesto.users.lookup({ wallet });

if (exists && delegatedSigning) {
  // Existing Cesto user: createChallenge → user signs the message → start
} else {
  // The wallet signs its own transactions: prepare → sign → submit
}