post https://api.stake.fish/api/v1/chains/cardano/transactions/prepare/withdraw
Prepare an unsigned transaction to claim accumulated rewards while staying delegated.
Important Notes: • Claims ALL available rewards only (partial withdrawal not supported) • Stake remains registered and delegated, continues earning rewards • Must have withdrawable rewards > 0 • Must have sufficient ADA for fees in payment address • Requires DRep delegation before withdrawal (Conway era requirement)