Get Proof-of-Transfer details

{
  "contract_id": "string",
  "first_burnchain_block_height": 0,
  "current_burnchain_block_height": 0,
  "pox_activation_threshold_ustx": 0,
  "rejection_fraction": 0,
  "reward_phase_block_length": 0,
  "prepare_phase_block_length": 0,
  "reward_slots": 0,
  "total_liquid_supply_ustx": 0,
  "reward_cycle_length": 0,
  "current_cycle": {
    "id": 0,
    "min_threshold_ustx": 0,
    "stacked_ustx": 0,
    "is_pox_active": true
  },
  "next_cycle": {
    "id": 0,
    "min_threshold_ustx": 0,
    "stacked_ustx": 0,
    "min_increment_ustx": 0,
    "prepare_phase_start_block_height": 0,
    "blocks_until_prepare_phase": 0,
    "reward_phase_start_block_height": 0,
    "blocks_until_reward_phase": 0,
    "ustx_until_pox_rejection": 0
  },
  "reward_cycle_id": 0,
  "min_amount_ustx": 0,
  "prepare_cycle_length": 0,
  "rejection_votes_left_required": 0,
  "contract_versions": [
    {
      "contract_id": "string",
      "activation_burnchain_block_height": 0,
      "first_reward_cycle_id": 0
    }
  ]
}