[ 'ContractPair' => '合约', ], 'fields' => [ 'symbol' => 'symbol', 'contract_coin_id' => '合约币种ID', 'contract_coin_name' => '合约币种名称', 'type' => '结算货币', 'unit_amount' => '单张面值（USDT）', 'maker_fee_rate' => 'Maker手续费率', 'taker_fee_rate' => 'Taker手续费率', 'status' => '状态', 'trade_status' => '交易状态', 'lever_rage' => '杠杆倍数', 'default_lever' => '默认杠杆', 'min_qty' => '单笔最小下单（张）', 'max_qty' => '单笔最大下单（张）', 'total_max_qty' => '最大持仓量（张）', 'buy_spread' => '买单滑点', 'sell_spread' => '卖单滑点', 'settle_spread' => '结算滑点', 'symbol' => '币种' ], 'options' => [], ];