diff --git a/.gitleaks.toml b/.gitleaks.toml
new file mode 100644
index 0000000..09d74f8
--- /dev/null
+++ b/.gitleaks.toml
@@ -0,0 +1,14 @@
+title = "bybit-connector-ruby gitleaks configuration"
+
+[extend]
+useDefault = true
+
+[[rules]]
+id = "generic-api-key"
+
+[[rules.allowlists]]
+description = "Allow documented source commit SHAs in the changelog"
+condition = "AND"
+regexTarget = "line"
+regexes = ['''^\s*-\s+(OpenAPI|Docs):\s+`[0-9a-f]{40}`\s*$''']
+paths = ['''(^|/)CHANGELOG\.md$''']
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 94649e6..4c35a89 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,43 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.1.2] - 2026-10-13
+
+### Added
+- `AccountService#demo_apply_money(...)`
+- `AccountService#get_option_asset_info(...)`
+- `AccountService#get_pay_info(...)`
+- `AccountService#get_trade_info_for_analysis(...)`
+- `AssetService#limit_order_callback(...)`
+- `CryptoLoanService#get_fixed_available_inventory(...)`
+- `CryptoLoanService#get_fixed_repayment_history(...)`
+- `CryptoLoanService#supply_fixed(...)`
+- `CryptoLoanService#get_flexible_available_inventory(...)`
+- `EarnService#list_auto_savings(...)`
+- `EarnService#edit_earn_auto_savings(...)`
+- `MarketService#get_option_base_coins(...)`
+- `PositionService#get_symbol_info(...)`
+- `SpotMarginService#get_trade_coin_state(...)`
+- `SpotMarginService#query_fixed_available_inventory(...)`
+- `SpotMarginService#account_fixed_borrow(...)`
+- `SpotMarginService#query_fixed_borrow_contracts(...)`
+- `SpotMarginService#query_fixed_borrow_orders(...)`
+- `SpotMarginService#query_fixed_borrow_market(...)`
+- `SpotMarginService#renew_fixed_borrow(...)`
+- `SpotMarginService#get_trade_flexible_available_inventory(...)`
+- `SpotMarginService#get_trade_auto_repay_mode(...)`
+- `SpotMarginService#query_borrow_liability(...)`
+- `SpotMarginService#get_trade_max_borrowable(...)`
+- `SpotMarginService#get_trade_repayment_available_amount(...)`
+- `SpotMarginService#set_auto_repay_mode(...)`
+- `SpotMarginService#spot_margin_set_leverage(...)`
+- `SpotMarginService#get_trade_state(...)`
+- `SpotMarginService#spot_margin_switch_mode(...)`
+- `UserService#query_referral_code(...)`
+
+### Sources
+- OpenAPI: `08130d57323d390dea58f15418758e2667c74ce6`
+- Docs: `59e3d457dea6b419a14987c19a3aabf4ffb38238`
 
 ## [0.1.1] - 2026-07-22
 
diff --git a/lib/bybit/rest_api/account_service.rb b/lib/bybit/rest_api/account_service.rb
index 0aafc91..a0f0977 100644
--- a/lib/bybit/rest_api/account_service.rb
+++ b/lib/bybit/rest_api/account_service.rb
@@ -327,6 +327,56 @@ def upgrade_to_uta_pro(**kwargs)
         params = Bybit::Utils::WireKeys.camelize(params)
         @session.sign_request(method: :post, path: '/v5/account/upgrade-to-uta', body: params)
       end
+
+      # Apply demo funds
+      #
+      # POST /v5/account/demo-apply-money
+      #
+      # @option kwargs [Integer] :adjust_type Adjustment type, 0-add funds, 1-deduct funds
+      # @option kwargs [Array] :uta_demo_apply_money Fund application config list
+      # @note This endpoint requires `base_url: 'https://api-demo.bybit.com'`.
+      # @return [Hash] Bybit V5 ApiResponse envelope (retCode / retMsg / result / retExtInfo / time).
+      # @see https://bybit-exchange.github.io/docs/v5/demo
+      def demo_apply_money(**kwargs)
+        params = Bybit::Utils::WireKeys.camelize(kwargs)
+        @session.sign_request(method: :post, path: '/v5/account/demo-apply-money', body: params)
+      end
+
+      # Get Option Asset Info
+      #
+      # GET /v5/account/option-asset-info
+      #
+      # @return [Hash] Bybit V5 ApiResponse envelope (retCode / retMsg / result / retExtInfo / time).
+      # @see https://bybit-exchange.github.io/docs/v5/account/option-asset-info
+      def get_option_asset_info
+        @session.sign_request(method: :get, path: '/v5/account/option-asset-info')
+      end
+
+      # Get Pay Info
+      #
+      # GET /v5/account/pay-info
+      #
+      # @option kwargs [String] :coin Coin name, e.g. `USDT`, `BTC`. If not passed, returns all repayment info.
+      # @return [Hash] Bybit V5 ApiResponse envelope (retCode / retMsg / result / retExtInfo / time).
+      # @see https://bybit-exchange.github.io/docs/v5/account/pay-info
+      def get_pay_info(**kwargs)
+        params = Bybit::Utils::WireKeys.camelize(kwargs)
+        @session.sign_request(method: :get, path: '/v5/account/pay-info', params: params)
+      end
+
+      # Get Trade Info For Analysis
+      #
+      # GET /v5/account/trade-info-for-analysis
+      #
+      # @param symbol [String] Trading pair, e.g. `BTCUSDT`, `ETHUSDT`.
+      # @option kwargs [Integer] :start_time Query start time in milliseconds timestamp.
+      # @option kwargs [Integer] :end_time Query end time in milliseconds timestamp.
+      # @return [Hash] Bybit V5 ApiResponse envelope (retCode / retMsg / result / retExtInfo / time).
+      # @see https://bybit-exchange.github.io/docs/v5/account/trade-info-for-analysis
+      def get_trade_info_for_analysis(symbol:, **kwargs)
+        params = Bybit::Utils::WireKeys.camelize(kwargs.merge(symbol: symbol))
+        @session.sign_request(method: :get, path: '/v5/account/trade-info-for-analysis', params: params)
+      end
     end
   end
 end
diff --git a/lib/bybit/rest_api/asset_service.rb b/lib/bybit/rest_api/asset_service.rb
index 795a887..eb320d7 100644
--- a/lib/bybit/rest_api/asset_service.rb
+++ b/lib/bybit/rest_api/asset_service.rb
@@ -633,6 +633,23 @@ def small_asset_quote(**kwargs)
         params = Bybit::Utils::WireKeys.camelize(params)
         @session.sign_request(method: :post, path: '/v5/asset/covert/get-quote', body: params)
       end
+
+      # Limit order callback notification
+      #
+      # POST /v5/asset/exchange/limit-order/callback
+      #
+      # @param exchange_tx_id [String] Convert order number
+      # @param option_type [Integer] Callback type: 1=filled, 2=canceled, 3=failed
+      # @param time_stamp [Integer] Callback timestamp (milliseconds)
+      # @param sign [String] Callback signature data
+      # @param app_id [String] appId of callback business, currently only supports: TimeResearch
+      # @option kwargs [String] :error_code Error code on failure
+      # @note This endpoint is generated from the Bybit OpenAPI specification and is not in the public documentation.
+      # @return [Hash] Bybit V5 ApiResponse envelope (retCode / retMsg / result / retExtInfo / time).
+      def limit_order_callback(exchange_tx_id:, option_type:, time_stamp:, sign:, app_id:, **kwargs)
+        params = Bybit::Utils::WireKeys.camelize(kwargs.merge(exchangeTxId: exchange_tx_id, optionType: option_type, timeStamp: time_stamp, sign: sign, appId: app_id))
+        @session.sign_request(method: :post, path: '/v5/asset/exchange/limit-order/callback', body: params)
+      end
     end
   end
 end
diff --git a/lib/bybit/rest_api/crypto_loan_service.rb b/lib/bybit/rest_api/crypto_loan_service.rb
index 9d53aed..289eda1 100644
--- a/lib/bybit/rest_api/crypto_loan_service.rb
+++ b/lib/bybit/rest_api/crypto_loan_service.rb
@@ -370,6 +370,66 @@ def repay_flexible_with_collateral(loan_currency:, collateral_coin:, amount:, **
         params = Bybit::Utils::WireKeys.camelize(params)
         @session.sign_request(method: :post, path: '/v5/crypto-loan-flexible/repay-collateral', body: params)
       end
+
+      # Get Available Inventory
+      #
+      # GET /v5/crypto-loan-fixed/available-inventory
+      #
+      # @param currency [String] Coin name, uppercase only
+      # @param term [String] Fixed term 7: 7 days; 14: 14 days; 30: 30 days; 90: 90 days; 180: 180 days
+      # @param annual_rate [String] Customizable annual interest rate, e.g., 0.02 means 2%
+      # @return [Hash] Bybit V5 ApiResponse envelope (retCode / retMsg / result / retExtInfo / time).
+      # @see https://bybit-exchange.github.io/docs/v5/new-crypto-loan/fixed/available-inventory
+      def get_fixed_available_inventory(currency:, term:, annual_rate:)
+        params = Bybit::Utils::WireKeys.camelize({ currency: currency, term: term, annualRate: annual_rate })
+        @session.sign_request(method: :get, path: '/v5/crypto-loan-fixed/available-inventory', params: params)
+      end
+
+      # Get Repayment History
+      #
+      # GET /v5/crypto-loan-fixed/repayment-history
+      #
+      # @option kwargs [String] :repay_id Repayment ID
+      # @option kwargs [String] :loan_currency Loan currency filter
+      # @option kwargs [String] :limit Page size
+      # @option kwargs [String] :cursor Page cursor
+      # @return [Hash] Bybit V5 ApiResponse envelope (retCode / retMsg / result / retExtInfo / time).
+      # @see https://bybit-exchange.github.io/docs/v5/new-crypto-loan/fixed/repay-history
+      def get_fixed_repayment_history(**kwargs)
+        params = Bybit::Utils::WireKeys.camelize(kwargs)
+        @session.sign_request(method: :get, path: '/v5/crypto-loan-fixed/repayment-history', params: params)
+      end
+
+      # Create Supply Order
+      #
+      # POST /v5/crypto-loan-fixed/supply
+      #
+      # @param order_currency [String] Currency to lend
+      # @param order_amount [String] Amount to lend
+      # @param annual_rate [String] Annual interest rate
+      # @param term [String] Term in days (7, 14, 30, 90, 180)
+      # @option kwargs [String] :available_source Fund source for supply order:
+      #   - `0`: Funding account (default)
+      #   - `1`: Flexible savings
+      #   - `2`: Mixed (funding account + flexible savings)
+      # @return [Hash] Bybit V5 ApiResponse envelope (retCode / retMsg / result / retExtInfo / time).
+      # @see https://bybit-exchange.github.io/docs/v5/new-crypto-loan/fixed/supply
+      def supply_fixed(order_currency:, order_amount:, annual_rate:, term:, **kwargs)
+        params = Bybit::Utils::WireKeys.camelize(kwargs.merge(orderCurrency: order_currency, orderAmount: order_amount, annualRate: annual_rate, term: term))
+        @session.sign_request(method: :post, path: '/v5/crypto-loan-fixed/supply', body: params)
+      end
+
+      # Get Available Inventory
+      #
+      # GET /v5/crypto-loan-flexible/available-inventory
+      #
+      # @param currency [String] Coin name, uppercase only
+      # @return [Hash] Bybit V5 ApiResponse envelope (retCode / retMsg / result / retExtInfo / time).
+      # @see https://bybit-exchange.github.io/docs/v5/new-crypto-loan/flexible/available-inventory
+      def get_flexible_available_inventory(currency:)
+        params = Bybit::Utils::WireKeys.camelize({ currency: currency })
+        @session.sign_request(method: :get, path: '/v5/crypto-loan-flexible/available-inventory', params: params)
+      end
     end
   end
 end
diff --git a/lib/bybit/rest_api/earn_service.rb b/lib/bybit/rest_api/earn_service.rb
index 280020d..f30ed65 100644
--- a/lib/bybit/rest_api/earn_service.rb
+++ b/lib/bybit/rest_api/earn_service.rb
@@ -1042,6 +1042,37 @@ def set_fixed_term_auto_invest(product_id:, category:, position_id:, status:, **
         params = Bybit::Utils::WireKeys.camelize(params)
         @session.sign_request(method: :post, path: '/v5/earn/fixed-term/position/auto-invest', body: params)
       end
+
+      # Get Auto Savings Settings
+      #
+      # GET /v5/earn/flexible-saving/auto-savings
+      #
+      # @option kwargs [Array] :coins Coin names to query, for example `coins=BTC&coins=ETH`. Omit for all supported coins.
+      # @return [Hash] Bybit V5 ApiResponse envelope (retCode / retMsg / result / retExtInfo / time).
+      # @see https://bybit-exchange.github.io/docs/v5/finance/earn/flexible-saving/auto-savings
+      def list_auto_savings(**kwargs)
+        coins = kwargs[:coins]
+        if coins.is_a?(Array) && coins.length > 50
+          raise Bybit::ConfigurationError,
+                'coins supports at most 50 values'
+        end
+        params = Bybit::Utils::WireKeys.camelize(kwargs)
+        @session.sign_request(method: :get, path: '/v5/earn/flexible-saving/auto-savings', params: params)
+      end
+
+      # Edit Auto Savings Settings
+      #
+      # POST /v5/earn/flexible-saving/auto-savings
+      #
+      # @param is_selected [Boolean] Whether to enable auto savings
+      # @option kwargs [String] :coin Coin to change; omit or pass an empty string to change the global setting
+      # @option kwargs [Boolean] :purchase_immediately When enabling, asynchronously attempt to subscribe the available Funding Account balance; ignored when disabling
+      # @return [Hash] Bybit V5 ApiResponse envelope (retCode / retMsg / result / retExtInfo / time).
+      # @see https://bybit-exchange.github.io/docs/v5/finance/earn/flexible-saving/auto-savings
+      def edit_earn_auto_savings(is_selected:, **kwargs)
+        params = Bybit::Utils::WireKeys.camelize(kwargs.merge(isSelected: is_selected))
+        @session.sign_request(method: :post, path: '/v5/earn/flexible-saving/auto-savings', body: params)
+      end
     end
   end
 end
diff --git a/lib/bybit/rest_api/market_service.rb b/lib/bybit/rest_api/market_service.rb
index 32e3a22..8eadb9f 100644
--- a/lib/bybit/rest_api/market_service.rb
+++ b/lib/bybit/rest_api/market_service.rb
@@ -350,6 +350,23 @@ def get_tickers(category:, **kwargs)
         params = Bybit::Utils::WireKeys.camelize(params)
         @session.public_request(path: '/v5/market/tickers', params: params)
       end
+
+      # Get Option Base Coins
+      #
+      # GET /v5/market/option-base-coins
+      #
+      # @option kwargs [String] :underlying_type Underlying asset type. Supports comma-separated values, e.g. `0,2`.
+      #   - `0`: Crypto
+      #   - `1`: Commodity
+      #   - `2`: Stock
+      #   - `3`: Forex
+      #   - `4`: Oil
+      # @return [Hash] Bybit V5 ApiResponse envelope (retCode / retMsg / result / retExtInfo / time).
+      # @see https://bybit-exchange.github.io/docs/v5/market/option-base-coins
+      def get_option_base_coins(**kwargs)
+        params = Bybit::Utils::WireKeys.camelize(kwargs)
+        @session.public_request(path: '/v5/market/option-base-coins', params: params)
+      end
     end
   end
 end
diff --git a/lib/bybit/rest_api/position_service.rb b/lib/bybit/rest_api/position_service.rb
index d9c7dc9..ba46235 100644
--- a/lib/bybit/rest_api/position_service.rb
+++ b/lib/bybit/rest_api/position_service.rb
@@ -197,6 +197,21 @@ def switch_position_mode(category:, mode:, **kwargs)
         params = Bybit::Utils::WireKeys.camelize(params)
         @session.sign_request(method: :post, path: '/v5/position/switch-mode', body: params)
       end
+
+      # Get Futures Leverage
+      #
+      # GET /v5/position/symbol-info
+      #
+      # @param category [String] Product type:
+      #   - `linear`: USDT perpetual, USDC contract
+      #   - `inverse`: Inverse perpetual, Inverse futures
+      # @option kwargs [String] :symbol Symbol name, e.g. `BTCUSDT`, uppercase only
+      # @return [Hash] Bybit V5 ApiResponse envelope (retCode / retMsg / result / retExtInfo / time).
+      # @see https://bybit-exchange.github.io/docs/v5/position/batch-lvg
+      def get_symbol_info(category:, **kwargs)
+        params = Bybit::Utils::WireKeys.camelize(kwargs.merge(category: category))
+        @session.sign_request(method: :get, path: '/v5/position/symbol-info', params: params)
+      end
     end
   end
 end
diff --git a/lib/bybit/rest_api/spot_margin_service.rb b/lib/bybit/rest_api/spot_margin_service.rb
index ed74cf1..d6a967e 100644
--- a/lib/bybit/rest_api/spot_margin_service.rb
+++ b/lib/bybit/rest_api/spot_margin_service.rb
@@ -57,6 +57,237 @@ def get_vip_margin_data(**kwargs)
         params = Bybit::Utils::WireKeys.camelize(params)
         @session.public_request(path: '/v5/spot-margin-trade/data', params: params)
       end
+
+      # Get Spot Margin Coin State
+      #
+      # GET /v5/spot-margin-trade/coinstate
+      #
+      # @option kwargs [String] :currency Coin name, uppercase only. e.g. `BTC`. If not passed, returns all coin states.
+      # @return [Hash] Bybit V5 ApiResponse envelope (retCode / retMsg / result / retExtInfo / time).
+      # @see https://bybit-exchange.github.io/docs/v5/spot-margin-uta/coinstate
+      def get_trade_coin_state(**kwargs)
+        params = Bybit::Utils::WireKeys.camelize(kwargs)
+        @session.sign_request(method: :get, path: '/v5/spot-margin-trade/coinstate', params: params)
+      end
+
+      # Query Fixed-Rate Available Inventory
+      #
+      # GET /v5/spot-margin-trade/fixed-available-inventory
+      #
+      # @param currency [String] Borrow coin name, uppercase only. e.g. `USDT`, `BTC`. **Required.**
+      # @param term [String] Loan term in days. e.g. `7`, `14`, `30`, `90`, `180`. **Required.**
+      # @param annual_rate [String] Annual interest rate. e.g. `0.02` means 2%. **Required.**
+      # @return [Hash] Bybit V5 ApiResponse envelope (retCode / retMsg / result / retExtInfo / time).
+      # @see https://bybit-exchange.github.io/docs/v5/spot-margin-uta/fixed-available-inventory
+      def query_fixed_available_inventory(currency:, term:, annual_rate:)
+        params = Bybit::Utils::WireKeys.camelize({ currency: currency, term: term, annualRate: annual_rate })
+        @session.sign_request(method: :get, path: '/v5/spot-margin-trade/fixed-available-inventory', params: params)
+      end
+
+      # Fixed-Rate Borrow
+      #
+      # POST /v5/spot-margin-trade/fixedborrow
+      #
+      # @param order_currency [String] Borrow coin name, uppercase only. e.g. `USDT`, `BTC`.
+      # @param order_amount [String] Borrow amount.
+      # @param annual_rate [String] Annual interest rate. e.g. `0.02` means 2%.
+      # @param term [String] Loan term in days. Supported values: `7`, `14`, `30`, `90`, `180`.
+      # @option kwargs [String] :repay_type Maturity handling type.
+      #   - `1`: Auto-repay at maturity (default)
+      #   - `2`: Convert to flexible-rate (variable-rate) loan at maturity
+      # @option kwargs [String] :strategy_type Order strategy.
+      #   - `PARTIAL`: Partial fill or cancel (immediate-or-cancel)
+      #   - `FULL`: Fill or kill (all-or-nothing)
+      # @return [Hash] Bybit V5 ApiResponse envelope (retCode / retMsg / result / retExtInfo / time).
+      # @see https://bybit-exchange.github.io/docs/v5/spot-margin-uta/fixedborrow
+      def account_fixed_borrow(order_currency:, order_amount:, annual_rate:, term:, **kwargs)
+        params = Bybit::Utils::WireKeys.camelize(kwargs.merge(orderCurrency: order_currency, orderAmount: order_amount, annualRate: annual_rate, term: term))
+        @session.sign_request(method: :post, path: '/v5/spot-margin-trade/fixedborrow', body: params)
+      end
+
+      # Query Fixed-Rate Borrow Contracts
+      #
+      # GET /v5/spot-margin-trade/fixedborrow-contract-info
+      #
+      # @option kwargs [String] :order_id Filter by borrow order ID.
+      # @option kwargs [String] :order_currency Filter by borrow coin name, uppercase only. e.g. `USDT`.
+      # @option kwargs [String] :term Filter by loan term in days. e.g. `7`, `14`, `30`, `90`, `180`.
+      # @option kwargs [String] :limit Page size. Range: [1, 100]. Default: `10`.
+      # @option kwargs [String] :cursor Cursor for pagination. Use `nextPageCursor` from previous response.
+      # @return [Hash] Bybit V5 ApiResponse envelope (retCode / retMsg / result / retExtInfo / time).
+      # @see https://bybit-exchange.github.io/docs/v5/spot-margin-uta/fixedborrow-contract-info
+      def query_fixed_borrow_contracts(**kwargs)
+        params = Bybit::Utils::WireKeys.camelize(kwargs)
+        @session.sign_request(method: :get, path: '/v5/spot-margin-trade/fixedborrow-contract-info', params: params)
+      end
+
+      # Query Fixed-Rate Borrow Orders
+      #
+      # GET /v5/spot-margin-trade/fixedborrow-order-info
+      #
+      # @option kwargs [String] :order_id Filter by borrow order ID.
+      # @option kwargs [String] :order_currency Filter by borrow coin name, uppercase only. e.g. `USDT`.
+      # @option kwargs [String] :state Filter by order state.
+      #   - `1`: Matching (order accepted, matching in progress)
+      #   - `2`: Partially filled & cancelled
+      #   - `3`: Fully filled
+      #   - `4`: Cancelled
+      # @option kwargs [String] :term Filter by loan term in days. e.g. `7`, `14`, `30`, `90`, `180`.
+      # @option kwargs [String] :limit Page size. Range: [1, 100]. Default: `10`.
+      # @option kwargs [String] :cursor Cursor for pagination. Use `nextPageCursor` from previous response.
+      # @return [Hash] Bybit V5 ApiResponse envelope (retCode / retMsg / result / retExtInfo / time).
+      # @see https://bybit-exchange.github.io/docs/v5/spot-margin-uta/fixedborrow-order-info
+      def query_fixed_borrow_orders(**kwargs)
+        params = Bybit::Utils::WireKeys.camelize(kwargs)
+        @session.sign_request(method: :get, path: '/v5/spot-margin-trade/fixedborrow-order-info', params: params)
+      end
+
+      # Query Fixed-Rate Borrow Market
+      #
+      # GET /v5/spot-margin-trade/fixedborrow-order-quote
+      #
+      # @param order_currency [String] Borrow coin name, uppercase only. e.g. `USDT`, `BTC`. **Required.**
+      # @option kwargs [String] :order_by Sort field.
+      #   - `apy`: Sort by annual interest rate
+      #   - `term`: Sort by loan term
+      #   - `quantity`: Sort by available quantity
+      # @option kwargs [String] :term Filter by loan term in days. e.g. `7`, `14`, `30`, `90`, `180`.
+      # @option kwargs [Integer] :sort Sort order.
+      #   - `0`: Ascending (default)
+      #   - `1`: Descending
+      # @option kwargs [Integer] :limit Page size. Range: [1, 100]. Default: `10`.
+      # @return [Hash] Bybit V5 ApiResponse envelope (retCode / retMsg / result / retExtInfo / time).
+      # @see https://bybit-exchange.github.io/docs/v5/spot-margin-uta/fixedborrow-order-quote
+      def query_fixed_borrow_market(order_currency:, **kwargs)
+        params = Bybit::Utils::WireKeys.camelize(kwargs.merge(order_currency: order_currency))
+        @session.sign_request(method: :get, path: '/v5/spot-margin-trade/fixedborrow-order-quote', params: params)
+      end
+
+      # Renew Fixed-Rate Borrow
+      #
+      # POST /v5/spot-margin-trade/fixedborrow-renew
+      #
+      # @param loan_id [String] The loan contract ID (corresponds to match order ID). Required.
+      # @option kwargs [String] :qty Renewal amount.
+      #   - If not provided, the full prepayment amount of the contract is used
+      #   - Must be greater than 0
+      # @return [Hash] Bybit V5 ApiResponse envelope (retCode / retMsg / result / retExtInfo / time).
+      # @see https://bybit-exchange.github.io/docs/v5/spot-margin-uta/fixedborrow-renew
+      def renew_fixed_borrow(loan_id:, **kwargs)
+        params = Bybit::Utils::WireKeys.camelize(kwargs.merge(loanId: loan_id))
+        @session.sign_request(method: :post, path: '/v5/spot-margin-trade/fixedborrow-renew', body: params)
+      end
+
+      # Get Flexible Available Inventory
+      #
+      # GET /v5/spot-margin-trade/flexible-available-inventory
+      #
+      # @param currency [String] Coin name, uppercase only. e.g. `BTC`
+      # @return [Hash] Bybit V5 ApiResponse envelope (retCode / retMsg / result / retExtInfo / time).
+      # @see https://bybit-exchange.github.io/docs/v5/spot-margin-uta/flexible-available-inventory
+      def get_trade_flexible_available_inventory(currency:)
+        params = Bybit::Utils::WireKeys.camelize({ currency: currency })
+        @session.sign_request(method: :get, path: '/v5/spot-margin-trade/flexible-available-inventory', params: params)
+      end
+
+      # Get Auto Repay Mode
+      #
+      # GET /v5/spot-margin-trade/get-auto-repay-mode
+      #
+      # @option kwargs [String] :currency Coin name, uppercase only. e.g. `ETH`. When omitted, returns settings for all currencies.
+      # @return [Hash] Bybit V5 ApiResponse envelope (retCode / retMsg / result / retExtInfo / time).
+      # @see https://bybit-exchange.github.io/docs/v5/spot-margin-uta/get-auto-repay-mode
+      def get_trade_auto_repay_mode(**kwargs)
+        params = Bybit::Utils::WireKeys.camelize(kwargs)
+        @session.sign_request(method: :get, path: '/v5/spot-margin-trade/get-auto-repay-mode', params: params)
+      end
+
+      # Query Borrow Liability
+      #
+      # GET /v5/spot-margin-trade/liability
+      #
+      # @param currency [String] Coin name, uppercase only. e.g. `USDT`, `BTC`. **Required.**
+      # @return [Hash] Bybit V5 ApiResponse envelope (retCode / retMsg / result / retExtInfo / time).
+      # @see https://bybit-exchange.github.io/docs/v5/spot-margin-uta/liability
+      def query_borrow_liability(currency:)
+        params = Bybit::Utils::WireKeys.camelize({ currency: currency })
+        @session.sign_request(method: :get, path: '/v5/spot-margin-trade/liability', params: params)
+      end
+
+      # Get Max Borrowable Amount
+      #
+      # GET /v5/spot-margin-trade/max-borrowable
+      #
+      # @param currency [String] Coin name, uppercase only. e.g. `BTC`
+      # @return [Hash] Bybit V5 ApiResponse envelope (retCode / retMsg / result / retExtInfo / time).
+      # @see https://bybit-exchange.github.io/docs/v5/spot-margin-uta/max-borrowable
+      def get_trade_max_borrowable(currency:)
+        params = Bybit::Utils::WireKeys.camelize({ currency: currency })
+        @session.sign_request(method: :get, path: '/v5/spot-margin-trade/max-borrowable', params: params)
+      end
+
+      # Get Repayment Available Amount
+      #
+      # GET /v5/spot-margin-trade/repayment-available-amount
+      #
+      # @param currency [String] Coin name, uppercase only. e.g. `BTC`
+      # @return [Hash] Bybit V5 ApiResponse envelope (retCode / retMsg / result / retExtInfo / time).
+      # @see https://bybit-exchange.github.io/docs/v5/spot-margin-uta/repayment-available-amount
+      def get_trade_repayment_available_amount(currency:)
+        params = Bybit::Utils::WireKeys.camelize({ currency: currency })
+        @session.sign_request(method: :get, path: '/v5/spot-margin-trade/repayment-available-amount', params: params)
+      end
+
+      # Set Auto Repay Mode
+      #
+      # POST /v5/spot-margin-trade/set-auto-repay-mode
+      #
+      # @param auto_repay_mode [String] Auto repay mode switch:
+      #   - `1`: Enable auto repay — Enable auto repay
+      #   - `0`: Disable auto repay — Disable auto repay
+      # @option kwargs [String] :currency Coin name, uppercase only (e.g. `USDT`, `ETH`).
+      #   If omitted, auto-repay is enabled/disabled for **all** currencies.
+      # @return [Hash] Bybit V5 ApiResponse envelope (retCode / retMsg / result / retExtInfo / time).
+      # @see https://bybit-exchange.github.io/docs/v5/spot-margin-uta/set-auto-repay-mode
+      def set_auto_repay_mode(auto_repay_mode:, **kwargs)
+        params = Bybit::Utils::WireKeys.camelize(kwargs.merge(autoRepayMode: auto_repay_mode))
+        @session.sign_request(method: :post, path: '/v5/spot-margin-trade/set-auto-repay-mode', body: params)
+      end
+
+      # Set spot cross margin leverage
+      #
+      # POST /v5/spot-margin-trade/set-leverage
+      #
+      # @param leverage [String] Leverage amount, valid range is 2 to 10
+      # @option kwargs [String] :currency Coin name, uppercase only (optional)
+      # @return [Hash] Bybit V5 ApiResponse envelope (retCode / retMsg / result / retExtInfo / time).
+      # @see https://bybit-exchange.github.io/docs/v5/spot-margin-uta/set-leverage
+      def spot_margin_set_leverage(leverage:, **kwargs)
+        params = Bybit::Utils::WireKeys.camelize(kwargs.merge(leverage: leverage))
+        @session.sign_request(method: :post, path: '/v5/spot-margin-trade/set-leverage', body: params)
+      end
+
+      # Get Spot Margin Trade Status
+      #
+      # GET /v5/spot-margin-trade/state
+      #
+      # @return [Hash] Bybit V5 ApiResponse envelope (retCode / retMsg / result / retExtInfo / time).
+      # @see https://bybit-exchange.github.io/docs/v5/spot-margin-uta/status
+      def get_trade_state
+        @session.sign_request(method: :get, path: '/v5/spot-margin-trade/state')
+      end
+
+      # Toggle spot cross margin mode
+      #
+      # POST /v5/spot-margin-trade/switch-mode
+      #
+      # @param spot_margin_mode [String] Spot margin mode: 1=on, 0=off
+      # @return [Hash] Bybit V5 ApiResponse envelope (retCode / retMsg / result / retExtInfo / time).
+      # @see https://bybit-exchange.github.io/docs/v5/spot-margin-uta/switch-mode
+      def spot_margin_switch_mode(spot_margin_mode:)
+        params = Bybit::Utils::WireKeys.camelize({ spotMarginMode: spot_margin_mode })
+        @session.sign_request(method: :post, path: '/v5/spot-margin-trade/switch-mode', body: params)
+      end
     end
   end
 end
diff --git a/lib/bybit/rest_api/user_service.rb b/lib/bybit/rest_api/user_service.rb
index 254c6b9..e2a763d 100644
--- a/lib/bybit/rest_api/user_service.rb
+++ b/lib/bybit/rest_api/user_service.rb
@@ -249,6 +249,16 @@ def update_sub_api_key(subuid:, read_only:, **kwargs)
         params[:permissions] = permissions unless permissions.nil?
         @session.sign_request(method: :post, path: '/v5/user/update-sub-api', body: params)
       end
+
+      # Query Referral Code
+      #
+      # GET /v5/user/invitation/code
+      #
+      # @return [Hash] Bybit V5 ApiResponse envelope (retCode / retMsg / result / retExtInfo / time).
+      # @see https://bybit-exchange.github.io/docs/v5/user/referral-code
+      def query_referral_code
+        @session.sign_request(method: :get, path: '/v5/user/invitation/code')
+      end
     end
   end
 end
diff --git a/lib/bybit/session.rb b/lib/bybit/session.rb
index 9e26642..51543ad 100644
--- a/lib/bybit/session.rb
+++ b/lib/bybit/session.rb
@@ -21,7 +21,8 @@ class Session
 
     def initialize(config)
       @config = config
-      @conn = config.faraday_connection || build_connection
+      @conn = config.faraday_connection ? config.faraday_connection.dup : build_connection
+      @conn.options.params_encoder = Faraday::FlatParamsEncoder
     end
 
     # Public unsigned endpoint — no X-BAPI-* headers attached.
@@ -52,9 +53,9 @@ def dispatch(method:, path:, signed:, params:, body:)
       headers = build_headers(signed: signed, method: method, query_str: query_str, body_str: body_str)
 
       # Build URL manually with our own query_str so the wire bytes match
-      # what we signed. `req.params =` would re-serialize through
-      # Faraday::NestedParamsEncoder which key-orders and array-brackets
-      # differently, breaking the signature.
+      # what we signed. Faraday still parses URLs passed to `req.url`, so use
+      # its flat encoder to preserve repeated keys instead of collapsing them
+      # or adding array brackets.
       full_url = if !query_str.empty? && PAYLOAD_QUERY_METHODS.include?(method)
                    "#{path}?#{query_str}"
                  else
diff --git a/lib/bybit/version.rb b/lib/bybit/version.rb
index 90323fa..692ef55 100644
--- a/lib/bybit/version.rb
+++ b/lib/bybit/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Bybit
-  VERSION = '0.1.1'
+  VERSION = '0.1.2'
 end
diff --git a/spec/services/account_service_spec.rb b/spec/services/account_service_spec.rb
index 312d0ef..313c36b 100644
--- a/spec/services/account_service_spec.rb
+++ b/spec/services/account_service_spec.rb
@@ -12,6 +12,7 @@
   # Filled in by the loop below — one row per method the scanner picked up.
   method_table = [
     { name: :batch_set_collateral, path: '/v5/account/set-collateral-switch-batch', method: :post, signed: true },
+    { name: :demo_apply_money, path: '/v5/account/demo-apply-money', method: :post, signed: true },
     { name: :get_borrow_history, path: '/v5/account/borrow-history', method: :get, signed: true },
     { name: :get_collateral_info, path: '/v5/account/collateral-info', method: :get, signed: true },
     { name: :get_dcp_info, path: '/v5/account/query-dcp-info', method: :get, signed: true },
@@ -20,8 +21,11 @@
     { name: :get_wallet_balance, path: '/v5/account/wallet-balance', method: :get, signed: true },
     { name: :get_instruments, path: '/v5/account/instruments-info', method: :get, signed: true },
     { name: :get_mmp_state, path: '/v5/account/mmp-state', method: :get, signed: true },
+    { name: :get_option_asset_info, path: '/v5/account/option-asset-info', method: :get, signed: true },
+    { name: :get_pay_info, path: '/v5/account/pay-info', method: :get, signed: true },
     { name: :get_smp_group, path: '/v5/account/smp-group', method: :get, signed: true },
     { name: :get_transaction_log, path: '/v5/account/transaction-log', method: :get, signed: true },
+    { name: :get_trade_info_for_analysis, path: '/v5/account/trade-info-for-analysis', method: :get, signed: true },
     { name: :get_transferable_amount, path: '/v5/account/withdrawal', method: :get, signed: true },
     { name: :get_user_settings, path: '/v5/account/user-setting-config', method: :get, signed: true },
     { name: :manual_borrow, path: '/v5/account/borrow', method: :post, signed: true },
@@ -56,4 +60,43 @@
       end
     end
   end
+
+  describe '#get_trade_info_for_analysis' do
+    it 'requires symbol' do
+      expect { svc.get_trade_info_for_analysis }
+        .to raise_error(ArgumentError, /missing keyword: :symbol/)
+    end
+  end
+
+  describe 'wire parameters for new endpoints' do
+    it 'camelizes demo fund configuration recursively' do
+      expect(session).to receive(:sign_request).with(
+        method: :post,
+        path: '/v5/account/demo-apply-money',
+        body: { adjustType: 1, utaDemoApplyMoney: [{ coin: 'USDT', amountStr: '10' }] }
+      )
+      svc.demo_apply_money(
+        adjust_type: 1,
+        uta_demo_apply_money: [{ coin: 'USDT', amount_str: '10' }]
+      )
+    end
+
+    it 'sends the pay-info coin as a query parameter' do
+      expect(session).to receive(:sign_request).with(
+        method: :get,
+        path: '/v5/account/pay-info',
+        params: { coin: 'USDT' }
+      )
+      svc.get_pay_info(coin: 'USDT')
+    end
+
+    it 'sends all trade-analysis query parameters with wire names' do
+      expect(session).to receive(:sign_request).with(
+        method: :get,
+        path: '/v5/account/trade-info-for-analysis',
+        params: { symbol: 'BTCUSDT', startTime: 1, endTime: 2 }
+      )
+      svc.get_trade_info_for_analysis(symbol: 'BTCUSDT', start_time: 1, end_time: 2)
+    end
+  end
 end
diff --git a/spec/services/asset_service_spec.rb b/spec/services/asset_service_spec.rb
index 7e5ccc4..f2b4960 100644
--- a/spec/services/asset_service_spec.rb
+++ b/spec/services/asset_service_spec.rb
@@ -43,6 +43,7 @@
     { name: :list_sub_member_deposit_records, path: '/v5/asset/deposit/query-sub-member-record', method: :get, signed: true },
     { name: :list_withdraw_addresses, path: '/v5/asset/withdraw/query-address', method: :get, signed: true },
     { name: :list_withdraw_records, path: '/v5/asset/withdraw/query-record', method: :get, signed: true },
+    { name: :limit_order_callback, path: '/v5/asset/exchange/limit-order/callback', method: :post, signed: true },
     { name: :quote_apply, path: '/v5/asset/exchange/quote-apply', method: :post, signed: true },
     { name: :send_withdraw, path: '/v5/asset/withdraw/create', method: :post, signed: true },
     { name: :set_default_deposit_to_account, path: '/v5/asset/deposit/deposit-to-account', method: :post, signed: true },
@@ -74,4 +75,22 @@
       end
     end
   end
+
+
+  describe '#limit_order_callback wire body' do
+    it 'sends every callback field with its OpenAPI wire name' do
+      expect(session).to receive(:sign_request).with(
+        method: :post,
+        path: '/v5/asset/exchange/limit-order/callback',
+        body: {
+          exchangeTxId: 'tx-1', optionType: 3, timeStamp: 123,
+          sign: 'callback-signature', appId: 'TimeResearch', errorCode: 'failed'
+        }
+      )
+      svc.limit_order_callback(
+        exchange_tx_id: 'tx-1', option_type: 3, time_stamp: 123,
+        sign: 'callback-signature', app_id: 'TimeResearch', error_code: 'failed'
+      )
+    end
+  end
 end
diff --git a/spec/services/crypto_loan_service_spec.rb b/spec/services/crypto_loan_service_spec.rb
index 7a08f80..69a6269 100644
--- a/spec/services/crypto_loan_service_spec.rb
+++ b/spec/services/crypto_loan_service_spec.rb
@@ -21,11 +21,14 @@
     { name: :get_fixed_borrow_contract_info, path: '/v5/crypto-loan-fixed/borrow-contract-info', method: :get, signed: true },
     { name: :get_fixed_borrow_order_info, path: '/v5/crypto-loan-fixed/borrow-order-info', method: :get, signed: true },
     { name: :get_fixed_borrow_order_quote, path: '/v5/crypto-loan-fixed/borrow-order-quote', method: :get, signed: false },
+    { name: :get_fixed_available_inventory, path: '/v5/crypto-loan-fixed/available-inventory', method: :get, signed: true },
+    { name: :get_fixed_repayment_history, path: '/v5/crypto-loan-fixed/repayment-history', method: :get, signed: true },
     { name: :get_fixed_renew_info, path: '/v5/crypto-loan-fixed/renew-info', method: :get, signed: true },
     { name: :get_fixed_supply_contract_info, path: '/v5/crypto-loan-fixed/supply-contract-info', method: :get, signed: true },
     { name: :get_fixed_supply_order_info, path: '/v5/crypto-loan-fixed/supply-order-info', method: :get, signed: true },
     { name: :get_fixed_supply_order_quote, path: '/v5/crypto-loan-fixed/supply-order-quote', method: :get, signed: false },
     { name: :get_flexible_borrow_history, path: '/v5/crypto-loan-flexible/borrow-history', method: :get, signed: true },
+    { name: :get_flexible_available_inventory, path: '/v5/crypto-loan-flexible/available-inventory', method: :get, signed: true },
     { name: :get_flexible_ongoing_coin, path: '/v5/crypto-loan-flexible/ongoing-coin', method: :get, signed: true },
     { name: :get_flexible_repayment_history, path: '/v5/crypto-loan-flexible/repayment-history', method: :get, signed: true },
     { name: :get_loanable_data, path: '/v5/crypto-loan-common/loanable-data', method: :get, signed: true },
@@ -37,6 +40,7 @@
     { name: :repay_fixed_with_collateral, path: '/v5/crypto-loan-fixed/repay-collateral', method: :post, signed: true },
     { name: :repay_flexible, path: '/v5/crypto-loan-flexible/repay', method: :post, signed: true },
     { name: :repay_flexible_with_collateral, path: '/v5/crypto-loan-flexible/repay-collateral', method: :post, signed: true },
+    { name: :supply_fixed, path: '/v5/crypto-loan-fixed/supply', method: :post, signed: true },
   ].freeze
 
   method_table.each do |row|
@@ -58,4 +62,51 @@
       end
     end
   end
+
+
+  describe 'wire parameters for new endpoints' do
+    it 'sends fixed available inventory query parameters' do
+      expect(session).to receive(:sign_request).with(
+        method: :get,
+        path: '/v5/crypto-loan-fixed/available-inventory',
+        params: { currency: 'USDT', term: '7', annualRate: '0.02' }
+      )
+      svc.get_fixed_available_inventory(currency: 'USDT', term: '7', annual_rate: '0.02')
+    end
+
+    it 'camelizes fixed repayment history filters' do
+      expect(session).to receive(:sign_request).with(
+        method: :get,
+        path: '/v5/crypto-loan-fixed/repayment-history',
+        params: { repayId: 'repay-1', loanCurrency: 'USDT', limit: '10', cursor: 'next' }
+      )
+      svc.get_fixed_repayment_history(
+        repay_id: 'repay-1', loan_currency: 'USDT', limit: '10', cursor: 'next'
+      )
+    end
+
+    it 'sends the complete fixed supply body' do
+      expect(session).to receive(:sign_request).with(
+        method: :post,
+        path: '/v5/crypto-loan-fixed/supply',
+        body: {
+          orderCurrency: 'USDT', orderAmount: '100', annualRate: '0.02',
+          term: '7', availableSource: '1'
+        }
+      )
+      svc.supply_fixed(
+        order_currency: 'USDT', order_amount: '100', annual_rate: '0.02',
+        term: '7', available_source: '1'
+      )
+    end
+
+    it 'sends the flexible inventory currency' do
+      expect(session).to receive(:sign_request).with(
+        method: :get,
+        path: '/v5/crypto-loan-flexible/available-inventory',
+        params: { currency: 'BTC' }
+      )
+      svc.get_flexible_available_inventory(currency: 'BTC')
+    end
+  end
 end
diff --git a/spec/services/earn_service_spec.rb b/spec/services/earn_service_spec.rb
index b5a37ea..e5b37fd 100644
--- a/spec/services/earn_service_spec.rb
+++ b/spec/services/earn_service_spec.rb
@@ -14,6 +14,7 @@
     { name: :add_liquidity, path: '/v5/earn/liquidity-mining/add-liquidity', method: :post, signed: true },
     { name: :add_margin, path: '/v5/earn/liquidity-mining/add-margin', method: :post, signed: true },
     { name: :claim_liquidity_interest, path: '/v5/earn/liquidity-mining/claim-interest', method: :post, signed: true },
+    { name: :edit_earn_auto_savings, path: '/v5/earn/flexible-saving/auto-savings', method: :post, signed: true },
     { name: :get_advance_earn_order, path: '/v5/earn/advance/order', method: :get, signed: true },
     { name: :get_advance_earn_position, path: '/v5/earn/advance/position', method: :get, signed: true },
     { name: :get_advance_earn_product, path: '/v5/earn/advance/product', method: :get, signed: false },
@@ -101,4 +102,49 @@
       end
     end
   end
+
+  describe '#list_auto_savings' do
+    it 'sends multiple coins as repeated query parameters and signs the exact query string' do
+      config = Bybit::Configuration.new
+      config.api_key = 'test-key'
+      config.api_secret = 'test-secret'
+      config.base_url = 'https://api-testnet.bybit.com'
+      seen_request = nil
+      stubs = Faraday::Adapter::Test::Stubs.new do |stub|
+        stub.get(%r{/v5/earn/flexible-saving/auto-savings}) do |request|
+          seen_request = request
+          [200, { 'Content-Type' => 'application/json' },
+           '{"retCode":0,"retMsg":"OK","result":{"coins":[]},"retExtInfo":{},"time":0}']
+        end
+      end
+      config.faraday_connection = Faraday.new(url: config.base_url) do |connection|
+        connection.adapter :test, stubs
+      end
+      service = described_class.new(Bybit::Session.new(config))
+
+      service.list_auto_savings(coins: %w[BTC ETH])
+
+      query = 'coins=BTC&coins=ETH'
+      timestamp = seen_request.request_headers['X-BAPI-TIMESTAMP']
+      expected_signature = Bybit::Authentication.sign_v5(
+        config.api_secret, timestamp, config.api_key, config.recv_window.to_s, query
+      )
+      expect(seen_request.url.query).to eq(query)
+      expect(seen_request.request_headers['X-BAPI-SIGN']).to eq(expected_signature)
+    end
+  end
+
+
+  describe '#edit_earn_auto_savings wire body' do
+    it 'camelizes optional settings and keeps the boolean value' do
+      expect(session).to receive(:sign_request).with(
+        method: :post,
+        path: '/v5/earn/flexible-saving/auto-savings',
+        body: { coin: 'BTC', purchaseImmediately: true, isSelected: false }
+      )
+      svc.edit_earn_auto_savings(
+        is_selected: false, coin: 'BTC', purchase_immediately: true
+      )
+    end
+  end
 end
diff --git a/spec/services/market_service_spec.rb b/spec/services/market_service_spec.rb
index bd3a26c..518d066 100644
--- a/spec/services/market_service_spec.rb
+++ b/spec/services/market_service_spec.rb
@@ -27,6 +27,7 @@
     { name: :get_open_interest, path: '/v5/market/open-interest', method: :get, signed: false },
     { name: :get_order_price_limit, path: '/v5/market/price-limit', method: :get, signed: false },
     { name: :get_orderbook, path: '/v5/market/orderbook', method: :get, signed: false },
+    { name: :get_option_base_coins, path: '/v5/market/option-base-coins', method: :get, signed: false },
     { name: :get_premium_index_price_kline, path: '/v5/market/premium-index-price-kline', method: :get, signed: false },
     { name: :get_recent_public_trades, path: '/v5/market/recent-trade', method: :get, signed: false },
     { name: :get_risk_limit, path: '/v5/market/risk-limit', method: :get, signed: false },
@@ -54,4 +55,15 @@
       end
     end
   end
+
+
+  describe '#get_option_base_coins wire query' do
+    it 'camelizes the comma-separated underlying type filter' do
+      expect(session).to receive(:public_request).with(
+        path: '/v5/market/option-base-coins',
+        params: { underlyingType: '0,2' }
+      )
+      svc.get_option_base_coins(underlying_type: '0,2')
+    end
+  end
 end
diff --git a/spec/services/position_service_spec.rb b/spec/services/position_service_spec.rb
index 93db33c..dab75ae 100644
--- a/spec/services/position_service_spec.rb
+++ b/spec/services/position_service_spec.rb
@@ -17,6 +17,7 @@
     { name: :get_closed_positions, path: '/v5/position/get-closed-positions', method: :get, signed: true },
     { name: :get_move_position_history, path: '/v5/position/move-history', method: :get, signed: true },
     { name: :get_positions, path: '/v5/position/list', method: :get, signed: true },
+    { name: :get_symbol_info, path: '/v5/position/symbol-info', method: :get, signed: true },
     { name: :move_position, path: '/v5/position/move-positions', method: :post, signed: true },
     { name: :set_auto_add_margin, path: '/v5/position/set-auto-add-margin', method: :post, signed: true },
     { name: :set_leverage, path: '/v5/position/set-leverage', method: :post, signed: true },
@@ -43,4 +44,16 @@
       end
     end
   end
+
+
+  describe '#get_symbol_info wire query' do
+    it 'sends category and the optional symbol' do
+      expect(session).to receive(:sign_request).with(
+        method: :get,
+        path: '/v5/position/symbol-info',
+        params: { symbol: 'BTCUSDT', category: 'linear' }
+      )
+      svc.get_symbol_info(category: 'linear', symbol: 'BTCUSDT')
+    end
+  end
 end
diff --git a/spec/services/spot_margin_service_spec.rb b/spec/services/spot_margin_service_spec.rb
index 5707703..197fc26 100644
--- a/spec/services/spot_margin_service_spec.rb
+++ b/spec/services/spot_margin_service_spec.rb
@@ -14,6 +14,22 @@
     { name: :get_historical_interest_rate, path: '/v5/spot-margin-trade/interest-rate-history', method: :get, signed: true },
     { name: :get_position_tiers, path: '/v5/spot-margin-trade/position-tiers', method: :get, signed: true },
     { name: :get_tiered_collateral_ratio, path: '/v5/spot-margin-trade/collateral', method: :get, signed: false },
+    { name: :get_trade_coin_state, path: '/v5/spot-margin-trade/coinstate', method: :get, signed: true },
+    { name: :query_fixed_available_inventory, path: '/v5/spot-margin-trade/fixed-available-inventory', method: :get, signed: true },
+    { name: :account_fixed_borrow, path: '/v5/spot-margin-trade/fixedborrow', method: :post, signed: true },
+    { name: :query_fixed_borrow_contracts, path: '/v5/spot-margin-trade/fixedborrow-contract-info', method: :get, signed: true },
+    { name: :query_fixed_borrow_orders, path: '/v5/spot-margin-trade/fixedborrow-order-info', method: :get, signed: true },
+    { name: :query_fixed_borrow_market, path: '/v5/spot-margin-trade/fixedborrow-order-quote', method: :get, signed: true },
+    { name: :renew_fixed_borrow, path: '/v5/spot-margin-trade/fixedborrow-renew', method: :post, signed: true },
+    { name: :get_trade_flexible_available_inventory, path: '/v5/spot-margin-trade/flexible-available-inventory', method: :get, signed: true },
+    { name: :get_trade_auto_repay_mode, path: '/v5/spot-margin-trade/get-auto-repay-mode', method: :get, signed: true },
+    { name: :query_borrow_liability, path: '/v5/spot-margin-trade/liability', method: :get, signed: true },
+    { name: :get_trade_max_borrowable, path: '/v5/spot-margin-trade/max-borrowable', method: :get, signed: true },
+    { name: :get_trade_repayment_available_amount, path: '/v5/spot-margin-trade/repayment-available-amount', method: :get, signed: true },
+    { name: :set_auto_repay_mode, path: '/v5/spot-margin-trade/set-auto-repay-mode', method: :post, signed: true },
+    { name: :spot_margin_set_leverage, path: '/v5/spot-margin-trade/set-leverage', method: :post, signed: true },
+    { name: :get_trade_state, path: '/v5/spot-margin-trade/state', method: :get, signed: true },
+    { name: :spot_margin_switch_mode, path: '/v5/spot-margin-trade/switch-mode', method: :post, signed: true },
     { name: :get_vip_margin_data, path: '/v5/spot-margin-trade/data', method: :get, signed: false },
   ].freeze
 
@@ -36,4 +52,157 @@
       end
     end
   end
+
+  describe '#query_fixed_borrow_market' do
+    it 'allows order_by to be omitted' do
+      expect(session).to receive(:sign_request).with(
+        method: :get,
+        path: '/v5/spot-margin-trade/fixedborrow-order-quote',
+        params: { orderCurrency: 'USDT' }
+      )
+
+      svc.query_fixed_borrow_market(order_currency: 'USDT')
+    end
+  end
+
+
+  describe 'wire parameters for new endpoints' do
+    it 'sends the optional coin-state currency' do
+      expect(session).to receive(:sign_request).with(
+        method: :get, path: '/v5/spot-margin-trade/coinstate',
+        params: { currency: 'BTC' }
+      )
+      svc.get_trade_coin_state(currency: 'BTC')
+    end
+
+    it 'sends fixed inventory parameters' do
+      expect(session).to receive(:sign_request).with(
+        method: :get, path: '/v5/spot-margin-trade/fixed-available-inventory',
+        params: { currency: 'USDT', term: '7', annualRate: '0.02' }
+      )
+      svc.query_fixed_available_inventory(currency: 'USDT', term: '7', annual_rate: '0.02')
+    end
+
+    it 'sends the complete fixed borrow body' do
+      expect(session).to receive(:sign_request).with(
+        method: :post, path: '/v5/spot-margin-trade/fixedborrow',
+        body: {
+          repayType: '1', strategyType: 'FULL', orderCurrency: 'USDT',
+          orderAmount: '100', annualRate: '0.02', term: '7'
+        }
+      )
+      svc.account_fixed_borrow(
+        order_currency: 'USDT', order_amount: '100', annual_rate: '0.02', term: '7',
+        repay_type: '1', strategy_type: 'FULL'
+      )
+    end
+
+    it 'camelizes fixed contract filters' do
+      expect(session).to receive(:sign_request).with(
+        method: :get, path: '/v5/spot-margin-trade/fixedborrow-contract-info',
+        params: {
+          orderId: 'order-1', orderCurrency: 'USDT', term: '7', limit: '10', cursor: 'next'
+        }
+      )
+      svc.query_fixed_borrow_contracts(
+        order_id: 'order-1', order_currency: 'USDT', term: '7', limit: '10', cursor: 'next'
+      )
+    end
+
+    it 'camelizes fixed order filters' do
+      expect(session).to receive(:sign_request).with(
+        method: :get, path: '/v5/spot-margin-trade/fixedborrow-order-info',
+        params: {
+          orderId: 'order-1', orderCurrency: 'USDT', state: '3',
+          term: '7', limit: '10', cursor: 'next'
+        }
+      )
+      svc.query_fixed_borrow_orders(
+        order_id: 'order-1', order_currency: 'USDT', state: '3',
+        term: '7', limit: '10', cursor: 'next'
+      )
+    end
+
+    it 'sends every fixed market query parameter' do
+      expect(session).to receive(:sign_request).with(
+        method: :get, path: '/v5/spot-margin-trade/fixedborrow-order-quote',
+        params: { term: '7', orderBy: 'apy', sort: 1, limit: 20, orderCurrency: 'USDT' }
+      )
+      svc.query_fixed_borrow_market(
+        order_currency: 'USDT', term: '7', order_by: 'apy', sort: 1, limit: 20
+      )
+    end
+
+    it 'sends the fixed renewal body' do
+      expect(session).to receive(:sign_request).with(
+        method: :post, path: '/v5/spot-margin-trade/fixedborrow-renew',
+        body: { qty: '10', loanId: 'loan-1' }
+      )
+      svc.renew_fixed_borrow(loan_id: 'loan-1', qty: '10')
+    end
+
+    it 'sends the flexible inventory currency' do
+      expect(session).to receive(:sign_request).with(
+        method: :get, path: '/v5/spot-margin-trade/flexible-available-inventory',
+        params: { currency: 'BTC' }
+      )
+      svc.get_trade_flexible_available_inventory(currency: 'BTC')
+    end
+
+    it 'sends the optional auto-repay currency query' do
+      expect(session).to receive(:sign_request).with(
+        method: :get, path: '/v5/spot-margin-trade/get-auto-repay-mode',
+        params: { currency: 'ETH' }
+      )
+      svc.get_trade_auto_repay_mode(currency: 'ETH')
+    end
+
+    it 'sends the liability currency' do
+      expect(session).to receive(:sign_request).with(
+        method: :get, path: '/v5/spot-margin-trade/liability',
+        params: { currency: 'USDT' }
+      )
+      svc.query_borrow_liability(currency: 'USDT')
+    end
+
+    it 'sends the max-borrowable currency' do
+      expect(session).to receive(:sign_request).with(
+        method: :get, path: '/v5/spot-margin-trade/max-borrowable',
+        params: { currency: 'BTC' }
+      )
+      svc.get_trade_max_borrowable(currency: 'BTC')
+    end
+
+    it 'sends the repayment-availability currency' do
+      expect(session).to receive(:sign_request).with(
+        method: :get, path: '/v5/spot-margin-trade/repayment-available-amount',
+        params: { currency: 'BTC' }
+      )
+      svc.get_trade_repayment_available_amount(currency: 'BTC')
+    end
+
+    it 'sends the auto-repay mode body' do
+      expect(session).to receive(:sign_request).with(
+        method: :post, path: '/v5/spot-margin-trade/set-auto-repay-mode',
+        body: { currency: 'ETH', autoRepayMode: '1' }
+      )
+      svc.set_auto_repay_mode(auto_repay_mode: '1', currency: 'ETH')
+    end
+
+    it 'sends the leverage body' do
+      expect(session).to receive(:sign_request).with(
+        method: :post, path: '/v5/spot-margin-trade/set-leverage',
+        body: { currency: 'BTC', leverage: '4' }
+      )
+      svc.spot_margin_set_leverage(leverage: '4', currency: 'BTC')
+    end
+
+    it 'sends the margin-mode body' do
+      expect(session).to receive(:sign_request).with(
+        method: :post, path: '/v5/spot-margin-trade/switch-mode',
+        body: { spotMarginMode: '1' }
+      )
+      svc.spot_margin_switch_mode(spot_margin_mode: '1')
+    end
+  end
 end
diff --git a/spec/services/user_service_spec.rb b/spec/services/user_service_spec.rb
index 9cf0662..2f3bbf6 100644
--- a/spec/services/user_service_spec.rb
+++ b/spec/services/user_service_spec.rb
@@ -25,6 +25,7 @@
     { name: :list_sub_api_keys, path: '/v5/user/sub-apikeys', method: :get, signed: true },
     { name: :list_sub_member_uids, path: '/v5/user/query-sub-members', method: :get, signed: true },
     { name: :list_sub_members, path: '/v5/user/submembers', method: :get, signed: true },
+    { name: :query_referral_code, path: '/v5/user/invitation/code', method: :get, signed: true },
     { name: :sign_agreement, path: '/v5/user/agreement', method: :post, signed: true },
     { name: :update_api_key, path: '/v5/user/update-api', method: :post, signed: true },
     { name: :update_sub_api_key, path: '/v5/user/update-sub-api', method: :post, signed: true },
diff --git a/spec/session_spec.rb b/spec/session_spec.rb
index c4ebed9..5647285 100644
--- a/spec/session_spec.rb
+++ b/spec/session_spec.rb
@@ -13,6 +13,18 @@
   end
   let(:session) { described_class.new(config) }
 
+  describe 'custom Faraday connection' do
+    it 'does not mutate the injected connection params encoder' do
+      connection = Faraday.new(url: config.base_url) do |faraday|
+        faraday.adapter :test, Faraday::Adapter::Test::Stubs.new
+      end
+      config.faraday_connection = connection
+
+      expect { described_class.new(config) }
+        .not_to change { connection.options.params_encoder }
+    end
+  end
+
   describe 'signed dispatch' do
     it 'signs GET query-string exactly as it appears on the wire' do
       url = %r{https://api-testnet\.bybit\.com/v5/account/wallet-balance}