Add funding related rest endpoints, refactor pre-existent rest endpoints to use get_ prefix. Add function to calculate flags easily. Add example test to create a funding offer.

bfxapi/utils/flags.py

@@ -0,0 +1,29 @@
+from .. enums import Flag
+
+def calculate_order_flags(
+    hidden : bool = False,
+    close : bool = False,
+    reduce_only : bool = False,
+    post_only : bool = False,
+    oco : bool = False,
+    no_var_rates: bool = False
+) -> int:
+    flags = 0
+
+    if hidden: flags += Flag.HIDDEN
+    if close: flags += Flag.CLOSE
+    if reduce_only: flags += Flag.REDUCE_ONLY
+    if post_only: flags += Flag.POST_ONLY
+    if oco: flags += Flag.OCO
+    if no_var_rates: flags += Flag.NO_VAR_RATES
+
+    return flags
+
+def calculate_offer_flags(
+    hidden : bool = False
+) -> int:
+    flags = 0
+
+    if hidden: flags += Flag.HIDDEN
+
+    return flags