refactor

cashu/core/split.py

@@ -0,0 +1,8 @@
+def amount_split(amount):
+    """Given an amount returns a list of amounts returned e.g. 13 is [1, 4, 8]."""
+    bits_amt = bin(amount)[::-1][:-2]
+    rv = []
+    for (pos, bit) in enumerate(bits_amt):
+        if bit == "1":
+            rv.append(2**pos)
+    return rv