feat(converters): add from_wei and to_wei

cic_utils/converters.py

@@ -0,0 +1,43 @@
+import decimal
+import fractions
+import math
+def from_wei(decimals: int, value: int) -> float:
+    """This function converts values in Wei to a token in the cic network.
+    :param decimals: The decimals required for wei values.
+    :type decimals: int
+    :param value: Value in Wei
+    :type value: int
+    :return: SRF equivalent of value in Wei
+    :rtype: float
+    """
+    value = float(value) / (10**decimals)
+    return truncate(value=value, decimals=2)
+
+
+def to_wei(decimals: int, value: int) -> int:
+    """This functions converts values from a token in the cic network to Wei.
+    :param decimals: The decimals required for wei values.
+    :type decimals: int
+    :param value: Value in SRF
+    :type value: int
+    :return: Wei equivalent of value in SRF
+    :rtype: int
+    """
+    return int(value * (10**decimals))
+
+def truncate(value: float, decimals: int) -> float:
+    """This function truncates a value to a specified number of decimals places.
+    :param value: The value to be truncated.
+    :type value: float
+    :param decimals: The number of decimals for the value to be truncated to
+    :type decimals: int
+    :return: The truncated value.
+    :rtype: int
+    """
+    with decimal.localcontext() as ctx:
+        d = decimal.Decimal(str(value))
+        # if d.as_tuple().exponent <= -15:
+        #     raise ValueError('Value too small to truncate')
+        ctx.rounding = decimal.ROUND_DOWN
+        return float(round(d, decimals))
+