venv

1 files changed, 23 insertions, 0 deletions

diff --git a/venv/lib/python3.11/site-packages/faker/utils/checksums.py b/venv/lib/python3.11/site-packages/faker/utils/checksums.py
new file mode 100644
index 0000000..9c06daf
--- /dev/null
+++ b/venv/lib/python3.11/site-packages/faker/utils/checksums.py
@@ -0,0 +1,23 @@
+from typing import List
+
+
+def luhn_checksum(number: float) -> int:
+    def digits_of(n: float) -> List[int]:
+        return [int(d) for d in str(n)]
+
+    digits = digits_of(number)
+    odd_digits = digits[-1::-2]
+    even_digits = digits[-2::-2]
+    checksum = 0
+    checksum += sum(odd_digits)
+    for d in even_digits:
+        checksum += sum(digits_of(d * 2))
+    return checksum % 10
+
+
+def calculate_luhn(partial_number: float) -> int:
+    """
+    Generates the Checksum using Luhn's algorithm
+    """
+    check_digit = luhn_checksum(int(partial_number) * 10)
+    return check_digit if check_digit == 0 else 10 - check_digit