Add logging to swap_with_slippage_protection()

CHANGELOG.md

@@ -1,3 +1,8 @@
+# 0.22.1
+
+- Add logging to `swap_with_slippage_protection()` on Uniswap v3 
+  to trace slippage issues
+
 # 0.22
 
 - Refactor a lot of functionality to a new submodule [eth_defi.provider](https://web3-ethereum-defi.readthedocs.io/api/provider/index.html) 

eth_defi/uniswap_v3/swap.py

@@ -1,6 +1,7 @@
 """Uniswap v3 swap helper functions."""
 import warnings
 from typing import Callable
+import logging
 
 from eth_typing import HexAddress
 from web3.contract import Contract
@@ -10,6 +11,9 @@
 from eth_defi.uniswap_v3.utils import encode_path
 
 
+logger = logging.getLogger(__name__)
+
+
 def swap_with_slippage_protection(
     uniswap_v3_deployment: UniswapV3Deployment,
     *,
@@ -102,6 +106,8 @@ def swap_with_slippage_protection(
             slippage=max_slippage,
         )
 
+        logger.info("exactInput() amount in: %s, estimated_min_amount_out: %s", amount_in, estimated_min_amount_out)
+
         return router.functions.exactInput(
             (
                 encoded_path,
@@ -122,6 +128,8 @@ def swap_with_slippage_protection(
             slippage=max_slippage,
         )
 
+        logger.info("exactInput() amount out: %s, estimated_max_amount_in: %s", amount_out, estimated_max_amount_in)
+
         return router.functions.exactOutput(
             (
                 encoded_path,