From 6c8c2e4874a4a5f68046a6a1d7b6b8b0c6ce961c Mon Sep 17 00:00:00 2001
From: Jack Nelson <jack@jacknelson.xyz>
Date: Thu, 31 Mar 2022 15:06:00 -0400
Subject: [PATCH] remove duplicate code.

---
 chia/wallet/coin_selection.py | 29 +++++++++++++----------------
 1 file changed, 13 insertions(+), 16 deletions(-)

diff --git a/chia/wallet/coin_selection.py b/chia/wallet/coin_selection.py
index 38d552b304db..fe23c416a555 100644
--- a/chia/wallet/coin_selection.py
+++ b/chia/wallet/coin_selection.py
@@ -78,8 +78,7 @@ async def select_coins(
         log.debug(f"Selected all smaller coins because they equate to an exact match of the target.: {smaller_coins}")
         return set(smaller_coins)
     elif smaller_coin_sum < amount:
-        smallest_coin = select_smallest_coin_over_target(smaller_coins, valid_spendable_coins)
-        assert smallest_coin is not None
+        smallest_coin = select_smallest_coin_over_target(smaller_coins, valid_spendable_coins, amount)
         log.debug(f"Selected closest greater coin: {smallest_coin.name()}")
         return {smallest_coin}
     elif smaller_coin_sum > amount:
@@ -88,21 +87,11 @@ async def select_coins(
         if coin_set is None:
             raise ValueError("Knapsack algorithm failed to find a solution.")
         if len(coin_set) > max_num_coins:
-            coin = select_smallest_coin_over_target(smaller_coins, valid_spendable_coins)
-            if coin is None or coin.amount < amount:
-                raise ValueError(
-                    "Can't make this transaction because the transaction would use over 500 "
-                    "coins which is unlikely to get confirmed. Try making a smaller transaction to condense the dust."
-                )
+            coin = select_smallest_coin_over_target(smaller_coins, valid_spendable_coins, amount)
             coin_set = {coin}
         return coin_set
     else:
-        coin = select_smallest_coin_over_target(smaller_coins, valid_spendable_coins)
-        if coin is None or coin.amount < amount:
-            raise ValueError(
-                "Can't make this transaction because the transaction would use over 500 "
-                "coins which is unlikely to get confirmed. Try making a smaller transaction to condense the dust."
-            )
+        coin = select_smallest_coin_over_target(smaller_coins, valid_spendable_coins, amount)
         log.debug(f"Resorted to selecting smallest coin over target due to dust.: {coin}")
         return {coin}
 
@@ -118,12 +107,20 @@ def check_for_exact_match(coin_list: List[Coin], target: uint64) -> Optional[Coi
     return None
 
 
-def select_smallest_coin_over_target(smaller_coin_list: List[Coin], valid_spendable_coin_list: List[Coin]) -> Coin:
+def select_smallest_coin_over_target(
+    smaller_coin_list: List[Coin], valid_spendable_coin_list: List[Coin], target_amount: uint128
+) -> Coin:
     if len(smaller_coin_list) > 0:  # in case we only have bigger coins.
         greater_coins = valid_spendable_coin_list[: -len(smaller_coin_list)]
     else:
         greater_coins = valid_spendable_coin_list
-    return greater_coins[len(greater_coins) - 1]  # select the coin with the least value.
+    coin = greater_coins[len(greater_coins) - 1]  # select the coin with the least value.
+    if coin is None or coin.amount < target_amount:
+        raise ValueError(
+            "Can't make this transaction because the transaction would use over 500 "
+            "coins which is unlikely to get confirmed. Try making a smaller transaction to condense the dust."
+        )
+    return coin
 
 
 # we use this to find the set of coins which have total value closest to the target, but at least the target.