crowetic/mev-inspect-py
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Adjust front/back heavy logic

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This commit is contained in:
Gui Heise 2022-08-03 12:46:07 -04:00
parent c8da3e34ae
commit deb6853828
1 changed files with 25 additions and 5 deletions
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30
mev_inspect/sandwiches.py
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@ -59,10 +59,32 @@ def _get_sandwich_starting_with_swap(
and back_swap.from_address == sandwicher_address
):
if len(sandwiched_swaps) > 0:
profit_amount: float
if back_swap.token_in_amount == 0 and back_swap.error is None:
raise ValueError("Backrun cannot swap 0 tokens")
exchange_rate = front_swap.token_out_amount / back_swap.token_in_amount
profit_amount = exchange_rate * back_swap.token_out_amount - front_swap.token_in_amount
if back_swap.token_in_amount == front_swap.token_out_amount:
profit_amount = (
back_swap.token_out_amount - front_swap.token_in_amount
)
if back_swap.token_in_amount > front_swap.token_out_amount:
exchange_rate = (
front_swap.token_out_amount / back_swap.token_in_amount
)
profit_amount = (
exchange_rate * back_swap.token_out_amount
- front_swap.token_in_amount
)
if back_swap.token_in_amount < front_swap.token_out_amount:
exchange_rate = (
back_swap.token_in_amount / front_swap.token_out_amount
)
profit_amount = (
back_swap.token_out_amount
- exchange_rate * front_swap.token_in_amount
)
return Sandwich(
block_number=front_swap.block_number,
sandwicher_address=sandwicher_address,
@ -71,8 +93,6 @@ def _get_sandwich_starting_with_swap(
sandwiched_swaps=sandwiched_swaps,
profit_token_address=front_swap.token_in_address,
profit_amount=profit_amount,
)
)
return None