fix: correct type for gas and gas_limit (int, not Wei)

Author: coccoinomane

docs/middleware.rst

@@ -78,7 +78,7 @@ Buffered Gas Estimate
     This adds a gas estimate to transactions if ``gas`` is not present in the transaction
     parameters. Sets gas to:
     ``min(w3.eth.estimate_gas + gas_buffer, gas_limit)``
-    where the gas_buffer default is 100,000 Wei
+    where the gas_buffer default is 100,000
 
 HTTPRequestRetry
 ~~~~~~~~~~~~~~~~~~

web3/_utils/async_transactions.py

@@ -17,16 +17,16 @@
 
 async def get_block_gas_limit(
     web3_eth: "AsyncEth", block_identifier: Optional[BlockIdentifier] = None
-) -> Wei:
+) -> int:
     if block_identifier is None:
         block_identifier = await web3_eth.block_number
     block = await web3_eth.get_block(block_identifier)
     return block['gasLimit']
 
 
 async def get_buffered_gas_estimate(
-    web3: "Web3", transaction: TxParams, gas_buffer: Wei = Wei(100000)
-) -> Wei:
+    web3: "Web3", transaction: TxParams, gas_buffer: int = 100000
+) -> int:
     gas_estimate_transaction = cast(TxParams, dict(**transaction))
 
     gas_estimate = await web3.eth.estimate_gas(gas_estimate_transaction)  # type: ignore
@@ -40,4 +40,4 @@ async def get_buffered_gas_estimate(
             "limit: {1}".format(gas_estimate, gas_limit)
         )
 
-    return Wei(min(gas_limit, gas_estimate + gas_buffer))
+    return min(gas_limit, gas_estimate + gas_buffer)