From ff7cc9b9cb1643fba5778388e4c1ea69acc8f91e Mon Sep 17 00:00:00 2001
From: Ben Hauser <ben@hauser.id>
Date: Sun, 7 Jun 2020 19:12:09 +0400
Subject: [PATCH] fix: delete `required_confs` prior to making a call

---
 brownie/network/contract.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/brownie/network/contract.py b/brownie/network/contract.py
index 290238c73..004a05935 100644
--- a/brownie/network/contract.py
+++ b/brownie/network/contract.py
@@ -919,7 +919,9 @@ def call(self, *args: Tuple, block_identifier: Union[int, str, bytes] = None) ->
         args, tx = _get_tx(self._owner, args)
         if tx["from"]:
             tx["from"] = str(tx["from"])
+        del tx["required_confs"]
         tx.update({"to": self._address, "data": self.encode_input(*args)})
+
         try:
             data = web3.eth.call({k: v for k, v in tx.items() if v}, block_identifier)
         except ValueError as e: