Merge pull request #1110 from SatoshiAndKin/solidity_0.8.4_errors

don't crash on solidity 0.8.4 typed errors

Author: iamdefinitelyahuman

CHANGELOG.md

@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Fixed subcalls to empty accounts not appearing in the subcalls property of TransactionReceipts ([#1106](https://github.com/eth-brownie/brownie/pull/1106))
 - Add support for `POLYGONSCAN_TOKEN` env var ([#1135](https://github.com/eth-brownie/brownie/pull/1135))
 - Add Multicall context manager ([#1125](https://github.com/eth-brownie/brownie/pull/1125))
+- Add initial support for Solidity 0.8's typed errors ([#1110](https://github.com/eth-brownie/brownie/pull/1110))
 
 ### Added
 - Added `LocalAccount.sign_message` method to sign `EIP712Message` objects ([#1097](https://github.com/eth-brownie/brownie/pull/1097))

brownie/network/transaction.py

@@ -652,14 +652,20 @@ def _reverted_trace(self, trace: Sequence) -> None:
             if step["op"] == "REVERT" and int(step["stack"][-2], 16):
                 # get returned error string from stack
                 data = _get_memory(step, -1)
-                if data[:4].hex() == "0x4e487b71":  # keccak of Panic(uint256)
+
+                selector = data[:4].hex()
+
+                if selector == "0x4e487b71":  # keccak of Panic(uint256)
                     error_code = int(data[4:].hex(), 16)
                     if error_code in SOLIDITY_ERROR_CODES:
                         self._revert_msg = SOLIDITY_ERROR_CODES[error_code]
                     else:
                         self._revert_msg = f"Panic (error code: {error_code})"
-                else:
+                elif selector == "0x08c379a0":  # keccak of Error(string)
                     self._revert_msg = decode_abi(["string"], data[4:])[0]
+                else:
+                    # TODO: actually parse the data
+                    self._revert_msg = f"typed error: {data.hex()}"
 
             elif self.contract_address:
                 self._revert_msg = "invalid opcode" if step["op"] == "INVALID" else ""