def middleware(method, params):
if method != "eth_sign":
return make_request(method, params)
account_address, message = params[:2]
account = address_to_accounts[account_address]
# We will assume any string which looks like a hex is expected
# to be converted to hex. Non-hexable strings are forcibly
# converted by encoding them to utf-8
try:
message = HexBytes(message)
except Exception: # pylint: disable=broad-except
message = HexBytes(message.encode("utf-8"))
msg_hash_hexbytes = messages.defunct_hash_message(message)
ec_signature = account.signHash(msg_hash_hexbytes)
return {"result": ec_signature.signature}
