  assert(self.support_handler.read((from_chain, from_handler)) && 
  self.support_handler.read((to_chain, contract_address_to_u256(to_handler))), 'not support handler');
fn cross_chain_erc20_settlement(ref self: ContractState, to_chain: felt252, to_handler: u256, to_token: u256, to: u256, amount: u256) -> felt252{
          assert(self.support_handler.read((to_chain, to_handler)), 'not support handler');
-  assert(self.support_handler.read((from_chain, from_handler)) && self.support_handler.read((to_chain, contract_address_to_u256(to_handler))), 'not support handler');
+  assert(self.support_handler.read((from_chain, from_handler))), 'not support handler');
