fn handle_primary_synchronization_order()

in fastpay_core/src/authority.rs [232:258]

• 24 lines of code
• 2 McCabe index (conditional complexity)

    fn handle_primary_synchronization_order(
        &mut self,
        order: PrimarySynchronizationOrder,
    ) -> Result<AccountInfoResponse, FastPayError> {
        // Update recipient state; note that the blockchain client is trusted.
        let recipient = order.recipient;
        fp_ensure!(self.in_shard(&recipient), FastPayError::WrongShard);

        let recipient_account = self
            .accounts
            .entry(recipient)
            .or_insert_with(AccountOffchainState::new);
        if order.transaction_index <= self.last_transaction_index {
            // Ignore old transaction index.
            return Ok(recipient_account.make_account_info(recipient));
        }
        fp_ensure!(
            order.transaction_index == self.last_transaction_index.increment()?,
            FastPayError::UnexpectedTransactionIndex
        );
        let recipient_balance = recipient_account.balance.try_add(order.amount.into())?;
        let last_transaction_index = self.last_transaction_index.increment()?;
        recipient_account.balance = recipient_balance;
        recipient_account.synchronization_log.push(order);
        self.last_transaction_index = last_transaction_index;
        Ok(recipient_account.make_account_info(recipient))
    }