> For the complete documentation index, see [llms.txt](https://docs.alienxchain.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.alienxchain.io/support/faq/node-pre-book.md).

# Node Pre-Book

**Pre-book**

 **(Besides the rules on Pre-Book page, and use 0.01 ETH as example in all below contents):** 

**1. In one transaction, no matter how much the user deposit (more than 0.01 ETH), only one double-refund chance will be calculated.** 

**Example:** Sasha deposited 0.03ETH and then 0.05ETH, then system will count as 2 double-refund chances, not 8. 

This means users should only deposit 0.01ETH in one transaction. So if Sasha wants to purchase 8 nodes, he should deposit 8 times with 0.01 ETH each time.

**2. If the user don't purchase any nodes in the end, the 0.01 ETH will be refunded without being doubled** 

**Example:** Sasha deposited 0.01ETH and got one double-refund chance, but he didn't purchase any nodes during the sale, then he will be refunded with the 0.01ETH he deposited.

**3. If the user purchased less nodes than the double-refund chances, the remaining pre-book ETH will be refunded without being doubled.** 

**Example:** Sasha deposited 0.01x8=0.08 ETH, 8 transactions in total, but he only purchased 6 nodes, then he will be refunded with 6x0.01x2+2x0.01=0.14ETH

**Note:** 

⚠️ DON'T USE Centralized Exchange Address, this situation **can't get refunded** 

⚠️ DON'T deposite to unsupported networks, this situation **can't get refunded** 

⚠️ Please use the same address to deposit and purchase. (Make sure that your deposit address and purchase address matches)

**预定须知 (除页面已展示规则外，下文中均使用 0.01 ETH 举例):** 

**1. 在一笔充值中，不管用户实际充值金额多少（大于0.01ETH），都只计算一次双倍返还机会。** 

**举例:** Sasha 充值了一笔 0.03ETH 和一笔 0.05ETH, 那么他拥有 2 次双倍返还机会, 而不是 8 次。 也就是说用户每一笔充值都应当刚好充值 0.01ETH。 

那么如果 Sasha 想要买 8 个节点，那他现在应该充值 8 次，每次 0.01 ETH。

**2. 如果用户最后没有购买任何节点，那么充值的 0.01 ETH 会退回，但不会翻倍** 

**举例：** Sasha 充值了 0.01ETH 获得了一次双倍返还的机会, 但他最终在节点售卖中一个节点也没有买, 那他会收到退回的 0.01ETH。

**3. 如果用户实际购买的节点数比获得的双倍返还机会次数少，那么多余的预售金将被退还但不翻倍。** 

**举例:** Sasha 充值了 0.01x8=0.08 ETH, 总共 8 笔交易, 但他最终只买了 6 个节点, 那么最终他的返还金额是 6x0.01x2+2x0.01=0.14ETH。

**请注意**： 

⚠️ 请勿使用中心化交易所地址，这种情况无法退回 

⚠️ 转帐前务必确认网络，不要转到其他不支持的网络，这种情况无法退回 

⚠️ 请使用同一个地址去充值以及购买（确保充值和购买的地址一一对应）

\===================

Q: Can I use one address to deposit and another address to purchase node? Can I enjoy my double-refund in this way? 

A: No, please use the same address to deposit and purchase. Example: Sasha used address A to deposit, then he should also use the same address to purchase nodes in order to get double-refund. 

Q: 我可以用一个地址充值然后另一个地址购买Node吗？这样可以享受到我获得的双倍返还吗？

A: 不可以的，请确保您使用同一个地址来充值和购买（一一对应）。