# 通过 REST API 购买

- [使用签名交易 (Signed tx)](https://docs.tronsave.io/chinese/developer/rest-api-v0/buy-on-rest-api/use-signed-transaction.md)
- [估算TRX](https://docs.tronsave.io/chinese/developer/rest-api-v0/buy-on-rest-api/use-signed-transaction/estimate-trx.md)
- [获取已签名交易](https://docs.tronsave.io/chinese/developer/rest-api-v0/buy-on-rest-api/use-signed-transaction/get-signed-transaction.md)
- [创建订单](https://docs.tronsave.io/chinese/developer/rest-api-v0/buy-on-rest-api/use-signed-transaction/create-order.md)
- [Demo](https://docs.tronsave.io/chinese/developer/rest-api-v0/buy-on-rest-api/use-signed-transaction/demo.md)
- [使用 API 密钥](https://docs.tronsave.io/chinese/developer/rest-api-v0/buy-on-rest-api/use-api-key.md)
- [获取内部账户信息](https://docs.tronsave.io/chinese/developer/rest-api-v0/buy-on-rest-api/use-api-key/get-internal-account-info.md)
- [获取订单簿 (Order book)](https://docs.tronsave.io/chinese/developer/rest-api-v0/buy-on-rest-api/use-api-key/get-order-book.md)
- [获取估算 TRX (Estimate TRX)](https://docs.tronsave.io/chinese/developer/rest-api-v0/buy-on-rest-api/use-api-key/use-signed-transaction.md)
- [购买能源](https://docs.tronsave.io/chinese/developer/rest-api-v0/buy-on-rest-api/use-api-key/buy-energy.md)
- [获取单个订单详情](https://docs.tronsave.io/chinese/developer/rest-api-v0/buy-on-rest-api/use-api-key/get-one-order-details.md)
- [获取内部账户订单历史](https://docs.tronsave.io/chinese/developer/rest-api-v0/buy-on-rest-api/use-api-key/get-internal-account-order-history.md)


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