# Buy Thanks to the secure and efficient off-chain system and [*zkTrue-up*](https://docs.termstructure.com/zktrue-up), users do not pay gas fees for placing and canceling orders. ## Step 1 To buy TSB tokens, please navigate to the secondary market at the of the page. TSB token is an ERC20 token representing a fixed-income token for lenders. TSB tokens will be minted to the lenders after the auction match in the primary market. The minimum trading amount of TSB Tokens in the Secondary Market is approximately USD100. ## Step 2 Choose the type of token to buy, the maturity date, and the type of order. Then, specify the interest rate and the amount of tokens to buy.

Check the details before submitting the order.

Sign the transaction.

A message that says "Secondary limit order request sent" will appear at the bottom right of the page if the transaction is successful. ## Step 3 View the order history at the bottom of the page. If the status shows "running," it means the order is still being processed. If the status shows "completed," that means the order has been successfully matched. However, if the status shows "rejected," that means the order was not placed. Users may consider placing the order again. If needed, users can also cancel their orders.

## Transaction Status Please use the "Explorer" function, which can be found under "More," to check each transaction's status. The sequencer in zkTrue-up collects users’ transactions, batches them, and sends them to Ethereum**.** Therefore, users will need to **wait for a specific period of time** before they can observe their actions being reflected in the protocol. It is important to note that this number may be adjusted to accommodate various circumstances upon the launch of the mainnet. To learn more about the rollup services and how transactions are handled and settled, please refer to the doc at --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://tutorials.ts.finance/how-to-use-term-structure/secondary-markets/buy.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.