# NFT Marketplace | Property | Description | Type | | ------------------------ | ---------------------------------------------------------------------------------------------- | ------ | | timestamp | The timestamp of the transfer. | number | | chain\_id | The standard id of the chain. | number | | block\_number | The block number of the transfer. | number | | transaction\_hash | The transaction hash of the transfer. | string | | log\_index | The event log. For transactions that don't emit event, create arbitrary index starting from 0. | number | | nft\_collection\_address | The contract address of the NFT collection. | string | | nft\_id | The unique identifier of the NFT. | string | | sender\_address | The address of the sender of the NFT. | string | | receiver\_address | The address of the receiver of the NFT. | string | --- # 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://docs.openblocklabs.com/data-offering/defi-canonical-data/nft-marketplace.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.