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This file is never touched by the build system, and can be created manually or automatically. It can contain all the options which matter for the given application and are different from the default ones. The format is the same as that of the sdkconfig file. Otherwise, the file can be generated automatically by running the idf. Once sdkconfig. Project build targets will automatically create sdkconfig file, populated with the settings from sdkconfig.

Note that the build process will not override settings that are already in sdkconfig by ones from sdkconfig. For more information, see Custom Sdkconfig Defaults. The prefix length is currently set to at least 3 characters. The indentation style is 4 characters created by spaces. All sub-items belonging to a parent item are indented by one level deeper.

For example, menu is indented by 0 characters, the config inside of the menu by 4 characters, the help of the config by 8 characters and the text of the help by 12 characters. No trailing spaces are allowed at the end of the lines. The maximum length of options is set to 40 characters. We do this so that we can defend against reentrancy attacks. You can read more about them here. First, let's dive into the contract variables: - Counters. Next, we'll go over the functions that will alter state: - listNft is called when a user first mints and lists their NFT.

It transfers ownership from the user over to the Marketplace contract. The buyer becomes the new owner of the NFT, the token is transferred from the buyer to the seller, and the listing fee is given to the marketplace owner. Finally, the query functions are relatively straightforward: getListingFee returns the listing fee. This is entirely optional.

Note that previously, Truffle also required a separate Migrations. Each has its own advantages, and you can check out v7's coolest features here. In this example, we'll be using the GUI. Open it up, create a workspace, and hit save! Now, just run truffle migrate --network development in the CLI from the nft-marketplace folder. This will compile and deploy your contracts. You should see output similar to this: Compiling your contracts Let's write a script that will execute all of our different functions.

First, create a new file under a new scripts folder called run.

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