Step 2: Update the lib.rs File with Smart Contract Code

In this step, you'll define the functionality for NFT minting within your project by updating the lib.rs file with provided Rust code. This smart contract code includes the structure and logic necessary for creating NFTs.

Instructions

1. Access the lib.rs File:

   • Use Visual Studio Code to navigate to programs/nftminter/src/ in your project's directory.

   • Open the lib.rs file. Initially, this contains Anchor's default scaffolded code.

2. Update the File with Provided Code:

   • Erase the existing content and insert the following example code or your own code:

     use anchor_lang::prelude::*;
     use anchor_spl::token::{self, MintTo, Token, TokenAccount};
     
     declare_id!("28yv9AxVwUtw1HtDYin7JS3F3x1Z2G9cqAdowUb3iCs6");
     
     #[program]
     pub mod nftminter {
         use super::*;
         pub fn mint_nft(ctx: Context<MintNft>, name: String, description: String, image_uri: String) -> Result<()> {
             let nft_info = &mut ctx.accounts.nft_info;
             nft_info.name = name;
             nft_info.description = description;
             nft_info.image_uri = image_uri;
             Ok(())
         }
     }
     
     #[derive(Accounts)]
     pub struct MintNft<'info> {
         #[account(init, payer = user, space = 1024)]
         pub nft_info: Account<'info, NftInfo>,
         #[account(mut)]
         pub user: Signer<'info>,
         pub system_program: Program<'info, System>,
     }
     
     #[account]
     pub struct NftInfo {
         pub name: String,
         pub description: String,
         pub image_uri: String,
     }

   • This code establishes the functionality for your NFT minter, including the mint_nft function and the NftInfo structure to hold NFT metadata

3. Key Components Overview:

   • The use statements bring necessary modules into scope.

   • declare_id! uniquely identifies your smart contract on the blockchain.

   • The #[program] attribute and subsequent module define the contract's executable functions.

   • #[derive(Accounts)] specifies the accounts context required for the mint_nft function.

   • NftInfo struct holds the NFT's metadata.

If you already have your own code that differs from this NFT example, feel free to paste that instead.

Next Steps

• With the smart contract code in place, you're set to further develop, test, and eventually deploy your NFT minter.