update program-state-management and serialize-instruction-data-fronte…

…nd (#369)

* refactor(): replace deprecated findProgramAddress with findProgramAddressSync

The signature '(seeds: (Buffer | Uint8Array)[], programId: PublicKey): Promise<[PublicKey, number]>' of 'web3.PublicKey.findProgramAddress' is deprecated.

Updated the code to use the recommended 'findProgramAddressSync' method for better compatibility.

* refactor(): - Improved efficiency by importing specific modules from @solana/web3.js instead of importing the entire package.
- Replaced .then() with await for better readability and async handling.
- Applied linting to maintain code consistency and clarity.
- Replaced abbreviations like tx  with more descriptive variable names for better code readability.
- Enhanced error handling using trycatch.

* refactor(): replaced .then with trycatch block

* refactor(): replaced .then with trycatch block

* chore(): added updated link to the new movie application frontend and included the application screenshot

* chore(): implemented getExplorerLink from solana-developer/helpers

* chore(): updated url for movie review frontend repo

* chore(): updated program review application url and course reference link

* chore(): updated serialize-instruction-data file with current implementation

* fixed PR review changes

* chore(): fixed all issues in the PR review

* chore(): removed unnecessary imports

* updated code snippet and course links

* chore(): updated example project url links, course links buffer methods. also removed unused imports

* chore(): removed single letter and replaced with full names

* chore(): made changes as requested in the pr review

* fixed pr issues

* chore(): fixed pr issues

* chore(): included checks for character limit

* chore(): changed repo link to updated example project

---------

Co-authored-by: Onyewuchi Emeka <marrnuel123@.com>

content/courses/native-onchain-development/program-state-management.md

@@ -542,19 +542,21 @@ You're now ready to build and deploy your program!
 
 You can test your program by submitting a transaction with the right instruction
 data. For that, feel free to use
-[this script](https://github.com/Unboxed-Software/solana-movie-client) or
-[the frontend](https://github.com/Unboxed-Software/solana-movie-frontend) we
+[this script](https://github.com/solana-developers/movie-review-program-client)
+or [the frontend](https://github.com/solana-developers/movie-review-frontend) we
 built in the
-[Deserialize Custom Instruction Data lesson](deserialize-custom-data). In both
-cases, make sure you copy and paste the program ID for your program into the
-appropriate area of the source code to make sure you're testing the right
+[Deserialize Custom Instruction Data lesson](/content/courses/native-onchain-development/deserialize-custom-data-frontend.md).
+In both cases, set the program ID for your program in the appropriate file
+`web/components/ui/review-form.ts` to make sure you're testing the right
 program.
 
-If you use the frontend, simply replace the `MOVIE_REVIEW_PROGRAM_ID` in both
-the `MovieList.tsx` and `Form.tsx` components with the address of the program
-you've deployed. Then run the frontend, submit a view, and refresh the browser
-to see the review.
+- If you're using the script, simply replace the value assigned to
+  `movieProgramId` in the `index.ts` component with the public key of the
+  program you've deployed.
+- If you use the frontend, simply replace the `MOVIE_REVIEW_PROGRAM_ID` in the
+  `review-form.tsx` components with the address of the program you’ve deployed.
 
+Then run the frontend, submit a view, and refresh the browser to see the review.
 If you need more time with this project to feel comfortable with these concepts,
 have a look at the
 [solution code](https://beta.solpg.io/66d67f31cffcf4b13384d334) before
@@ -578,7 +580,7 @@ taking a name a short message as instruction data, the program should:
    string in each account
 
 You can test your program by building the
-[frontend](https://github.com/Unboxed-Software/solana-student-intros-frontend)
+[frontend](https://github.com/solana-developers/solana-student-intro-frontend)
 we created in the
 [Page, Order, and Filter Program Data lesson](/content/courses/native-onchain-development/paging-ordering-filtering-data-frontend).
 Remember to replace the program ID in the frontend code with the one you've

content/courses/native-onchain-development/serialize-instruction-data-frontend.md

@@ -354,30 +354,69 @@ Now that we have the buffer layout set up, let’s create a method in `Movie`
 called `serialize()` that will return a `Buffer` with a `Movie` object’s
 properties encoded into the appropriate layout.
 
+Instead of allocating a fixed buffer size, we'll calculate the size dynamically
+using known constants for the space required by each field in the `Movie`
+object. Specifically, we'll use `INIT_SPACE` (to account for string length
+metadata) and `ANCHOR_DISCRIMINATOR` (to account for the 8-byte discriminator
+used by Anchor).
+
 ```typescript
-import * as borsh from '@coral-xyz/borsh'
+import * as borsh from "@coral-xyz/borsh";
+
+// Constants for size calculations
+const ANCHOR_DISCRIMINATOR = 8; // 8 bytes for the account discriminator used by Anchor
+const STRING_LENGTH_SPACE = 4; // 4 bytes to store the length of each string
+
+// Specific sizes for 'title' and 'description' strings
+const TITLE_SIZE = 100; // Allocate 100 bytes for the 'title'
+const DESCRIPTION_SIZE = 500; // Allocate 500 bytes for the 'description'
+
+// Total space calculation for the Movie review structure
+const MOVIE_REVIEW_SPACE =
+  ANCHOR_DISCRIMINATOR + // 8 bytes for the account discriminator
+  STRING_LENGTH_SPACE +
+  TITLE_SIZE + // 4 bytes for the title length + 100 bytes for the title
+  STRING_LENGTH_SPACE +
+  DESCRIPTION_SIZE + // 4 bytes for the description length + 500 bytes for the description
+  1 + // 1 byte for 'variant'
+  1; // 1 byte for 'rating'
 
 export class Movie {
   title: string;
   rating: number;
   description: string;
 
-  ...
+  constructor(title: string, rating: number, description: string) {
+    // Enforce specific sizes for title and description
+    if (title.length > TITLE_SIZE) {
+      throw new Error(`Title cannot exceed ${TITLE_SIZE} characters.`);
+    }
+    if (description.length > DESCRIPTION_SIZE) {
+      throw new Error(
+        `Description cannot exceed ${DESCRIPTION_SIZE} characters.`,
+      );
+    }
+
+    this.title = title;
+    this.rating = rating;
+    this.description = description;
+  }
 
   borshInstructionSchema = borsh.struct([
-    borsh.u8('variant'),
-    borsh.str('title'),
-    borsh.u8('rating'),
-    borsh.str('description'),
-  ])
+    borsh.u8("variant"),
+    borsh.str("title"),
+    borsh.u8("rating"),
+    borsh.str("description"),
+  ]);
 
   serialize(): Buffer {
     try {
-      const buffer = Buffer.alloc(1000);
+      // Allocate a buffer with the exact space needed
+      const buffer = Buffer.alloc(MOVIE_REVIEW_SPACE);
       this.borshInstructionSchema.encode({ ...this, variant: 0 }, buffer);
       return buffer.subarray(0, this.borshInstructionSchema.getSpan(buffer));
     } catch (error) {
-      console.error('Serialization error:', error);
+      console.error("Serialization error:", error);
       return Buffer.alloc(0);
     }
   }