add comments to everything potentially consumer facing (#3127)

* add comments to everything potentially consumer facing

* rework smtp

---------

Co-authored-by: Aiden McClelland <3732071+dr-bonez@users.noreply.github.com>

sdk/base/lib/s9pk/index.ts

@@ -12,6 +12,11 @@ import { FileContents } from './merkleArchive/fileContents'
 
 const magicAndVersion = new Uint8Array([59, 59, 2])
 
+/**
+ * Compares two `Uint8Array` instances byte-by-byte for equality.
+ *
+ * @returns `true` if both arrays have the same length and identical bytes
+ */
 export function compare(a: Uint8Array, b: Uint8Array) {
   if (a.length !== b.length) return false
   for (let i = 0; i < a.length; i++) {
@@ -20,12 +25,41 @@ export function compare(a: Uint8Array, b: Uint8Array) {
   return true
 }
 
+/**
+ * Represents a parsed `.s9pk` package archive — the binary distribution format for StartOS services.
+ *
+ * An `S9pk` wraps a verified {@link Manifest}, a {@link MerkleArchive} containing the package's
+ * assets (icon, license, dependency metadata), and the total archive size in bytes.
+ *
+ * @example
+ * ```ts
+ * const s9pk = await S9pk.deserialize(file, null)
+ * console.log(s9pk.manifest.id)    // e.g. "bitcoind"
+ * console.log(s9pk.size)           // archive size in bytes
+ * const icon = await s9pk.icon()   // base64 data URL
+ * const license = await s9pk.license()
+ * ```
+ */
 export class S9pk {
   private constructor(
+    /** The parsed package manifest containing metadata, dependencies, and interface definitions. */
     readonly manifest: Manifest,
+    /** The Merkle-verified archive containing the package's files. */
     readonly archive: MerkleArchive,
+    /** The total size of the archive in bytes. */
     readonly size: number,
   ) {}
+  /**
+   * Deserializes an `S9pk` from a `Blob` (e.g. a `File` from a browser file input).
+   *
+   * Validates the magic bytes and version header, then parses the Merkle archive structure.
+   * If a `commitment` is provided, the archive is cryptographically verified against it.
+   *
+   * @param source - The raw `.s9pk` file as a `Blob`
+   * @param commitment - An optional Merkle commitment to verify the archive against, or `null` to skip verification
+   * @returns A fully parsed `S9pk` instance
+   * @throws If the magic bytes are invalid or the archive fails verification
+   */
   static async deserialize(
     source: Blob,
     commitment: MerkleArchiveCommitment | null,
@@ -57,6 +91,14 @@ export class S9pk {
 
     return new S9pk(manifest, archive, source.size)
   }
+  /**
+   * Extracts the package icon from the archive and returns it as a base64-encoded data URL.
+   *
+   * Looks for a file named `icon.*` with an image MIME type (e.g. `icon.png`, `icon.svg`).
+   *
+   * @returns A data URL string like `"data:image/png;base64,..."` suitable for use in `<img src>`.
+   * @throws If no icon file is found in the archive
+   */
   async icon(): Promise<DataUrl> {
     const iconName = Object.keys(this.archive.contents.contents).find(
       (name) =>
@@ -73,6 +115,12 @@ export class S9pk {
     )
   }
 
+  /**
+   * Returns the metadata (e.g. `{ title }`) for a specific dependency by its package ID.
+   *
+   * @param id - The dependency's package identifier (e.g. `"bitcoind"`)
+   * @returns The dependency metadata object, or `null` if the dependency is not present in the archive
+   */
   async dependencyMetadataFor(id: PackageId) {
     const entry = this.archive.contents.getPath([
       'dependencies',
@@ -85,6 +133,12 @@ export class S9pk {
     ) as { title: string }
   }
 
+  /**
+   * Returns the icon for a specific dependency as a base64 data URL.
+   *
+   * @param id - The dependency's package identifier
+   * @returns A data URL string, or `null` if the dependency or its icon is not present
+   */
   async dependencyIconFor(id: PackageId) {
     const dir = this.archive.contents.getPath(['dependencies', id])
     if (!dir || !(dir.contents instanceof DirectoryContents)) return null
@@ -101,6 +155,12 @@ export class S9pk {
     )
   }
 
+  /**
+   * Returns a merged record of all dependency metadata (title, icon, description, optional flag)
+   * for every dependency declared in the manifest.
+   *
+   * @returns A record keyed by package ID, each containing `{ title, icon, description, optional }`
+   */
   async dependencyMetadata() {
     return Object.fromEntries(
       await Promise.all(
@@ -119,6 +179,12 @@ export class S9pk {
     )
   }
 
+  /**
+   * Reads and returns the `LICENSE.md` file from the archive as a UTF-8 string.
+   *
+   * @returns The full license text
+   * @throws If `LICENSE.md` is not found in the archive
+   */
   async license(): Promise<string> {
     const file = this.archive.contents.getPath(['LICENSE.md'])
     if (!file || !(file.contents instanceof FileContents))