Documented the exchange interface.

src/index.ts

@@ -1,9 +1,23 @@
 import { PortfolioProvider } from "./interface/portfolio";
 import { QuoteProvider } from "./interface/quote";
 
+/**
+ * Represents an exchange, which provides access to a portfolio provider and a quote provider.
+ */
 export interface Exchange {
+
+    /**
+     * The portfolio provider for the exchange.
+     */
     readonly portfolioProvider: PortfolioProvider;
+
+    /**
+     * The quote provider for the exchange.
+     */
     readonly quoteProvider: QuoteProvider;
 
+    /**
+     * The name of the exchange.
+     */
     readonly name: string;
-}
+}

src/interface/portfolio.ts

@@ -1,17 +1,62 @@
+/**
+ * Represents a financial position in a portfolio.
+ */
 export class Position {
+    /**
+     * The price of the last trade made for this position.
+     */
     readonly lastTrade: number;
+
+    /**
+     * The date and time of the last trade made for this position.
+     */
     readonly lastTradeTime: Date;
-    
+
+    /**
+     * The change in the position value.
+     */
     readonly change: number;
+
+    /**
+     * The percentage change in the position value.
+     */
     readonly changePercent: number;
 
+    /**
+     * The earnings per share of the position.
+     */
     readonly earningsPerShare: number;
 
+    /**
+     * The market capitalization of the position.
+     */
     readonly marketCap: number;
 
+    /**
+     * The symbol of the position.
+     */
     readonly symbol: string;
 
-    constructor(lastTrade: number, lastTradeTime: Date, change: number, changePercent: number, earningsPerShare: number, marketCap: number, symbol: string) {
+    /**
+     * Represents a position in a portfolio.
+     * @constructor
+     * @param {number} lastTrade - The price of the last trade made for this position.
+     * @param {Date} lastTradeTime - The date and time of the last trade made for this position.
+     * @param {number} change - The change in the position value.
+     * @param {number} changePercent - The percentage change in the position value.
+     * @param {number} earningsPerShare - The earnings per share of the position.
+     * @param {number} marketCap - The market capitalization of the position.
+     * @param {string} symbol - The symbol of the position.
+     */
+    constructor(
+        lastTrade: number,
+        lastTradeTime: Date,
+        change: number,
+        changePercent: number,
+        earningsPerShare: number,
+        marketCap: number,
+        symbol: string
+    ) {
         this.lastTrade = lastTrade;
         this.lastTradeTime = lastTradeTime;
         this.change = change;
@@ -22,14 +67,33 @@ export class Position {
     }
 }
 
+/**
+ * Represents a portfolio of financial positions.
+ */
 export class Portfolio {
+    /**
+     * An array of positions held in the portfolio.
+     */
     readonly positions: Position[];
 
+    /**
+     * Creates a new Portfolio instance.
+     * @constructor
+     * @param {Position[]} positions - An array of Position objects representing the positions in the portfolio.
+     */
     constructor(positions: Position[]) {
         this.positions = positions;
     }
 }
 
+/**
+ * A provider for fetching a portfolio.
+ */
 export interface PortfolioProvider {
+
+    /**
+     * Fetches the portfolio.
+     * @returns A promise that resolves with the fetched portfolio.
+     */
     readonly fetchPortfolio: () => Promise<Portfolio>;
 }

src/interface/quote.ts

@@ -1,14 +1,48 @@
+/**
+ * Represents a stock quote.
+ */
 export class Quote {
+    /**
+     * The name of the company associated with this quote.
+     */
     readonly companyName: string;
 
+    /**
+     * The earnings per share of a company.
+     */
     readonly earningsPerShare: number;
+
+    /**
+     * The estimated earnings for a stock.
+     */
     readonly estimatedEarnings: number;
 
+    /**
+     * The price of the last trade for the security.
+     */
     readonly lastTrade: number;
 
+    /**
+     * The symbol of the financial instrument being quoted.
+     */
     readonly symbol: string;
 
-    constructor(companyName: string, earningsPerShare: number, estimatedEarnings: number, lastTrade: number, symbol: string) {
+    /**
+     * Represents a quote for a particular stock.
+     * @constructor
+     * @param {string} companyName - The name of the company associated with the stock.
+     * @param {number} earningsPerShare - The earnings per share for the stock.
+     * @param {number} estimatedEarnings - The estimated earnings for the stock.
+     * @param {number} lastTrade - The last trade price for the stock.
+     * @param {string} symbol - The symbol for the stock.
+     */
+    constructor(
+        companyName: string,
+        earningsPerShare: number,
+        estimatedEarnings: number,
+        lastTrade: number,
+        symbol: string
+    ) {
         this.companyName = companyName;
         this.earningsPerShare = earningsPerShare;
         this.estimatedEarnings = estimatedEarnings;
@@ -17,6 +51,15 @@ export class Quote {
     }
 }
 
+/**
+ * A provider for fetching stock quotes.
+ */
 export interface QuoteProvider {
+
+    /**
+     * Fetches a quote for the given stock symbol.
+     * @param symbol The stock symbol to fetch the quote for.
+     * @returns A Promise that resolves to a Quote object.
+     */
     readonly fetchQuote: (symbol: string) => Promise<Quote>;
 }