Add comments.

src/contracts/NFT.ts

@@ -30,6 +30,7 @@ export class Nft extends SmartContract {
    * @param {String} feeToken address of the token marketplace wants to add fee on top
    * @param {String} feeAmount amount of feeToken to be transferred to mpFeeAddress on top, will be converted to WEI
    * @param {String} cap Maximum cap (Number) - will be converted to wei
+   * @param {boolean} confidentialEVM Flag for encrypting the tx on Sapphire when deploying Datatoken template id 4
    * @param {String} name Token name
    * @param {String} symbol Token symbol
    * @param {Number} templateIndex NFT template index
@@ -45,7 +46,7 @@ export class Nft extends SmartContract {
     feeToken: string,
     feeAmount: string,
     cap: string,
-    confidentialEVM: boolean = false,
+    confidentialEVM: boolean = false, // when using datatoken template id 4, tx should be encrypted because it contains files object.
     name?: string,
     symbol?: string,
     templateIndex?: number,