refactor(account-update.ts): move MayUseToken type and related functi…

…ons to the top-level scope

The MayUseToken type and its related functions were previously defined within the AccountUpdate class. Moving them to the top-level scope improves code organization and makes them more accessible.

The MayUseToken type is now imported from the '../../bindings/mina-transaction/transaction-leaves.js' module as BaseMayUseToken and then extended with additional properties and functions.

This change enhances code readability and maintainability by separating concerns and promoting a more modular structure.

src/lib/mina/account-update.ts

@@ -39,6 +39,7 @@ import { Memo } from '../../mina-signer/src/memo.js';
 import {
   Events as BaseEvents,
   Actions as BaseActions,
+  MayUseToken as BaseMayUseToken,
 } from '../../bindings/mina-transaction/transaction-leaves.js';
 import { TokenId as Base58TokenId } from './base58-encodings.js';
 import {
@@ -131,8 +132,6 @@ type AuthRequired = Types.Json.AuthRequired;
 type AccountUpdateBody = Types.AccountUpdate['body'];
 type Update = AccountUpdateBody['update'];
 
-type MayUseToken = AccountUpdateBody['mayUseToken'];
-
 type Events = BaseEvents;
 const Events = {
   ...BaseEvents,
@@ -158,6 +157,33 @@ const Actions = {
   },
 };
 
+type MayUseToken = BaseMayUseToken;
+const MayUseToken = {
+  ...BaseMayUseToken,
+  type: provablePure({ parentsOwnToken: Bool, inheritFromParent: Bool }),
+  No: {
+    parentsOwnToken: Bool(false),
+    inheritFromParent: Bool(false),
+  },
+  ParentsOwnToken: {
+    parentsOwnToken: Bool(true),
+    inheritFromParent: Bool(false),
+  },
+  InheritFromParent: {
+    parentsOwnToken: Bool(false),
+    inheritFromParent: Bool(true),
+  },
+  isNo: ({
+    body: {
+      mayUseToken: { parentsOwnToken, inheritFromParent },
+    },
+  }: AccountUpdate) => parentsOwnToken.or(inheritFromParent).not(),
+  isParentsOwnToken: (accountUpdate: AccountUpdate) =>
+    accountUpdate.body.mayUseToken.parentsOwnToken,
+  isInheritFromParent: (mayUseToken: AccountUpdate) =>
+    mayUseToken.body.mayUseToken.inheritFromParent,
+};
+
 /**
  * Either set a value or keep it the same.
  */
@@ -675,6 +701,7 @@ class AccountUpdate implements Types.AccountUpdate {
 
   static Actions = Actions;
   static Events = Events;
+  static MayUseToken = MayUseToken;
 
   constructor(body: Body, authorization?: Control);
   constructor(body: Body, authorization: Control = {}, isSelf = false) {
@@ -1173,34 +1200,6 @@ class AccountUpdate implements Types.AccountUpdate {
     return Provable.witnessAsync(combinedType, compute);
   }
 
-  static get MayUseToken() {
-    return {
-      type: provablePure({ parentsOwnToken: Bool, inheritFromParent: Bool }),
-      No: { parentsOwnToken: Bool(false), inheritFromParent: Bool(false) },
-      ParentsOwnToken: {
-        parentsOwnToken: Bool(true),
-        inheritFromParent: Bool(false),
-      },
-      InheritFromParent: {
-        parentsOwnToken: Bool(false),
-        inheritFromParent: Bool(true),
-      },
-      isNo({
-        body: {
-          mayUseToken: { parentsOwnToken, inheritFromParent },
-        },
-      }: AccountUpdate) {
-        return parentsOwnToken.or(inheritFromParent).not();
-      },
-      isParentsOwnToken(a: AccountUpdate) {
-        return a.body.mayUseToken.parentsOwnToken;
-      },
-      isInheritFromParent(a: AccountUpdate) {
-        return a.body.mayUseToken.inheritFromParent;
-      },
-    };
-  }
-
   /**
    * Returns a JSON representation of only the fields that differ from the
    * default {@link AccountUpdate}.