refactor: use BorshClass for DRYer classes

packages/governance-sdk/src/chat/accounts.ts

@@ -1,5 +1,6 @@
 import { PublicKey } from '@solana/web3.js';
 import BN from 'bn.js';
+import { BorshClass } from '../tools/borsh';
 
 export const GOVERNANCE_CHAT_PROGRAM_ID = new PublicKey(
   'gCHAtYKrUUktTVzE4hEnZdLV4LXrdBf6Hh9qMaJALET',
@@ -21,36 +22,20 @@ export enum ChatMessageBodyType {
   Reaction = 1,
 }
 
-export class ChatMessageBody {
+export interface ChatMessageBody {
   type: ChatMessageBodyType;
   value: string;
-
-  constructor(args: { type: ChatMessageBodyType; value: string }) {
-    this.type = args.type;
-    this.value = args.value;
-  }
 }
+export class ChatMessageBody extends BorshClass<ChatMessageBody> {}
 
-export class ChatMessage {
-  accountType = GovernanceChatAccountType.ChatMessage;
-
+interface ChatMessageProps {
   proposal: PublicKey;
   author: PublicKey;
   postedAt: BN;
-  replyTo: PublicKey | undefined;
+  replyTo?: PublicKey;
   body: ChatMessageBody;
-
-  constructor(args: {
-    proposal: PublicKey;
-    author: PublicKey;
-    postedAt: BN;
-    replyTo: PublicKey | undefined;
-    body: ChatMessageBody;
-  }) {
-    this.proposal = args.proposal;
-    this.author = args.author;
-    this.postedAt = args.postedAt;
-    this.replyTo = args.replyTo;
-    this.body = args.body;
-  }
+}
+export interface ChatMessage extends ChatMessageProps {}
+export class ChatMessage extends BorshClass<ChatMessageProps> {
+  accountType = GovernanceChatAccountType.ChatMessage;
 }

packages/governance-sdk/src/tools/borsh.ts

@@ -102,3 +102,9 @@ export function deserializeBorsh(
   const reader = new BinaryReader(buffer);
   return deserializeStruct(schema, classType, reader);
 }
+
+export abstract class BorshClass<T> {
+  constructor(args: T) {
+    Object.assign(this, args);
+  }
+}