Add export for post message layout with deserialize fn (#497)

Author: barnjamin

platforms/solana/protocols/core/src/index.ts

@@ -7,3 +7,4 @@ registerProtocol(_platform, 'WormholeCore', SolanaWormholeCore);
 export * from './core.js';
 export * from './types.js';
 export * as utils from './utils/index.js';
+export * from './postMessageLayout.js';

platforms/solana/protocols/core/src/postMessageLayout.ts

@@ -1,5 +1,9 @@
 import type { Layout } from '@wormhole-foundation/sdk-connect';
-import { layoutItems } from '@wormhole-foundation/sdk-connect';
+import {
+  LayoutToType,
+  deserializeLayout,
+  layoutItems,
+} from '@wormhole-foundation/sdk-connect';
 
 /** Binary layout for postMessage account */
 export const postMessageLayout = [
@@ -16,3 +20,9 @@ export const postMessageLayout = [
   { name: 'payloadLength', binary: 'uint', size: 4, endianness: 'little' },
   { name: 'payload', binary: 'bytes' },
 ] as const satisfies Layout;
+
+export function deserializePostMessage(
+  data: Uint8Array,
+): LayoutToType<typeof postMessageLayout> {
+  return deserializeLayout(postMessageLayout, data);
+}