diff --git a/packages/library-legacy-sham/src/index.ts b/packages/library-legacy-sham/src/index.ts
index 6a5585569d0e..8060ec795043 100644
--- a/packages/library-legacy-sham/src/index.ts
+++ b/packages/library-legacy-sham/src/index.ts
@@ -1,4 +1,9 @@
 export * from './public-key';
 
 export const LAMPORTS_PER_SOL = 1_000_000_000;
+export const MAX_SEED_LENGTH = 32;
+export const NONCE_ACCOUNT_LENGTH = 80;
+export const PACKET_DATA_SIZE = 1280 - 40 - 8;
+export const PUBLIC_KEY_LENGTH = 32;
 export const SIGNATURE_LENGTH_IN_BYTES = 64;
+export const VERSION_PREFIX_MASK = 0x7f;