add accountinfo <> encodedaccount compat helpers

compat-helpers/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@tensor-foundation/compat-helpers",
-  "version": "1.0.0-beta.1",
+  "version": "1.0.0-beta.2",
   "description": "Helper functions to make old web3.js programs compatible with web3.js-next modules",
   "sideEffects": false,
   "module": "./dist/src/index.mjs",

compat-helpers/src/accounts.ts

@@ -0,0 +1,38 @@
+import { AccountInfo, PublicKey } from '@solana/web3.js';
+import {
+  type EncodedAccount,
+  type Address,
+  lamports,
+  Lamports,
+} from '@solana/web3.js-next';
+
+export function fromAccountInfoToEncodedAccount<
+  TAddress extends string = string,
+>(address: PublicKey, account: AccountInfo<Buffer>): EncodedAccount<TAddress> {
+  return {
+    address: address.toString() as Address<TAddress>,
+    data: new Uint8Array(account.data),
+    executable: account.executable,
+    lamports: lamports(BigInt(account.lamports)),
+    programAddress: account.owner.toString() as Address,
+  };
+}
+
+export function fromEncodedAccountToAccountInfo<
+  TAddress extends string = string,
+>(account: EncodedAccount<TAddress>): AccountInfo<Buffer> {
+  return {
+    executable: account.executable,
+    owner: new PublicKey(account.programAddress),
+    lamports: lamportsToNumber(account.lamports),
+    data: Buffer.from(account.data),
+  };
+}
+
+function lamportsToNumber(lamportsValue: Lamports): number {
+  const num = Number(lamportsValue);
+  if (!Number.isSafeInteger(num)) {
+    throw new Error('Lamports value too large to convert to number safely');
+  }
+  return num;
+}