[MarkFeder]

Linked issue

Fixes #785

Replaces #700, which the PR-hygiene bot closed before the issue was accepted; GitHub doesn't let the author reopen it.

What and why

Adds a Pinocchio version of tokens/token-2022/memo-transfer, which only had an Anchor one. It follows the same kit + LiteSVM + @solana-program template as the merged Token-2022 Pinocchio examples and builds on the account-extension shape from immutable-owner (#696).

The single instruction creates a Token-2022 token account with the MemoTransfer extension enabled, so every transfer into it must be preceded by a memo. The program hand-builds three CPIs:

1. CreateAccount, with space for the extension.
2. InitializeAccount3 (variant 18): [18] + owner(32).
3. EnableRequiredMemoTransfers: MemoTransferExtension (30), sub-instruction Enable (0) → [30, 0].

Unlike ImmutableOwner, this extension is enabled after the account is initialized, and the enable must be signed by the account owner (the payer here). The account is 171 bytes: 165 base + 1 account-type byte + a 5-byte MemoTransfer TLV.

The JS dependencies match the versions #765 set for the other non-anchor examples.

Testing

pnpm install --frozen-lockfile, tsc --noEmit, pnpm build, pnpm build-and-test and pnpm audit in a Linux container, plus cargo fmt --check, cargo clippy -D warnings and prettier --check:

Token-2022 Memo Transfer (Pinocchio)
  ✔ Creates a Token-2022 token account with required memo transfers enabled
  ✔ Requires a memo on incoming transfers
2 passing
No known vulnerabilities found

The first test decodes the account with the official Token-2022 codec and checks the program owner, size, mint, token owner and requireIncomingTransferMemos. The second checks that a transfer without a memo is rejected and the same transfer with a memo moves the balance.

bash cicd.sh and pnpm run deploy both name token_2022_memo_transfer_pinocchio_program.so, the file cargo build-sbf writes; checked in Linux with a real build (same check as #794). The name is explicit rather than a *.so glob because pnpm runs scripts through cmd.exe on Windows, which doesn't expand globs.

AI disclosure

Check exactly one. See CONTRIBUTING.md.

• No AI tooling was used beyond editor autocomplete.
• AI tooling was used. Tool and extent: Claude Code helped write the program, the tests and this description; I reviewed the changes and the build and test results.

[greptile-apps]

Confidence Score: 5/5

[Medium impact] The PR appears safe to merge; no blocking issues remain from this review.

Summary

Adds a Pinocchio example that creates a Token-2022 account with MemoTransfer enabled.

• Pinocchio can create Token-2022 accounts that require memos for incoming transfers.

_{Reviews (3) · Last reviewed commit: "token-2022 memo-transfer pinocchio: depl..." · Reviewed by Greptile}

[MarkFeder]

@dev-jodee #792 and #793 only fail build-and-test-group-7, on transfer-hook/block-list/pinocchio (Command "tsc" not found), which fails the same way on main. Its package.json is missing typescript; adding "typescript": "^7.0.2" to devDependencies (+ lockfile) fixes it, verified locally. I can't open a PR for it under the 3-PR limit. #794 is green, and all three link accepted issues with review comments addressed.