Add Token-2022 transfer-fee Pinocchio example (#653)

* token-2022 transfer-fee: add pinocchio example

Ports the transfer-fee Token-2022 example to Pinocchio, matching the
mint-close-authority template (kit + litesvm, official @solana-program
packages, real Rent::get()).

The program hand-rolls three Token-2022 CPIs to create a mint with the
TransferFeeConfig extension: it initializes the fee config to 1% before
InitializeMint, then (mirroring the native example) updates it to 10%
afterwards via SetTransferFee, which the transfer-fee config authority signs.
Both the config and withdraw-withheld authorities are set to the payer. Mint
size is 278 bytes (a 108-byte TransferFeeConfig TLV value). The litesvm test
decodes the mint with the official Token-2022 codec and asserts the stored
authorities and the newer transfer fee (10%, max 5 tokens).

* token-2022 transfer-fee pinocchio: guard fee scaling against overflow

decimals is unvalidated u8 instruction input and the workspace enables
overflow-checks, so 5 * 10^decimals would panic and abort the transaction
for large decimals (>= 19). Compute the max fee with checked_pow/checked_mul
and return a controlled ProgramError::InvalidInstructionData instead.

* token-2022 transfer-fee pinocchio: migrate to pinocchio 0.11 + prettier

Rebased onto main (pinocchio 0.10 -> 0.11): handlers take &mut [AccountView]
and CPI account-infos are passed as copies. Also apply prettier formatting to
test.ts and tsconfig.json to satisfy the repo's Prettier check.

* token-2022 transfer-fee pinocchio: switch test stack to mocha+tsx

Per #656 / AGENTS.md 'do not deviate' rule: replace ts-mocha with
'mocha --import=tsx', bump @solana/kit to ^7 and the mocha/chai/tsx/types
devDeps to match the token-2022/non-transferable reference, and align tsconfig
(noEmit, bundler resolution). Regenerated pnpm-lock.yaml. Verified: tsc --noEmit
clean and 'pnpm build-and-test' passes on the litesvm path.

---------

Co-authored-by: MarkFeder <5670736+MarkFeder@users.noreply.github.com>

Author: MarkFeder

Cargo.lock

@@ -65,6 +65,7 @@ members = [
     "tokens/token-2022/default-account-state/native/program",
     "tokens/token-2022/default-account-state/pinocchio/program",
     "tokens/token-2022/transfer-fee/native/program",
+    "tokens/token-2022/transfer-fee/pinocchio/program",
     "tokens/token-2022/multiple-extensions/native/program",
 ]
 resolver = "2"

Cargo.toml

@@ -0,0 +1,8 @@
+#!/bin/bash
+
+# This script is for quick building & deploying of the program.
+# It also serves as a reference for the commands used for building & deploying Solana programs.
+# Run this bad boy with "bash cicd.sh" or "./cicd.sh"
+
+cargo build-sbf --manifest-path=./program/Cargo.toml --sbf-out-dir=./program/target/so
+solana program deploy ./program/target/so/program.so

tokens/token-2022/transfer-fee/pinocchio/cicd.sh

@@ -0,0 +1,26 @@
+{
+  "type": "module",
+  "scripts": {
+    "test": "mocha --import=tsx -t 1000000 ./tests/test.ts",
+    "build-and-test": "cargo build-sbf --manifest-path=./program/Cargo.toml --sbf-out-dir=./tests/fixtures && pnpm test",
+    "build": "cargo build-sbf --manifest-path=./program/Cargo.toml --sbf-out-dir=./program/target/so",
+    "deploy": "solana program deploy ./program/target/so/program.so"
+  },
+  "dependencies": {
+    "@solana-program/system": "^0.12.2",
+    "@solana-program/token-2022": "^0.12.0",
+    "@solana/kit": "^7.0.0",
+    "@solana/sysvars": "^6.10.0",
+    "borsh": "^2.0.0",
+    "litesvm": "^1.3.0"
+  },
+  "devDependencies": {
+    "@types/chai": "^5.2.3",
+    "@types/mocha": "^10.0.10",
+    "@types/node": "^26.1.0",
+    "chai": "^6.2.2",
+    "mocha": "^11.7.5",
+    "typescript": "^5.9.3",
+    "tsx": "^4.19.2"
+  }
+}