token-2022 interest-bearing: add pinocchio example

Ports the interest-bearing Token-2022 example to Pinocchio (the anchor
example has no native sibling), matching the token-2022 pinocchio template
(kit + litesvm, official @solana-program packages, real Rent::get()).

The program hand-rolls three Token-2022 CPIs to create a mint with the
InterestBearingConfig extension: it initializes the rate config to 0% before
InitializeMint, then (mirroring the anchor example) updates it to 1% via
UpdateRate, which the rate authority signs. The payer is the rate authority.
Unlike a COption, the rate authority is an OptionalNonZeroPubkey (a bare
32-byte key, no tag byte), and the rate is a signed i16. Mint size is 222
bytes (a 52-byte InterestBearingConfig TLV value). The litesvm test decodes
the mint with the official Token-2022 codec and asserts the rate authority
and the current 1% rate.

Author: MarkFeder

Cargo.lock

@@ -69,6 +69,7 @@ members = [
     "tokens/token-2022/transfer-fee/native/program",
     "tokens/token-2022/transfer-fee/pinocchio/program",
     "tokens/token-2022/multiple-extensions/native/program",
+    "tokens/token-2022/interest-bearing/pinocchio/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/interest-bearing/pinocchio/cicd.sh

@@ -0,0 +1,25 @@
+{
+  "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",
+    "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"
+  }
+}