feat: add TransferChecked (discriminator 12) to TypeScript SDK

[tilo-14]

Summary

• Adds createLightTokenTransferCheckedInstruction (discriminator 12, 10-byte data: disc + u64 LE amount + u8 decimals, 4 accounts: source/mint/dest/authority)
• Adds createTransferInterfaceInstruction and createTransferInterfaceCheckedInstruction as interface-level routers that dispatch to light-token, SPL, or T22
• Adds transferInterfaceChecked high-level action with decimals parameter
• Adds checkedDecimals option to TransferOptions for instruction-level control
• Exports all new functions from index.ts and unified/index.ts

Based on #2271 — TypeScript-only subset adapted to current naming (LIGHT_TOKEN_PROGRAM_ID, createLightTokenTransferInstruction).

Test plan

• pnpm build succeeds in js/compressed-token
• Generated .d.ts includes all new exports
• Unit tests: instruction account layout, data encoding (disc=12, amount, decimals), interface routing
• E2e tests: hot balance checked transfer, wrong decimals rejection, cold auto-load checked transfer

[coderabbitai]

Important

Review skipped

Review was skipped due to path filters

⛔ Files ignored due to path filters (5)

• js/compressed-token/src/index.ts is excluded by none and included by none
• js/compressed-token/src/v3/actions/transfer-interface.ts is excluded by none and included by none
• js/compressed-token/src/v3/instructions/transfer-interface.ts is excluded by none and included by none
• js/compressed-token/src/v3/unified/index.ts is excluded by none and included by none
• js/compressed-token/tests/e2e/transfer-interface.test.ts is excluded by none and included by none

CodeRabbit blocks several paths by default. You can override this behavior by explicitly including those paths in the path filters. For example, including **/dist/** will override the default block on the dist directory, by removing the pattern from both the lists.

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch feat/transfer-checked-ts

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}