Support EVM signing: Add typescript [1/N]

[janjakubnanista]

In this PR

Adding TypeScript to export-and-sign to improve the dev experience before we add new functionality.

https://linear.app/turnkey/issue/REQ-418/export-and-sign-add-support-for-evm

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	@​swc/​register@​0.1.10
	@​types/​node@​26.1.1
	ts-node@​10.9.2
	typescript@​5.9.3 ⏵ 5.4.3	+1		+1	-3
	ts-loader@​9.6.2

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[Copilot]

Pull request overview

This PR introduces TypeScript support to the export-and-sign frame to improve developer experience ahead of planned EVM signing work.

Changes:

• Switch webpack entrypoint to TypeScript and add TS compilation via ts-loader.
• Add TypeScript project configuration (tsconfig.json) plus minimal ambient typings for CSS imports.
• Add Jest config (TS) and update dependencies / rebuild committed dist artifacts.

Reviewed changes

Copilot reviewed 5 out of 14 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
export-and-sign/webpack.config.ts	Moves webpack config to TS, changes entry to src/index.ts, and adds ts-loader + TS extensions.
export-and-sign/tsconfig.json	Introduces TypeScript compiler configuration for the package.
export-and-sign/src/index.ts	Converts entry to TS, adjusts module import to extensionless ./event-handlers, and adds global typing for window.TKHQ.
export-and-sign/src/globals.d.ts	Adds ambient module declaration for *.css imports.
export-and-sign/src/event-handlers.ts	Adds an EVM transaction-type branch in signing logic (currently a Solana copy).
export-and-sign/package.json	Adds TS-related tooling dependencies (typescript, ts-loader, ts-node, etc.).
export-and-sign/package-lock.json	Lockfile updates corresponding to dependency changes.
export-and-sign/jest.config.ts	Adds a Jest configuration file in TypeScript.
export-and-sign/dist/index.html	Updates built HTML output to reference newly built bundles.
export-and-sign/dist/bundle.e56c39bc6a2a3cd0b44a.js	Newly generated production bundle.
export-and-sign/dist/bundle.e56c39bc6a2a3cd0b44a.js.map	Source map for the new production bundle.
export-and-sign/dist/bundle.e56c39bc6a2a3cd0b44a.js.LICENSE.txt	License file for the new bundle.
export-and-sign/dist/bundle.539e9a91965e314c7b7e.js	Removes an older generated bundle.

Files not reviewed (1)

• export-and-sign/package-lock.json: Generated file

Comments suppressed due to low confidence (2)

export-and-sign/src/event-handlers.ts:258

• The new "EVM" signing branch is currently just a copy of the Solana path: it deserializes with Solana's VersionedTransaction and signs with a Solana Keypair. This will produce an invalid EVM signature/transaction and is unsafe to ship as "EVM" support. If EVM signing isn't implemented yet in this PR, it should fail fast rather than returning a misleading signed payload.
  export-and-sign/src/index.ts:6
• This file now exports from "./event-handlers" (TS), but the repo still has at least one consumer importing "./src/event-handlers.js" (see export-and-sign/index.test.js). Since src/event-handlers.js no longer exists, Jest will fail module resolution. Update the test imports (and any other callers) or add a small src/event-handlers.js shim that re-exports from the TS module.

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