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* PostMessage type definitions for Klarna single-iframe integration\n */\n\n// Payment request state (from Klarna SDK)\nexport interface PaymentRequestState {\n id?: string;\n state?: string;\n stateContext?: {\n paymentToken?: string;\n };\n}\n\n// Message: Iframe -> Parent (button rendered, report dimensions)\nexport interface ButtonReadyMessage {\n action: \"button-ready\";\n width: number;\n height: number;\n}\n\n// Message: Iframe -> Parent (expand iframe to fullscreen)\nexport interface ExpandIframeMessage {\n action: \"expand-iframe\";\n}\n\n// Message: Iframe -> Parent (shrink iframe back to button size)\nexport interface ShrinkIframeMessage {\n action: \"shrink-iframe\";\n}\n\n// Message: Iframe -> Parent (payment complete)\nexport interface PaymentCompleteMessage {\n action: \"payment-complete\";\n payload: PaymentRequestState;\n}\n\n// Message: Iframe -> Parent (payment aborted)\nexport interface PaymentAbortMessage {\n action: \"payment-abort\";\n payload: PaymentRequestState;\n}\n\n// Message: Polling iframe -> Klarna iframe (polling complete)\nexport interface PollingCompleteMessage {\n action: \"polling-complete\";\n sessionId: string;\n}\n\n// Message: Polling iframe -> Klarna iframe (polling error)\nexport interface PollingErrorMessage {\n action: \"polling-error\";\n sessionId: string;\n error: string;\n}\n\n// Union type for all message types\nexport type KlarnaPostMessage =\n | ButtonReadyMessage\n | ExpandIframeMessage\n | ShrinkIframeMessage\n | PaymentCompleteMessage\n | PaymentAbortMessage\n | PollingCompleteMessage\n | PollingErrorMessage;\n\n// Type guard functions\nexport function isButtonReadyMessage(\n msg: unknown,\n): msg is ButtonReadyMessage {\n return (msg as ButtonReadyMessage)?.action === \"button-ready\";\n}\n\nexport function isExpandIframeMessage(\n msg: unknown,\n): msg is ExpandIframeMessage {\n return (msg as ExpandIframeMessage)?.action === \"expand-iframe\";\n}\n\nexport function isShrinkIframeMessage(\n 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\"Content-Type\": \"text/html\" },\n });\n}\n","children",[],[73],"f54e8f72-00e9-11f1-a3d1-42dde27851f2","deno.json","f54e904e-00e9-11f1-a3d1-42dde27851f2",10,["D",1770114026808],"{\n \"$schema\": \"https://raw.githubusercontent.com/denoland/deno/98f62cee78e85bfc47c62ed703777c6bc8794f1c/cli/schemas/config-file.v1.json\",\n \"lock\": false,\n \"compilerOptions\": {\n \"noImplicitAny\": false,\n \"strict\": true,\n \"types\": [\"https://www.val.town/types/valtown.d.ts\"],\n \"lib\": [\n \"dom\",\n \"dom.iterable\",\n \"dom.asynciterable\",\n \"deno.ns\",\n \"deno.unstable\"\n ]\n },\n \"lint\": {\n \"include\": [\"deno:/https/esm.town/**/*\"],\n \"rules\": {\n \"exclude\": [\"no-explicit-any\"]\n }\n },\n \"node_modules_dir\": false,\n \"experimental\": {\n \"unstable-node-globals\": true,\n \"unstable-temporal\": true,\n \"unstable-worker-options\": true,\n \"unstable-sloppy-imports\": true\n }\n}",[],[84],"dd78a232-1180-11f1-908f-42dde27851f2","CLAUDE.md","b5798410-117e-11f1-bf22-42dde27851f2",51,["D",1771938059261],1,"# CLAUDE.md\n\nThis file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.\n\n## Project Overview\n\nThis is a **Val Town project** — a Klarna payment integration prototype demonstrating iframe-based payment flows for the JPM (J.P. Morgan) partnership. It runs on the Val Town platform (Deno serverless runtime, not Node.js).\n\n## Running the Project\n\nThis project is deployed and run via Val Town. Locally, use the `vt` CLI:\n\n```bash\nvt dev # Start local dev server\nvt push # Deploy to Val Town\nvt pull # Pull latest from Val Town\n```\n\nThe project has a `.vt/state.json` that tracks the Val Town project ID and branch.\n\n## Architecture\n\nThe app uses a **single-iframe architecture** for Klarna payment integration:\n\n1. **`main.ts`** — HTTP request handler (Val Town entry point). Serves static files from `frontend/` and `shared/` using Val Town's `serveFile`/`readFile` utilities.\n\n2. **`frontend/index.html`** — First-party merchant page. Embeds a single `\n \n \n\n \n

Payment Status

\n \nWaiting for payment...\n

\n \n\n \n \n\n",[],[124,161],"417fc71e-23c5-11f1-ac96-42dde27851f2","first-party-demo.html","9239fafa-23b4-11f1-ae80-42dde27851f2",101,["D",1773946553946],"\n\n \n \n \n First-Party Context Demo — Klarna Web SDK\n \n \n \n \n \n \n

\n First-Party Context Demo\n

\n This page loads the Klarna Web SDK directly — no\n iframes. The payment button renders in the partner's first-party\n context.\n

\n\n \n

\n How it works:\n

\n Web SDK is initialized directly on this page — no iframe container.\n
\n initiationMode: \"ON_PAGE\"\n opens the payment popup while keeping this page intact.\n
\n Returning false from\n on(\"complete\")\n prevents the SDK from redirecting the window.\n

\n\n \n

\n Payment Button\n

\n\n \n

\n Payment Status\n

\n Waiting for payment...\n

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