fix(rflows): remove Coinbase onramp, use Transak only

Coinbase CDP integration was causing 500 errors ([object Object]).
Simplify to Transak-only: remove CoinbaseOnrampProvider import/init,
provider selection UI, and popup window branch. Also fix error handler
to properly stringify non-Error objects.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

modules/rflows/components/folk-flows-app.ts

@@ -3504,31 +3504,10 @@ class FolkFlowsApp extends HTMLElement {
 	 * Prompt user for email via a modal dialog.
 	 */
 	private promptFundDetails(defaultAmount = 2): Promise<{ email: string; amount: number; label: string; provider: string } | null> {
-		return new Promise(async (resolve) => {
+		return new Promise((resolve) => {
-			// Fetch available providers
-			let availableProviders: string[] = ["transak"];
-			let defaultProvider = "transak";
-			try {
-				const base = this.getApiBase();
-				const res = await fetch(`${base}/api/onramp/config`);
-				if (res.ok) {
-					const cfg = await res.json();
-					if (cfg.available?.length) availableProviders = cfg.available;
-					defaultProvider = cfg.provider || defaultProvider;
-				}
-			} catch { /* use defaults */ }
-
 			const modal = document.createElement("div");
 			modal.style.cssText = `position:fixed;inset:0;z-index:99999;background:rgba(0,0,0,0.7);display:flex;align-items:center;justify-content:center;`;
 			const inputStyle = `width:100%;padding:10px 12px;border:1px solid var(--rflows-modal-border);border-radius:8px;font-size:14px;box-sizing:border-box;background:var(--rs-bg-surface);color:var(--rs-text-primary)`;
-			const providerOptions = availableProviders.map((p) =>
-				`<option value="${p}"${p === defaultProvider ? ' selected' : ''}>${p === 'coinbase' ? 'Coinbase (0% fee)' : 'Transak (card)'}</option>`
-			).join("");
-			const providerPicker = availableProviders.length > 1 ? `
-					<label style="display:block;margin-bottom:12px">
-						<span style="display:block;margin-bottom:4px;font-size:13px;font-weight:500;color:var(--rs-text-secondary)">Payment Provider</span>
-						<select id="fund-provider" style="${inputStyle}">${providerOptions}</select>
-					</label>` : `<input type="hidden" id="fund-provider" value="${defaultProvider}"/>`;
 
 			modal.innerHTML = `
 				<div style="background:var(--rs-bg-surface);border-radius:16px;padding:28px;width:400px;max-width:90vw">
@@ -3543,7 +3522,7 @@ class FolkFlowsApp extends HTMLElement {
 						<span style="display:block;margin-bottom:4px;font-size:13px;font-weight:500;color:var(--rs-text-secondary)">Recipient Email</span>
 						<input id="fund-email" type="email" placeholder="friend@example.com"
 							style="${inputStyle}"/>
-					</label>${providerPicker}
+					</label>
 					<label style="display:block;margin-bottom:20px">
 						<span style="display:block;margin-bottom:4px;font-size:13px;font-weight:500;color:var(--rs-text-secondary)">Label (optional)</span>
 						<input id="fund-label" type="text" placeholder="Coffee Fund"
@@ -3559,7 +3538,6 @@ class FolkFlowsApp extends HTMLElement {
 			const amountInput = modal.querySelector("#fund-amount") as HTMLInputElement;
 			const emailInput = modal.querySelector("#fund-email") as HTMLInputElement;
 			const labelInput = modal.querySelector("#fund-label") as HTMLInputElement;
-			const providerInput = modal.querySelector("#fund-provider") as HTMLInputElement | HTMLSelectElement;
 			emailInput.focus();
 
 			const cleanup = (value: { email: string; amount: number; label: string; provider: string } | null) => { modal.remove(); resolve(value); };
@@ -3569,7 +3547,7 @@ class FolkFlowsApp extends HTMLElement {
 				const amount = parseFloat(amountInput.value) || 0;
 				if (!email || !email.includes("@")) { emailInput.style.borderColor = "red"; return; }
 				if (amount <= 0) { amountInput.style.borderColor = "red"; return; }
-				cleanup({ email, amount, label: labelInput.value.trim(), provider: providerInput.value });
+				cleanup({ email, amount, label: labelInput.value.trim(), provider: "transak" });
 			};
 
 			modal.querySelector("#fund-cancel")!.addEventListener("click", () => cleanup(null));
@@ -3751,14 +3729,10 @@ class FolkFlowsApp extends HTMLElement {
 	}
 
 	/**
-	 * Open on-ramp widget. Coinbase blocks iframing (CSP frame-ancestors),
+	 * Open Transak on-ramp widget in an iframe modal.
-	 * so we open it in a popup window. Transak allows iframing.
 	 */
 	private openWidgetModal(url: string) {
-		const isCoinbase = url.includes("pay.coinbase.com") || url.includes("coinbase");
-
 		const showClaimMessage = () => {
-			// Remove any existing modal first
 			document.getElementById("onramp-modal")?.remove();
 			const successModal = document.createElement("div");
 			successModal.id = "onramp-modal";
@@ -3782,41 +3756,6 @@ class FolkFlowsApp extends HTMLElement {
 			successModal.querySelector("#onramp-done")!.addEventListener("click", () => successModal.remove());
 		};
 
-		if (isCoinbase) {
-			// Coinbase: open in popup window (CSP blocks iframing)
-			const popup = window.open(url, "coinbase-onramp", "width=460,height=700,left=200,top=100");
-
-			// Show a waiting modal
-			const modal = document.createElement("div");
-			modal.id = "onramp-modal";
-			modal.style.cssText = `position:fixed;inset:0;z-index:99999;background:rgba(0,0,0,0.7);display:flex;align-items:center;justify-content:center;`;
-			modal.innerHTML = `
-				<div style="position:relative;width:450px;border-radius:16px;overflow:hidden;background:var(--rs-bg-surface);padding:40px;text-align:center">
-					<button id="onramp-close" style="position:absolute;top:8px;right:12px;background:none;border:none;color:var(--rs-text-secondary);font-size:24px;cursor:pointer">&times;</button>
-					<div style="font-size:48px;margin-bottom:16px">&#128179;</div>
-					<h2 style="color:var(--rs-text-primary);margin-bottom:12px;font-size:20px">Complete Payment</h2>
-					<p style="color:var(--rs-text-secondary);font-size:14px;line-height:1.6;margin-bottom:24px">
-						A Coinbase payment window has opened.<br>
-						Complete your purchase there, then return here.
-					</p>
-					<button id="onramp-done" style="padding:12px 32px;background:linear-gradient(90deg,#00d4ff,#7c3aed);color:#fff;border:none;border-radius:8px;font-weight:600;font-size:15px;cursor:pointer;width:100%">I've Completed Payment</button>
-				</div>`;
-			document.body.appendChild(modal);
-			modal.querySelector("#onramp-close")!.addEventListener("click", () => { popup?.close(); modal.remove(); });
-			modal.querySelector("#onramp-done")!.addEventListener("click", () => { popup?.close(); modal.remove(); showClaimMessage(); });
-
-			// Also detect if popup closes
-			const checkClosed = setInterval(() => {
-				if (popup?.closed) {
-					clearInterval(checkClosed);
-					modal.remove();
-					showClaimMessage();
-				}
-			}, 1000);
-			return;
-		}
-
-		// Transak: use iframe (they allow it)
 		const modal = document.createElement("div");
 		modal.id = "onramp-modal";
 		modal.style.cssText = `position:fixed;inset:0;z-index:99999;background:rgba(0,0,0,0.7);display:flex;align-items:center;justify-content:center;`;
@@ -3834,7 +3773,6 @@ class FolkFlowsApp extends HTMLElement {
 		modal.addEventListener("click", (e) => { if (e.target === modal) modal.remove(); });
 
 		const handler = (e: MessageEvent) => {
-			// Transak success event
 			if (e.data?.event_id === "TRANSAK_ORDER_SUCCESSFUL") {
 				console.log("[OnRamp] Transak order successful:", e.data.data);
 				window.removeEventListener("message", handler);

modules/rflows/mod.ts

@@ -14,11 +14,9 @@ import { renderLanding } from "./landing";
 import type { SyncServer } from '../../server/local-first/sync-server';
 import { flowsSchema, flowsDocId, type FlowsDoc, type SpaceFlow, type CanvasFlow } from './schemas';
 import { demoNodes } from './lib/presets';
-import { CoinbaseOnrampProvider } from './lib/coinbase-onramp';
 import { OpenfortProvider } from './lib/openfort';
 
 let _syncServer: SyncServer | null = null;
-let _coinbaseOnramp: CoinbaseOnrampProvider | null = null;
 let _openfort: OpenfortProvider | null = null;
 
 const FLOW_SERVICE_URL = process.env.FLOW_SERVICE_URL || "http://payment-flow:3010";
@@ -172,10 +170,7 @@ routes.post("/api/flows/user-onramp", async (c) => {
 
 		if (!_openfort) return c.json({ error: "Openfort not configured" }, 503);
 
-		// Determine provider: explicit request > env default > auto-detect
+		const provider = 'transak';
-		const provider = reqProvider
-			|| process.env.ONRAMP_PROVIDER
-			|| (_coinbaseOnramp ? 'coinbase' : 'transak');
 
 		// 1. Find or create Openfort smart wallet for this user (one wallet per email)
 		const wallet = await _openfort.findOrCreateWallet(`user:${email}`, {
@@ -184,44 +179,30 @@ routes.post("/api/flows/user-onramp", async (c) => {
 		});
 
 		const sessionId = crypto.randomUUID();
-		let widgetUrl: string;
 
-		if (provider === 'coinbase') {
+		// 2. Transak: build widget URL server-side
-			// 2a. Coinbase: server-side session → widget URL
+		const transakApiKey = process.env.TRANSAK_API_KEY;
-			if (!_coinbaseOnramp) return c.json({ error: "Coinbase Onramp not configured" }, 503);
+		if (!transakApiKey) return c.json({ error: "Transak not configured" }, 503);
-			const session = await _coinbaseOnramp.createSession({
+		const transakEnv = process.env.TRANSAK_ENV || 'PRODUCTION';
-				walletAddress: wallet.address,
+		const baseUrl = transakEnv === 'PRODUCTION'
-				fiatAmount,
+			? 'https://global.transak.com'
-				fiatCurrency,
+			: 'https://global-stg.transak.com';
-				partnerUserRef: `user-${sessionId}`,
+		const params = new URLSearchParams({
-				redirectUrl: returnUrl,
+			apiKey: transakApiKey,
-			});
+			environment: transakEnv,
-			widgetUrl = session.onrampUrl;
+			cryptoCurrencyCode: 'USDC',
-		} else {
+			network: 'base',
-			// 2b. Transak: build widget URL server-side
+			defaultCryptoCurrency: 'USDC',
-			const transakApiKey = process.env.TRANSAK_API_KEY;
+			walletAddress: wallet.address,
-			if (!transakApiKey) return c.json({ error: "Transak not configured" }, 503);
+			partnerOrderId: `user-${sessionId}`,
-			const transakEnv = process.env.TRANSAK_ENV || 'PRODUCTION';
+			email,
-			const baseUrl = transakEnv === 'PRODUCTION'
+			themeColor: '6366f1',
-				? 'https://global.transak.com'
+			hideMenu: 'true',
-				: 'https://global-stg.transak.com';
+		});
-			const params = new URLSearchParams({
+		if (returnUrl) params.set('redirectURL', returnUrl);
-				apiKey: transakApiKey,
+		const widgetUrl = `${baseUrl}?${params}`;
-				environment: transakEnv,
-				cryptoCurrencyCode: 'USDC',
-				network: 'base',
-				defaultCryptoCurrency: 'USDC',
-				walletAddress: wallet.address,
-				partnerOrderId: `user-${sessionId}`,
-				email,
-				themeColor: '6366f1',
-				hideMenu: 'true',
-			});
-			if (returnUrl) params.set('redirectURL', returnUrl);
-			widgetUrl = `${baseUrl}?${params}`;
-		}
 
-		console.log(`[rflows] On-ramp session created: provider=${provider} session=${sessionId} wallet=${wallet.address}`);
+		console.log(`[rflows] On-ramp session created: provider=transak session=${sessionId} wallet=${wallet.address}`);
 
 		// Non-fatal side-effect: create fund claim → sends email via EncryptID
 		const encryptidServiceKey = process.env.ENCRYPTID_SERVICE_KEY;
@@ -260,7 +241,7 @@ routes.post("/api/flows/user-onramp", async (c) => {
 		});
 	} catch (err) {
 		console.error("[rflows] user-onramp failed:", err);
-		const message = err instanceof Error ? err.message : "Unknown error";
+		const message = err instanceof Error ? err.message : String(err);
 		return c.json({ error: message }, 500);
 	}
 });
@@ -268,13 +249,9 @@ routes.post("/api/flows/user-onramp", async (c) => {
 // ─── On-ramp config ──────────────────────────────────────
 
 routes.get("/api/onramp/config", (c) => {
-	const available: string[] = [];
-	if (process.env.COINBASE_CDP_PROJECT_ID) available.push("coinbase");
-	if (process.env.TRANSAK_API_KEY || !process.env.COINBASE_CDP_PROJECT_ID) available.push("transak");
 	return c.json({
-		provider: process.env.ONRAMP_PROVIDER || (process.env.COINBASE_CDP_PROJECT_ID ? "coinbase" : "transak"),
+		provider: "transak",
-		available,
+		available: ["transak"],
-		// Transak fields (only needed if provider=transak)
 		apiKey: process.env.TRANSAK_API_KEY || "",
 		environment: process.env.TRANSAK_ENV || "PRODUCTION",
 	});
@@ -490,17 +467,6 @@ export const flowsModule: RSpaceModule = {
 	async onInit(ctx) {
 		_syncServer = ctx.syncServer;
 
-		// Initialize on-ramp providers if env vars are set
-		if (process.env.COINBASE_CDP_KEY_ID && process.env.COINBASE_CDP_KEY_SECRET && process.env.COINBASE_CDP_PROJECT_ID) {
-			_coinbaseOnramp = new CoinbaseOnrampProvider({
-				apiKeyId: process.env.COINBASE_CDP_KEY_ID,
-				apiKeySecret: process.env.COINBASE_CDP_KEY_SECRET,
-				projectId: process.env.COINBASE_CDP_PROJECT_ID,
-				environment: (process.env.COINBASE_ENVIRONMENT as 'sandbox' | 'production') || 'production',
-			});
-			console.log('[rflows] Coinbase Onramp provider initialized');
-		}
-
 		if (process.env.OPENFORT_API_KEY && process.env.OPENFORT_PUBLISHABLE_KEY) {
 			_openfort = new OpenfortProvider({
 				apiKey: process.env.OPENFORT_API_KEY,