(b.min_qty || 0) - (a.min_qty || 0)); for (let t of tiers) { if (qty >= (t.min_qty || 1)) { let disc = ((base - parseFloat(t.price_usd)) / base) * 100; return Math.round(disc); } } return 0; }, async submitBuy() { this.loading = true; this.errorMessage = ''; try { const res = await fetch('https://synapkey.com/checkout/create', { method: 'POST', headers: { 'Content-Type': 'application/json', 'Accept': 'application/json', 'X-CSRF-TOKEN': document.querySelector('meta[name=csrf-token]').content }, body: JSON.stringify({ product_id: 64, quantity: this.quantity, network: this.network, customer_email: this.email, coupon_code: this.couponApplied ? this.couponCode.trim() : null }) }); const data = await res.json(); if (res.ok && data.checkout_url) { window.location.href = data.checkout_url; } else { this.errorMessage = data.error || 'Failed to initiate order. Please try again.'; this.loading = false; } } catch (err) { this.errorMessage = 'Network error: ' + err.message; this.loading = false; } } }">