{"type":"excalidraw","version":2,"source":"https://AwesomeSystemDesign.dev","elements":[{"angle":0,"strokeColor":"#6577aa","backgroundColor":"#eef1fc","fillStyle":"solid","strokeWidth":1.5,"strokeStyle":"solid","roughness":0.7,"opacity":100,"version":1,"versionNonce":1,"isDeleted":false,"groupIds":["step-1"],"frameId":null,"roundness":null,"boundElements":[{"type":"text","id":"shape-1"}],"updated":0,"link":null,"locked":false,"id":"shape-0","type":"rectangle","seed":41,"x":36,"y":32,"width":192,"height":68,"customData":{"revealStep":1}},{"angle":0,"strokeColor":"#394557","backgroundColor":"transparent","fillStyle":"solid","strokeWidth":1.5,"strokeStyle":"solid","roughness":0.7,"opacity":100,"version":1,"versionNonce":1,"isDeleted":false,"groupIds":["step-1"],"frameId":null,"roundness":null,"boundElements":null,"updated":0,"link":null,"locked":false,"id":"shape-1","type":"text","seed":114,"x":56,"y":54.3,"width":152,"height":23.400000000000002,"fontSize":18,"fontFamily":1,"text":"Day| Action","originalText":"Day| Action","textAlign":"center","verticalAlign":"middle","containerId":"shape-0","lineHeight":1.3,"autoResize":false,"customData":{"revealStep":1}},{"angle":0,"strokeColor":"#628572","backgroundColor":"#edf5ee","fillStyle":"solid","strokeWidth":1.5,"strokeStyle":"solid","roughness":0.7,"opacity":100,"version":1,"versionNonce":1,"isDeleted":false,"groupIds":["step-2"],"frameId":null,"roundness":null,"boundElements":[{"type":"text","id":"shape-3"}],"updated":0,"link":null,"locked":false,"id":"shape-2","type":"rectangle","seed":187,"x":268,"y":32,"width":390,"height":270,"customData":{"revealStep":2}},{"angle":0,"strokeColor":"#394557","backgroundColor":"transparent","fillStyle":"solid","strokeWidth":1.5,"strokeStyle":"solid","roughness":0.7,"opacity":100,"version":1,"versionNonce":1,"isDeleted":false,"groupIds":["step-2"],"frameId":null,"roundness":null,"boundElements":null,"updated":0,"link":null,"locked":false,"id":"shape-3","type":"text","seed":260,"x":288,"y":50,"width":350,"height":234,"fontSize":18,"fontFamily":1,"text":"0 | Charge fails → retry in 3 days,\nemail customer\n3 | Retry charge → fails → retry in 5\ndays\n8 | Retry charge → fails → email\n\"update card\"\n14 | Final retry → fails → cancel\nsubscription\n→ webhook:\n\"customer.subscription.deleted\"","originalText":"0 | Charge fails → retry in 3 days,\nemail customer\n3 | Retry charge → fails → retry in 5\ndays\n8 | Retry charge → fails → email\n\"update card\"\n14 | Final retry → fails → cancel\nsubscription\n→ webhook:\n\"customer.subscription.deleted\"","textAlign":"center","verticalAlign":"middle","containerId":"shape-2","lineHeight":1.3,"autoResize":false,"customData":{"revealStep":2}},{"angle":0,"strokeColor":"#a68a53","backgroundColor":"#fff7e6","fillStyle":"solid","strokeWidth":1.5,"strokeStyle":"solid","roughness":0.7,"opacity":100,"version":1,"versionNonce":1,"isDeleted":false,"groupIds":["step-3"],"frameId":null,"roundness":null,"boundElements":[{"type":"text","id":"shape-5"}],"updated":0,"link":null,"locked":false,"id":"shape-4","type":"rectangle","seed":333,"x":36,"y":342,"width":527.2968400000001,"height":566.4,"customData":{"revealStep":3}},{"angle":0,"strokeColor":"#394557","backgroundColor":"transparent","fillStyle":"solid","strokeWidth":1.5,"strokeStyle":"solid","roughness":0.7,"opacity":100,"version":1,"versionNonce":1,"isDeleted":false,"groupIds":["step-3"],"frameId":null,"roundness":null,"boundElements":null,"updated":0,"link":null,"locked":false,"id":"shape-5","type":"text","seed":406,"x":56,"y":360,"width":487.2968400000001,"height":530.4,"fontSize":17,"fontFamily":1,"text":"Subscription Lifecycle\n\n1. Create subscription:\ncustomer=cus_123, plan=monthly_pro ($49/mo)\nbilling_anchor=1st of month\n\n2. Billing engine (runs daily):\nSELECT subscriptions\nWHERE next_billing_date <= NOW()\nAND status = 'active'\n\n3. For each due subscription:\n→ Create payment intent ($49.00)\n→ Attempt charge on stored payment method\n→ If succeeds: advance next_billing_date by 1 month\n→ If fails: enter dunning cycle\n\nDunning (failed payment recovery):\n\nProration (mid-cycle plan change):\nCustomer upgrades from $49 → $99 on day 15 of 30:\nUnused on old plan: $49 × (15/30) = $24.50 credit\nRemaining on new plan: $99 × (15/30) = $49.50 charge\nNet charge: $49.50 - $24.50 = $25.00","originalText":"Subscription Lifecycle\n\n1. Create subscription:\ncustomer=cus_123, plan=monthly_pro ($49/mo)\nbilling_anchor=1st of month\n\n2. Billing engine (runs daily):\nSELECT subscriptions\nWHERE next_billing_date <= NOW()\nAND status = 'active'\n\n3. For each due subscription:\n→ Create payment intent ($49.00)\n→ Attempt charge on stored payment method\n→ If succeeds: advance next_billing_date by 1 month\n→ If fails: enter dunning cycle\n\nDunning (failed payment recovery):\n\nProration (mid-cycle plan change):\nCustomer upgrades from $49 → $99 on day 15 of 30:\nUnused on old plan: $49 × (15/30) = $24.50 credit\nRemaining on new plan: $99 × (15/30) = $49.50 charge\nNet charge: $49.50 - $24.50 = $25.00","textAlign":"left","verticalAlign":"middle","containerId":"shape-4","lineHeight":1.3,"autoResize":false,"customData":{"revealStep":3}}],"appState":{"viewBackgroundColor":"#fbfbf8","gridSize":null},"files":{}}