How big can a Live Activity update be, and what do update and end pushes look like?

Predict first

What sizes result?

import Foundation
import ActivityKit

struct ScoreAttributes: ActivityAttributes {
    struct ContentState: Codable, Hashable { var home: Int; var away: Int; var minute: Int; var note: String }
    var homeTeam: String
    var awayTeam: String
}
func json(_ o: Any) -> Data { try! JSONSerialization.data(withJSONObject: o, options: [.sortedKeys]) }
let state = ScoreAttributes.ContentState(home: 2, away: 1, minute: 67, note: "Goal!")
let encoded = try! JSONEncoder().encode(state)
print("ContentState JSON:", String(data: encoded, encoding: .utf8)!.count, "characters")
let update: [String: Any] = ["aps": ["timestamp": 1_700_000_000, "event": "update",
                                       "content-state": try! JSONSerialization.jsonObject(with: encoded),
                                       "alert": ["title": "Goal", "body": "Pune 2 - 1 Goa"]]]
print("update push bytes:", json(update).count)
let bloated = ScoreAttributes.ContentState(home: 2, away: 1, minute: 67, note: String(repeating: "x", count: 4200))
print("bloated state fits in 4 KB push:", json(["aps": ["timestamp": 1, "event": "update", "content-state": try! JSONSerialization.jsonObject(with: JSONEncoder().encode(bloated))]]).count <= 4096)
let content = ActivityContent(state: state, staleDate: Date(timeIntervalSince1970: 1_700_000_300), relevanceScore: 75)
print("stale date set:", content.staleDate != nil, "relevance:", content.relevanceScore)
let end: [String: Any] = ["aps": ["timestamp": 1_700_000_900, "event": "end", "dismissal-date": 1_700_001_800, "content-state": try! JSONSerialization.jsonObject(with: encoded)]]
print("end payload bytes:", json(end).count)

• The state is 46 characters, the update 161 bytes, a bloated state does not fit, and the stale date is set
• Any state fits
• The update is over 4096 bytes