arena.gno

 1package arena
 2
 3import (
 4	"strconv"
 5	"time"
 6
 7	"gno.land/p/nt/bptree/v0"
 8)
 9
10// The whole state of the realm. Everything is unexported and nothing below is
11// ever returned by reference: the trees are /p/ types with mutator methods,
12// so handing one out would be handing out write access to the realm.
13var (
14	version int64 // bumps on every admin write, see Version
15
16	// Arenas exist from the first paid entry until their game is over, or
17	// their lobby is empty. An arena nobody paid into is never stored.
18	arenas bptree.BPTree // arena id -> *arena, with its lobby and its round
19
20	// The last games played, for readers: their result, by arena id, and the
21	// ids in the order they closed, oldest first.
22	results bptree.BPTree // arena id -> encoded result, see results.gno
23	closed  []string
24
25	refundDelay int64 // seconds after a game's time limit before anyone may refund it
26
27	escrowed int64 // ugnot owed to players: the stakes of every lobby and running game, and their unclaimed winnings
28
29	// Winnings not claimed yet, see claims.gno.
30	claims bptree.BPTree // player address -> encoded credits
31
32	// What players won, see earnings.gno.
33	earnings bptree.BPTree // player address -> encoded totals, allocated on a first settled game
34	winners  ranking       // the top players by winnings
35
36	webPath string // "/r/g1t2kg2vtr3fukg43eujkn6x53gfdyakhngt4sfd/gnofly/arena/v0", used to build links in Render
37)
38
39const defaultRefundDelay = 600 // seconds
40
41// init runs once, when the package is added to the chain. Unlike the game
42// realm this one has nothing to remember about its deployer: it has no role
43// of its own.
44func init(cur realm) {
45	bootstrap(cur.PkgPath())
46}
47
48// bootstrap (re)creates the initial state. The tests call it to start from a
49// clean slate.
50func bootstrap(pkgPath string) {
51	arenas = bptree.BPTree{}
52	results = bptree.BPTree{}
53	closed = nil
54	refundDelay = defaultRefundDelay
55	escrowed = 0
56	claims = bptree.BPTree{}
57	earnings = bptree.BPTree{}
58	winners = ranking{}
59	webPath = webPathOf(pkgPath)
60	version = 1
61}
62
63// Version returns a counter that bumps on every admin write: the refund
64// delay. Player and referee actions do not bump it.
65func Version() int64 {
66	return version
67}
68
69// now returns the block time in Unix seconds.
70func now() int64 {
71	return time.Now().Unix()
72}
73
74// webPathOf turns "gno.land/r/..." into "/r/...".
75func webPathOf(pkgPath string) string {
76	for i := 0; i < len(pkgPath); i++ {
77		if pkgPath[i] == '/' {
78			return pkgPath[i:]
79		}
80	}
81	return ""
82}
83
84func itoa(n int64) string {
85	return strconv.FormatInt(n, 10)
86}