Realm

1package otc
2
3import (
4	"chain"
5	"strconv"
6
7	"gno.land/r/nt/grc20reg/v0"
8)
9
10// The admin's whole reach (A1). None of these touches an offer or an escrow
11// (A3); every one refuses coins (S2) and emits an event.
12
13// AddToken whitelists a token by its grc20reg key, enabled (W2).
14func AddToken(cur realm, key string) {
15	requireAdmin(cur)
16	if grc20reg.Get(key) == nil {
17		panic(ErrTokenUnknown)
18	}
19	if tokens.Has(key) {
20		panic(ErrTokenExists)
21	}
22	if tokens.Size() >= maxTokens {
23		panic(ErrTooManyTokens)
24	}
25	tokens.Set(key, true)
26	chain.Emit(EventTokenChanged, "token", key, "enabled", "true")
27}
28
29// SetTokenEnabled switches new offers on a token on or off. Open offers on a
30// disabled token can still be filled and cancelled (W2).
31func SetTokenEnabled(cur realm, key string, enabled bool) {
32	requireAdmin(cur)
33	if !tokens.Has(key) {
34		panic(ErrTokenNotListed)
35	}
36	tokens.Set(key, enabled)
37	chain.Emit(EventTokenChanged, "token", key, "enabled", strconv.FormatBool(enabled))
38}
39
40// SetFeeBps sets the default fee for NEW offers (F4, F5).
41func SetFeeBps(cur realm, bps int64) {
42	requireAdmin(cur)
43	requireFee(bps)
44	feeBps = bps
45	chain.Emit(EventFeeChanged, "fee_bps", strconv.FormatInt(bps, 10))
46}
47
48// SetGnomicFee turns the reduced GNOMIC fee on or off and sets it (F6).
49func SetGnomicFee(cur realm, enabled bool, bps int64) {
50	requireAdmin(cur)
51	requireFee(bps)
52	gnomicFeeOn = enabled
53	gnomicFee = bps
54	chain.Emit(EventFeeChanged,
55		"gnomic_fee_enabled", strconv.FormatBool(enabled),
56		"gnomic_fee_bps", strconv.FormatInt(bps, 10))
57}
58
59// SetFeeRecipient changes where fees go.
60func SetFeeRecipient(cur realm, to address) {
61	requireAdmin(cur)
62	if !to.IsValid() {
63		panic(ErrBadAddress)
64	}
65	if to == realmAddr {
66		panic(ErrFeeToRealm)
67	}
68	old := feeRecipient
69	feeRecipient = to
70	chain.Emit(EventFeeRecipientChanged, "old", old.String(), "new", to.String())
71}
72
73// SetPaused blocks or allows new offers and fills. It never blocks Cancel
74// (A2, R10).
75func SetPaused(cur realm, p bool) {
76	requireAdmin(cur)
77	paused = p
78	chain.Emit(EventPaused, "paused", strconv.FormatBool(p))
79}
80
81// TransferAdmin hands the admin role to another address.
82func TransferAdmin(cur realm, to address) {
83	requireAdmin(cur)
84	if !to.IsValid() || to == realmAddr {
85		panic(ErrBadAddress)
86	}
87	old := admin
88	admin = to
89	chain.Emit(EventAdminChanged, "old", old.String(), "new", to.String())
90}
91
92func requireAdmin(cur realm) {
93	requireNoCoins()
94	if cur.Previous().Address() != admin {
95		panic(ErrNotAdmin) // S7
96	}
97}
98
99func requireFee(bps int64) {
100	if bps < 0 || bps > feeCapBps {
101		panic(ErrFeeAboveCap)
102	}
103}
104