upgrade.gno

 1package ucs03_zkgm
 2
 3import (
 4	"strings"
 5
 6	"gno.land/r/onbloc/ibc/union/access"
 7)
 8
 9func ProxyPkgPath() string {
10	return proxyPkgPath
11}
12
13func ProxyAddress() address {
14	return proxyAddress
15}
16
17// RegisterImpl records an impl constructor under the calling realm's package
18// path. It is called from the impl realm's init, so the path is permanent once
19// installed: re-registration is rejected. The caller must be a sub-realm of this
20// proxy (its path must be prefixed by the proxy path), matching core's host
21// registration rule.
22func RegisterImpl(cur realm, constructor func(store IStore) IApp) {
23	currentPath := cur.PkgPath()
24	previousPath := cur.Previous().PkgPath()
25
26	prefix := currentPath + "/"
27
28	if !strings.HasPrefix(previousPath, prefix) {
29		panic("previous impl path is not a prefix of the current impl path")
30	}
31
32	if _, ok := implConstructors[previousPath]; ok {
33		panic("impl already registered")
34	}
35
36	implConstructors[previousPath] = constructor
37}
38
39// UpdateImpl installs or re-points the implementation following the bootstrap and
40// steady-state tiers of the trust model. It is admin-gated and injects the
41// proxy-owned store into the registered constructor for path.
42func UpdateImpl(cur realm, path string) {
43	access.AssertCanCall(0, cur, SelectorUpdateImpl)
44
45	constructor, ok := implConstructors[path]
46	if !ok {
47		panic("impl constructor not found")
48	}
49
50	oldImplPath := currentImplPath
51	currentImplPath = path
52	currentImpl = constructor(store)
53	emitZkgmImplUpdatedEvent(cur.Previous().PkgPath(), oldImplPath, path, []string{path})
54}
55
56// mustGetImpl returns the installed impl, panicking until the first UpdateImpl.
57func mustGetImpl() IApp {
58	if currentImpl == nil {
59		panic("implementation not installed")
60	}
61
62	return currentImpl
63}