frostfs-contract/neofsid/neofsid_contract.go

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package neofsidcontract
import (
"github.com/nspcc-dev/neo-go/pkg/interop/binary"
"github.com/nspcc-dev/neo-go/pkg/interop/contract"
"github.com/nspcc-dev/neo-go/pkg/interop/crypto"
"github.com/nspcc-dev/neo-go/pkg/interop/runtime"
"github.com/nspcc-dev/neo-go/pkg/interop/storage"
"github.com/nspcc-dev/neofs-contract/common"
)
type (
irNode struct {
key []byte
}
UserInfo struct {
Keys [][]byte
}
)
const (
version = 1
netmapContractKey = "netmapScriptHash"
containerContractKey = "containerScriptHash"
)
var (
ctx storage.Context
)
func init() {
if runtime.GetTrigger() != runtime.Application {
panic("contract has not been called in application node")
}
ctx = storage.GetContext()
}
func Init(addrNetmap, addrContainer []byte) {
if storage.Get(ctx, netmapContractKey) != nil {
panic("init: contract already deployed")
}
if len(addrNetmap) != 20 || len(addrContainer) != 20 {
panic("init: incorrect length of contract script hash")
}
storage.Put(ctx, netmapContractKey, addrNetmap)
storage.Put(ctx, containerContractKey, addrContainer)
runtime.Log("neofsid contract initialized")
}
func AddKey(owner []byte, keys [][]byte) bool {
var (
n int // number of votes for inner ring invoke
id []byte // ballot key of the inner ring invocation
)
if len(owner) != 25 {
panic("addKey: incorrect owner")
}
netmapContractAddr := storage.Get(ctx, netmapContractKey).([]byte)
innerRing := contract.Call(netmapContractAddr, "innerRingList").([]irNode)
threshold := len(innerRing)/3*2 + 1
irKey := innerRingInvoker(innerRing)
if len(irKey) == 0 {
panic("addKey: invocation from non inner ring node")
}
info := getUserInfo(ctx, owner)
addLoop:
for i := 0; i < len(keys); i++ {
pubKey := keys[i]
if len(pubKey) != 33 {
panic("addKey: incorrect public key")
}
for j := range info.Keys {
key := info.Keys[j]
if common.BytesEqual(key, pubKey) {
continue addLoop
}
}
info.Keys = append(info.Keys, pubKey)
}
fromKnownContract := fromKnownContract(runtime.GetCallingScriptHash())
if fromKnownContract {
n = threshold
runtime.Log("addKey: processed indirect invoke")
} else {
id := invokeIDKeys(owner, keys, []byte("add"))
n = common.Vote(ctx, id, irKey)
}
if n < threshold {
runtime.Log("addKey: processed invoke from inner ring")
return true
}
common.RemoveVotes(ctx, id)
common.SetSerialized(ctx, owner, info)
runtime.Log("addKey: key bound to the owner")
return true
}
func RemoveKey(owner []byte, keys [][]byte) bool {
if len(owner) != 25 {
panic("removeKey: incorrect owner")
}
netmapContractAddr := storage.Get(ctx, netmapContractKey).([]byte)
innerRing := contract.Call(netmapContractAddr, "innerRingList").([]irNode)
threshold := len(innerRing)/3*2 + 1
irKey := innerRingInvoker(innerRing)
if len(irKey) == 0 {
panic("removeKey: invocation from non inner ring node")
}
id := invokeIDKeys(owner, keys, []byte("remove"))
n := common.Vote(ctx, id, irKey)
if n < threshold {
runtime.Log("removeKey: processed invoke from inner ring")
return true
}
common.RemoveVotes(ctx, id)
info := getUserInfo(ctx, owner)
var leftKeys [][]byte
rmLoop:
for i := range info.Keys {
key := info.Keys[i]
for j := 0; j < len(keys); j++ {
pubKey := keys[j]
if len(pubKey) != 33 {
panic("removeKey: incorrect public key")
}
if common.BytesEqual(key, pubKey) {
continue rmLoop
}
}
leftKeys = append(leftKeys, key)
}
info.Keys = leftKeys
common.SetSerialized(ctx, owner, info)
return true
}
func Key(owner []byte) [][]byte {
if len(owner) != 25 {
panic("key: incorrect owner")
}
info := getUserInfo(ctx, owner)
return info.Keys
}
func Version() int {
return version
}
func getUserInfo(ctx storage.Context, key interface{}) UserInfo {
data := storage.Get(ctx, key)
if data != nil {
return binary.Deserialize(data.([]byte)).(UserInfo)
}
return UserInfo{Keys: [][]byte{}}
}
func innerRingInvoker(ir []irNode) []byte {
for i := 0; i < len(ir); i++ {
node := ir[i]
if runtime.CheckWitness(node.key) {
return node.key
}
}
return nil
}
func invokeIDKeys(owner []byte, keys [][]byte, prefix []byte) []byte {
prefix = append(prefix, owner...)
for i := range keys {
prefix = append(prefix, keys[i]...)
}
return crypto.SHA256(prefix)
}
func fromKnownContract(caller []byte) bool {
containerContractAddr := storage.Get(ctx, containerContractKey).([]byte)
if common.BytesEqual(caller, containerContractAddr) {
return true
}
return false
}