mirror of
https://github.com/nspcc-dev/neo-go.git
synced 2024-11-27 03:58:06 +00:00
365 lines
9.8 KiB
Go
365 lines
9.8 KiB
Go
package native
|
|
|
|
import (
|
|
"encoding/binary"
|
|
"errors"
|
|
"math"
|
|
"math/big"
|
|
"sort"
|
|
"sync/atomic"
|
|
|
|
"github.com/nspcc-dev/neo-go/pkg/core/blockchainer"
|
|
"github.com/nspcc-dev/neo-go/pkg/core/blockchainer/services"
|
|
"github.com/nspcc-dev/neo-go/pkg/core/dao"
|
|
"github.com/nspcc-dev/neo-go/pkg/core/interop"
|
|
"github.com/nspcc-dev/neo-go/pkg/core/interop/runtime"
|
|
"github.com/nspcc-dev/neo-go/pkg/core/native/nativenames"
|
|
"github.com/nspcc-dev/neo-go/pkg/core/native/noderoles"
|
|
"github.com/nspcc-dev/neo-go/pkg/core/state"
|
|
"github.com/nspcc-dev/neo-go/pkg/crypto/hash"
|
|
"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
|
|
"github.com/nspcc-dev/neo-go/pkg/smartcontract"
|
|
"github.com/nspcc-dev/neo-go/pkg/smartcontract/callflag"
|
|
"github.com/nspcc-dev/neo-go/pkg/smartcontract/manifest"
|
|
"github.com/nspcc-dev/neo-go/pkg/util"
|
|
"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
|
|
)
|
|
|
|
// Designate represents designation contract.
|
|
type Designate struct {
|
|
interop.ContractMD
|
|
NEO *NEO
|
|
|
|
rolesChangedFlag atomic.Value
|
|
oracles atomic.Value
|
|
stateVals atomic.Value
|
|
neofsAlphabet atomic.Value
|
|
notaries atomic.Value
|
|
|
|
// p2pSigExtensionsEnabled defines whether the P2P signature extensions logic is relevant.
|
|
p2pSigExtensionsEnabled bool
|
|
|
|
OracleService atomic.Value
|
|
// NotaryService represents Notary node module.
|
|
NotaryService atomic.Value
|
|
// StateRootService represents StateRoot node module.
|
|
StateRootService blockchainer.StateRoot
|
|
}
|
|
|
|
type roleData struct {
|
|
nodes keys.PublicKeys
|
|
addr util.Uint160
|
|
height uint32
|
|
}
|
|
|
|
const (
|
|
designateContractID = -8
|
|
|
|
// maxNodeCount is the maximum number of nodes to set the role for.
|
|
maxNodeCount = 32
|
|
|
|
// DesignationEventName is the name of a designation event.
|
|
DesignationEventName = "Designation"
|
|
)
|
|
|
|
// Various errors.
|
|
var (
|
|
ErrAlreadyDesignated = errors.New("already designated given role at current block")
|
|
ErrEmptyNodeList = errors.New("node list is empty")
|
|
ErrInvalidIndex = errors.New("invalid index")
|
|
ErrInvalidRole = errors.New("invalid role")
|
|
ErrLargeNodeList = errors.New("node list is too large")
|
|
ErrNoBlock = errors.New("no persisting block in the context")
|
|
)
|
|
|
|
func (s *Designate) isValidRole(r noderoles.Role) bool {
|
|
return r == noderoles.Oracle || r == noderoles.StateValidator ||
|
|
r == noderoles.NeoFSAlphabet || (s.p2pSigExtensionsEnabled && r == noderoles.P2PNotary)
|
|
}
|
|
|
|
func newDesignate(p2pSigExtensionsEnabled bool) *Designate {
|
|
s := &Designate{ContractMD: *interop.NewContractMD(nativenames.Designation, designateContractID)}
|
|
s.p2pSigExtensionsEnabled = p2pSigExtensionsEnabled
|
|
defer s.UpdateHash()
|
|
|
|
desc := newDescriptor("getDesignatedByRole", smartcontract.ArrayType,
|
|
manifest.NewParameter("role", smartcontract.IntegerType),
|
|
manifest.NewParameter("index", smartcontract.IntegerType))
|
|
md := newMethodAndPrice(s.getDesignatedByRole, 1<<15, callflag.ReadStates)
|
|
s.AddMethod(md, desc)
|
|
|
|
desc = newDescriptor("designateAsRole", smartcontract.VoidType,
|
|
manifest.NewParameter("role", smartcontract.IntegerType),
|
|
manifest.NewParameter("nodes", smartcontract.ArrayType))
|
|
md = newMethodAndPrice(s.designateAsRole, 1<<15, callflag.States|callflag.AllowNotify)
|
|
s.AddMethod(md, desc)
|
|
|
|
s.AddEvent(DesignationEventName,
|
|
manifest.NewParameter("Role", smartcontract.IntegerType),
|
|
manifest.NewParameter("BlockIndex", smartcontract.IntegerType))
|
|
|
|
return s
|
|
}
|
|
|
|
// Initialize initializes Oracle contract.
|
|
func (s *Designate) Initialize(ic *interop.Context) error {
|
|
return nil
|
|
}
|
|
|
|
// OnPersist implements Contract interface.
|
|
func (s *Designate) OnPersist(ic *interop.Context) error {
|
|
return nil
|
|
}
|
|
|
|
// PostPersist implements Contract interface.
|
|
func (s *Designate) PostPersist(ic *interop.Context) error {
|
|
if !s.rolesChanged() {
|
|
return nil
|
|
}
|
|
|
|
if err := s.updateCachedRoleData(&s.oracles, ic.DAO, noderoles.Oracle); err != nil {
|
|
return err
|
|
}
|
|
if err := s.updateCachedRoleData(&s.stateVals, ic.DAO, noderoles.StateValidator); err != nil {
|
|
return err
|
|
}
|
|
if err := s.updateCachedRoleData(&s.neofsAlphabet, ic.DAO, noderoles.NeoFSAlphabet); err != nil {
|
|
return err
|
|
}
|
|
if s.p2pSigExtensionsEnabled {
|
|
if err := s.updateCachedRoleData(&s.notaries, ic.DAO, noderoles.P2PNotary); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
s.rolesChangedFlag.Store(false)
|
|
return nil
|
|
}
|
|
|
|
// Metadata returns contract metadata.
|
|
func (s *Designate) Metadata() *interop.ContractMD {
|
|
return &s.ContractMD
|
|
}
|
|
|
|
func (s *Designate) getDesignatedByRole(ic *interop.Context, args []stackitem.Item) stackitem.Item {
|
|
r, ok := s.getRole(args[0])
|
|
if !ok {
|
|
panic(ErrInvalidRole)
|
|
}
|
|
ind, err := args[1].TryInteger()
|
|
if err != nil || !ind.IsUint64() {
|
|
panic(ErrInvalidIndex)
|
|
}
|
|
index := ind.Uint64()
|
|
if index > uint64(ic.Chain.BlockHeight()+1) {
|
|
panic(ErrInvalidIndex)
|
|
}
|
|
pubs, _, err := s.GetDesignatedByRole(ic.DAO, r, uint32(index))
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
return pubsToArray(pubs)
|
|
}
|
|
|
|
func (s *Designate) rolesChanged() bool {
|
|
rc := s.rolesChangedFlag.Load()
|
|
return rc == nil || rc.(bool)
|
|
}
|
|
|
|
func (s *Designate) hashFromNodes(r noderoles.Role, nodes keys.PublicKeys) util.Uint160 {
|
|
if len(nodes) == 0 {
|
|
return util.Uint160{}
|
|
}
|
|
var script []byte
|
|
switch r {
|
|
case noderoles.P2PNotary:
|
|
script, _ = smartcontract.CreateMultiSigRedeemScript(1, nodes.Copy())
|
|
default:
|
|
script, _ = smartcontract.CreateDefaultMultiSigRedeemScript(nodes.Copy())
|
|
}
|
|
return hash.Hash160(script)
|
|
}
|
|
|
|
func (s *Designate) updateCachedRoleData(v *atomic.Value, d dao.DAO, r noderoles.Role) error {
|
|
nodeKeys, height, err := s.GetDesignatedByRole(d, r, math.MaxUint32)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
v.Store(&roleData{
|
|
nodes: nodeKeys,
|
|
addr: s.hashFromNodes(r, nodeKeys),
|
|
height: height,
|
|
})
|
|
switch r {
|
|
case noderoles.Oracle:
|
|
if orc, _ := s.OracleService.Load().(services.Oracle); orc != nil {
|
|
orc.UpdateOracleNodes(nodeKeys.Copy())
|
|
}
|
|
case noderoles.P2PNotary:
|
|
if ntr, _ := s.NotaryService.Load().(services.Notary); ntr != nil {
|
|
ntr.UpdateNotaryNodes(nodeKeys.Copy())
|
|
}
|
|
case noderoles.StateValidator:
|
|
if s.StateRootService != nil {
|
|
s.StateRootService.UpdateStateValidators(height, nodeKeys.Copy())
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (s *Designate) getCachedRoleData(r noderoles.Role) *roleData {
|
|
var val interface{}
|
|
switch r {
|
|
case noderoles.Oracle:
|
|
val = s.oracles.Load()
|
|
case noderoles.StateValidator:
|
|
val = s.stateVals.Load()
|
|
case noderoles.NeoFSAlphabet:
|
|
val = s.neofsAlphabet.Load()
|
|
case noderoles.P2PNotary:
|
|
val = s.notaries.Load()
|
|
}
|
|
if val != nil {
|
|
return val.(*roleData)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// GetLastDesignatedHash returns last designated hash of a given role.
|
|
func (s *Designate) GetLastDesignatedHash(d dao.DAO, r noderoles.Role) (util.Uint160, error) {
|
|
if !s.isValidRole(r) {
|
|
return util.Uint160{}, ErrInvalidRole
|
|
}
|
|
if !s.rolesChanged() {
|
|
if val := s.getCachedRoleData(r); val != nil {
|
|
return val.addr, nil
|
|
}
|
|
}
|
|
nodes, _, err := s.GetDesignatedByRole(d, r, math.MaxUint32)
|
|
if err != nil {
|
|
return util.Uint160{}, err
|
|
}
|
|
// We only have hashing defined for oracles now.
|
|
return s.hashFromNodes(r, nodes), nil
|
|
}
|
|
|
|
// GetDesignatedByRole returns nodes for role r.
|
|
func (s *Designate) GetDesignatedByRole(d dao.DAO, r noderoles.Role, index uint32) (keys.PublicKeys, uint32, error) {
|
|
if !s.isValidRole(r) {
|
|
return nil, 0, ErrInvalidRole
|
|
}
|
|
if !s.rolesChanged() {
|
|
if val := s.getCachedRoleData(r); val != nil && val.height <= index {
|
|
return val.nodes.Copy(), val.height, nil
|
|
}
|
|
}
|
|
kvs, err := d.GetStorageItemsWithPrefix(s.ID, []byte{byte(r)})
|
|
if err != nil {
|
|
return nil, 0, err
|
|
}
|
|
var (
|
|
ns NodeList
|
|
bestIndex uint32
|
|
resSi state.StorageItem
|
|
)
|
|
// kvs are sorted by key (BE index bytes) in ascending way, so iterate backwards to get the latest designated.
|
|
for i := len(kvs) - 1; i >= 0; i-- {
|
|
kv := kvs[i]
|
|
if len(kv.Key) < 4 {
|
|
continue
|
|
}
|
|
siInd := binary.BigEndian.Uint32(kv.Key)
|
|
if siInd <= index {
|
|
bestIndex = siInd
|
|
resSi = kv.Item
|
|
break
|
|
}
|
|
}
|
|
if resSi != nil {
|
|
err = stackitem.DeserializeConvertible(resSi, &ns)
|
|
if err != nil {
|
|
return nil, 0, err
|
|
}
|
|
}
|
|
return keys.PublicKeys(ns), bestIndex, err
|
|
}
|
|
|
|
func (s *Designate) designateAsRole(ic *interop.Context, args []stackitem.Item) stackitem.Item {
|
|
r, ok := s.getRole(args[0])
|
|
if !ok {
|
|
panic(ErrInvalidRole)
|
|
}
|
|
var ns NodeList
|
|
if err := ns.FromStackItem(args[1]); err != nil {
|
|
panic(err)
|
|
}
|
|
|
|
err := s.DesignateAsRole(ic, r, keys.PublicKeys(ns))
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
return stackitem.Null{}
|
|
}
|
|
|
|
// DesignateAsRole sets nodes for role r.
|
|
func (s *Designate) DesignateAsRole(ic *interop.Context, r noderoles.Role, pubs keys.PublicKeys) error {
|
|
length := len(pubs)
|
|
if length == 0 {
|
|
return ErrEmptyNodeList
|
|
}
|
|
if length > maxNodeCount {
|
|
return ErrLargeNodeList
|
|
}
|
|
if !s.isValidRole(r) {
|
|
return ErrInvalidRole
|
|
}
|
|
h := s.NEO.GetCommitteeAddress()
|
|
if ok, err := runtime.CheckHashedWitness(ic, h); err != nil || !ok {
|
|
return ErrInvalidWitness
|
|
}
|
|
if ic.Block == nil {
|
|
return ErrNoBlock
|
|
}
|
|
var key = make([]byte, 5)
|
|
key[0] = byte(r)
|
|
binary.BigEndian.PutUint32(key[1:], ic.Block.Index+1)
|
|
|
|
si := ic.DAO.GetStorageItem(s.ID, key)
|
|
if si != nil {
|
|
return ErrAlreadyDesignated
|
|
}
|
|
sort.Sort(pubs)
|
|
nl := NodeList(pubs)
|
|
s.rolesChangedFlag.Store(true)
|
|
err := putConvertibleToDAO(s.ID, ic.DAO, key, &nl)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
ic.Notifications = append(ic.Notifications, state.NotificationEvent{
|
|
ScriptHash: s.Hash,
|
|
Name: DesignationEventName,
|
|
Item: stackitem.NewArray([]stackitem.Item{
|
|
stackitem.NewBigInteger(big.NewInt(int64(r))),
|
|
stackitem.NewBigInteger(big.NewInt(int64(ic.Block.Index))),
|
|
}),
|
|
})
|
|
return nil
|
|
}
|
|
|
|
func (s *Designate) getRole(item stackitem.Item) (noderoles.Role, bool) {
|
|
bi, err := item.TryInteger()
|
|
if err != nil {
|
|
return 0, false
|
|
}
|
|
if !bi.IsUint64() {
|
|
return 0, false
|
|
}
|
|
u := bi.Uint64()
|
|
return noderoles.Role(u), u <= math.MaxUint8 && s.isValidRole(noderoles.Role(u))
|
|
}
|
|
|
|
// InitializeCache invalidates native Designate cache.
|
|
func (s *Designate) InitializeCache() {
|
|
s.rolesChangedFlag.Store(true)
|
|
}
|