frostfs-contract/container/container_contract.go

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package container
import (
"github.com/nspcc-dev/neo-go/pkg/interop"
"github.com/nspcc-dev/neo-go/pkg/interop/contract"
"github.com/nspcc-dev/neo-go/pkg/interop/iterator"
"github.com/nspcc-dev/neo-go/pkg/interop/native/crypto"
"github.com/nspcc-dev/neo-go/pkg/interop/native/management"
"github.com/nspcc-dev/neo-go/pkg/interop/native/std"
"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 (
storageNode struct {
info []byte
}
Container struct {
value []byte
sig interop.Signature
pub interop.PublicKey
token []byte
}
ExtendedACL struct {
value []byte
sig interop.Signature
pub interop.PublicKey
token []byte
}
estimation struct {
from interop.PublicKey
size int
}
containerSizes struct {
cid []byte
estimations []estimation
}
)
const (
neofsIDContractKey = "identityScriptHash"
balanceContractKey = "balanceScriptHash"
netmapContractKey = "netmapScriptHash"
notaryDisabledKey = "notary"
containerFeeKey = "ContainerFee"
containerIDSize = 32 // SHA256 size
estimateKeyPrefix = "cnr"
estimatePostfixSize = 10
cleanupDelta = 3
)
var (
eACLPrefix = []byte("eACL")
)
func _deploy(data interface{}, isUpdate bool) {
ctx := storage.GetContext()
if isUpdate {
return
}
args := data.([]interface{})
notaryDisabled := args[0].(bool)
owner := args[1].(interop.Hash160)
addrNetmap := args[2].(interop.Hash160)
addrBalance := args[3].(interop.Hash160)
addrID := args[4].(interop.Hash160)
if !common.HasUpdateAccess(ctx) {
panic("only owner can reinitialize contract")
}
if len(addrNetmap) != 20 || len(addrBalance) != 20 || len(addrID) != 20 {
panic("init: incorrect length of contract script hash")
}
storage.Put(ctx, common.OwnerKey, owner)
storage.Put(ctx, netmapContractKey, addrNetmap)
storage.Put(ctx, balanceContractKey, addrBalance)
storage.Put(ctx, neofsIDContractKey, addrID)
// initialize the way to collect signatures
storage.Put(ctx, notaryDisabledKey, notaryDisabled)
if notaryDisabled {
common.InitVote(ctx)
runtime.Log("container contract notary disabled")
}
runtime.Log("container contract initialized")
}
// Migrate method updates contract source code and manifest. Can be invoked
// only by contract owner.
func Migrate(script []byte, manifest []byte, data interface{}) bool {
ctx := storage.GetReadOnlyContext()
if !common.HasUpdateAccess(ctx) {
runtime.Log("only owner can update contract")
return false
}
contract.Call(interop.Hash160(management.Hash), "update", contract.All, script, manifest, data)
runtime.Log("container contract updated")
return true
}
// Put method creates new container if it was invoked by Alphabet nodes
// of the Inner Ring. Otherwise it produces containerPut notification.
//
// Container should be stable marshaled Container structure from API.
// Signature is a RFC6979 signature of Container.
// PublicKey contains public key of the signer.
// Token is optional and should be stable marshaled SessionToken structure from
// API.
func Put(container []byte, signature interop.Signature, publicKey interop.PublicKey, token []byte) {
ctx := storage.GetContext()
notaryDisabled := storage.Get(ctx, notaryDisabledKey).(bool)
ownerID := ownerFromBinaryContainer(container)
containerID := crypto.Sha256(container)
neofsIDContractAddr := storage.Get(ctx, neofsIDContractKey).(interop.Hash160)
cnr := Container{
value: container,
sig: signature,
pub: publicKey,
token: token,
}
var ( // for invocation collection without notary
alphabet = common.AlphabetNodes()
nodeKey []byte
alphabetCall bool
)
if notaryDisabled {
nodeKey = common.InnerRingInvoker(alphabet)
alphabetCall = len(nodeKey) != 0
} else {
multiaddr := common.AlphabetAddress()
alphabetCall = runtime.CheckWitness(multiaddr)
}
from := common.WalletToScriptHash(ownerID)
netmapContractAddr := storage.Get(ctx, netmapContractKey).(interop.Hash160)
balanceContractAddr := storage.Get(ctx, balanceContractKey).(interop.Hash160)
containerFee := contract.Call(netmapContractAddr, "config", contract.ReadOnly, containerFeeKey).(int)
balance := contract.Call(balanceContractAddr, "balanceOf", contract.ReadOnly, from).(int)
details := common.ContainerFeeTransferDetails(containerID)
if !alphabetCall {
if balance < containerFee*len(alphabet) {
panic("insufficient balance to create container")
}
runtime.Notify("containerPut", container, signature, publicKey, token)
return
}
// todo: check if new container with unique container id
if notaryDisabled {
threshold := len(alphabet)*2/3 + 1
id := common.InvokeID([]interface{}{container, signature, publicKey}, []byte("put"))
n := common.Vote(ctx, id, nodeKey)
if n < threshold {
return
}
common.RemoveVotes(ctx, id)
}
for i := 0; i < len(alphabet); i++ {
node := alphabet[i]
to := contract.CreateStandardAccount(node.PublicKey)
contract.Call(balanceContractAddr, "transferX",
contract.All,
from,
to,
containerFee,
details,
)
}
addContainer(ctx, containerID, ownerID, cnr)
if len(token) == 0 { // if container created directly without session
contract.Call(neofsIDContractAddr, "addKey", contract.All, ownerID, [][]byte{publicKey})
}
runtime.Log("put: added new container")
}
// Delete method removes container from contract storage if it was
// invoked by Alphabet nodes of the Inner Ring. Otherwise it produces
// containerDelete notification.
//
// Signature is a RFC6979 signature of container ID.
// Token is optional and should be stable marshaled SessionToken structure from
// API.
func Delete(containerID []byte, signature interop.Signature, token []byte) {
ctx := storage.GetContext()
notaryDisabled := storage.Get(ctx, notaryDisabledKey).(bool)
ownerID := getOwnerByID(ctx, containerID)
if len(ownerID) == 0 {
return
}
var ( // for invocation collection without notary
alphabet []common.IRNode
nodeKey []byte
alphabetCall bool
)
if notaryDisabled {
alphabet = common.AlphabetNodes()
nodeKey = common.InnerRingInvoker(alphabet)
alphabetCall = len(nodeKey) != 0
} else {
multiaddr := common.AlphabetAddress()
alphabetCall = runtime.CheckWitness(multiaddr)
}
if !alphabetCall {
runtime.Notify("containerDelete", containerID, signature, token)
return
}
if notaryDisabled {
threshold := len(alphabet)*2/3 + 1
id := common.InvokeID([]interface{}{containerID, signature}, []byte("delete"))
n := common.Vote(ctx, id, nodeKey)
if n < threshold {
return
}
common.RemoveVotes(ctx, id)
}
removeContainer(ctx, containerID, ownerID)
runtime.Log("delete: remove container")
}
// Get method returns structure that contains stable marshaled Container structure,
// signature, public key of the container creator and stable marshaled SessionToken
// structure if it was provided.
func Get(containerID []byte) Container {
ctx := storage.GetReadOnlyContext()
return getContainer(ctx, containerID)
}
// Owner method returns 25 byte Owner ID of the container.
func Owner(containerID []byte) []byte {
ctx := storage.GetReadOnlyContext()
return getOwnerByID(ctx, containerID)
}
// List method returns list of all container IDs owned by specified owner.
func List(owner []byte) [][]byte {
ctx := storage.GetReadOnlyContext()
if len(owner) == 0 {
return getAllContainers(ctx)
}
var list [][]byte
it := storage.Find(ctx, owner, storage.ValuesOnly)
for iterator.Next(it) {
id := iterator.Value(it).([]byte)
list = append(list, id)
}
return list
}
// SetEACL method sets new extended ACL table related to the contract
// if it was invoked by Alphabet nodes of the Inner Ring. Otherwise it produces
// setEACL notification.
//
// EACL should be stable marshaled EACLTable structure from API.
// Signature is a RFC6979 signature of Container.
// PublicKey contains public key of the signer.
// Token is optional and should be stable marshaled SessionToken structure from
// API.
func SetEACL(eACL []byte, signature interop.Signature, publicKey interop.PublicKey, token []byte) {
ctx := storage.GetContext()
notaryDisabled := storage.Get(ctx, notaryDisabledKey).(bool)
// get container ID
offset := int(eACL[1])
offset = 2 + offset + 4
containerID := eACL[offset : offset+32]
ownerID := getOwnerByID(ctx, containerID)
if len(ownerID) == 0 {
panic("setEACL: container does not exists")
}
var ( // for invocation collection without notary
alphabet []common.IRNode
nodeKey []byte
alphabetCall bool
)
if notaryDisabled {
alphabet = common.AlphabetNodes()
nodeKey = common.InnerRingInvoker(alphabet)
alphabetCall = len(nodeKey) != 0
} else {
multiaddr := common.AlphabetAddress()
alphabetCall = runtime.CheckWitness(multiaddr)
}
if !alphabetCall {
runtime.Notify("setEACL", eACL, signature, publicKey, token)
return
}
rule := ExtendedACL{
value: eACL,
sig: signature,
pub: publicKey,
token: token,
}
key := append(eACLPrefix, containerID...)
if notaryDisabled {
threshold := len(alphabet)*2/3 + 1
id := common.InvokeID([]interface{}{eACL}, []byte("setEACL"))
n := common.Vote(ctx, id, nodeKey)
if n < threshold {
return
}
common.RemoveVotes(ctx, id)
}
common.SetSerialized(ctx, key, rule)
runtime.Log("setEACL: success")
}
// EACL method returns structure that contains stable marshaled EACLTable structure,
// signature, public key of the extended ACL setter and stable marshaled SessionToken
// structure if it was provided.
func EACL(containerID []byte) ExtendedACL {
ctx := storage.GetReadOnlyContext()
ownerID := getOwnerByID(ctx, containerID)
if len(ownerID) == 0 {
panic("eACL: container does not exists")
}
return getEACL(ctx, containerID)
}
// PutContainerSize method saves container size estimation in contract
// memory. Can be invoked only by Storage nodes from the network map. Method
// checks witness based on the provided public key of the Storage node.
func PutContainerSize(epoch int, cid []byte, usedSize int, pubKey interop.PublicKey) {
ctx := storage.GetContext()
if !runtime.CheckWitness(pubKey) {
panic("container: invalid witness for size estimation")
}
if !isStorageNode(ctx, pubKey) {
panic("container: only storage nodes can save size estimations")
}
key := estimationKey(epoch, cid, pubKey)
s := estimation{
from: pubKey,
size: usedSize,
}
storage.Put(ctx, key, std.Serialize(s))
runtime.Log("container: saved container size estimation")
}
// GetContainerSize method returns container ID and slice of container
// estimations. Container estimation includes public key of the Storage Node
// that registered estimation and value of estimation.
//
// Use ID obtained from ListContainerSizes method. Estimations are removed
// from contract storage every epoch, see NewEpoch method, therefore method
// can return different results in different epochs.
func GetContainerSize(id []byte) containerSizes {
ctx := storage.GetReadOnlyContext()
// this `id` expected to be from `ListContainerSizes`
// therefore it is not contains postfix, we ignore it in the cut.
ln := len(id)
cid := id[ln-containerIDSize : ln]
return getContainerSizeEstimation(ctx, id, cid)
}
// ListContainerSizes method returns IDs of container size estimations
// that has been registered for specified epoch.
func ListContainerSizes(epoch int) [][]byte {
ctx := storage.GetReadOnlyContext()
var buf interface{} = epoch
key := []byte(estimateKeyPrefix)
key = append(key, buf.([]byte)...)
it := storage.Find(ctx, key, storage.KeysOnly)
uniq := map[string]struct{}{}
for iterator.Next(it) {
storageKey := iterator.Value(it).([]byte)
ln := len(storageKey)
storageKey = storageKey[:ln-estimatePostfixSize]
uniq[string(storageKey)] = struct{}{}
}
var result [][]byte
for k := range uniq {
result = append(result, []byte(k))
}
return result
}
// NewEpoch method removes all container size estimations from epoch older than
// epochNum + 3. Can be invoked only by NewEpoch method of the Netmap contract.
func NewEpoch(epochNum int) {
ctx := storage.GetContext()
notaryDisabled := storage.Get(ctx, notaryDisabledKey).(bool)
if notaryDisabled {
indirectCall := common.FromKnownContract(
ctx,
runtime.GetCallingScriptHash(),
netmapContractKey,
)
if !indirectCall {
panic("newEpoch: this method must be invoked from inner ring")
}
} else {
multiaddr := common.AlphabetAddress()
if !runtime.CheckWitness(multiaddr) {
panic("newEpoch: this method must be invoked from inner ring")
}
}
candidates := keysToDelete(ctx, epochNum)
for _, candidate := range candidates {
storage.Delete(ctx, candidate)
}
}
// StartContainerEstimation method produces StartEstimation notification.
// Can be invoked only by Alphabet nodes of the Inner Ring.
func StartContainerEstimation(epoch int) {
ctx := storage.GetContext()
notaryDisabled := storage.Get(ctx, notaryDisabledKey).(bool)
var ( // for invocation collection without notary
alphabet []common.IRNode
nodeKey []byte
)
if notaryDisabled {
alphabet = common.AlphabetNodes()
nodeKey = common.InnerRingInvoker(alphabet)
if len(nodeKey) == 0 {
panic("startEstimation: only inner ring nodes can invoke this")
}
} else {
multiaddr := common.AlphabetAddress()
if !runtime.CheckWitness(multiaddr) {
panic("startEstimation: only inner ring nodes can invoke this")
}
}
if notaryDisabled {
threshold := len(alphabet)*2/3 + 1
id := common.InvokeID([]interface{}{epoch}, []byte("startEstimation"))
n := common.Vote(ctx, id, nodeKey)
if n < threshold {
return
}
common.RemoveVotes(ctx, id)
}
runtime.Notify("StartEstimation", epoch)
runtime.Log("startEstimation: notification has been produced")
}
// StopContainerEstimation method produces StopEstimation notification.
// Can be invoked only by Alphabet nodes of the Inner Ring.
func StopContainerEstimation(epoch int) {
ctx := storage.GetContext()
notaryDisabled := storage.Get(ctx, notaryDisabledKey).(bool)
var ( // for invocation collection without notary
alphabet []common.IRNode
nodeKey []byte
)
if notaryDisabled {
alphabet = common.AlphabetNodes()
nodeKey = common.InnerRingInvoker(alphabet)
if len(nodeKey) == 0 {
panic("stopEstimation: only inner ring nodes can invoke this")
}
} else {
multiaddr := common.AlphabetAddress()
if !runtime.CheckWitness(multiaddr) {
panic("stopEstimation: only inner ring nodes can invoke this")
}
}
if notaryDisabled {
threshold := len(alphabet)*2/3 + 1
id := common.InvokeID([]interface{}{epoch}, []byte("stopEstimation"))
n := common.Vote(ctx, id, nodeKey)
if n < threshold {
return
}
common.RemoveVotes(ctx, id)
}
runtime.Notify("StopEstimation", epoch)
runtime.Log("stopEstimation: notification has been produced")
}
// Version returns version of the contract.
func Version() int {
return common.Version
}
func addContainer(ctx storage.Context, id, owner []byte, container Container) {
containerListKey := append(owner, id...)
storage.Put(ctx, containerListKey, id)
common.SetSerialized(ctx, id, container)
}
func removeContainer(ctx storage.Context, id []byte, owner []byte) {
containerListKey := append(owner, id...)
storage.Delete(ctx, containerListKey)
storage.Delete(ctx, id)
}
func getAllContainers(ctx storage.Context) [][]byte {
var list [][]byte
it := storage.Find(ctx, []byte{}, storage.KeysOnly)
for iterator.Next(it) {
key := iterator.Value(it).([]byte) // it MUST BE `storage.KeysOnly`
if len(key) == containerIDSize {
list = append(list, key)
}
}
return list
}
func getEACL(ctx storage.Context, cid []byte) ExtendedACL {
key := append(eACLPrefix, cid...)
data := storage.Get(ctx, key)
if data != nil {
return std.Deserialize(data.([]byte)).(ExtendedACL)
}
return ExtendedACL{value: []byte{}, sig: interop.Signature{}, pub: interop.PublicKey{}, token: []byte{}}
}
func getContainer(ctx storage.Context, cid []byte) Container {
data := storage.Get(ctx, cid)
if data != nil {
return std.Deserialize(data.([]byte)).(Container)
}
return Container{value: []byte{}, sig: interop.Signature{}, pub: interop.PublicKey{}, token: []byte{}}
}
func getOwnerByID(ctx storage.Context, cid []byte) []byte {
container := getContainer(ctx, cid)
return ownerFromBinaryContainer(container.value)
}
func ownerFromBinaryContainer(container []byte) []byte {
offset := int(container[1])
offset = 2 + offset + 4 // version prefix + version size + owner prefix
return container[offset : offset+25] // offset + size of owner
}
func estimationKey(epoch int, cid []byte, key interop.PublicKey) []byte {
var buf interface{} = epoch
hash := crypto.Ripemd160(key)
result := []byte(estimateKeyPrefix)
result = append(result, buf.([]byte)...)
result = append(result, cid...)
return append(result, hash[:estimatePostfixSize]...)
}
func getContainerSizeEstimation(ctx storage.Context, key, cid []byte) containerSizes {
var estimations []estimation
it := storage.Find(ctx, key, storage.ValuesOnly)
for iterator.Next(it) {
rawEstimation := iterator.Value(it).([]byte)
est := std.Deserialize(rawEstimation).(estimation)
estimations = append(estimations, est)
}
return containerSizes{
cid: cid,
estimations: estimations,
}
}
// isStorageNode looks into _previous_ epoch network map, because storage node
// announce container size estimation of previous epoch.
func isStorageNode(ctx storage.Context, key interop.PublicKey) bool {
netmapContractAddr := storage.Get(ctx, netmapContractKey).(interop.Hash160)
snapshot := contract.Call(netmapContractAddr, "snapshot", contract.ReadOnly, 1).([]storageNode)
for i := range snapshot {
nodeInfo := snapshot[i].info
nodeKey := nodeInfo[2:35] // offset:2, len:33
if common.BytesEqual(key, nodeKey) {
return true
}
}
return false
}
func keysToDelete(ctx storage.Context, epoch int) [][]byte {
results := [][]byte{}
it := storage.Find(ctx, []byte(estimateKeyPrefix), storage.KeysOnly)
for iterator.Next(it) {
k := iterator.Value(it).([]byte)
nbytes := k[len(estimateKeyPrefix) : len(k)-containerIDSize-estimatePostfixSize]
var n interface{} = nbytes
if epoch-n.(int) > cleanupDelta {
results = append(results, k)
}
}
return results
}