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" nnsContractKey = "nnsScriptHash" nnsRootKey = "nnsRoot" nnsHasAliasKey = "nnsHasAlias" notaryDisabledKey = "notary" // RegistrationFeeKey is a key in netmap config which contains fee for container registration. RegistrationFeeKey = "ContainerFee" // AliasFeeKey is a key in netmap config which contains fee for nice-name registration. AliasFeeKey = "ContainerAliasFee" // V2 format containerIDSize = 32 // SHA256 size estimateKeyPrefix = "cnr" estimatePostfixSize = 10 cleanupDelta = 3 // NotFoundError is returned if container is missing. NotFoundError = "container does not exist" // default SOA record field values defaultRefresh = 3600 // 1 hour defaultRetry = 600 // 10 min defaultExpire = 604800 // 1 week defaultTTL = 3600 // 1 hour ) var ( eACLPrefix = []byte("eACL") ) // OnNEP11Payment is needed for registration with contract as owner to work. func OnNEP11Payment(a interop.Hash160, b int, c []byte, d interface{}) { } func _deploy(data interface{}, isUpdate bool) { ctx := storage.GetContext() args := data.(struct { notaryDisabled bool addrNetmap interop.Hash160 addrBalance interop.Hash160 addrID interop.Hash160 addrNNS interop.Hash160 nnsRoot string }) if isUpdate { return } if len(args.addrNetmap) != interop.Hash160Len || len(args.addrBalance) != interop.Hash160Len || len(args.addrID) != interop.Hash160Len { panic("incorrect length of contract script hash") } storage.Put(ctx, netmapContractKey, args.addrNetmap) storage.Put(ctx, balanceContractKey, args.addrBalance) storage.Put(ctx, neofsIDContractKey, args.addrID) storage.Put(ctx, nnsContractKey, args.addrNNS) storage.Put(ctx, nnsRootKey, args.nnsRoot) // initialize the way to collect signatures storage.Put(ctx, notaryDisabledKey, args.notaryDisabled) if args.notaryDisabled { common.InitVote(ctx) runtime.Log("container contract notary disabled") } // add NNS root for container alias domains registerNiceNameTLD(args.addrNNS, args.nnsRoot) runtime.Log("container contract initialized") } func registerNiceNameTLD(addrNNS interop.Hash160, nnsRoot string) { isAvail := contract.Call(addrNNS, "isAvailable", contract.AllowCall|contract.ReadStates, "container").(bool) if !isAvail { return } res := contract.Call(addrNNS, "register", contract.All, nnsRoot, runtime.GetExecutingScriptHash(), "ops@nspcc.ru", defaultRefresh, defaultRetry, defaultExpire, defaultTTL).(bool) if !res { panic("can't register NNS TLD") } } // Update method updates contract source code and manifest. Can be invoked // only by committee. func Update(script []byte, manifest []byte, data interface{}) { if !common.HasUpdateAccess() { panic("only committee can update contract") } contract.Call(interop.Hash160(management.Hash), "update", contract.All, script, manifest, common.AppendVersion(data)) runtime.Log("container contract updated") } // 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) { PutNamed(container, signature, publicKey, token, "", "") } // PutNamed is similar to put but also sets a TXT record in nns contract. // Note that zone must exist. func PutNamed(container []byte, signature interop.Signature, publicKey interop.PublicKey, token []byte, name, zone string) { 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 ( needRegister bool nnsContractAddr interop.Hash160 domain string ) if name != "" { if zone == "" { zone = storage.Get(ctx, nnsRootKey).(string) } nnsContractAddr = storage.Get(ctx, nnsContractKey).(interop.Hash160) domain = name + "." + zone needRegister = checkNiceNameAvailable(nnsContractAddr, domain) } alphabet := common.AlphabetNodes() 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, RegistrationFeeKey).(int) balance := contract.Call(balanceContractAddr, "balanceOf", contract.ReadOnly, from).(int) if name != "" { aliasFee := contract.Call(netmapContractAddr, "config", contract.ReadOnly, AliasFeeKey).(int) containerFee += aliasFee } if balance < containerFee*len(alphabet) { panic("insufficient balance to create container") } if notaryDisabled { nodeKey := common.InnerRingInvoker(alphabet) if len(nodeKey) == 0 { runtime.Notify("containerPut", container, signature, publicKey, token) return } 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) } else { multiaddr := common.AlphabetAddress() common.CheckAlphabetWitness(multiaddr) } // todo: check if new container with unique container id details := common.ContainerFeeTransferDetails(containerID) 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 name != "" { if needRegister { res := contract.Call(nnsContractAddr, "register", contract.All, domain, runtime.GetExecutingScriptHash(), "ops@nspcc.ru", defaultRefresh, defaultRetry, defaultExpire, defaultTTL).(bool) if !res { panic("can't register the domain " + domain) } } contract.Call(nnsContractAddr, "addRecord", contract.All, domain, 16 /* TXT */, std.Base58Encode(containerID)) key := append([]byte(nnsHasAliasKey), containerID...) storage.Put(ctx, key, domain) } if len(token) == 0 { // if container created directly without session contract.Call(neofsIDContractAddr, "addKey", contract.All, ownerID, [][]byte{publicKey}) } runtime.Log("added new container") } // checkNiceNameAvailable checks if nice name is available for the container. // It panics if the name is taken. Returned value specifies if new domain registration is needed. func checkNiceNameAvailable(nnsContractAddr interop.Hash160, domain string) bool { isAvail := contract.Call(nnsContractAddr, "isAvailable", contract.ReadStates|contract.AllowCall, domain).(bool) if isAvail { return true } owner := contract.Call(nnsContractAddr, "ownerOf", contract.ReadStates|contract.AllowCall, domain).(string) if owner != string(common.CommitteeAddress()) && owner != string(runtime.GetExecutingScriptHash()) { panic("committee or container contract must own registered domain") } res := contract.Call(nnsContractAddr, "getRecords", contract.ReadStates|contract.AllowCall, domain, 16 /* TXT */) if res != nil { panic("name is already taken") } return false } // 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. // // If a container doesn't exist it panics with NotFoundError. func Delete(containerID []byte, signature interop.Signature, token []byte) { ctx := storage.GetContext() notaryDisabled := storage.Get(ctx, notaryDisabledKey).(bool) ownerID := getOwnerByID(ctx, containerID) if ownerID == nil { return } if notaryDisabled { alphabet := common.AlphabetNodes() nodeKey := common.InnerRingInvoker(alphabet) if len(nodeKey) == 0 { runtime.Notify("containerDelete", containerID, signature, token) return } 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) } else { multiaddr := common.AlphabetAddress() common.CheckAlphabetWitness(multiaddr) } key := append([]byte(nnsHasAliasKey), containerID...) domain := storage.Get(ctx, key).(string) if len(domain) != 0 { storage.Delete(ctx, key) // We should do `getRecord` first because NNS record could be deleted // by other means (expiration, manual) thus leading to failing `deleteRecord` // and inability to delete container. We should also check that we own the record in case. nnsContractAddr := storage.Get(ctx, nnsContractKey).(interop.Hash160) res := contract.Call(nnsContractAddr, "getRecords", contract.ReadStates|contract.AllowCall, domain, 16 /* TXT */) if res != nil && std.Base58Encode(containerID) == string(res.([]interface{})[0].(string)) { contract.Call(nnsContractAddr, "deleteRecords", contract.All, domain, 16 /* TXT */) } } removeContainer(ctx, containerID, ownerID) runtime.Log("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. // // If a container doesn't exist it panics with NotFoundError. func Get(containerID []byte) Container { ctx := storage.GetReadOnlyContext() cnt := getContainer(ctx, containerID) if len(cnt.value) == 0 { panic(NotFoundError) } return cnt } // Owner method returns 25 byte Owner ID of the container. // // If a container doesn't exist it panics with NotFoundError. func Owner(containerID []byte) []byte { ctx := storage.GetReadOnlyContext() owner := getOwnerByID(ctx, containerID) if owner == nil { panic(NotFoundError) } return owner } // 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. // // If a container doesn't exist it panics with NotFoundError. func SetEACL(eACL []byte, signature interop.Signature, publicKey interop.PublicKey, token []byte) { ctx := storage.GetContext() notaryDisabled := storage.Get(ctx, notaryDisabledKey).(bool) // V2 format // get container ID offset := int(eACL[1]) offset = 2 + offset + 4 containerID := eACL[offset : offset+32] ownerID := getOwnerByID(ctx, containerID) if ownerID == nil { panic(NotFoundError) } if notaryDisabled { alphabet := common.AlphabetNodes() nodeKey := common.InnerRingInvoker(alphabet) if len(nodeKey) == 0 { runtime.Notify("setEACL", eACL, signature, publicKey, token) return } 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) } else { multiaddr := common.AlphabetAddress() common.CheckAlphabetWitness(multiaddr) } rule := ExtendedACL{ value: eACL, sig: signature, pub: publicKey, token: token, } key := append(eACLPrefix, containerID...) common.SetSerialized(ctx, key, rule) runtime.Log("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. // // If a container doesn't exist it panics with NotFoundError. func EACL(containerID []byte) ExtendedACL { ctx := storage.GetReadOnlyContext() ownerID := getOwnerByID(ctx, containerID) if ownerID == nil { panic(NotFoundError) } 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. // // If a container doesn't exist it panics with NotFoundError. func PutContainerSize(epoch int, cid []byte, usedSize int, pubKey interop.PublicKey) { ctx := storage.GetContext() if getOwnerByID(ctx, cid) == nil { panic(NotFoundError) } common.CheckWitness(pubKey) if !isStorageNode(ctx, pubKey) { panic("method must be invoked by storage node from network map") } key := estimationKey(epoch, cid, pubKey) s := estimation{ from: pubKey, size: usedSize, } storage.Put(ctx, key, std.Serialize(s)) runtime.Log("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() // V2 format // 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("method must be invoked by inner ring") } } else { multiaddr := common.AlphabetAddress() common.CheckAlphabetWitness(multiaddr) } 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("method must be invoked by inner ring") } } else { multiaddr := common.AlphabetAddress() common.CheckAlphabetWitness(multiaddr) } 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("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("method must be invoked by inner ring") } } else { multiaddr := common.AlphabetAddress() common.CheckAlphabetWitness(multiaddr) } 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("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` // V2 format 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) if len(container.value) == 0 { return nil } return ownerFromBinaryContainer(container.value) } func ownerFromBinaryContainer(container []byte) []byte { // V2 format 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|storage.DeserializeValues) for iterator.Next(it) { est := iterator.Value(it).(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 { // V2 format 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) // V2 format nbytes := k[len(estimateKeyPrefix) : len(k)-containerIDSize-estimatePostfixSize] var n interface{} = nbytes if epoch-n.(int) > cleanupDelta { results = append(results, k) } } return results }