575 lines
13 KiB
Go
575 lines
13 KiB
Go
package netmapcontract
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import (
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"github.com/nspcc-dev/neo-go/pkg/interop"
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"github.com/nspcc-dev/neo-go/pkg/interop/contract"
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"github.com/nspcc-dev/neo-go/pkg/interop/iterator"
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"github.com/nspcc-dev/neo-go/pkg/interop/native/crypto"
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"github.com/nspcc-dev/neo-go/pkg/interop/native/management"
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"github.com/nspcc-dev/neo-go/pkg/interop/native/std"
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"github.com/nspcc-dev/neo-go/pkg/interop/runtime"
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"github.com/nspcc-dev/neo-go/pkg/interop/storage"
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"github.com/nspcc-dev/neofs-contract/common"
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)
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type (
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storageNode struct {
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info []byte
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}
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netmapNode struct {
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node storageNode
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state nodeState
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}
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nodeState int
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record struct {
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key []byte
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val []byte
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}
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)
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const (
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version = 1
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netmapKey = "netmap"
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configuredKey = "initconfig"
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notaryDisabledKey = "notary"
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innerRingKey = "innerring"
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snapshot0Key = "snapshotCurrent"
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snapshot1Key = "snapshotPrevious"
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snapshotEpoch = "snapshotEpoch"
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containerContractKey = "containerScriptHash"
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balanceContractKey = "balanceScriptHash"
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cleanupEpochMethod = "newEpoch"
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)
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const (
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_ nodeState = iota
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onlineState
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offlineState
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)
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var (
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configPrefix = []byte("config")
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candidatePrefix = []byte("candidate")
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)
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// _deploy function sets up initial list of inner ring public keys.
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func _deploy(data interface{}, isUpdate bool) {
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if isUpdate {
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return
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}
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args := data.([]interface{})
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notaryDisabled := args[0].(bool)
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owner := args[1].(interop.Hash160)
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addrBalance := args[2].(interop.Hash160)
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addrContainer := args[3].(interop.Hash160)
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keys := args[4].([]interop.PublicKey)
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ctx := storage.GetContext()
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if !common.HasUpdateAccess(ctx) {
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panic("only owner can reinitialize contract")
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}
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if len(addrBalance) != 20 || len(addrContainer) != 20 {
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panic("init: incorrect length of contract script hash")
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}
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storage.Put(ctx, common.OwnerKey, owner)
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// epoch number is a little endian int, it doesn't need to be serialized
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storage.Put(ctx, snapshotEpoch, 0)
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// simplified: this used for const sysfee in AddPeer method
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common.SetSerialized(ctx, netmapKey, []netmapNode{})
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common.SetSerialized(ctx, snapshot0Key, []netmapNode{})
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common.SetSerialized(ctx, snapshot1Key, []netmapNode{})
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storage.Put(ctx, balanceContractKey, addrBalance)
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storage.Put(ctx, containerContractKey, addrContainer)
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// initialize the way to collect signatures
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storage.Put(ctx, notaryDisabledKey, notaryDisabled)
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if notaryDisabled {
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var irList []common.IRNode
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for i := 0; i < len(keys); i++ {
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key := keys[i]
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irList = append(irList, common.IRNode{PublicKey: key})
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}
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common.SetSerialized(ctx, innerRingKey, irList)
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common.InitVote(ctx)
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runtime.Log("netmap contract notary disabled")
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}
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runtime.Log("netmap contract initialized")
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}
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func Migrate(script []byte, manifest []byte, data interface{}) bool {
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ctx := storage.GetReadOnlyContext()
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if !common.HasUpdateAccess(ctx) {
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runtime.Log("only owner can update contract")
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return false
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}
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contract.Call(interop.Hash160(management.Hash), "update", contract.All, script, manifest, data)
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runtime.Log("netmap contract updated")
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return true
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}
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func InnerRingList() []common.IRNode {
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ctx := storage.GetReadOnlyContext()
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return getIRNodes(ctx)
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}
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func UpdateInnerRing(keys []interop.PublicKey) {
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ctx := storage.GetContext()
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notaryDisabled := storage.Get(ctx, notaryDisabledKey).(bool)
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var ( // for invocation collection without notary
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alphabet []common.IRNode
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nodeKey []byte
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)
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if notaryDisabled {
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alphabet = common.AlphabetNodes()
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nodeKey = common.InnerRingInvoker(alphabet)
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if len(nodeKey) == 0 {
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panic("updateInnerRing: this method must be invoked by alphabet nodes")
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}
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} else {
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multiaddr := common.AlphabetAddress()
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if !runtime.CheckWitness(multiaddr) {
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panic("updateInnerRing: this method must be invoked by alphabet nodes")
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}
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}
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var irList []common.IRNode
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for i := 0; i < len(keys); i++ {
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key := keys[i]
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irList = append(irList, common.IRNode{PublicKey: key})
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}
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if notaryDisabled {
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threshold := len(alphabet)*2/3 + 1
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id := keysID(keys, []byte("updateIR"))
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n := common.Vote(ctx, id, nodeKey)
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if n < threshold {
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return
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}
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common.RemoveVotes(ctx, id)
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}
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runtime.Log("updateInnerRing: inner ring list updated")
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common.SetSerialized(ctx, innerRingKey, irList)
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}
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func AddPeer(nodeInfo []byte) {
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ctx := storage.GetContext()
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notaryDisabled := storage.Get(ctx, notaryDisabledKey).(bool)
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var ( // for invocation collection without notary
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alphabet []common.IRNode
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nodeKey []byte
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alphabetCall bool
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)
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if notaryDisabled {
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alphabet = common.AlphabetNodes()
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nodeKey = common.InnerRingInvoker(alphabet)
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alphabetCall = len(nodeKey) != 0
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} else {
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multiaddr := common.AlphabetAddress()
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alphabetCall = runtime.CheckWitness(multiaddr)
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}
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if !alphabetCall {
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publicKey := nodeInfo[2:35] // offset:2, len:33
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if !runtime.CheckWitness(publicKey) {
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panic("addPeer: witness check failed")
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}
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runtime.Notify("AddPeer", nodeInfo)
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return
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}
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candidate := storageNode{
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info: nodeInfo,
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}
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if notaryDisabled {
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threshold := len(alphabet)*2/3 + 1
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rawCandidate := std.Serialize(candidate)
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id := crypto.Sha256(rawCandidate)
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n := common.Vote(ctx, id, nodeKey)
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if n < threshold {
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return
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}
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common.RemoveVotes(ctx, id)
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}
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addToNetmap(ctx, candidate)
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}
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func UpdateState(state int, publicKey interop.PublicKey) {
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if len(publicKey) != 33 {
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panic("updateState: incorrect public key")
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}
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ctx := storage.GetContext()
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notaryDisabled := storage.Get(ctx, notaryDisabledKey).(bool)
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var ( // for invocation collection without notary
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alphabet []common.IRNode
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nodeKey []byte
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alphabetCall bool
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)
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if notaryDisabled {
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alphabet = common.AlphabetNodes()
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nodeKey = common.InnerRingInvoker(alphabet)
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alphabetCall = len(nodeKey) != 0
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} else {
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multiaddr := common.AlphabetAddress()
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alphabetCall = runtime.CheckWitness(multiaddr)
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}
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if !alphabetCall {
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if !runtime.CheckWitness(publicKey) {
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panic("updateState: witness check failed")
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}
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runtime.Notify("UpdateState", state, publicKey)
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return
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}
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if notaryDisabled {
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threshold := len(alphabet)*2/3 + 1
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id := common.InvokeID([]interface{}{state, publicKey}, []byte("update"))
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n := common.Vote(ctx, id, nodeKey)
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if n < threshold {
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return
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}
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common.RemoveVotes(ctx, id)
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}
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switch nodeState(state) {
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case offlineState:
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removeFromNetmap(ctx, publicKey)
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runtime.Log("updateState: remove storage node from the network map")
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default:
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panic("updateState: unsupported state")
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}
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}
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func NewEpoch(epochNum int) {
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ctx := storage.GetContext()
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notaryDisabled := storage.Get(ctx, notaryDisabledKey).(bool)
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var ( // for invocation collection without notary
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alphabet []common.IRNode
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nodeKey []byte
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)
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if notaryDisabled {
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alphabet = common.AlphabetNodes()
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nodeKey = common.InnerRingInvoker(alphabet)
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if len(nodeKey) == 0 {
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panic("newEpoch: this method must be invoked by inner ring nodes")
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}
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} else {
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multiaddr := common.AlphabetAddress()
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if !runtime.CheckWitness(multiaddr) {
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panic("newEpoch: this method must be invoked by inner ring nodes")
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}
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}
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if notaryDisabled {
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threshold := len(alphabet)*2/3 + 1
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id := common.InvokeID([]interface{}{epochNum}, []byte("epoch"))
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n := common.Vote(ctx, id, nodeKey)
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if n < threshold {
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return
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}
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common.RemoveVotes(ctx, id)
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}
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currentEpoch := storage.Get(ctx, snapshotEpoch).(int)
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if epochNum <= currentEpoch {
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panic("invalid epoch") // ignore invocations with invalid epoch
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}
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data0snapshot := getSnapshot(ctx, snapshot0Key)
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dataOnlineState := filterNetmap(ctx, onlineState)
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runtime.Log("newEpoch: process new epoch")
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// todo: check if provided epoch number is bigger than current
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storage.Put(ctx, snapshotEpoch, epochNum)
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// put actual snapshot into previous snapshot
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common.SetSerialized(ctx, snapshot1Key, data0snapshot)
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// put netmap into actual snapshot
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common.SetSerialized(ctx, snapshot0Key, dataOnlineState)
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// make clean up routines in other contracts
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cleanup(ctx, epochNum)
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runtime.Notify("NewEpoch", epochNum)
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}
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func Epoch() int {
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ctx := storage.GetReadOnlyContext()
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return storage.Get(ctx, snapshotEpoch).(int)
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}
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func Netmap() []storageNode {
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ctx := storage.GetReadOnlyContext()
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return getSnapshot(ctx, snapshot0Key)
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}
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// NetmapCandidates returns all node candidates for next epoch and their
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// status codes.
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func NetmapCandidates() []netmapNode {
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ctx := storage.GetReadOnlyContext()
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return getNetmapNodes(ctx)
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}
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func Snapshot(diff int) []storageNode {
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var key string
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switch diff {
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case 0:
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key = snapshot0Key
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case 1:
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key = snapshot1Key
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default:
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panic("snapshot: incorrect diff")
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}
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ctx := storage.GetReadOnlyContext()
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return getSnapshot(ctx, key)
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}
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func SnapshotByEpoch(epoch int) []storageNode {
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ctx := storage.GetReadOnlyContext()
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currentEpoch := storage.Get(ctx, snapshotEpoch).(int)
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return Snapshot(currentEpoch - epoch)
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}
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func Config(key []byte) interface{} {
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ctx := storage.GetReadOnlyContext()
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return getConfig(ctx, key)
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}
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func SetConfig(id, key, val []byte) {
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ctx := storage.GetContext()
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notaryDisabled := storage.Get(ctx, notaryDisabledKey).(bool)
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var ( // for invocation collection without notary
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alphabet []common.IRNode
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nodeKey []byte
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)
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if notaryDisabled {
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alphabet = common.AlphabetNodes()
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nodeKey = common.InnerRingInvoker(alphabet)
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if len(nodeKey) == 0 {
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panic("setConfig: invoked by non inner ring node")
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}
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} else {
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multiaddr := common.AlphabetAddress()
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if !runtime.CheckWitness(multiaddr) {
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panic("setConfig: invoked by non inner ring node")
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}
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}
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if notaryDisabled {
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threshold := len(alphabet)*2/3 + 1
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n := common.Vote(ctx, id, nodeKey)
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if n < threshold {
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return
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}
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common.RemoveVotes(ctx, id)
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}
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setConfig(ctx, key, val)
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runtime.Log("setConfig: configuration has been updated")
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}
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func InitConfig(args [][]byte) {
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ctx := storage.GetContext()
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if storage.Get(ctx, configuredKey) != nil {
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panic("netmap: configuration already installed")
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}
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ln := len(args)
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if ln%2 != 0 {
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panic("initConfig: bad arguments")
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}
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for i := 0; i < ln/2; i++ {
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key := args[i*2]
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val := args[i*2+1]
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setConfig(ctx, key, val)
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}
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storage.Put(ctx, configuredKey, true)
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runtime.Log("netmap: config has been installed")
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}
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func ListConfig() []record {
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ctx := storage.GetReadOnlyContext()
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var config []record
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it := storage.Find(ctx, configPrefix, storage.None)
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for iterator.Next(it) {
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pair := iterator.Value(it).([]interface{})
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key := pair[0].([]byte)
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val := pair[1].([]byte)
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r := record{key: key[len(configPrefix):], val: val}
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config = append(config, r)
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}
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return config
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}
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func Version() int {
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return version
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}
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func addToNetmap(ctx storage.Context, n storageNode) {
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var (
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newNode = n.info
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newNodeKey = newNode[2:35]
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storageKey = append(candidatePrefix, newNodeKey...)
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node = netmapNode{
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node: n,
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state: onlineState,
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}
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)
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data := storage.Get(ctx, storageKey)
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if data != nil {
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return
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}
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storage.Put(ctx, storageKey, std.Serialize(node))
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}
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func removeFromNetmap(ctx storage.Context, key interop.PublicKey) {
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storageKey := append(candidatePrefix, key...)
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storage.Delete(ctx, storageKey)
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}
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func filterNetmap(ctx storage.Context, st nodeState) []storageNode {
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var (
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netmap = getNetmapNodes(ctx)
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result = []storageNode{}
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)
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for i := 0; i < len(netmap); i++ {
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item := netmap[i]
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if item.state == st {
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result = append(result, item.node)
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}
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}
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return result
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}
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func getNetmapNodes(ctx storage.Context) []netmapNode {
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result := []netmapNode{}
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it := storage.Find(ctx, candidatePrefix, storage.ValuesOnly)
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for iterator.Next(it) {
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rawNode := iterator.Value(it).([]byte)
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node := std.Deserialize(rawNode).(netmapNode)
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result = append(result, node)
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}
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return result
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}
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func getSnapshot(ctx storage.Context, key string) []storageNode {
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data := storage.Get(ctx, key)
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if data != nil {
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return std.Deserialize(data.([]byte)).([]storageNode)
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}
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return []storageNode{}
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}
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func getConfig(ctx storage.Context, key interface{}) interface{} {
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postfix := key.([]byte)
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storageKey := append(configPrefix, postfix...)
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return storage.Get(ctx, storageKey)
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}
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func setConfig(ctx storage.Context, key, val interface{}) {
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postfix := key.([]byte)
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storageKey := append(configPrefix, postfix...)
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storage.Put(ctx, storageKey, val)
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}
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func cleanup(ctx storage.Context, epoch int) {
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balanceContractAddr := storage.Get(ctx, balanceContractKey).(interop.Hash160)
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contract.Call(balanceContractAddr, cleanupEpochMethod, contract.All, epoch)
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containerContractAddr := storage.Get(ctx, containerContractKey).(interop.Hash160)
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contract.Call(containerContractAddr, cleanupEpochMethod, contract.All, epoch)
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}
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func getIRNodes(ctx storage.Context) []common.IRNode {
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data := storage.Get(ctx, innerRingKey)
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if data != nil {
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return std.Deserialize(data.([]byte)).([]common.IRNode)
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}
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return []common.IRNode{}
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}
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func keysID(args []interop.PublicKey, prefix []byte) []byte {
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var (
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result []byte
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)
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result = append(result, prefix...)
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for i := range args {
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result = append(result, args[i]...)
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}
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return crypto.Sha256(result)
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}
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