Collect "InnerRingUpdate" calls from inner ring nodes
Inner ring nodes do not collect signatures for the cheque now. Instead they invoke "InnerRingUpdate" method and smart-contract checks if method was called from inner ring node. Then it accepts cheque if there were 2/3n+1 invokes.
This commit is contained in:
alexvanin
parent
78b8af8f83
commit
4fbfa1bc98
1 changed files with 125 additions and 50 deletions
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@ -8,21 +8,29 @@ import (
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"github.com/nspcc-dev/neo-go/pkg/interop/util"
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)
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type node struct {
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pub []byte
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}
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type (
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ballot struct {
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id []byte
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n int
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}
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type check struct {
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id []byte
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height []byte
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}
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node struct {
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pub []byte
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}
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// GAS NEP-5 HASH
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const tokenHash = "\x77\xea\x59\x6b\x7a\xdf\x7e\x4d\xd1\x40\x76\x97\x31\xb7\xd2\xf0\xe0\x6b\xcd\x9b"
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check struct {
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id []byte
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height []byte
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}
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)
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const innerRingCandidateFee = 100 * 1000 * 1000 // 10^8
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const version = 1
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const (
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// GAS NEP-5 HASH
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tokenHash = "\x77\xea\x59\x6b\x7a\xdf\x7e\x4d\xd1\x40\x76\x97\x31\xb7\xd2\xf0\xe0\x6b\xcd\x9b"
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innerRingCandidateFee = 100 * 1000 * 1000 // 10^8
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version = 1
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voteKey = "ballots"
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)
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func Main(op string, args []interface{}) interface{} {
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// The trigger determines whether this smart-contract is being
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@ -75,6 +83,9 @@ func Main(op string, args []interface{}) interface{} {
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storage.Put(ctx, "UsedVerifCheckList", data)
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storage.Put(ctx, "InnerRingCandidates", data)
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data = runtime.Serialize([]ballot{})
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storage.Put(ctx, voteKey, data)
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return true
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case "InnerRingList":
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irList := getSerialized(ctx, "InnerRingList").([]node)
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@ -181,60 +192,66 @@ func Main(op string, args []interface{}) interface{} {
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listSize := listItemCount * 33
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offset := 8 + 2 + listSize
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msg := data[:offset]
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message := crypto.SHA256(msg)
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irList := getSerialized(ctx, "InnerRingList").([]node)
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if !verifySignatures(irList, data, message, offset) {
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panic("can't verify signatures")
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}
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usedList := getSerialized(ctx, "UsedVerifCheckList").([]check)
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c := check{
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id: id,
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height: []byte{1}, // ir update cheques use height as id
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threshold := len(irList)/3*2 + 1
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if !isInnerRingRequest(irList) {
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panic("innerRingUpdate: invoked by non inner ring node")
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}
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c := check{id: id}
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if containsCheck(usedList, c) {
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panic("check has already been used")
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panic("innerRingUpdate: cheque has non unique id")
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}
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candidates := getSerialized(ctx, "InnerRingCandidates").([]node)
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offset = 10
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newIR := []node{}
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chequeHash := crypto.Hash256(data)
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loop:
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for i := 0; i < listItemCount; i, offset = i+1, offset+33 {
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pub := data[offset : offset+33]
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n := vote(ctx, chequeHash)
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if n >= threshold {
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removeVotes(ctx, chequeHash)
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for j := 0; j < len(irList); j++ {
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n := irList[j]
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if util.Equals(n.pub, pub) {
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newIR = append(newIR, n)
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continue loop
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candidates := getSerialized(ctx, "InnerRingCandidates").([]node)
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offset = 10
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newIR := []node{}
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loop:
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for i := 0; i < listItemCount; i, offset = i+1, offset+33 {
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pub := data[offset : offset+33]
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for j := 0; j < len(irList); j++ {
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n := irList[j]
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if util.Equals(n.pub, pub) {
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newIR = append(newIR, n)
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continue loop
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}
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}
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for j := 0; j < len(candidates); j++ {
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n := candidates[j]
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if util.Equals(n.pub, pub) {
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newIR = append(newIR, n)
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continue loop
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}
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}
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}
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for j := 0; j < len(candidates); j++ {
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n := candidates[j]
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if util.Equals(n.pub, pub) {
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newIR = append(newIR, n)
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continue loop
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}
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if len(newIR) != listItemCount {
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panic("new inner ring wasn't processed correctly")
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}
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}
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if len(newIR) != listItemCount {
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panic("new inner ring wasn't processed correctly")
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}
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for i := 0; i < len(newIR); i++ {
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n := newIR[i]
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delSerializedIR(ctx, "InnerRingCandidates", n.pub)
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}
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for i := 0; i < len(newIR); i++ {
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n := newIR[i]
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delSerializedIR(ctx, "InnerRingCandidates", n.pub)
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}
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newIRData := runtime.Serialize(newIR)
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storage.Put(ctx, "InnerRingList", newIRData)
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putSerialized(ctx, "UsedVerifCheckList", c)
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newIRData := runtime.Serialize(newIR)
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storage.Put(ctx, "InnerRingList", newIRData)
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putSerialized(ctx, "UsedVerifCheckList", c)
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runtime.Notify("InnerRingUpdate", c.id, newIRData)
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}
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return true
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case "IsInnerRing":
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@ -405,3 +422,61 @@ func verifySignatures(irList []node, data []byte, message []byte, offset int) bo
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runtime.Log("not enough verified signatures")
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return false
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}
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// isInnerRingRequest returns true if contract was invoked by inner ring node.
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func isInnerRingRequest(irList []node) bool {
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for i := 0; i < len(irList); i++ {
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irNode := irList[i]
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if runtime.CheckWitness(irNode.pub) {
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return true
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}
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}
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return false
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}
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// todo: votes must be from unique inner ring nods
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func vote(ctx storage.Context, id []byte) int {
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var (
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newCandidates = []ballot{}
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candidates = getSerialized(ctx, voteKey).([]ballot)
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found = -1
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)
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for i := 0; i < len(candidates); i++ {
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cnd := candidates[i]
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if util.Equals(cnd.id, id) {
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cnd = ballot{id: id, n: cnd.n + 1}
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found = cnd.n
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}
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newCandidates = append(newCandidates, cnd)
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}
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if found < 0 {
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newCandidates = append(newCandidates, ballot{id: id, n: 1})
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found = 1
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}
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data := runtime.Serialize(newCandidates)
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storage.Put(ctx, voteKey, data)
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return found
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}
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func removeVotes(ctx storage.Context, id []byte) {
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var (
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newCandidates = []ballot{}
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candidates = getSerialized(ctx, voteKey).([]ballot)
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)
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for i := 0; i < len(candidates); i++ {
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cnd := candidates[i]
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if !util.Equals(cnd.id, id) {
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newCandidates = append(newCandidates, cnd)
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}
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}
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data := runtime.Serialize(newCandidates)
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storage.Put(ctx, voteKey, data)
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}
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