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[#51] alphabet: Support notary contract

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Signed-off-by: Alex Vanin <alexey@nspcc.ru>
This commit is contained in:
Alex Vanin 2021-02-19 18:04:33 +03:00 committed by Alex Vanin
parent 7fbf6d73b0
commit 299c888266
1 changed files with 35 additions and 117 deletions
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132
alphabet/alphabet_contract.go
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@ -2,9 +2,7 @@ package alphabetcontract
import (
"github.com/nspcc-dev/neo-go/pkg/interop"
"github.com/nspcc-dev/neo-go/pkg/interop/binary"
"github.com/nspcc-dev/neo-go/pkg/interop/contract"
"github.com/nspcc-dev/neo-go/pkg/interop/crypto"
"github.com/nspcc-dev/neo-go/pkg/interop/native/gas"
"github.com/nspcc-dev/neo-go/pkg/interop/native/management"
"github.com/nspcc-dev/neo-go/pkg/interop/native/neo"
@ -15,10 +13,13 @@ import (
const (
netmapKey = "netmapScriptHash"
proxyKey = "proxyScriptHash"
indexKey = "index"
totalKey = "threshold"
nameKey = "name"
voteKey = "ballots"
version = 1
)
var ctx storage.Context
@ -35,23 +36,22 @@ func OnNEP17Payment(from interop.Hash160, amount int, data interface{}) {
}
}
func Init(owner interop.Hash160, addrNetmap []byte, name string, index, total int) {
func Init(owner interop.Hash160, addrNetmap, addrProxy interop.Hash160, name string, index, total int) {
if !common.HasUpdateAccess(ctx) {
panic("only owner can reinitialize contract")
}
if len(addrNetmap) != 20 {
if len(addrNetmap) != 20 || len(addrProxy) != 20 {
panic("incorrect length of contract script hash")
}
storage.Put(ctx, common.OwnerKey, owner)
storage.Put(ctx, netmapKey, addrNetmap)
storage.Put(ctx, proxyKey, addrProxy)
storage.Put(ctx, nameKey, name)
storage.Put(ctx, indexKey, index)
storage.Put(ctx, totalKey, total)
common.SetSerialized(ctx, voteKey, []common.Ballot{})
runtime.Log(name + " contract initialized")
}
@ -115,35 +115,40 @@ func Emit() bool {
contractHash := runtime.GetExecutingScriptHash()
_ = neo.Transfer(contractHash, contractHash, neo.BalanceOf(contractHash), nil)
neo.Transfer(contractHash, contractHash, neo.BalanceOf(contractHash), nil)
gasBalance := gas.BalanceOf(contractHash)
gasPerNode := gasBalance * 7 / 8 / len(innerRingKeys)
proxyAddr := storage.Get(ctx, proxyKey).(interop.Hash160)
if gasPerNode == 0 {
proxyGas := gasBalance / 2
if proxyGas == 0 {
runtime.Log("no gas to emit")
return false
}
for i := range innerRingKeys {
node := innerRingKeys[i]
address := contract.CreateStandardAccount(node.PublicKey)
gas.Transfer(contractHash, proxyAddr, proxyGas, nil)
runtime.Log("utility token has been emitted to proxy contract")
_ = gas.Transfer(contractHash, address, gasPerNode, nil)
gasPerNode := gasBalance / 2 * 7 / 8 / len(innerRingKeys)
if gasPerNode != 0 {
for _, node := range innerRingKeys {
address := contract.CreateStandardAccount(node.PublicKey)
gas.Transfer(contractHash, address, gasPerNode, nil)
}
runtime.Log("utility token has been emitted to inner ring nodes")
}
return true
}
func Vote(epoch int, candidates [][]byte) {
innerRingKeys := irList()
threshold := total()/3*2 + 1
index := index()
name := name()
key := common.InnerRingInvoker(innerRingKeys)
if len(key) == 0 {
multiaddr := common.InnerRingMultiAddressViaStorage(ctx, netmapKey)
if !runtime.CheckWitness(multiaddr) {
panic("invalid invoker")
}
@ -152,23 +157,15 @@ func Vote(epoch int, candidates [][]byte) {
panic("invalid epoch")
}
id := voteID(epoch, candidates)
n := vote(ctx, curEpoch, id, key)
if n >= threshold {
candidate := candidates[index%len(candidates)]
address := runtime.GetExecutingScriptHash()
ok := neo.Vote(address, candidate)
if ok {
runtime.Log(name + ": successfully voted for validator")
removeVotes(ctx, id)
} else {
runtime.Log(name + ": vote has been failed")
}
} else {
runtime.Log(name + ": saved vote for validator")
}
return
}
@ -177,85 +174,6 @@ func Name() string {
return name()
}
func vote(ctx storage.Context, epoch int, id, from []byte) int {
var (
newCandidates []common.Ballot
candidates = getBallots(ctx)
found = -1
)
for i := 0; i < len(candidates); i++ {
cnd := candidates[i]
if common.BytesEqual(cnd.ID, id) {
voters := cnd.Voters
for j := range voters {
if common.BytesEqual(voters[j], from) {
return len(voters)
}
}
voters = append(voters, from)
cnd = common.Ballot{ID: id, Voters: voters, Height: epoch}
found = len(voters)
}
// add only valid ballots with current epochs
if cnd.Height == epoch {
newCandidates = append(newCandidates, cnd)
}
}
if found < 0 {
voters := [][]byte{from}
newCandidates = append(newCandidates, common.Ballot{
ID: id,
Voters: voters,
Height: epoch})
found = 1
}
common.SetSerialized(ctx, voteKey, newCandidates)
return found
}
func removeVotes(ctx storage.Context, id []byte) {
var (
newCandidates []common.Ballot
candidates = getBallots(ctx)
)
for i := 0; i < len(candidates); i++ {
cnd := candidates[i]
if !common.BytesEqual(cnd.ID, id) {
newCandidates = append(newCandidates, cnd)
}
}
common.SetSerialized(ctx, voteKey, newCandidates)
}
func getBallots(ctx storage.Context) []common.Ballot {
data := storage.Get(ctx, voteKey)
if data != nil {
return binary.Deserialize(data.([]byte)).([]common.Ballot)
}
return []common.Ballot{}
}
func voteID(epoch interface{}, args [][]byte) []byte {
var (
result []byte
epochBytes = epoch.([]byte)
)
result = append(result, epochBytes...)
for i := range args {
result = append(result, args[i]...)
}
return crypto.SHA256(result)
func Version() int {
return version
}