frostfs-contract/reputation/reputation_contract.go

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package reputation
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/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"
)
const (
notaryDisabledKey = "notary"
version = 1
)
func _deploy(data interface{}, isUpdate bool) {
if isUpdate {
return
}
args := data.([]interface{})
notaryDisabled := args[0].(bool)
owner := args[1].(interop.Hash160)
ctx := storage.GetContext()
if !common.HasUpdateAccess(ctx) {
panic("only owner can reinitialize contract")
}
storage.Put(ctx, common.OwnerKey, owner)
// initialize the way to collect signatures
storage.Put(ctx, notaryDisabledKey, notaryDisabled)
if notaryDisabled {
common.InitVote(ctx)
runtime.Log("reputation contract notary disabled")
}
runtime.Log("reputation contract initialized")
}
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("reputation contract updated")
return true
}
func Put(epoch int, peerID []byte, value []byte) {
ctx := storage.GetContext()
notaryDisabled := storage.Get(ctx, notaryDisabledKey).(bool)
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("reputationPut", epoch, peerID, value)
return
}
id := storageID(epoch, peerID)
reputationValues := GetByID(id)
reputationValues = append(reputationValues, value)
rawValues := std.Serialize(reputationValues)
if notaryDisabled {
threshold := len(alphabet)*2/3 + 1
n := common.Vote(ctx, id, nodeKey)
if n < threshold {
return
}
common.RemoveVotes(ctx, id)
}
storage.Put(ctx, id, rawValues)
}
func Get(epoch int, peerID []byte) [][]byte {
id := storageID(epoch, peerID)
return GetByID(id)
}
func GetByID(id []byte) [][]byte {
ctx := storage.GetReadOnlyContext()
data := storage.Get(ctx, id)
if data == nil {
return [][]byte{}
}
return std.Deserialize(data.([]byte)).([][]byte)
}
// ListByEpoch returns list of IDs that may be used to get reputation data
// via GetByID method.
func ListByEpoch(epoch int) [][]byte {
ctx := storage.GetReadOnlyContext()
var buf interface{} = epoch
it := storage.Find(ctx, buf.([]byte), storage.KeysOnly)
var result [][]byte
ignore := [][]byte{
[]byte(common.OwnerKey),
[]byte(notaryDisabledKey),
}
loop:
for iterator.Next(it) {
key := iterator.Value(it).([]byte) // iterator MUST BE `storage.KeysOnly`
for _, ignoreKey := range ignore {
if common.BytesEqual(key, ignoreKey) {
continue loop
}
}
result = append(result, key)
}
return result
}
func Version() int {
return version
}
func storageID(epoch int, peerID []byte) []byte {
var buf interface{} = epoch
return append(buf.([]byte), peerID...)
}