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/convert"
"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/runtime"
"github.com/nspcc-dev/neo-go/pkg/interop/storage"
"github.com/nspcc-dev/neofs-contract/common"
)
const (
notaryDisabledKey = "notary"
reputationValuePrefix = 'r'
reputationCountPrefix = 'c'
)
func _deploy(data interface{}, isUpdate bool) {
ctx := storage.GetContext()
if isUpdate {
args := data.([]interface{})
common.CheckVersion(args[len(args)-1].(int))
return
}
args := data.(struct {
notaryDisabled bool
})
// initialize the way to collect signatures
storage.Put(ctx, notaryDisabledKey, args.notaryDisabled)
if args.notaryDisabled {
common.InitVote(ctx)
runtime.Log("reputation contract notary disabled")
}
runtime.Log("reputation contract initialized")
}
// 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("reputation contract updated")
}
// Put method saves DataAuditResult in contract storage. Can be invoked only by
// Inner Ring nodes. Does not require multi signature invocations.
//
// Epoch is an epoch number when DataAuditResult structure was generated.
// PeerID contains public keys of Inner Ring node that produced DataAuditResult.
// Value contains stable marshaled structure of DataAuditResult.
func Put(epoch int, peerID []byte, value []byte) {
ctx := storage.GetContext()
notaryDisabled := storage.Get(ctx, notaryDisabledKey).(bool)
var ( // for invocation collection without notary
alphabet []interop.PublicKey
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)
if notaryDisabled {
threshold := len(alphabet)*2/3 + 1
n := common.Vote(ctx, id, nodeKey)
if n < threshold {
return
}
common.RemoveVotes(ctx, id)
}
key := getReputationKey(reputationCountPrefix, id)
rawCnt := storage.Get(ctx, key)
cnt := 0
if rawCnt != nil {
cnt = rawCnt.(int)
}
cnt++
storage.Put(ctx, key, cnt)
key[0] = reputationValuePrefix
key = append(key, convert.ToBytes(cnt)...)
storage.Put(ctx, key, value)
}
// Get method returns list of all stable marshaled DataAuditResult structures
// produced by specified Inner Ring node in specified epoch.
func Get(epoch int, peerID []byte) [][]byte {
id := storageID(epoch, peerID)
return GetByID(id)
}
// GetByID method returns list of all stable marshaled DataAuditResult with
// specified id. Use ListByEpoch method to obtain id.
func GetByID(id []byte) [][]byte {
ctx := storage.GetReadOnlyContext()
var data [][]byte
it := storage.Find(ctx, getReputationKey(reputationValuePrefix, id), storage.ValuesOnly)
for iterator.Next(it) {
data = append(data, iterator.Value(it).([]byte))
}
return data
}
func getReputationKey(prefix byte, id []byte) []byte {
return append([]byte{prefix}, id...)
}
// ListByEpoch returns list of IDs that may be used to get reputation data
// with GetByID method.
func ListByEpoch(epoch int) [][]byte {
ctx := storage.GetReadOnlyContext()
key := getReputationKey(reputationCountPrefix, convert.ToBytes(epoch))
it := storage.Find(ctx, key, storage.KeysOnly)
var result [][]byte
for iterator.Next(it) {
key := iterator.Value(it).([]byte) // iterator MUST BE `storage.KeysOnly`
result = append(result, key[1:])
}
return result
}
// Version returns version of the contract.
func Version() int {
return common.Version
}
func storageID(epoch int, peerID []byte) []byte {
var buf interface{} = epoch
return append(buf.([]byte), peerID...)
}