mirror of
https://github.com/nspcc-dev/neo-go.git
synced 2024-12-23 13:41:37 +00:00
111 lines
2.7 KiB
Go
111 lines
2.7 KiB
Go
package stateroot
|
|
|
|
import (
|
|
"sync"
|
|
|
|
"github.com/nspcc-dev/neo-go/pkg/config/netmode"
|
|
"github.com/nspcc-dev/neo-go/pkg/core/state"
|
|
"github.com/nspcc-dev/neo-go/pkg/core/transaction"
|
|
"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
|
|
"github.com/nspcc-dev/neo-go/pkg/io"
|
|
"github.com/nspcc-dev/neo-go/pkg/network/payload"
|
|
"github.com/nspcc-dev/neo-go/pkg/smartcontract"
|
|
"github.com/nspcc-dev/neo-go/pkg/vm/emit"
|
|
)
|
|
|
|
type (
|
|
incompleteRoot struct {
|
|
sync.RWMutex
|
|
// svList is a list of state validator keys for this stateroot.
|
|
svList keys.PublicKeys
|
|
// isSent is true if the state root was already broadcasted.
|
|
isSent bool
|
|
// request is an oracle request.
|
|
root *state.MPTRoot
|
|
// sigs contains a signature from every oracle node.
|
|
sigs map[string]*rootSig
|
|
// myIndex is the index of validator for this root.
|
|
myIndex int
|
|
// myVote is an extensible message containing node's vote.
|
|
myVote *payload.Extensible
|
|
// retries is a counter of send attempts.
|
|
retries int
|
|
}
|
|
|
|
rootSig struct {
|
|
// pub is a cached public key.
|
|
pub *keys.PublicKey
|
|
// ok is true if the signature was verified.
|
|
ok bool
|
|
// sig is a state root signature.
|
|
sig []byte
|
|
}
|
|
)
|
|
|
|
func (r *incompleteRoot) reverify(net netmode.Magic) {
|
|
for _, sig := range r.sigs {
|
|
if !sig.ok {
|
|
sig.ok = sig.pub.VerifyHashable(sig.sig, uint32(net), r.root)
|
|
}
|
|
}
|
|
}
|
|
|
|
func (r *incompleteRoot) addSignature(pub *keys.PublicKey, sig []byte) {
|
|
r.sigs[string(pub.Bytes())] = &rootSig{
|
|
pub: pub,
|
|
ok: r.root != nil,
|
|
sig: sig,
|
|
}
|
|
}
|
|
|
|
func (r *incompleteRoot) isSenderNow() bool {
|
|
if r.root == nil || r.isSent || len(r.svList) == 0 {
|
|
return false
|
|
}
|
|
retries := r.retries
|
|
if retries < 0 {
|
|
retries = 0
|
|
}
|
|
ind := (int(r.root.Index) - retries) % len(r.svList)
|
|
if ind < 0 {
|
|
ind += len(r.svList)
|
|
}
|
|
return ind == r.myIndex
|
|
}
|
|
|
|
// finalize checks if either main or backup tx has sufficient number of signatures and returns
|
|
// tx and bool value indicating if it is ready to be broadcasted.
|
|
func (r *incompleteRoot) finalize() (*state.MPTRoot, bool) {
|
|
if r.root == nil {
|
|
return nil, false
|
|
}
|
|
|
|
m := smartcontract.GetDefaultHonestNodeCount(len(r.svList))
|
|
sigs := make([][]byte, 0, m)
|
|
for _, pub := range r.svList {
|
|
sig, ok := r.sigs[string(pub.Bytes())]
|
|
if ok && sig.ok {
|
|
sigs = append(sigs, sig.sig)
|
|
if len(sigs) == m {
|
|
break
|
|
}
|
|
}
|
|
}
|
|
if len(sigs) != m {
|
|
return nil, false
|
|
}
|
|
|
|
verif, err := smartcontract.CreateDefaultMultiSigRedeemScript(r.svList)
|
|
if err != nil {
|
|
return nil, false
|
|
}
|
|
w := io.NewBufBinWriter()
|
|
for i := range sigs {
|
|
emit.Bytes(w.BinWriter, sigs[i])
|
|
}
|
|
r.root.Witness = []transaction.Witness{{
|
|
InvocationScript: w.Bytes(),
|
|
VerificationScript: verif,
|
|
}}
|
|
return r.root, true
|
|
}
|