forked from TrueCloudLab/neoneo-go
112 lines
2.8 KiB
Go
112 lines
2.8 KiB
Go
package stateroot
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import (
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"errors"
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"fmt"
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"github.com/nspcc-dev/neo-go/pkg/config"
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"github.com/nspcc-dev/neo-go/pkg/core/state"
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"github.com/nspcc-dev/neo-go/pkg/core/transaction"
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"github.com/nspcc-dev/neo-go/pkg/io"
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"github.com/nspcc-dev/neo-go/pkg/network/payload"
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"github.com/nspcc-dev/neo-go/pkg/vm/emit"
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"github.com/nspcc-dev/neo-go/pkg/wallet"
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"go.uber.org/zap"
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)
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const rootValidEndInc = 100
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// RelayCallback represents callback for sending validated state roots.
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type RelayCallback = func(*payload.Extensible)
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// AddSignature adds a state root signature.
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func (s *service) AddSignature(height uint32, validatorIndex int32, sig []byte) error {
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if !s.MainCfg.Enabled {
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return nil
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}
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myIndex, acc := s.getAccount()
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if acc == nil {
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return nil
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}
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incRoot := s.getIncompleteRoot(height, myIndex)
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if incRoot == nil {
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return nil
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}
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incRoot.Lock()
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defer incRoot.Unlock()
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if validatorIndex < 0 || int(validatorIndex) >= len(incRoot.svList) {
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return errors.New("invalid validator index")
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}
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pub := incRoot.svList[validatorIndex]
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if incRoot.root != nil {
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ok := pub.VerifyHashable(sig, uint32(s.Network), incRoot.root)
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if !ok {
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return fmt.Errorf("invalid state root signature for %d", validatorIndex)
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}
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}
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incRoot.addSignature(pub, sig)
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s.trySendRoot(incRoot, acc)
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return nil
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}
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// GetConfig returns service configuration.
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func (s *service) GetConfig() config.StateRoot {
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return s.MainCfg
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}
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func (s *service) getIncompleteRoot(height uint32, myIndex byte) *incompleteRoot {
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s.srMtx.Lock()
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defer s.srMtx.Unlock()
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if incRoot, ok := s.incompleteRoots[height]; ok {
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return incRoot
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}
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incRoot := &incompleteRoot{
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myIndex: int(myIndex),
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svList: s.GetStateValidators(height),
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sigs: make(map[string]*rootSig),
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}
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s.incompleteRoots[height] = incRoot
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return incRoot
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}
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// trySendRoot attempts to finalize and send MPTRoot, it must be called with the ir locked.
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func (s *service) trySendRoot(ir *incompleteRoot, acc *wallet.Account) {
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if !ir.isSenderNow() {
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return
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}
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sr, ready := ir.finalize()
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if ready {
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err := s.AddStateRoot(sr)
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if err != nil {
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s.log.Error("can't add validated state root", zap.Error(err))
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}
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s.sendValidatedRoot(sr, acc)
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ir.isSent = true
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}
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}
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func (s *service) sendValidatedRoot(r *state.MPTRoot, acc *wallet.Account) {
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priv := acc.PrivateKey()
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w := io.NewBufBinWriter()
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m := NewMessage(RootT, r)
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m.EncodeBinary(w.BinWriter)
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ep := &payload.Extensible{
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Category: Category,
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ValidBlockStart: r.Index,
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ValidBlockEnd: r.Index + rootValidEndInc,
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Sender: priv.GetScriptHash(),
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Data: w.Bytes(),
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Witness: transaction.Witness{
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VerificationScript: acc.GetVerificationScript(),
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},
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}
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sig := priv.SignHashable(uint32(s.Network), ep)
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buf := io.NewBufBinWriter()
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emit.Bytes(buf.BinWriter, sig)
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ep.Witness.InvocationScript = buf.Bytes()
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s.relayExtensible(ep)
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}
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