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