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65 lines
2.8 KiB
Go
65 lines
2.8 KiB
Go
package engine_v2
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import (
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"errors"
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"math/big"
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"github.com/XinFinOrg/XDPoSChain/common"
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"github.com/XinFinOrg/XDPoSChain/consensus"
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"github.com/XinFinOrg/XDPoSChain/consensus/XDPoS/utils"
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"github.com/XinFinOrg/XDPoSChain/core/types"
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"github.com/XinFinOrg/XDPoSChain/log"
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)
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// Using parent and current round to find the finalised master node list(with penalties applied from last epoch)
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func (x *XDPoS_v2) checkYourturnWithinFinalisedMasternodes(chain consensus.ChainReader, round utils.Round, parent *types.Header, signer common.Address) (bool, error) {
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isEpochSwitch, _, err := x.isEpochSwitchAtRound(round, parent)
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if err != nil {
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log.Error("[checkYourturnWithinFinalisedMasternodes] check epoch switch at round failed", "Error", err)
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return false, err
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}
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var masterNodes []common.Address
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if isEpochSwitch {
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if x.config.V2.SwitchBlock.Cmp(parent.Number) == 0 {
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// the initial master nodes of v1->v2 switch contains penalties node
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_, _, masterNodes, err = x.getExtraFields(parent)
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if err != nil {
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log.Error("[checkYourturnWithinFinalisedMasternodes] Cannot find snapshot at gap num of last V1", "err", err, "number", x.config.V2.SwitchBlock.Uint64())
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return false, err
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}
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} else {
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masterNodes, _, err = x.calcMasternodes(chain, big.NewInt(0).Add(parent.Number, big.NewInt(1)), parent.Hash())
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if err != nil {
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log.Error("[checkYourturnWithinFinalisedMasternodes] Cannot calcMasternodes at gap num ", "err", err, "parent number", parent.Number)
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return false, err
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}
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}
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} else {
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// this block and parent belong to the same epoch
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masterNodes = x.GetMasternodes(chain, parent)
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}
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if len(masterNodes) == 0 {
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log.Error("[checkYourturnWithinFinalisedMasternodes] Fail to find any master nodes from current block round epoch", "Hash", parent.Hash(), "CurrentRound", round, "Number", parent.Number)
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return false, errors.New("masternodes not found")
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}
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curIndex := utils.Position(masterNodes, signer)
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if curIndex == -1 {
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log.Debug("[checkYourturnWithinFinalisedMasternodes] Not authorised signer", "MN", masterNodes, "Hash", parent.Hash(), "signer", signer)
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return false, nil
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}
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for i, s := range masterNodes {
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log.Debug("[checkYourturnWithinFinalisedMasternodes] Masternode:", "index", i, "address", s.String(), "parentBlockNum", parent.Number)
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}
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leaderIndex := uint64(round) % x.config.Epoch % uint64(len(masterNodes))
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if masterNodes[leaderIndex] != signer {
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log.Debug("[checkYourturnWithinFinalisedMasternodes] Not my turn", "curIndex", curIndex, "leaderIndex", leaderIndex, "Hash", parent.Hash().Hex(), "masterNodes[leaderIndex]", masterNodes[leaderIndex], "signer", signer)
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return false, nil
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}
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log.Debug("[checkYourturnWithinFinalisedMasternodes] Yes, it's my turn based on parent block", "ParentHash", parent.Hash().Hex(), "ParentBlockNumber", parent.Number.Uint64())
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return true, nil
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}
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