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476 lines
14 KiB
476 lines
14 KiB
package state
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import (
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"bytes"
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"io"
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"io/ioutil"
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"time"
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acm "github.com/tendermint/tendermint/account"
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. "github.com/tendermint/tendermint/common"
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dbm "github.com/tendermint/tendermint/db"
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"github.com/tendermint/tendermint/events"
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"github.com/tendermint/tendermint/merkle"
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ptypes "github.com/tendermint/tendermint/permission/types"
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. "github.com/tendermint/tendermint/state/types"
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"github.com/tendermint/tendermint/types"
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"github.com/tendermint/tendermint/wire"
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)
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var (
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stateKey = []byte("stateKey")
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minBondAmount = int64(1) // TODO adjust
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defaultAccountsCacheCapacity = 1000 // TODO adjust
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unbondingPeriodBlocks = int(60 * 24 * 365) // TODO probably better to make it time based.
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validatorTimeoutBlocks = int(10) // TODO adjust
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)
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//-----------------------------------------------------------------------------
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// NOTE: not goroutine-safe.
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type State struct {
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DB dbm.DB
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ChainID string
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LastBlockHeight int
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LastBlockHash []byte
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LastBlockParts types.PartSetHeader
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LastBlockTime time.Time
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BondedValidators *types.ValidatorSet
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LastBondedValidators *types.ValidatorSet
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UnbondingValidators *types.ValidatorSet
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accounts merkle.Tree // Shouldn't be accessed directly.
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validatorInfos merkle.Tree // Shouldn't be accessed directly.
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nameReg merkle.Tree // Shouldn't be accessed directly.
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evc events.Fireable // typically an events.EventCache
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}
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func LoadState(db dbm.DB) *State {
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s := &State{DB: db}
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buf := db.Get(stateKey)
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if len(buf) == 0 {
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return nil
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} else {
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r, n, err := bytes.NewReader(buf), new(int64), new(error)
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s.ChainID = wire.ReadString(r, n, err)
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s.LastBlockHeight = wire.ReadVarint(r, n, err)
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s.LastBlockHash = wire.ReadByteSlice(r, n, err)
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s.LastBlockParts = wire.ReadBinary(types.PartSetHeader{}, r, n, err).(types.PartSetHeader)
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s.LastBlockTime = wire.ReadTime(r, n, err)
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s.BondedValidators = wire.ReadBinary(&types.ValidatorSet{}, r, n, err).(*types.ValidatorSet)
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s.LastBondedValidators = wire.ReadBinary(&types.ValidatorSet{}, r, n, err).(*types.ValidatorSet)
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s.UnbondingValidators = wire.ReadBinary(&types.ValidatorSet{}, r, n, err).(*types.ValidatorSet)
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accountsHash := wire.ReadByteSlice(r, n, err)
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s.accounts = merkle.NewIAVLTree(wire.BasicCodec, acm.AccountCodec, defaultAccountsCacheCapacity, db)
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s.accounts.Load(accountsHash)
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validatorInfosHash := wire.ReadByteSlice(r, n, err)
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s.validatorInfos = merkle.NewIAVLTree(wire.BasicCodec, types.ValidatorInfoCodec, 0, db)
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s.validatorInfos.Load(validatorInfosHash)
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nameRegHash := wire.ReadByteSlice(r, n, err)
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s.nameReg = merkle.NewIAVLTree(wire.BasicCodec, NameRegCodec, 0, db)
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s.nameReg.Load(nameRegHash)
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if *err != nil {
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// DATA HAS BEEN CORRUPTED OR THE SPEC HAS CHANGED
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Exit(Fmt("Data has been corrupted or its spec has changed: %v\n", *err))
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}
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// TODO: ensure that buf is completely read.
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}
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return s
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}
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func (s *State) Save() {
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s.accounts.Save()
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s.validatorInfos.Save()
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s.nameReg.Save()
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buf, n, err := new(bytes.Buffer), new(int64), new(error)
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wire.WriteString(s.ChainID, buf, n, err)
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wire.WriteVarint(s.LastBlockHeight, buf, n, err)
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wire.WriteByteSlice(s.LastBlockHash, buf, n, err)
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wire.WriteBinary(s.LastBlockParts, buf, n, err)
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wire.WriteTime(s.LastBlockTime, buf, n, err)
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wire.WriteBinary(s.BondedValidators, buf, n, err)
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wire.WriteBinary(s.LastBondedValidators, buf, n, err)
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wire.WriteBinary(s.UnbondingValidators, buf, n, err)
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wire.WriteByteSlice(s.accounts.Hash(), buf, n, err)
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wire.WriteByteSlice(s.validatorInfos.Hash(), buf, n, err)
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wire.WriteByteSlice(s.nameReg.Hash(), buf, n, err)
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if *err != nil {
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PanicCrisis(*err)
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}
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s.DB.Set(stateKey, buf.Bytes())
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}
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// CONTRACT:
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// Copy() is a cheap way to take a snapshot,
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// as if State were copied by value.
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func (s *State) Copy() *State {
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return &State{
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DB: s.DB,
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ChainID: s.ChainID,
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LastBlockHeight: s.LastBlockHeight,
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LastBlockHash: s.LastBlockHash,
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LastBlockParts: s.LastBlockParts,
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LastBlockTime: s.LastBlockTime,
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BondedValidators: s.BondedValidators.Copy(), // TODO remove need for Copy() here.
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LastBondedValidators: s.LastBondedValidators.Copy(), // That is, make updates to the validator set
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UnbondingValidators: s.UnbondingValidators.Copy(), // copy the valSet lazily.
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accounts: s.accounts.Copy(),
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validatorInfos: s.validatorInfos.Copy(),
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nameReg: s.nameReg.Copy(),
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evc: nil,
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}
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}
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// Returns a hash that represents the state data, excluding Last*
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func (s *State) Hash() []byte {
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hashables := []merkle.Hashable{
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s.BondedValidators,
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s.UnbondingValidators,
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s.accounts,
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s.validatorInfos,
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s.nameReg,
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}
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return merkle.SimpleHashFromHashables(hashables)
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}
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// Mutates the block in place and updates it with new state hash.
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func (s *State) ComputeBlockStateHash(block *types.Block) error {
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sCopy := s.Copy()
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// sCopy has no event cache in it, so this won't fire events
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err := execBlock(sCopy, block, types.PartSetHeader{})
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if err != nil {
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return err
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}
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// Set block.StateHash
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block.StateHash = sCopy.Hash()
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return nil
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}
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func (s *State) SetDB(db dbm.DB) {
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s.DB = db
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}
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//-------------------------------------
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// State.params
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func (s *State) GetGasLimit() int64 {
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return 1000000 // TODO
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}
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// State.params
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//-------------------------------------
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// State.accounts
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// Returns nil if account does not exist with given address.
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// The returned Account is a copy, so mutating it
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// has no side effects.
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// Implements Statelike
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func (s *State) GetAccount(address []byte) *acm.Account {
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_, acc := s.accounts.Get(address)
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if acc == nil {
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return nil
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}
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return acc.(*acm.Account).Copy()
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}
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// The account is copied before setting, so mutating it
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// afterwards has no side effects.
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// Implements Statelike
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func (s *State) UpdateAccount(account *acm.Account) bool {
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return s.accounts.Set(account.Address, account.Copy())
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}
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// Implements Statelike
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func (s *State) RemoveAccount(address []byte) bool {
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_, removed := s.accounts.Remove(address)
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return removed
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}
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// The returned Account is a copy, so mutating it
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// has no side effects.
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func (s *State) GetAccounts() merkle.Tree {
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return s.accounts.Copy()
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}
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// Set the accounts tree
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func (s *State) SetAccounts(accounts merkle.Tree) {
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s.accounts = accounts
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}
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// State.accounts
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//-------------------------------------
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// State.validators
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// The returned ValidatorInfo is a copy, so mutating it
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// has no side effects.
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func (s *State) GetValidatorInfo(address []byte) *types.ValidatorInfo {
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_, valInfo := s.validatorInfos.Get(address)
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if valInfo == nil {
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return nil
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}
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return valInfo.(*types.ValidatorInfo).Copy()
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}
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// Returns false if new, true if updated.
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// The valInfo is copied before setting, so mutating it
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// afterwards has no side effects.
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func (s *State) SetValidatorInfo(valInfo *types.ValidatorInfo) (updated bool) {
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return s.validatorInfos.Set(valInfo.Address, valInfo.Copy())
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}
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func (s *State) GetValidatorInfos() merkle.Tree {
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return s.validatorInfos.Copy()
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}
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func (s *State) unbondValidator(val *types.Validator) {
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// Move validator to UnbondingValidators
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val, removed := s.BondedValidators.Remove(val.Address)
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if !removed {
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PanicCrisis("Couldn't remove validator for unbonding")
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}
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val.UnbondHeight = s.LastBlockHeight + 1
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added := s.UnbondingValidators.Add(val)
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if !added {
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PanicCrisis("Couldn't add validator for unbonding")
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}
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}
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func (s *State) rebondValidator(val *types.Validator) {
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// Move validator to BondingValidators
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val, removed := s.UnbondingValidators.Remove(val.Address)
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if !removed {
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PanicCrisis("Couldn't remove validator for rebonding")
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}
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val.BondHeight = s.LastBlockHeight + 1
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added := s.BondedValidators.Add(val)
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if !added {
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PanicCrisis("Couldn't add validator for rebonding")
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}
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}
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func (s *State) releaseValidator(val *types.Validator) {
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// Update validatorInfo
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valInfo := s.GetValidatorInfo(val.Address)
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if valInfo == nil {
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PanicSanity("Couldn't find validatorInfo for release")
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}
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valInfo.ReleasedHeight = s.LastBlockHeight + 1
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s.SetValidatorInfo(valInfo)
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// Send coins back to UnbondTo outputs
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accounts, err := getOrMakeOutputs(s, nil, valInfo.UnbondTo)
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if err != nil {
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PanicSanity("Couldn't get or make unbondTo accounts")
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}
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adjustByOutputs(accounts, valInfo.UnbondTo)
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for _, acc := range accounts {
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s.UpdateAccount(acc)
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}
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// Remove validator from UnbondingValidators
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_, removed := s.UnbondingValidators.Remove(val.Address)
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if !removed {
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PanicCrisis("Couldn't remove validator for release")
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}
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}
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func (s *State) destroyValidator(val *types.Validator) {
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// Update validatorInfo
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valInfo := s.GetValidatorInfo(val.Address)
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if valInfo == nil {
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PanicSanity("Couldn't find validatorInfo for release")
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}
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valInfo.DestroyedHeight = s.LastBlockHeight + 1
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valInfo.DestroyedAmount = val.VotingPower
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s.SetValidatorInfo(valInfo)
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// Remove validator
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_, removed := s.BondedValidators.Remove(val.Address)
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if !removed {
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_, removed := s.UnbondingValidators.Remove(val.Address)
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if !removed {
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PanicCrisis("Couldn't remove validator for destruction")
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}
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}
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}
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// Set the validator infos tree
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func (s *State) SetValidatorInfos(validatorInfos merkle.Tree) {
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s.validatorInfos = validatorInfos
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}
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// State.validators
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//-------------------------------------
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// State.storage
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func (s *State) LoadStorage(hash []byte) (storage merkle.Tree) {
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storage = merkle.NewIAVLTree(wire.BasicCodec, wire.BasicCodec, 1024, s.DB)
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storage.Load(hash)
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return storage
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}
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// State.storage
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//-------------------------------------
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// State.nameReg
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func (s *State) GetNameRegEntry(name string) *types.NameRegEntry {
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_, value := s.nameReg.Get(name)
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if value == nil {
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return nil
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}
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entry := value.(*types.NameRegEntry)
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return entry.Copy()
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}
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func (s *State) UpdateNameRegEntry(entry *types.NameRegEntry) bool {
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return s.nameReg.Set(entry.Name, entry)
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}
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func (s *State) RemoveNameRegEntry(name string) bool {
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_, removed := s.nameReg.Remove(name)
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return removed
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}
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func (s *State) GetNames() merkle.Tree {
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return s.nameReg.Copy()
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}
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// Set the name reg tree
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func (s *State) SetNameReg(nameReg merkle.Tree) {
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s.nameReg = nameReg
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}
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func NameRegEncoder(o interface{}, w io.Writer, n *int64, err *error) {
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wire.WriteBinary(o.(*types.NameRegEntry), w, n, err)
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}
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func NameRegDecoder(r io.Reader, n *int64, err *error) interface{} {
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return wire.ReadBinary(&types.NameRegEntry{}, r, n, err)
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}
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var NameRegCodec = wire.Codec{
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Encode: NameRegEncoder,
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Decode: NameRegDecoder,
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}
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// State.nameReg
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//-------------------------------------
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// Implements events.Eventable. Typically uses events.EventCache
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func (s *State) SetFireable(evc events.Fireable) {
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s.evc = evc
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}
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//-----------------------------------------------------------------------------
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// Genesis
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func MakeGenesisStateFromFile(db dbm.DB, genDocFile string) (*GenesisDoc, *State) {
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jsonBlob, err := ioutil.ReadFile(genDocFile)
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if err != nil {
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Exit(Fmt("Couldn't read GenesisDoc file: %v", err))
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}
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genDoc := GenesisDocFromJSON(jsonBlob)
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return genDoc, MakeGenesisState(db, genDoc)
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}
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func MakeGenesisState(db dbm.DB, genDoc *GenesisDoc) *State {
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if len(genDoc.Validators) == 0 {
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Exit(Fmt("The genesis file has no validators"))
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}
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if genDoc.GenesisTime.IsZero() {
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genDoc.GenesisTime = time.Now()
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}
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// Make accounts state tree
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accounts := merkle.NewIAVLTree(wire.BasicCodec, acm.AccountCodec, defaultAccountsCacheCapacity, db)
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for _, genAcc := range genDoc.Accounts {
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perm := ptypes.ZeroAccountPermissions
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if genAcc.Permissions != nil {
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perm = *genAcc.Permissions
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}
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acc := &acm.Account{
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Address: genAcc.Address,
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PubKey: nil,
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Sequence: 0,
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Balance: genAcc.Amount,
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Permissions: perm,
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}
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accounts.Set(acc.Address, acc)
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}
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// global permissions are saved as the 0 address
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// so they are included in the accounts tree
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globalPerms := ptypes.DefaultAccountPermissions
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if genDoc.Params != nil && genDoc.Params.GlobalPermissions != nil {
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globalPerms = *genDoc.Params.GlobalPermissions
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// XXX: make sure the set bits are all true
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// Without it the HasPermission() functions will fail
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globalPerms.Base.SetBit = ptypes.AllPermFlags
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}
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permsAcc := &acm.Account{
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Address: ptypes.GlobalPermissionsAddress,
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PubKey: nil,
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Sequence: 0,
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Balance: 1337,
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Permissions: globalPerms,
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}
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accounts.Set(permsAcc.Address, permsAcc)
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// Make validatorInfos state tree && validators slice
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validatorInfos := merkle.NewIAVLTree(wire.BasicCodec, types.ValidatorInfoCodec, 0, db)
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validators := make([]*types.Validator, len(genDoc.Validators))
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for i, val := range genDoc.Validators {
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pubKey := val.PubKey
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address := pubKey.Address()
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// Make ValidatorInfo
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valInfo := &types.ValidatorInfo{
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Address: address,
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PubKey: pubKey,
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UnbondTo: make([]*types.TxOutput, len(val.UnbondTo)),
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FirstBondHeight: 0,
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FirstBondAmount: val.Amount,
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}
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for i, unbondTo := range val.UnbondTo {
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valInfo.UnbondTo[i] = &types.TxOutput{
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Address: unbondTo.Address,
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Amount: unbondTo.Amount,
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}
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}
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validatorInfos.Set(address, valInfo)
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// Make validator
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validators[i] = &types.Validator{
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Address: address,
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PubKey: pubKey,
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VotingPower: val.Amount,
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}
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}
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// Make namereg tree
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nameReg := merkle.NewIAVLTree(wire.BasicCodec, NameRegCodec, 0, db)
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// TODO: add names, contracts to genesis.json
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// IAVLTrees must be persisted before copy operations.
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accounts.Save()
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validatorInfos.Save()
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nameReg.Save()
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return &State{
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DB: db,
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ChainID: genDoc.ChainID,
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LastBlockHeight: 0,
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LastBlockHash: nil,
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LastBlockParts: types.PartSetHeader{},
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LastBlockTime: genDoc.GenesisTime,
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BondedValidators: types.NewValidatorSet(validators),
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LastBondedValidators: types.NewValidatorSet(nil),
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UnbondingValidators: types.NewValidatorSet(nil),
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accounts: accounts,
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validatorInfos: validatorInfos,
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nameReg: nameReg,
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}
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}
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