You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
353 lines
10 KiB
353 lines
10 KiB
package state
|
|
|
|
import (
|
|
"bytes"
|
|
"io"
|
|
"time"
|
|
|
|
"github.com/tendermint/tendermint/account"
|
|
"github.com/tendermint/tendermint/binary"
|
|
. "github.com/tendermint/tendermint/common"
|
|
dbm "github.com/tendermint/tendermint/db"
|
|
"github.com/tendermint/tendermint/events"
|
|
"github.com/tendermint/tendermint/merkle"
|
|
"github.com/tendermint/tendermint/types"
|
|
)
|
|
|
|
var (
|
|
stateKey = []byte("stateKey")
|
|
minBondAmount = int64(1) // TODO adjust
|
|
defaultAccountsCacheCapacity = 1000 // TODO adjust
|
|
unbondingPeriodBlocks = int(60 * 24 * 365) // TODO probably better to make it time based.
|
|
validatorTimeoutBlocks = int(10) // TODO adjust
|
|
)
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
// NOTE: not goroutine-safe.
|
|
type State struct {
|
|
DB dbm.DB
|
|
ChainID string
|
|
LastBlockHeight int
|
|
LastBlockHash []byte
|
|
LastBlockParts types.PartSetHeader
|
|
LastBlockTime time.Time
|
|
BondedValidators *ValidatorSet
|
|
LastBondedValidators *ValidatorSet
|
|
UnbondingValidators *ValidatorSet
|
|
accounts merkle.Tree // Shouldn't be accessed directly.
|
|
validatorInfos merkle.Tree // Shouldn't be accessed directly.
|
|
nameReg merkle.Tree // Shouldn't be accessed directly.
|
|
|
|
evc events.Fireable // typically an events.EventCache
|
|
}
|
|
|
|
func LoadState(db dbm.DB) *State {
|
|
s := &State{DB: db}
|
|
buf := db.Get(stateKey)
|
|
if len(buf) == 0 {
|
|
return nil
|
|
} else {
|
|
r, n, err := bytes.NewReader(buf), new(int64), new(error)
|
|
s.ChainID = binary.ReadString(r, n, err)
|
|
s.LastBlockHeight = binary.ReadVarint(r, n, err)
|
|
s.LastBlockHash = binary.ReadByteSlice(r, n, err)
|
|
s.LastBlockParts = binary.ReadBinary(types.PartSetHeader{}, r, n, err).(types.PartSetHeader)
|
|
s.LastBlockTime = binary.ReadTime(r, n, err)
|
|
s.BondedValidators = binary.ReadBinary(&ValidatorSet{}, r, n, err).(*ValidatorSet)
|
|
s.LastBondedValidators = binary.ReadBinary(&ValidatorSet{}, r, n, err).(*ValidatorSet)
|
|
s.UnbondingValidators = binary.ReadBinary(&ValidatorSet{}, r, n, err).(*ValidatorSet)
|
|
accountsHash := binary.ReadByteSlice(r, n, err)
|
|
s.accounts = merkle.NewIAVLTree(binary.BasicCodec, account.AccountCodec, defaultAccountsCacheCapacity, db)
|
|
s.accounts.Load(accountsHash)
|
|
validatorInfosHash := binary.ReadByteSlice(r, n, err)
|
|
s.validatorInfos = merkle.NewIAVLTree(binary.BasicCodec, ValidatorInfoCodec, 0, db)
|
|
s.validatorInfos.Load(validatorInfosHash)
|
|
nameRegHash := binary.ReadByteSlice(r, n, err)
|
|
s.nameReg = merkle.NewIAVLTree(binary.BasicCodec, NameRegCodec, 0, db)
|
|
s.nameReg.Load(nameRegHash)
|
|
if *err != nil {
|
|
// DATA HAS BEEN CORRUPTED OR THE SPEC HAS CHANGED
|
|
Exit(Fmt("Data has been corrupted or its spec has changed: %v\n", *err))
|
|
}
|
|
// TODO: ensure that buf is completely read.
|
|
}
|
|
return s
|
|
}
|
|
|
|
func (s *State) Save() {
|
|
s.accounts.Save()
|
|
s.validatorInfos.Save()
|
|
s.nameReg.Save()
|
|
buf, n, err := new(bytes.Buffer), new(int64), new(error)
|
|
binary.WriteString(s.ChainID, buf, n, err)
|
|
binary.WriteVarint(s.LastBlockHeight, buf, n, err)
|
|
binary.WriteByteSlice(s.LastBlockHash, buf, n, err)
|
|
binary.WriteBinary(s.LastBlockParts, buf, n, err)
|
|
binary.WriteTime(s.LastBlockTime, buf, n, err)
|
|
binary.WriteBinary(s.BondedValidators, buf, n, err)
|
|
binary.WriteBinary(s.LastBondedValidators, buf, n, err)
|
|
binary.WriteBinary(s.UnbondingValidators, buf, n, err)
|
|
binary.WriteByteSlice(s.accounts.Hash(), buf, n, err)
|
|
binary.WriteByteSlice(s.validatorInfos.Hash(), buf, n, err)
|
|
binary.WriteByteSlice(s.nameReg.Hash(), buf, n, err)
|
|
if *err != nil {
|
|
// SOMETHING HAS GONE HORRIBLY WRONG
|
|
panic(*err)
|
|
}
|
|
s.DB.Set(stateKey, buf.Bytes())
|
|
}
|
|
|
|
// CONTRACT:
|
|
// Copy() is a cheap way to take a snapshot,
|
|
// as if State were copied by value.
|
|
func (s *State) Copy() *State {
|
|
return &State{
|
|
DB: s.DB,
|
|
ChainID: s.ChainID,
|
|
LastBlockHeight: s.LastBlockHeight,
|
|
LastBlockHash: s.LastBlockHash,
|
|
LastBlockParts: s.LastBlockParts,
|
|
LastBlockTime: s.LastBlockTime,
|
|
BondedValidators: s.BondedValidators.Copy(), // TODO remove need for Copy() here.
|
|
LastBondedValidators: s.LastBondedValidators.Copy(), // That is, make updates to the validator set
|
|
UnbondingValidators: s.UnbondingValidators.Copy(), // copy the valSet lazily.
|
|
accounts: s.accounts.Copy(),
|
|
validatorInfos: s.validatorInfos.Copy(),
|
|
nameReg: s.nameReg.Copy(),
|
|
evc: nil,
|
|
}
|
|
}
|
|
|
|
// Returns a hash that represents the state data, excluding Last*
|
|
func (s *State) Hash() []byte {
|
|
hashables := []merkle.Hashable{
|
|
s.BondedValidators,
|
|
s.UnbondingValidators,
|
|
s.accounts,
|
|
s.validatorInfos,
|
|
s.nameReg,
|
|
}
|
|
return merkle.SimpleHashFromHashables(hashables)
|
|
}
|
|
|
|
// Mutates the block in place and updates it with new state hash.
|
|
func (s *State) ComputeBlockStateHash(block *types.Block) error {
|
|
sCopy := s.Copy()
|
|
// sCopy has no event cache in it, so this won't fire events
|
|
err := execBlock(sCopy, block, types.PartSetHeader{})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
// Set block.StateHash
|
|
block.StateHash = sCopy.Hash()
|
|
return nil
|
|
}
|
|
|
|
//-------------------------------------
|
|
// State.accounts
|
|
|
|
// Returns nil if account does not exist with given address.
|
|
// The returned Account is a copy, so mutating it
|
|
// has no side effects.
|
|
// Implements Statelike
|
|
func (s *State) GetAccount(address []byte) *account.Account {
|
|
_, acc := s.accounts.Get(address)
|
|
if acc == nil {
|
|
return nil
|
|
}
|
|
return acc.(*account.Account).Copy()
|
|
}
|
|
|
|
// The account is copied before setting, so mutating it
|
|
// afterwards has no side effects.
|
|
// Implements Statelike
|
|
func (s *State) UpdateAccount(account *account.Account) bool {
|
|
return s.accounts.Set(account.Address, account.Copy())
|
|
}
|
|
|
|
// Implements Statelike
|
|
func (s *State) RemoveAccount(address []byte) bool {
|
|
_, removed := s.accounts.Remove(address)
|
|
return removed
|
|
}
|
|
|
|
// The returned Account is a copy, so mutating it
|
|
// has no side effects.
|
|
func (s *State) GetAccounts() merkle.Tree {
|
|
return s.accounts.Copy()
|
|
}
|
|
|
|
// State.accounts
|
|
//-------------------------------------
|
|
// State.validators
|
|
|
|
// The returned ValidatorInfo is a copy, so mutating it
|
|
// has no side effects.
|
|
func (s *State) GetValidatorInfo(address []byte) *ValidatorInfo {
|
|
_, valInfo := s.validatorInfos.Get(address)
|
|
if valInfo == nil {
|
|
return nil
|
|
}
|
|
return valInfo.(*ValidatorInfo).Copy()
|
|
}
|
|
|
|
// Returns false if new, true if updated.
|
|
// The valInfo is copied before setting, so mutating it
|
|
// afterwards has no side effects.
|
|
func (s *State) SetValidatorInfo(valInfo *ValidatorInfo) (updated bool) {
|
|
return s.validatorInfos.Set(valInfo.Address, valInfo.Copy())
|
|
}
|
|
|
|
func (s *State) unbondValidator(val *Validator) {
|
|
// Move validator to UnbondingValidators
|
|
val, removed := s.BondedValidators.Remove(val.Address)
|
|
if !removed {
|
|
// SOMETHING HAS GONE HORRIBLY WRONG
|
|
panic("Couldn't remove validator for unbonding")
|
|
}
|
|
val.UnbondHeight = s.LastBlockHeight + 1
|
|
added := s.UnbondingValidators.Add(val)
|
|
if !added {
|
|
// SOMETHING HAS GONE HORRIBLY WRONG
|
|
panic("Couldn't add validator for unbonding")
|
|
}
|
|
}
|
|
|
|
func (s *State) rebondValidator(val *Validator) {
|
|
// Move validator to BondingValidators
|
|
val, removed := s.UnbondingValidators.Remove(val.Address)
|
|
if !removed {
|
|
// SOMETHING HAS GONE HORRIBLY WRONG
|
|
panic("Couldn't remove validator for rebonding")
|
|
}
|
|
val.BondHeight = s.LastBlockHeight + 1
|
|
added := s.BondedValidators.Add(val)
|
|
if !added {
|
|
// SOMETHING HAS GONE HORRIBLY WRONG
|
|
panic("Couldn't add validator for rebonding")
|
|
}
|
|
}
|
|
|
|
func (s *State) releaseValidator(val *Validator) {
|
|
// Update validatorInfo
|
|
valInfo := s.GetValidatorInfo(val.Address)
|
|
// SANITY CHECK
|
|
if valInfo == nil {
|
|
panic("Couldn't find validatorInfo for release")
|
|
}
|
|
// SANITY CHECK END
|
|
valInfo.ReleasedHeight = s.LastBlockHeight + 1
|
|
s.SetValidatorInfo(valInfo)
|
|
|
|
// Send coins back to UnbondTo outputs
|
|
accounts, err := getOrMakeAccounts(s, nil, valInfo.UnbondTo)
|
|
// SANITY CHECK
|
|
if err != nil {
|
|
panic("Couldn't get or make unbondTo accounts")
|
|
}
|
|
// SANITY CHECK END
|
|
adjustByOutputs(accounts, valInfo.UnbondTo)
|
|
for _, acc := range accounts {
|
|
s.UpdateAccount(acc)
|
|
}
|
|
|
|
// Remove validator from UnbondingValidators
|
|
_, removed := s.UnbondingValidators.Remove(val.Address)
|
|
if !removed {
|
|
// SOMETHING HAS GONE HORRIBLY WRONG
|
|
panic("Couldn't remove validator for release")
|
|
}
|
|
}
|
|
|
|
func (s *State) destroyValidator(val *Validator) {
|
|
// Update validatorInfo
|
|
valInfo := s.GetValidatorInfo(val.Address)
|
|
// SANITY CHECK
|
|
if valInfo == nil {
|
|
panic("Couldn't find validatorInfo for release")
|
|
}
|
|
// SANITY CHECK END
|
|
valInfo.DestroyedHeight = s.LastBlockHeight + 1
|
|
valInfo.DestroyedAmount = val.VotingPower
|
|
s.SetValidatorInfo(valInfo)
|
|
|
|
// Remove validator
|
|
_, removed := s.BondedValidators.Remove(val.Address)
|
|
if !removed {
|
|
_, removed := s.UnbondingValidators.Remove(val.Address)
|
|
if !removed {
|
|
// SOMETHING HAS GONE HORRIBLY WRONG
|
|
panic("Couldn't remove validator for destruction")
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
// State.validators
|
|
//-------------------------------------
|
|
// State.storage
|
|
|
|
func (s *State) LoadStorage(hash []byte) (storage merkle.Tree) {
|
|
storage = merkle.NewIAVLTree(binary.BasicCodec, binary.BasicCodec, 1024, s.DB)
|
|
storage.Load(hash)
|
|
return storage
|
|
}
|
|
|
|
// State.storage
|
|
//-------------------------------------
|
|
// State.nameReg
|
|
|
|
func (s *State) GetNameRegEntry(name string) *types.NameRegEntry {
|
|
_, value := s.nameReg.Get(name)
|
|
if value == nil {
|
|
return nil
|
|
}
|
|
entry := value.(*types.NameRegEntry)
|
|
return entry.Copy()
|
|
}
|
|
|
|
func (s *State) UpdateNameRegEntry(entry *types.NameRegEntry) bool {
|
|
return s.nameReg.Set(entry.Name, entry)
|
|
}
|
|
|
|
func (s *State) RemoveNameRegEntry(name string) bool {
|
|
_, removed := s.nameReg.Remove(name)
|
|
return removed
|
|
}
|
|
|
|
func (s *State) GetNames() merkle.Tree {
|
|
return s.nameReg.Copy()
|
|
}
|
|
|
|
func NameRegEncoder(o interface{}, w io.Writer, n *int64, err *error) {
|
|
binary.WriteBinary(o.(*types.NameRegEntry), w, n, err)
|
|
}
|
|
|
|
func NameRegDecoder(r io.Reader, n *int64, err *error) interface{} {
|
|
return binary.ReadBinary(&types.NameRegEntry{}, r, n, err)
|
|
}
|
|
|
|
var NameRegCodec = binary.Codec{
|
|
Encode: NameRegEncoder,
|
|
Decode: NameRegDecoder,
|
|
}
|
|
|
|
// State.nameReg
|
|
//-------------------------------------
|
|
|
|
// Implements events.Eventable. Typically uses events.EventCache
|
|
func (s *State) SetFireable(evc events.Fireable) {
|
|
s.evc = evc
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
|
|
type InvalidTxError struct {
|
|
Tx types.Tx
|
|
Reason error
|
|
}
|
|
|
|
func (txErr InvalidTxError) Error() string {
|
|
return Fmt("Invalid tx: [%v] reason: [%v]", txErr.Tx, txErr.Reason)
|
|
}
|