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Revert "core: add voting and result tracking for the dao soft-fork"

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This reverts commit c4de28938f.
This commit is contained in:
Péter Szilágyi 2016-06-29 11:44:40 +03:00
parent 67e9d33486
commit d55fc35df1
5 changed files with 20 additions and 436 deletions
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14
cmd/utils/flags.go
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@ -163,8 +163,8 @@ var (
}
// Miner settings
// TODO: refactor CPU vs GPU mining flags
BlockedCodeHashesFlag = cli.StringFlag{
Name: "blocked-code-hashes",
IllegalCodeHashesFlag = cli.StringFlag{
Name: "illegal-code-hashes",
Usage: "Comma separated list of code-hashes to ignore any interaction from",
}
MiningEnabledFlag = cli.BoolFlag{
@ -644,9 +644,9 @@ func MakePasswordList(ctx *cli.Context) []string {
return lines
}
// MakeBlockedCodeHashes parses a comma separated list of hashes.
func MakeBlockedCodeHashes(ctx *cli.Context) map[common.Hash]struct{} {
splittedHexHashes := strings.Split(ctx.GlobalString(BlockedCodeHashesFlag.Name), ",")
// ParseIllegalCodeHashes parses a comma separated list of hashes.
func ParseIllegalCodeHashes(ctx *cli.Context) map[common.Hash]struct{} {
splittedHexHashes := strings.Split(ctx.GlobalString(IllegalCodeHashesFlag.Name), ",")
illegalCodeHashes := make(map[common.Hash]struct{})
for _, hexHash := range splittedHexHashes {
illegalCodeHashes[common.HexToHash(strings.TrimSpace(hexHash))] = struct{}{}
@ -690,8 +690,8 @@ func MakeSystemNode(name, version string, relconf release.Config, extra []byte,
}
// Configure the Ethereum service
accman := MakeAccountManager(ctx)
// parse the blocked code hashes and set them to the core package.
core.BlockedCodeHashes = MakeBlockedCodeHashes(ctx)
// parse the illegal code hashes and set them to the core package.
core.IllegalCodeHashes = ParseIllegalCodeHashes(ctx)
// initialise new random number generator
rand := rand.New(rand.NewSource(time.Now().UnixNano()))

358
core/dao_test.go
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File diff suppressed because one or more lines are too long

3
core/execution.go
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@ -149,9 +149,6 @@ func execDelegateCall(env vm.Environment, caller vm.ContractRef, originAddr, toA
return nil, common.Address{}, vm.DepthError
}
if value.Cmp(common.Big0) > 0 {
env.MarkCodeHash(env.Db().GetCodeHash(caller.Address()))
}
snapshot := env.MakeSnapshot()
var to vm.Account

73
core/state_processor.go
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@ -32,20 +32,13 @@ import (
var (
big8 = big.NewInt(8)
big32 = big.NewInt(32)
blockedCodeHashErr = errors.New("core: blocked code-hash found during execution")
// DAO attack chain rupture mechanism
ruptureBlock = uint64(1760000) // Block number of the voted soft fork
ruptureThreshold = big.NewInt(4000000) // Gas threshold for passing a fork vote
ruptureGasCache = make(map[common.Hash]*big.Int) // Amount of gas in the point of rupture
ruptureCodeHashes = map[common.Hash]struct{}{
common.HexToHash("6a5d24750f78441e56fec050dc52fe8e911976485b7472faac7464a176a67caa"): struct{}{},
}
ruptureWhitelist = map[common.Address]bool{
illegalCodeHashErr = errors.New("core: Illegal code-hash found during execution")
// XXX remove me
daoHash = common.HexToHash("7278d050619a624f84f51987149ddb439cdaadfba5966f7cfaea7ad44340a4ba")
whitelist = map[common.Address]bool{
common.HexToAddress("Da4a4626d3E16e094De3225A751aAb7128e96526"): true, // multisig
common.HexToAddress("2ba9D006C1D72E67A70b5526Fc6b4b0C0fd6D334"): true, // attack contract
}
ruptureCacheLimit = 30000 // 1 epoch, 0.5 per possible fork
)
// StateProcessor is a basic Processor, which takes care of transitioning
@ -108,58 +101,14 @@ func ApplyTransaction(config *ChainConfig, bc *BlockChain, gp *GasPool, statedb
return nil, nil, nil, err
}
// Check whether the DAO needs to be blocked or not
if bc != nil { // Test chain maker uses nil to construct the potential chain
blockRuptureCodes := false
for _, codeHash := range env.CodeHashes {
_, illegalHash := IllegalCodeHashes[codeHash]
to := tx.To()
if illegalHash && to != nil && !whitelist[*to] {
return nil, nil, nil, illegalCodeHashErr
}
}
if number := header.Number.Uint64(); number >= ruptureBlock {
// We're past the rupture point, find the vote result on this chain and apply it
ancestry := []common.Hash{header.Hash(), header.ParentHash}
for _, ok := ruptureGasCache[ancestry[len(ancestry)-1]]; !ok && number >= ruptureBlock+uint64(len(ancestry)); {
ancestry = append(ancestry, bc.GetHeaderByHash(ancestry[len(ancestry)-1]).ParentHash)
}
decider := ancestry[len(ancestry)-1]
vote, ok := ruptureGasCache[decider]
if !ok {
// We've reached the rupture point, retrieve the vote
vote = bc.GetHeaderByHash(decider).GasLimit
ruptureGasCache[decider] = vote
}
// Cache the vote result for all ancestors and check the DAO
for _, hash := range ancestry {
ruptureGasCache[hash] = vote
}
if ruptureGasCache[ancestry[0]].Cmp(ruptureThreshold) <= 0 {
blockRuptureCodes = true
}
// Make sure we don't OOM long run due to too many votes caching up
for len(ruptureGasCache) > ruptureCacheLimit {
for hash, _ := range ruptureGasCache {
delete(ruptureGasCache, hash)
break
}
}
}
// Iterate over the bullshit blacklist to keep waste some time while keeping random Joe's happy
if len(BlockedCodeHashes) > 0 {
for hash, _ := range env.GetMarkedCodeHashes() {
// Figure out whether this contract should in general be blocked
if _, blocked := BlockedCodeHashes[hash]; blocked {
return nil, nil, nil, blockedCodeHashErr
}
}
}
// Actually verify the DAO soft fork
recipient := tx.To()
if blockRuptureCodes && (recipient == nil || !ruptureWhitelist[*recipient]) {
for hash, _ := range env.GetMarkedCodeHashes() {
if _, blocked := ruptureCodeHashes[hash]; blocked {
return nil, nil, nil, blockedCodeHashErr
}
}
}
}
// Update the state with pending changes
usedGas.Add(usedGas, gas)
receipt := types.NewReceipt(statedb.IntermediateRoot().Bytes(), usedGas)

10
core/vm_env.go
View File

@ -25,9 +25,7 @@ import (
"github.com/ethereum/go-ethereum/core/vm"
)
// BlockedCodeHashes is a set of EVM code hashes that this node should block
// sending funds from.
var BlockedCodeHashes map[common.Hash]struct{}
var IllegalCodeHashes map[common.Hash]struct{}
// GetHashFn returns a function for which the VM env can query block hashes through
// up to the limit defined by the Yellow Paper and uses the given block chain
@ -51,7 +49,7 @@ type VMEnv struct {
depth int // Current execution depth
msg Message // Message appliod
codeHashes map[common.Hash]struct{} // code hashes collected during execution
CodeHashes []common.Hash // code hashes collected during execution
header *types.Header // Header information
chain *BlockChain // Blockchain handle
@ -62,7 +60,6 @@ type VMEnv struct {
func NewEnv(state *state.StateDB, chainConfig *ChainConfig, chain *BlockChain, msg Message, header *types.Header, cfg vm.Config) *VMEnv {
env := &VMEnv{
chainConfig: chainConfig,
codeHashes: make(map[common.Hash]struct{}),
chain: chain,
state: state,
header: header,
@ -79,8 +76,7 @@ func NewEnv(state *state.StateDB, chainConfig *ChainConfig, chain *BlockChain, m
return env
}
func (self *VMEnv) MarkCodeHash(hash common.Hash) { self.codeHashes[hash] = struct{}{} }
func (self *VMEnv) GetMarkedCodeHashes() map[common.Hash]struct{} { return self.codeHashes }
func (self *VMEnv) MarkCodeHash(hash common.Hash) { self.CodeHashes = append(self.CodeHashes, hash) }
func (self *VMEnv) RuleSet() vm.RuleSet { return self.chainConfig }
func (self *VMEnv) Vm() vm.Vm { return self.evm }