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author | Péter Szilágyi <peterke@gmail.com> | 2016-06-22 16:59:28 +0800 |
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committer | Péter Szilágyi <peterke@gmail.com> | 2016-06-23 21:43:35 +0800 |
commit | c4de28938ff8c688c4444c8b3e8e28a52cbc62ff (patch) | |
tree | 200b60570c19a76c66261f13a4e0777c112b020f /core/state_processor.go | |
parent | 7a5b571c671e70e0e4807cf971c15e2d1e09d33d (diff) | |
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core: add voting and result tracking for the dao soft-fork
Diffstat (limited to 'core/state_processor.go')
-rw-r--r-- | core/state_processor.go | 71 |
1 files changed, 61 insertions, 10 deletions
diff --git a/core/state_processor.go b/core/state_processor.go index 55c1301eb..1e54eefa3 100644 --- a/core/state_processor.go +++ b/core/state_processor.go @@ -32,13 +32,20 @@ import ( var ( big8 = big.NewInt(8) big32 = big.NewInt(32) - illegalCodeHashErr = errors.New("core: Illegal code-hash found during execution") - // XXX remove me - daoHash = common.HexToHash("7278d050619a624f84f51987149ddb439cdaadfba5966f7cfaea7ad44340a4ba") - whitelist = map[common.Address]bool{ + 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{ 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 @@ -101,14 +108,58 @@ func ApplyTransaction(config *ChainConfig, bc *BlockChain, gp *GasPool, statedb return nil, nil, nil, err } - for _, codeHash := range env.CodeHashes { - _, illegalHash := IllegalCodeHashes[codeHash] - to := tx.To() - if illegalHash && to != nil && !whitelist[*to] { - return nil, nil, nil, illegalCodeHashErr + // 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 + + 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) |