diff options
| -rw-r--r-- | cmd/utils/flags.go | 14 | ||||
| -rw-r--r-- | core/dao_test.go | 358 | ||||
| -rw-r--r-- | core/execution.go | 3 | ||||
| -rw-r--r-- | core/state_processor.go | 71 | ||||
| -rw-r--r-- | core/vm_env.go | 10 |
5 files changed, 436 insertions, 20 deletions
diff --git a/cmd/utils/flags.go b/cmd/utils/flags.go index 802e54c73..c732a6635 100644 --- a/cmd/utils/flags.go +++ b/cmd/utils/flags.go @@ -163,8 +163,8 @@ var ( } // Miner settings // TODO: refactor CPU vs GPU mining flags - IllegalCodeHashesFlag = cli.StringFlag{ - Name: "illegal-code-hashes", + BlockedCodeHashesFlag = cli.StringFlag{ + Name: "blocked-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 } -// ParseIllegalCodeHashes parses a comma separated list of hashes. -func ParseIllegalCodeHashes(ctx *cli.Context) map[common.Hash]struct{} { - splittedHexHashes := strings.Split(ctx.GlobalString(IllegalCodeHashesFlag.Name), ",") +// MakeBlockedCodeHashes parses a comma separated list of hashes. +func MakeBlockedCodeHashes(ctx *cli.Context) map[common.Hash]struct{} { + splittedHexHashes := strings.Split(ctx.GlobalString(BlockedCodeHashesFlag.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 illegal code hashes and set them to the core package. - core.IllegalCodeHashes = ParseIllegalCodeHashes(ctx) + // parse the blocked code hashes and set them to the core package. + core.BlockedCodeHashes = MakeBlockedCodeHashes(ctx) // initialise new random number generator rand := rand.New(rand.NewSource(time.Now().UnixNano())) diff --git a/core/dao_test.go b/core/dao_test.go new file mode 100644 index 000000000..12fa2ddd7 --- /dev/null +++ b/core/dao_test.go @@ -0,0 +1,358 @@ +// Copyright 2016 The go-ethereum Authors +// This file is part of the go-ethereum library. +// +// The go-ethereum library is free software: you can redistribute it and/or modify +// it under the terms of the GNU Lesser General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. +// +// The go-ethereum library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU Lesser General Public License for more details. +// +// You should have received a copy of the GNU Lesser General Public License +// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>. + +package core + +import ( + "math/big" + "testing" + + "github.com/ethereum/go-ethereum/common" + "github.com/ethereum/go-ethereum/core/types" + "github.com/ethereum/go-ethereum/crypto" + "github.com/ethereum/go-ethereum/ethdb" + "github.com/ethereum/go-ethereum/event" + "github.com/ethereum/go-ethereum/params" +) + +// Some weird dependency for deploying a DAO instance. +var creatorDeployCode = 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+ +// EVM deploy bytecode of the DAO to simulate blocking. +var daoDeployCode = common.FromHex("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+ +// Proxy contract to whitelist interaction with: +// +// contract Proxy { +// address _dao; +// +// function Proxy(address dao) { +// _dao = dao; +// } +// function() { +// if (msg.value > 0) { +// _dao.call.value(msg.value)(); +// } else { +// _dao.call(bytes4(sha3("refund()"))); +// } +// } +// } +var proxyDeployCode = common.FromHex("606060405260405160208060dd83395060806040525160008054600160a060020a031916821790555060a98060346000396000f360606040523615600a575b60486000341115604a576000805473ffffffffffffffffffffffffffffffffffffffff1690349060609081818185876185025a03f1925050505060a7565b005b600080547f590e1ae300000000000000000000000000000000000000000000000000000000606090815273ffffffffffffffffffffffffffffffffffffffff9091169163590e1ae3916064919060048183876161da5a03f1505050505b56") + +// Tests that unannimous votes are handled correctly (i.e. the simple case). +func TestDAOForkUnanimousFail(t *testing.T) { testDAOUnanimousFork(t, false) } +func TestDAOForkUnanimousPass(t *testing.T) { testDAOUnanimousFork(t, true) } + +func testDAOUnanimousFork(t *testing.T, pass bool) { + // Reduce the test size to avoid wasting too much time + defer func(old uint64) { ruptureBlock = old }(ruptureBlock) + ruptureBlock = 128 + + defer func(old int) { ruptureCacheLimit = old }(ruptureCacheLimit) + ruptureCacheLimit = 256 + + // Depending on the tested outcome, set a high or a low gas limit + defer func(old *big.Int) { params.GenesisGasLimit = old }(params.GenesisGasLimit) + defer func(old *big.Int) { params.TargetGasLimit = old }(params.TargetGasLimit) + if pass { + params.GenesisGasLimit = new(big.Int).Add(ruptureThreshold, big.NewInt(-10)) + params.TargetGasLimit = new(big.Int).Add(ruptureThreshold, big.NewInt(-10)) + } else { + params.GenesisGasLimit = new(big.Int).Add(ruptureThreshold, big.NewInt(10)) + params.TargetGasLimit = new(big.Int).Add(ruptureThreshold, big.NewInt(10)) + } + // Create a test chain with a DAO instance deployed and attempt to transact with it + var ( + slockit, _ = crypto.HexToECDSA("49a7b37aa6f6645917e7b807e9d1c00d4fa71f18343b0d4122a4d2df64dd6fee") + black, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291") + white, _ = crypto.HexToECDSA("8a1f9a8f95be41cd7ccb6168179afb4504aefe388d1e14474d32c45c72ce7b7a") + slockitAddr = crypto.PubkeyToAddress(slockit.PublicKey) + blackAddr = crypto.PubkeyToAddress(black.PublicKey) + whiteAddr = crypto.PubkeyToAddress(white.PublicKey) + creatorAddr common.Address + daoAddr common.Address + blackProxy common.Address + whiteProxy common.Address + db, _ = ethdb.NewMemDatabase() + ) + genesis := WriteGenesisBlockForTesting(db, + GenesisAccount{slockitAddr, big.NewInt(1000000)}, + GenesisAccount{blackAddr, big.NewInt(1000000)}, + GenesisAccount{whiteAddr, big.NewInt(1000000)}, + ) + length := int(ruptureBlock) + 2*ruptureCacheLimit + chain, _ := GenerateChain(genesis, db, length, func(i int, gen *BlockGen) { + switch i { + case 0: + // Deploy the DAO creator in the first block + tx, _ := types.NewContractCreation(gen.TxNonce(slockitAddr), big.NewInt(1), params.GenesisGasLimit, new(big.Int), creatorDeployCode).SignECDSA(slockit) + gen.AddTx(tx) + creatorAddr = crypto.CreateAddress(slockitAddr, tx.Nonce()) + + case 1: + // Deploy the DAO in the second block + var args []byte + args = append(args, common.LeftPadBytes(slockitAddr.Bytes(), 32)...) // curator + args = append(args, common.LeftPadBytes(creatorAddr.Bytes(), 32)...) // daoCreator + args = append(args, common.LeftPadBytes([]byte{0}, 32)...) // proposalDeposit + args = append(args, common.LeftPadBytes([]byte{100}, 32)...) // minTokensToCreate + args = append(args, common.LeftPadBytes([]byte{100}, 32)...) // closingTime + args = append(args, common.LeftPadBytes([]byte{0}, 32)...) // privateCreation + + tx, _ := types.NewContractCreation(gen.TxNonce(slockitAddr), big.NewInt(0), params.GenesisGasLimit, new(big.Int), append(daoDeployCode, args...)).SignECDSA(slockit) + gen.AddTx(tx) + daoAddr = crypto.CreateAddress(slockitAddr, tx.Nonce()) + + case 2: + // Deploy the black and white hat proxy contracts + tx, _ := types.NewContractCreation(gen.TxNonce(blackAddr), big.NewInt(1), big.NewInt(1000000), new(big.Int), append(proxyDeployCode, common.LeftPadBytes(daoAddr.Bytes(), 32)...)).SignECDSA(black) + gen.AddTx(tx) + blackProxy = crypto.CreateAddress(blackAddr, tx.Nonce()) + + tx, _ = types.NewContractCreation(gen.TxNonce(whiteAddr), big.NewInt(1), big.NewInt(1000000), new(big.Int), append(proxyDeployCode, common.LeftPadBytes(daoAddr.Bytes(), 32)...)).SignECDSA(white) + gen.AddTx(tx) + whiteProxy = crypto.CreateAddress(whiteAddr, tx.Nonce()) + + ruptureWhitelist[whiteProxy] = true + + case 3: + // Fund the DAO with some funds, but not enough for successful creation + tx, _ := types.NewTransaction(gen.TxNonce(whiteAddr), whiteProxy, big.NewInt(2), big.NewInt(1000000), nil, nil).SignECDSA(white) + gen.AddTx(tx) + + tx, _ = types.NewTransaction(gen.TxNonce(blackAddr), blackProxy, big.NewInt(2), big.NewInt(1000000), nil, nil).SignECDSA(black) + gen.AddTx(tx) + + case length - 2: + // DAO creation failed by this time and forks are in effect; try retrieving whitelisted funds + tx, _ := types.NewTransaction(gen.TxNonce(whiteAddr), whiteProxy, big.NewInt(0), big.NewInt(1000000), nil, nil).SignECDSA(white) + gen.AddTx(tx) + + case length - 1: + // DAO creation failed by this time and forks are in effect; try retrieving blacklisted funds + tx, _ := types.NewTransaction(gen.TxNonce(blackAddr), blackProxy, big.NewInt(0), big.NewInt(1000000), nil, nil).SignECDSA(black) + gen.AddTx(tx) + } + }) + defer delete(ruptureWhitelist, whiteProxy) // This can't be done in the aboge generator sadly + + // Import the chain. This runs all block validation rules. + bc, _ := NewBlockChain(db, MakeChainConfig(), FakePow{}, new(event.TypeMux)) + n, err := bc.InsertChain(chain) + + // The chain should either succeed (no votes), or fail on the black address + if !pass { + if err != nil { + t.Errorf("block %d rejected on non forked chain: %v", n, err) + } + } else { + if n != length-1 || err != blockedCodeHashErr { + t.Errorf("failure mismatch: have %d:%v, want %d:%v", n, err, length-1, blockedCodeHashErr) + } + } + // Verify account balances to make sure transactions executd properly, not just the test is bugged + state, _ := bc.State() + if state.GetBalance(whiteProxy).Cmp(big.NewInt(3)) != 0 { // 1 init + 2 refund + t.Errorf("white proxy balance mismatch: have %v, want 3", state.GetBalance(whiteProxy)) + } + if !pass { + if state.GetBalance(blackProxy).Cmp(big.NewInt(3)) != 0 { // 1 init + 2 refund (fork refused) + t.Errorf("black proxy balance mismatch: have %v, want 3", state.GetBalance(blackProxy)) + } + if state.GetBalance(daoAddr).Cmp(big.NewInt(0)) != 0 { // all refunded (fork refused) + t.Errorf("dao balance mismatch: have %v, want 0", state.GetBalance(daoAddr)) + } + } else { + if state.GetBalance(blackProxy).Cmp(big.NewInt(1)) != 0 { // 1 init (refund refused due to fork) + t.Errorf("black proxy balance mismatch: have %v, want 1", state.GetBalance(blackProxy)) + } + if state.GetBalance(daoAddr).Cmp(big.NewInt(2)) != 0 { // 2 from black (refund refused due to fork) + t.Errorf("dao balance mismatch: have %v, want 2", state.GetBalance(daoAddr)) + } + } +} + +// Tests the unique corner case where miners don't cleanly decide on the outcome +// of the vote, rather +func TestDAOForkRaceyResolution(t *testing.T) { + // Reduce the test size to avoid wasting too much time + defer func(old uint64) { ruptureBlock = old }(ruptureBlock) + ruptureBlock = 128 + + defer func(old int) { ruptureCacheLimit = old }(ruptureCacheLimit) + ruptureCacheLimit = 256 + + // Set up the parameters of the test chain + var ( + slockit, _ = crypto.HexToECDSA("49a7b37aa6f6645917e7b807e9d1c00d4fa71f18343b0d4122a4d2df64dd6fee") + black, _ = crypto.HexToECDSA("b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291") + white, _ = crypto.HexToECDSA("8a1f9a8f95be41cd7ccb6168179afb4504aefe388d1e14474d32c45c72ce7b7a") + slockitAddr = crypto.PubkeyToAddress(slockit.PublicKey) + blackAddr = crypto.PubkeyToAddress(black.PublicKey) + whiteAddr = crypto.PubkeyToAddress(white.PublicKey) + creatorAddr common.Address + daoAddr common.Address + blackProxy common.Address + whiteProxy common.Address + db, _ = ethdb.NewMemDatabase() + ) + defer func(old *big.Int) { params.GenesisGasLimit = old }(params.GenesisGasLimit) + params.GenesisGasLimit = ruptureThreshold + + genesis := WriteGenesisBlockForTesting(db, + GenesisAccount{slockitAddr, big.NewInt(1000000)}, + GenesisAccount{blackAddr, big.NewInt(1000000)}, + GenesisAccount{whiteAddr, big.NewInt(1000000)}, + ) + // Generate a chain where the outcome for the fork proposal is pass + defer func(old *big.Int) { params.TargetGasLimit = old }(params.TargetGasLimit) + params.TargetGasLimit = new(big.Int).Add(ruptureThreshold, big.NewInt(-10)) + + length := int(ruptureBlock) + 2*ruptureCacheLimit + chainPass, _ := GenerateChain(genesis, db, length, func(i int, gen *BlockGen) { + switch i { + case 0: + // Deploy the DAO creator in the first block + tx, _ := types.NewContractCreation(gen.TxNonce(slockitAddr), big.NewInt(1), big.NewInt(3999980), new(big.Int), creatorDeployCode).SignECDSA(slockit) + gen.AddTx(tx) + creatorAddr = crypto.CreateAddress(slockitAddr, tx.Nonce()) + + case 1: + // Deploy the DAO in the second block + var args []byte + args = append(args, common.LeftPadBytes(slockitAddr.Bytes(), 32)...) // curator + args = append(args, common.LeftPadBytes(creatorAddr.Bytes(), 32)...) // daoCreator + args = append(args, common.LeftPadBytes([]byte{0}, 32)...) // proposalDeposit + args = append(args, common.LeftPadBytes([]byte{100}, 32)...) // minTokensToCreate + args = append(args, common.LeftPadBytes([]byte{100}, 32)...) // closingTime + args = append(args, common.LeftPadBytes([]byte{0}, 32)...) // privateCreation + + tx, _ := types.NewContractCreation(gen.TxNonce(slockitAddr), big.NewInt(0), big.NewInt(3999980), new(big.Int), append(daoDeployCode, args...)).SignECDSA(slockit) + gen.AddTx(tx) + daoAddr = crypto.CreateAddress(slockitAddr, tx.Nonce()) + + case 2: + // Deploy the black and white hat proxy contracts + tx, _ := types.NewContractCreation(gen.TxNonce(blackAddr), big.NewInt(1), big.NewInt(1000000), new(big.Int), append(proxyDeployCode, common.LeftPadBytes(daoAddr.Bytes(), 32)...)).SignECDSA(black) + gen.AddTx(tx) + blackProxy = crypto.CreateAddress(blackAddr, tx.Nonce()) + + tx, _ = types.NewContractCreation(gen.TxNonce(whiteAddr), big.NewInt(1), big.NewInt(1000000), new(big.Int), append(proxyDeployCode, common.LeftPadBytes(daoAddr.Bytes(), 32)...)).SignECDSA(white) + gen.AddTx(tx) + whiteProxy = crypto.CreateAddress(whiteAddr, tx.Nonce()) + + ruptureWhitelist[whiteProxy] = true + + case 3: + // Fund the DAO with some funds, but not enough for successful creation + tx, _ := types.NewTransaction(gen.TxNonce(whiteAddr), whiteProxy, big.NewInt(2), big.NewInt(1000000), nil, nil).SignECDSA(white) + gen.AddTx(tx) + + tx, _ = types.NewTransaction(gen.TxNonce(blackAddr), blackProxy, big.NewInt(2), big.NewInt(1000000), nil, nil).SignECDSA(black) + gen.AddTx(tx) + + case length - 2: + // DAO creation failed by this time and forks are in effect; try retrieving whitelisted funds + tx, _ := types.NewTransaction(gen.TxNonce(whiteAddr), whiteProxy, big.NewInt(0), big.NewInt(1000000), nil, nil).SignECDSA(white) + gen.AddTx(tx) + + case length - 1: + // DAO creation failed by this time and forks are in effect; try retrieving blacklisted funds + tx, _ := types.NewTransaction(gen.TxNonce(blackAddr), blackProxy, big.NewInt(0), big.NewInt(1000000), nil, nil).SignECDSA(black) + gen.AddTx(tx) + } + }) + // Generate a chain to work around the last bad block above + chainPassCont, _ := GenerateChain(chainPass[len(chainPass)-2], db, 3, func(i int, gen *BlockGen) {}) + + // Generate a fork of the chain where the outcome of the fork proposal is fail + params.TargetGasLimit = new(big.Int).Add(ruptureThreshold, big.NewInt(10)) + chainFail, _ := GenerateChain(chainPass[4], db, length-4, func(i int, gen *BlockGen) { // Start fro block #4 to reuse previous creation code + switch i { + case length - 4 - 2: + // DAO creation failed by this time and forks are in effect; try retrieving whitelisted funds + tx, _ := types.NewTransaction(gen.TxNonce(whiteAddr), whiteProxy, big.NewInt(0), big.NewInt(1000000), nil, nil).SignECDSA(white) + gen.AddTx(tx) + + case length - 4 - 1: + // DAO creation failed by this time and forks are in effect; try retrieving blacklisted funds + tx, _ := types.NewTransaction(gen.TxNonce(blackAddr), blackProxy, big.NewInt(0), big.NewInt(1000000), nil, nil).SignECDSA(black) + gen.AddTx(tx) + } + }) + defer delete(ruptureWhitelist, whiteProxy) // This can't be done in the aboge generator sadly + + // Import the chain where the vote passed + bc, _ := NewBlockChain(db, MakeChainConfig(), FakePow{}, new(event.TypeMux)) + + if n, err := bc.InsertChain(chainPass); n != length-1 || err != blockedCodeHashErr { + t.Fatalf("forked chain error mismatch: have %v/%v, want %v/%v", n, err, length-1, blockedCodeHashErr) + } + state, _ := bc.State() + if state.GetBalance(whiteProxy).Cmp(big.NewInt(3)) != 0 { // 1 init + 2 refund + t.Errorf("white proxy balance mismatch: have %v, want 3", state.GetBalance(whiteProxy)) + } + if state.GetBalance(blackProxy).Cmp(big.NewInt(1)) != 0 { // 1 init (no refund on the passing chain) + t.Errorf("black proxy balance mismatch: have %v, want 1", state.GetBalance(blackProxy)) + } + if state.GetBalance(daoAddr).Cmp(big.NewInt(2)) != 0 { // 2 from black (refund refused due to fork) + t.Errorf("dao balance mismatch: have %v, want 2", state.GetBalance(daoAddr)) + } + // Import the chain where the vote failed (longer than the passing with 1 block (dropped from the passing)) + if _, err := bc.InsertChain(chainFail); err != nil { + t.Fatalf("failed to import non-forked chain: %v", err) + } + state, _ = bc.State() + if state.GetBalance(whiteProxy).Cmp(big.NewInt(3)) != 0 { // 1 init + 2 refund + t.Errorf("white proxy balance mismatch: have %v, want 3", state.GetBalance(whiteProxy)) + } + if state.GetBalance(blackProxy).Cmp(big.NewInt(3)) != 0 { // 1 init + 2 refund (fork refused) + t.Errorf("black proxy balance mismatch: have %v, want 3", state.GetBalance(blackProxy)) + } + if state.GetBalance(daoAddr).Cmp(big.NewInt(0)) != 0 { // all refunded (fork refused) + t.Errorf("dao balance mismatch: have %v, want 0", state.GetBalance(daoAddr)) + } + // Try to import a bad block on theforked chain to make sure no cache screwes up + if _, err := bc.InsertChain(chainPass[len(chainPass)-2:]); err != blockedCodeHashErr { + t.Fatalf("forked chain error mismatch: have %v, want %v", err, blockedCodeHashErr) + } + // The balances must still be that of the failed chain + state, _ = bc.State() + if state.GetBalance(whiteProxy).Cmp(big.NewInt(3)) != 0 { // 1 init + 2 refund + t.Errorf("white proxy balance mismatch: have %v, want 3", state.GetBalance(whiteProxy)) + } + if state.GetBalance(blackProxy).Cmp(big.NewInt(3)) != 0 { // 1 init + 2 refund (fork refused) + t.Errorf("black proxy balance mismatch: have %v, want 3", state.GetBalance(blackProxy)) + } + if state.GetBalance(daoAddr).Cmp(big.NewInt(0)) != 0 { // all refunded (fork refused) + t.Errorf("dao balance mismatch: have %v, want 0", state.GetBalance(daoAddr)) + } + // Overrule the passing chain with fresh blocks + if _, err := bc.InsertChain(chainPassCont); err != nil { + t.Fatalf("failed to import forked chain continuation: %v", err) + } + // Balances must be switched over to the forked version + state, _ = bc.State() + if state.GetBalance(whiteProxy).Cmp(big.NewInt(3)) != 0 { // 1 init + 2 refund + t.Errorf("white proxy balance mismatch: have %v, want 3", state.GetBalance(whiteProxy)) + } + if state.GetBalance(blackProxy).Cmp(big.NewInt(1)) != 0 { // 1 init (no refund on the passing chain) + t.Errorf("black proxy balance mismatch: have %v, want 1", state.GetBalance(blackProxy)) + } + if state.GetBalance(daoAddr).Cmp(big.NewInt(2)) != 0 { // 2 from black (refund refused due to fork) + t.Errorf("dao balance mismatch: have %v, want 2", state.GetBalance(daoAddr)) + } +} diff --git a/core/execution.go b/core/execution.go index ec04f6140..7f4c64758 100644 --- a/core/execution.go +++ b/core/execution.go @@ -149,6 +149,9 @@ 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 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) diff --git a/core/vm_env.go b/core/vm_env.go index 1c1110280..4692c14c4 100644 --- a/core/vm_env.go +++ b/core/vm_env.go @@ -25,7 +25,9 @@ import ( "github.com/ethereum/go-ethereum/core/vm" ) -var IllegalCodeHashes map[common.Hash]struct{} +// BlockedCodeHashes is a set of EVM code hashes that this node should block +// sending funds from. +var BlockedCodeHashes 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 @@ -49,7 +51,7 @@ type VMEnv struct { depth int // Current execution depth msg Message // Message appliod - CodeHashes []common.Hash // code hashes collected during execution + codeHashes map[common.Hash]struct{} // code hashes collected during execution header *types.Header // Header information chain *BlockChain // Blockchain handle @@ -60,6 +62,7 @@ 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, @@ -76,7 +79,8 @@ func NewEnv(state *state.StateDB, chainConfig *ChainConfig, chain *BlockChain, m return env } -func (self *VMEnv) MarkCodeHash(hash common.Hash) { self.CodeHashes = append(self.CodeHashes, hash) } +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) RuleSet() vm.RuleSet { return self.chainConfig } func (self *VMEnv) Vm() vm.Vm { return self.evm } |