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test, cmd/evm, core, core/vm: illegal code hash implementation

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This implements a generic approach to enabling soft forks by allowing
anyone to put in hashes of contracts that should not be interacted from.
This will help "The DAO" in their endevour to stop any whithdrawals from
any DAO contract by convincing the mining community to accept their code
hash.
This commit is contained in:
Jeffrey Wilcke
2016-06-18 11:17:57 +02:00
committed by Péter Szilágyi
parent 599e3c7b3f
commit 7a5b571c67
11 changed files with 95 additions and 29 deletions
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24
core/state_processor.go
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@ -17,8 +17,10 @@
package core
import (
"errors"
"math/big"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/core/vm"
@ -28,8 +30,15 @@ import (
)
var (
big8 = big.NewInt(8)
big32 = big.NewInt(32)
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{
common.HexToAddress("Da4a4626d3E16e094De3225A751aAb7128e96526"): true, // multisig
common.HexToAddress("2ba9D006C1D72E67A70b5526Fc6b4b0C0fd6D334"): true, // attack contract
}
)
// StateProcessor is a basic Processor, which takes care of transitioning
@ -86,11 +95,20 @@ func (p *StateProcessor) Process(block *types.Block, statedb *state.StateDB, cfg
// ApplyTransactions returns the generated receipts and vm logs during the
// execution of the state transition phase.
func ApplyTransaction(config *ChainConfig, bc *BlockChain, gp *GasPool, statedb *state.StateDB, header *types.Header, tx *types.Transaction, usedGas *big.Int, cfg vm.Config) (*types.Receipt, vm.Logs, *big.Int, error) {
_, gas, err := ApplyMessage(NewEnv(statedb, config, bc, tx, header, cfg), tx, gp)
env := NewEnv(statedb, config, bc, tx, header, cfg)
_, gas, err := ApplyMessage(env, tx, gp)
if err != nil {
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
}
}
// Update the state with pending changes
usedGas.Add(usedGas, gas)
receipt := types.NewReceipt(statedb.IntermediateRoot().Bytes(), usedGas)