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core/state: implement reverts by journaling all changes

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This commit replaces the deep-copy based state revert mechanism with a
linear complexity journal. This commit also hides several internal
StateDB methods to limit the number of ways in which calling code can
use the journal incorrectly.

As usual consultation and bug fixes to the initial implementation were
provided by @karalabe, @obscuren and @Arachnid. Thank you!
This commit is contained in:
Felix Lange
2016-10-04 12:36:02 +02:00
parent ab7adb0027
commit 1f1ea18b54
24 changed files with 670 additions and 253 deletions
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6
eth/api_backend.go
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@ -98,12 +98,12 @@ func (b *EthApiBackend) GetTd(blockHash common.Hash) *big.Int {
}
func (b *EthApiBackend) GetVMEnv(ctx context.Context, msg core.Message, state ethapi.State, header *types.Header) (vm.Environment, func() error, error) {
stateDb := state.(EthApiState).state.Copy()
statedb := state.(EthApiState).state
addr, _ := msg.From()
from := stateDb.GetOrNewStateObject(addr)
from := statedb.GetOrNewStateObject(addr)
from.SetBalance(common.MaxBig)
vmError := func() error { return nil }
return core.NewEnv(stateDb, b.eth.chainConfig, b.eth.blockchain, msg, header, b.eth.chainConfig.VmConfig), vmError, nil
return core.NewEnv(statedb, b.eth.chainConfig, b.eth.blockchain, msg, header, b.eth.chainConfig.VmConfig), vmError, nil
}
func (b *EthApiBackend) SendTx(ctx context.Context, signedTx *types.Transaction) error {