From 1f1ea18b5414bea22332bb4fce53cc95b5c6a07d Mon Sep 17 00:00:00 2001 From: Felix Lange Date: Tue, 4 Oct 2016 12:36:02 +0200 Subject: core/state: implement reverts by journaling all changes 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! --- core/execution.go | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'core/execution.go') diff --git a/core/execution.go b/core/execution.go index 1bc02f7fb..1cb507ee7 100644 --- a/core/execution.go +++ b/core/execution.go @@ -85,7 +85,7 @@ func exec(env vm.Environment, caller vm.ContractRef, address, codeAddr *common.A createAccount = true } - snapshotPreTransfer := env.MakeSnapshot() + snapshotPreTransfer := env.SnapshotDatabase() var ( from = env.Db().GetAccount(caller.Address()) to vm.Account @@ -129,7 +129,7 @@ func exec(env vm.Environment, caller vm.ContractRef, address, codeAddr *common.A if err != nil && (env.RuleSet().IsHomestead(env.BlockNumber()) || err != vm.CodeStoreOutOfGasError) { contract.UseGas(contract.Gas) - env.SetSnapshot(snapshotPreTransfer) + env.RevertToSnapshot(snapshotPreTransfer) } return ret, addr, err @@ -144,7 +144,7 @@ func execDelegateCall(env vm.Environment, caller vm.ContractRef, originAddr, toA return nil, common.Address{}, vm.DepthError } - snapshot := env.MakeSnapshot() + snapshot := env.SnapshotDatabase() var to vm.Account if !env.Db().Exist(*toAddr) { @@ -162,7 +162,7 @@ func execDelegateCall(env vm.Environment, caller vm.ContractRef, originAddr, toA if err != nil { contract.UseGas(contract.Gas) - env.SetSnapshot(snapshot) + env.RevertToSnapshot(snapshot) } return ret, addr, err -- cgit v1.2.3