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Merge pull request #683 from onflow/leo/extract-evm-state
Extract EVM state
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,80 @@ | ||
| package export | ||
|
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| import ( | ||
| "fmt" | ||
|
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| "github.com/rs/zerolog/log" | ||
| "github.com/spf13/cobra" | ||
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| "github.com/onflow/flow-evm-gateway/storage/pebble" | ||
| "github.com/onflow/flow-go/fvm/evm" | ||
| "github.com/onflow/flow-go/fvm/evm/emulator/state" | ||
| "github.com/onflow/flow-go/fvm/evm/offchain/storage" | ||
| flowGo "github.com/onflow/flow-go/model/flow" | ||
| ) | ||
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| var Cmd = &cobra.Command{ | ||
| Use: "export-evm-state", | ||
| Short: "Export EVM state at a specific height", | ||
| RunE: func(*cobra.Command, []string) error { | ||
| if height == 0 || outputDir == "" || registerStoreDir == "" { | ||
| return fmt.Errorf("all flags (height, output, register-store) must be provided") | ||
| } | ||
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| log.Info().Msgf("exporting EVM state for height %v from registerStoreDir %v, outputDir: %v, chain: %v", height, registerStoreDir, outputDir, chain) | ||
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| chainID := flowGo.ChainID(chain) | ||
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| err := ExportEVMStateForHeight(height, outputDir, registerStoreDir, chainID) | ||
| if err != nil { | ||
| return fmt.Errorf("fail to export: %w", err) | ||
| } | ||
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| log.Info().Msgf("successfully exported EVM state to %v", outputDir) | ||
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| return nil | ||
| }, | ||
| } | ||
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| var ( | ||
| height uint64 | ||
| outputDir string | ||
| chain string | ||
| registerStoreDir string | ||
| ) | ||
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| func init() { | ||
| Cmd.Flags().Uint64Var(&height, "evm-height", 0, "EVM Block height for EVM state export") | ||
| Cmd.Flags().StringVar(&outputDir, "output", "", "Output directory for exported EVM state") | ||
| Cmd.Flags().StringVar(&chain, "chain-id", "testnet", "Chain ID for the EVM state") | ||
| Cmd.Flags().StringVar(®isterStoreDir, "register-store", "", "Directory of the register store") | ||
| } | ||
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| func ExportEVMStateForHeight(height uint64, outputDir string, registerStoreDir string, chainID flowGo.ChainID) error { | ||
| storageAddress := evm.StorageAccountAddress(chainID) | ||
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| pebbleDB, err := pebble.OpenDB(registerStoreDir) | ||
| if err != nil { | ||
| return fmt.Errorf("failed to open pebble db: %w", err) | ||
| } | ||
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| store := pebble.New(pebbleDB, log.Logger) | ||
| registerStore := pebble.NewRegisterStorage(store, storageAddress) | ||
| snapshot, err := registerStore.GetSnapshotAt(height) | ||
| if err != nil { | ||
| return err | ||
| } | ||
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| ledger := storage.NewReadOnlyStorage(snapshot) | ||
| exporter, err := state.NewExporter(ledger, storageAddress) | ||
| if err != nil { | ||
| return err | ||
| } | ||
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| err = exporter.ExportGob(outputDir) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
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| return nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,36 @@ | ||
| package evm | ||
|
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| import ( | ||
| "fmt" | ||
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| "github.com/onflow/flow-evm-gateway/storage/pebble" | ||
| "github.com/onflow/flow-go/fvm/evm" | ||
| "github.com/onflow/flow-go/fvm/evm/emulator/state" | ||
| "github.com/onflow/flow-go/fvm/evm/offchain/storage" | ||
| flowGo "github.com/onflow/flow-go/model/flow" | ||
| ) | ||
|
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| func ExtractEVMState( | ||
| chainID flowGo.ChainID, | ||
| evmHeight uint64, | ||
| store *pebble.Storage, | ||
| ) (*state.EVMState, error) { | ||
| storageRoot := evm.StorageAccountAddress(chainID) | ||
| registerStore := pebble.NewRegisterStorage(store, storageRoot) | ||
| snapshot, err := registerStore.GetSnapshotAt(evmHeight) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to get snapshot at evm height %d: %w", evmHeight, err) | ||
| } | ||
|
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| ledger := storage.NewReadOnlyStorage(snapshot) | ||
| bv, err := state.NewBaseView(ledger, storageRoot) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("failed to create base view: %w", err) | ||
| } | ||
|
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| evmState, err := state.Extract(storageRoot, bv) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return evmState, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,46 @@ | ||
| package evm_test | ||
|
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| import ( | ||
| "fmt" | ||
| "testing" | ||
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| "github.com/onflow/flow-evm-gateway/storage/pebble" | ||
| "github.com/onflow/flow-go/fvm/evm/emulator/state" | ||
| flowGo "github.com/onflow/flow-go/model/flow" | ||
| "github.com/rs/zerolog/log" | ||
| "github.com/stretchr/testify/require" | ||
|
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| evmState "github.com/onflow/flow-evm-gateway/services/evm" | ||
| ) | ||
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| func StateDiff(t *testing.T) { | ||
| state1 := extractEVMState(t, flowGo.Testnet, "/var/flow52/evm/data/db", uint64(17724990)) | ||
| state2 := evmStateFromCheckpointExtract(t, "/var/flow52/evm-state-from-checkpoint-228901661") | ||
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| differences := state.Diff(state1, state2) | ||
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| for i, diff := range differences { | ||
| fmt.Printf("Difference %d: %v\n", i, diff) | ||
| } | ||
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| require.Len(t, differences, 0) | ||
| } | ||
|
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| func extractEVMState( | ||
| t *testing.T, chainID flowGo.ChainID, | ||
| registerStoreDir string, evmHeight uint64) *state.EVMState { | ||
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| pebbleDB, err := pebble.OpenDB(registerStoreDir) | ||
| require.NoError(t, err) | ||
| store := pebble.New(pebbleDB, log.Logger) | ||
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| evmState, err := evmState.ExtractEVMState(chainID, evmHeight, store) | ||
| require.NoError(t, err) | ||
| return evmState | ||
| } | ||
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| func evmStateFromCheckpointExtract(t *testing.T, dir string) *state.EVMState { | ||
| enState, err := state.ImportEVMStateFromGob(dir) | ||
| require.NoError(t, err) | ||
| return enState | ||
| } |
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