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authorFelix Lange <fjl@twurst.com>2017-04-19 18:09:04 +0800
committerFelix Lange <fjl@twurst.com>2017-04-25 08:14:32 +0800
commit207bd7d2cddbf16ac2cb870fd6a1c558f02fd8ac (patch)
tree76f8494516a78869b98804bbaa34fc10240adbdf /eth/api.go
parent4047ccad2fb73fd2cfd69bf5b8cbfa788871ce0f (diff)
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eth: add debug_storageRangeAt
Diffstat (limited to 'eth/api.go')
-rw-r--r--eth/api.go127
1 files changed, 90 insertions, 37 deletions
diff --git a/eth/api.go b/eth/api.go
index b386c08b4..61f7bdd92 100644
--- a/eth/api.go
+++ b/eth/api.go
@@ -20,7 +20,6 @@ import (
"bytes"
"compress/gzip"
"context"
- "errors"
"fmt"
"io"
"io/ioutil"
@@ -41,6 +40,7 @@ import (
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/rlp"
"github.com/ethereum/go-ethereum/rpc"
+ "github.com/ethereum/go-ethereum/trie"
)
const defaultTraceTimeout = 5 * time.Second
@@ -526,59 +526,67 @@ func (api *PrivateDebugAPI) TraceTransaction(ctx context.Context, txHash common.
if tx == nil {
return nil, fmt.Errorf("transaction %x not found", txHash)
}
+ msg, context, statedb, err := api.computeTxEnv(blockHash, int(txIndex))
+ if err != nil {
+ return nil, err
+ }
+
+ // Run the transaction with tracing enabled.
+ vmenv := vm.NewEVM(context, statedb, api.config, vm.Config{Debug: true, Tracer: tracer})
+ ret, gas, err := core.ApplyMessage(vmenv, msg, new(core.GasPool).AddGas(tx.Gas()))
+ if err != nil {
+ return nil, fmt.Errorf("tracing failed: %v", err)
+ }
+ switch tracer := tracer.(type) {
+ case *vm.StructLogger:
+ return &ethapi.ExecutionResult{
+ Gas: gas,
+ ReturnValue: fmt.Sprintf("%x", ret),
+ StructLogs: ethapi.FormatLogs(tracer.StructLogs()),
+ }, nil
+ case *ethapi.JavascriptTracer:
+ return tracer.GetResult()
+ default:
+ panic(fmt.Sprintf("bad tracer type %T", tracer))
+ }
+}
+
+// computeTxEnv returns the execution environment of a certain transaction.
+func (api *PrivateDebugAPI) computeTxEnv(blockHash common.Hash, txIndex int) (core.Message, vm.Context, *state.StateDB, error) {
+ // Create the parent state.
block := api.eth.BlockChain().GetBlockByHash(blockHash)
if block == nil {
- return nil, fmt.Errorf("block %x not found", blockHash)
+ return nil, vm.Context{}, nil, fmt.Errorf("block %x not found", blockHash)
}
- // Create the state database to mutate and eventually trace
parent := api.eth.BlockChain().GetBlock(block.ParentHash(), block.NumberU64()-1)
if parent == nil {
- return nil, fmt.Errorf("block parent %x not found", block.ParentHash())
+ return nil, vm.Context{}, nil, fmt.Errorf("block parent %x not found", block.ParentHash())
}
- stateDb, err := api.eth.BlockChain().StateAt(parent.Root())
+ statedb, err := api.eth.BlockChain().StateAt(parent.Root())
if err != nil {
- return nil, err
+ return nil, vm.Context{}, nil, err
}
+ txs := block.Transactions()
+ // Recompute transactions up to the target index.
signer := types.MakeSigner(api.config, block.Number())
- // Mutate the state and trace the selected transaction
- for idx, tx := range block.Transactions() {
+ for idx, tx := range txs {
// Assemble the transaction call message
- msg, err := tx.AsMessage(signer)
- if err != nil {
- return nil, fmt.Errorf("sender retrieval failed: %v", err)
- }
+ msg, _ := tx.AsMessage(signer)
context := core.NewEVMContext(msg, block.Header(), api.eth.BlockChain(), nil)
-
- // Mutate the state if we haven't reached the tracing transaction yet
- if uint64(idx) < txIndex {
- vmenv := vm.NewEVM(context, stateDb, api.config, vm.Config{})
- _, _, err := core.ApplyMessage(vmenv, msg, new(core.GasPool).AddGas(tx.Gas()))
- if err != nil {
- return nil, fmt.Errorf("mutation failed: %v", err)
- }
- stateDb.DeleteSuicides()
- continue
+ if idx == txIndex {
+ return msg, context, statedb, nil
}
- vmenv := vm.NewEVM(context, stateDb, api.config, vm.Config{Debug: true, Tracer: tracer})
- ret, gas, err := core.ApplyMessage(vmenv, msg, new(core.GasPool).AddGas(tx.Gas()))
+ vmenv := vm.NewEVM(context, statedb, api.config, vm.Config{})
+ gp := new(core.GasPool).AddGas(tx.Gas())
+ _, _, err := core.ApplyMessage(vmenv, msg, gp)
if err != nil {
- return nil, fmt.Errorf("tracing failed: %v", err)
- }
-
- switch tracer := tracer.(type) {
- case *vm.StructLogger:
- return &ethapi.ExecutionResult{
- Gas: gas,
- ReturnValue: fmt.Sprintf("%x", ret),
- StructLogs: ethapi.FormatLogs(tracer.StructLogs()),
- }, nil
- case *ethapi.JavascriptTracer:
- return tracer.GetResult()
+ return nil, vm.Context{}, nil, fmt.Errorf("tx %x failed: %v", tx.Hash(), err)
}
+ statedb.DeleteSuicides()
}
- return nil, errors.New("database inconsistency")
+ return nil, vm.Context{}, nil, fmt.Errorf("tx index %d out of range for block %x", txIndex, blockHash)
}
// Preimage is a debug API function that returns the preimage for a sha3 hash, if known.
@@ -592,3 +600,48 @@ func (api *PrivateDebugAPI) Preimage(ctx context.Context, hash common.Hash) (hex
func (api *PrivateDebugAPI) GetBadBlocks(ctx context.Context) ([]core.BadBlockArgs, error) {
return api.eth.BlockChain().BadBlocks()
}
+
+// StorageRangeResult is the result of a debug_storageRangeAt API call.
+type StorageRangeResult struct {
+ Storage storageMap `json:"storage"`
+ NextKey *common.Hash `json:"nextKey"` // nil if Storage includes the last key in the trie.
+}
+
+type storageMap map[common.Hash]storageEntry
+
+type storageEntry struct {
+ Key *common.Hash `json:"key"`
+ Value common.Hash `json:"value"`
+}
+
+// StorageRangeAt returns the storage at the given block height and transaction index.
+func (api *PrivateDebugAPI) StorageRangeAt(ctx context.Context, blockHash common.Hash, txIndex int, contractAddress common.Address, keyStart hexutil.Bytes, maxResult int) (StorageRangeResult, error) {
+ _, _, statedb, err := api.computeTxEnv(blockHash, txIndex)
+ if err != nil {
+ return StorageRangeResult{}, err
+ }
+ st := statedb.StorageTrie(contractAddress)
+ if st == nil {
+ return StorageRangeResult{}, fmt.Errorf("account %x doesn't exist", contractAddress)
+ }
+ return storageRangeAt(st, keyStart, maxResult), nil
+}
+
+func storageRangeAt(st *trie.SecureTrie, start []byte, maxResult int) StorageRangeResult {
+ it := trie.NewIterator(st.NodeIterator(start))
+ result := StorageRangeResult{Storage: storageMap{}}
+ for i := 0; i < maxResult && it.Next(); i++ {
+ e := storageEntry{Value: common.BytesToHash(it.Value)}
+ if preimage := st.GetKey(it.Key); preimage != nil {
+ preimage := common.BytesToHash(preimage)
+ e.Key = &preimage
+ }
+ result.Storage[common.BytesToHash(it.Key)] = e
+ }
+ // Add the 'next key' so clients can continue downloading.
+ if it.Next() {
+ next := common.BytesToHash(it.Key)
+ result.NextKey = &next
+ }
+ return result
+}