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cmd/evm: add state transition tool for testing (#20958)

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This PR implements the EVM state transition tool, which is intended
to be the replacement for our retesteth client implementation.
Documentation is present in the cmd/evm/README.md file.

Co-authored-by: Felix Lange <fjl@twurst.com>
This commit is contained in:
Martin Holst Swende 2020-06-30 10:12:51 +02:00 committed by GitHub
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268
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## EVM state transition tool
The `evm t8n` tool is a stateless state transition utility. It is a utility
which can
1. Take a prestate, including
- Accounts,
- Block context information,
- Previous blockshashes (*optional)
2. Apply a set of transactions,
3. Apply a mining-reward (*optional),
4. And generate a post-state, including
- State root, transaction root, receipt root,
- Information about rejected transactions,
- Optionally: a full or partial post-state dump
## Specification
The idea is to specify the behaviour of this binary very _strict_, so that other
node implementors can build replicas based on their own state-machines, and the
state generators can swap between a `geth`-based implementation and a `parityvm`-based
implementation.
### Command line params
Command line params that has to be supported are
```
--trace Output full trace logs to files <txhash>.jsonl
--trace.nomemory Disable full memory dump in traces
--trace.nostack Disable stack output in traces
--output.alloc alloc Determines where to put the alloc of the post-state.
`stdout` - into the stdout output
`stderr` - into the stderr output
--output.result result Determines where to put the result (stateroot, txroot etc) of the post-state.
`stdout` - into the stdout output
`stderr` - into the stderr output
--state.fork value Name of ruleset to use.
--state.chainid value ChainID to use (default: 1)
--state.reward value Mining reward. Set to -1 to disable (default: 0)
```
### Error codes and output
All logging should happen against the `stderr`.
There are a few (not many) errors that can occur, those are defined below.
#### EVM-based errors (`2` to `9`)
- Other EVM error. Exit code `2`
- Failed configuration: when a non-supported or invalid fork was specified. Exit code `3`.
- Block history is not supplied, but needed for a `BLOCKHASH` operation. If `BLOCKHASH`
is invoked targeting a block which history has not been provided for, the program will
exit with code `4`.
#### IO errors (`10`-`20`)
- Invalid input json: the supplied data could not be marshalled.
The program will exit with code `10`
- IO problems: failure to load or save files, the program will exit with code `11`
## Examples
### Basic usage
Invoking it with the provided example files
```
./evm t8n --input.alloc=./testdata/1/alloc.json --input.txs=./testdata/1/txs.json --input.env=./testdata/1/env.json
```
Two resulting files:
`alloc.json`:
```json
{
"0x8a8eafb1cf62bfbeb1741769dae1a9dd47996192": {
"balance": "0xfeed1a9d",
"nonce": "0x1"
},
"0xa94f5374fce5edbc8e2a8697c15331677e6ebf0b": {
"balance": "0x5ffd4878be161d74",
"nonce": "0xac"
},
"0xc94f5374fce5edbc8e2a8697c15331677e6ebf0b": {
"balance": "0xa410"
}
}
```
`result.json`:
```json
{
"stateRoot": "0x84208a19bc2b46ada7445180c1db162be5b39b9abc8c0a54b05d32943eae4e13",
"txRoot": "0xc4761fd7b87ff2364c7c60b6c5c8d02e522e815328aaea3f20e3b7b7ef52c42d",
"receiptRoot": "0x056b23fbba480696b65fe5a59b8f2148a1299103c4f57df839233af2cf4ca2d2",
"logsHash": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
"logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
"receipts": [
{
"root": "0x",
"status": "0x1",
"cumulativeGasUsed": "0x5208",
"logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
"logs": null,
"transactionHash": "0x0557bacce3375c98d806609b8d5043072f0b6a8bae45ae5a67a00d3a1a18d673",
"contractAddress": "0x0000000000000000000000000000000000000000",
"gasUsed": "0x5208",
"blockHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
"transactionIndex": "0x0"
}
],
"rejected": [
1
]
}
```
We can make them spit out the data to e.g. `stdout` like this:
```
./evm t8n --input.alloc=./testdata/1/alloc.json --input.txs=./testdata/1/txs.json --input.env=./testdata/1/env.json --output.result=stdout --output.alloc=stdout
```
Output:
```json
{
"alloc": {
"0x8a8eafb1cf62bfbeb1741769dae1a9dd47996192": {
"balance": "0xfeed1a9d",
"nonce": "0x1"
},
"0xa94f5374fce5edbc8e2a8697c15331677e6ebf0b": {
"balance": "0x5ffd4878be161d74",
"nonce": "0xac"
},
"0xc94f5374fce5edbc8e2a8697c15331677e6ebf0b": {
"balance": "0xa410"
}
},
"result": {
"stateRoot": "0x84208a19bc2b46ada7445180c1db162be5b39b9abc8c0a54b05d32943eae4e13",
"txRoot": "0xc4761fd7b87ff2364c7c60b6c5c8d02e522e815328aaea3f20e3b7b7ef52c42d",
"receiptRoot": "0x056b23fbba480696b65fe5a59b8f2148a1299103c4f57df839233af2cf4ca2d2",
"logsHash": "0x1dcc4de8dec75d7aab85b567b6ccd41ad312451b948a7413f0a142fd40d49347",
"logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
"receipts": [
{
"root": "0x",
"status": "0x1",
"cumulativeGasUsed": "0x5208",
"logsBloom": "0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
"logs": null,
"transactionHash": "0x0557bacce3375c98d806609b8d5043072f0b6a8bae45ae5a67a00d3a1a18d673",
"contractAddress": "0x0000000000000000000000000000000000000000",
"gasUsed": "0x5208",
"blockHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
"transactionIndex": "0x0"
}
],
"rejected": [
1
]
}
}
```
## About Ommers
Mining rewards and ommer rewards might need to be added. This is how those are applied:
- `block_reward` is the block mining reward for the miner (`0xaa`), of a block at height `N`.
- For each ommer (mined by `0xbb`), with blocknumber `N-delta`
- (where `delta` is the difference between the current block and the ommer)
- The account `0xbb` (ommer miner) is awarded `(8-delta)/ 8 * block_reward`
- The account `0xaa` (block miner) is awarded `block_reward / 32`
To make `state_t8n` apply these, the following inputs are required:
- `state.reward`
- For ethash, it is `5000000000000000000` `wei`,
- If this is not defined, mining rewards are not applied,
- A value of `0` is valid, and causes accounts to be 'touched'.
- For each ommer, the tool needs to be given an `address` and a `delta`. This
is done via the `env`.
Note: the tool does not verify that e.g. the normal uncle rules apply,
and allows e.g two uncles at the same height, or the uncle-distance. This means that
the tool allows for negative uncle reward (distance > 8)
Example:
`./testdata/5/env.json`:
```json
{
"currentCoinbase": "0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
"currentDifficulty": "0x20000",
"currentGasLimit": "0x750a163df65e8a",
"currentNumber": "1",
"currentTimestamp": "1000",
"ommers": [
{"delta": 1, "address": "0xbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb" },
{"delta": 2, "address": "0xcccccccccccccccccccccccccccccccccccccccc" }
]
}
```
When applying this, using a reward of `0x08`
Output:
```json
{
"alloc": {
"0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa": {
"balance": "0x88"
},
"0xbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb": {
"balance": "0x70"
},
"0xcccccccccccccccccccccccccccccccccccccccc": {
"balance": "0x60"
}
}
}
```
### Future EIPS
It is also possible to experiment with future eips that are not yet defined in a hard fork.
Example, putting EIP-1344 into Frontier:
```
./evm t8n --state.fork=Frontier+1344 --input.pre=./testdata/1/pre.json --input.txs=./testdata/1/txs.json --input.env=/testdata/1/env.json
```
### Block history
The `BLOCKHASH` opcode requires blockhashes to be provided by the caller, inside the `env`.
If a required blockhash is not provided, the exit code should be `4`:
Example where blockhashes are provided:
```
./evm t8n --input.alloc=./testdata/3/alloc.json --input.txs=./testdata/3/txs.json --input.env=./testdata/3/env.json --trace
```
```
cat trace-0.jsonl | grep BLOCKHASH -C2
```
```
{"pc":0,"op":96,"gas":"0x5f58ef8","gasCost":"0x3","memory":"0x","memSize":0,"stack":[],"returnStack":[],"depth":1,"refund":0,"opName":"PUSH1","error":""}
{"pc":2,"op":64,"gas":"0x5f58ef5","gasCost":"0x14","memory":"0x","memSize":0,"stack":["0x1"],"returnStack":[],"depth":1,"refund":0,"opName":"BLOCKHASH","error":""}
{"pc":3,"op":0,"gas":"0x5f58ee1","gasCost":"0x0","memory":"0x","memSize":0,"stack":["0xdac58aa524e50956d0c0bae7f3f8bb9d35381365d07804dd5b48a5a297c06af4"],"returnStack":[],"depth":1,"refund":0,"opName":"STOP","error":""}
{"output":"","gasUsed":"0x17","time":155861}
```
In this example, the caller has not provided the required blockhash:
```
./evm t8n --input.alloc=./testdata/4/alloc.json --input.txs=./testdata/4/txs.json --input.env=./testdata/4/env.json --trace
```
```
ERROR(4): getHash(3) invoked, blockhash for that block not provided
```
Error code: 4
### Chaining
Another thing that can be done, is to chain invocations:
```
./evm t8n --input.alloc=./testdata/1/alloc.json --input.txs=./testdata/1/txs.json --input.env=./testdata/1/env.json --output.alloc=stdout | ./evm t8n --input.alloc=stdin --input.env=./testdata/1/env.json --input.txs=./testdata/1/txs.json
INFO [06-29|11:52:04.934] rejected tx index=1 hash="0557ba…18d673" from=0x8A8eAFb1cf62BfBeb1741769DAE1a9dd47996192 error="nonce too low"
INFO [06-29|11:52:04.936] rejected tx index=0 hash="0557ba…18d673" from=0x8A8eAFb1cf62BfBeb1741769DAE1a9dd47996192 error="nonce too low"
INFO [06-29|11:52:04.936] rejected tx index=1 hash="0557ba…18d673" from=0x8A8eAFb1cf62BfBeb1741769DAE1a9dd47996192 error="nonce too low"
```
What happened here, is that we first applied two identical transactions, so the second one was rejected.
Then, taking the poststate alloc as the input for the next state, we tried again to include
the same two transactions: this time, both failed due to too low nonce.
In order to meaningfully chain invocations, one would need to provide meaningful new `env`, otherwise the
actual blocknumber (exposed to the EVM) would not increase.

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// Copyright 2020 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package t8ntool
import (
"fmt"
"math/big"
"os"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/math"
"github.com/ethereum/go-ethereum/consensus/misc"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/rawdb"
"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/rlp"
"golang.org/x/crypto/sha3"
)
type Prestate struct {
Env stEnv `json:"env"`
Pre core.GenesisAlloc `json:"pre"`
}
// ExecutionResult contains the execution status after running a state test, any
// error that might have occurred and a dump of the final state if requested.
type ExecutionResult struct {
StateRoot common.Hash `json:"stateRoot"`
TxRoot common.Hash `json:"txRoot"`
ReceiptRoot common.Hash `json:"receiptRoot"`
LogsHash common.Hash `json:"logsHash"`
Bloom types.Bloom `json:"logsBloom" gencodec:"required"`
Receipts types.Receipts `json:"receipts"`
Rejected []int `json:"rejected,omitempty"`
}
type ommer struct {
Delta uint64 `json:"delta"`
Address common.Address `json:"address"`
}
//go:generate gencodec -type stEnv -field-override stEnvMarshaling -out gen_stenv.go
type stEnv struct {
Coinbase common.Address `json:"currentCoinbase" gencodec:"required"`
Difficulty *big.Int `json:"currentDifficulty" gencodec:"required"`
GasLimit uint64 `json:"currentGasLimit" gencodec:"required"`
Number uint64 `json:"currentNumber" gencodec:"required"`
Timestamp uint64 `json:"currentTimestamp" gencodec:"required"`
BlockHashes map[math.HexOrDecimal64]common.Hash `json:"blockHashes,omitempty"`
Ommers []ommer `json:"ommers,omitempty"`
}
type stEnvMarshaling struct {
Coinbase common.UnprefixedAddress
Difficulty *math.HexOrDecimal256
GasLimit math.HexOrDecimal64
Number math.HexOrDecimal64
Timestamp math.HexOrDecimal64
}
// Apply applies a set of transactions to a pre-state
func (pre *Prestate) Apply(vmConfig vm.Config, chainConfig *params.ChainConfig,
txs types.Transactions, miningReward int64,
getTracerFn func(txIndex int) (tracer vm.Tracer, err error)) (*state.StateDB, *ExecutionResult, error) {
// Capture errors for BLOCKHASH operation, if we haven't been supplied the
// required blockhashes
var hashError error
getHash := func(num uint64) common.Hash {
if pre.Env.BlockHashes == nil {
hashError = fmt.Errorf("getHash(%d) invoked, no blockhashes provided", num)
return common.Hash{}
}
h, ok := pre.Env.BlockHashes[math.HexOrDecimal64(num)]
if !ok {
hashError = fmt.Errorf("getHash(%d) invoked, blockhash for that block not provided", num)
}
return h
}
var (
statedb = MakePreState(rawdb.NewMemoryDatabase(), pre.Pre)
signer = types.MakeSigner(chainConfig, new(big.Int).SetUint64(pre.Env.Number))
gaspool = new(core.GasPool)
blockHash = common.Hash{0x13, 0x37}
rejectedTxs []int
includedTxs types.Transactions
gasUsed = uint64(0)
receipts = make(types.Receipts, 0)
txIndex = 0
)
gaspool.AddGas(pre.Env.GasLimit)
vmContext := vm.Context{
CanTransfer: core.CanTransfer,
Transfer: core.Transfer,
Coinbase: pre.Env.Coinbase,
BlockNumber: new(big.Int).SetUint64(pre.Env.Number),
Time: new(big.Int).SetUint64(pre.Env.Timestamp),
Difficulty: pre.Env.Difficulty,
GasLimit: pre.Env.GasLimit,
GetHash: getHash,
// GasPrice and Origin needs to be set per transaction
}
// If DAO is supported/enabled, we need to handle it here. In geth 'proper', it's
// done in StateProcessor.Process(block, ...), right before transactions are applied.
if chainConfig.DAOForkSupport &&
chainConfig.DAOForkBlock != nil &&
chainConfig.DAOForkBlock.Cmp(new(big.Int).SetUint64(pre.Env.Number)) == 0 {
misc.ApplyDAOHardFork(statedb)
}
for i, tx := range txs {
msg, err := tx.AsMessage(signer)
if err != nil {
log.Info("rejected tx", "index", i, "hash", tx.Hash(), "error", err)
rejectedTxs = append(rejectedTxs, i)
continue
}
tracer, err := getTracerFn(txIndex)
if err != nil {
return nil, nil, err
}
vmConfig.Tracer = tracer
vmConfig.Debug = (tracer != nil)
statedb.Prepare(tx.Hash(), blockHash, txIndex)
vmContext.GasPrice = msg.GasPrice()
vmContext.Origin = msg.From()
evm := vm.NewEVM(vmContext, statedb, chainConfig, vmConfig)
snapshot := statedb.Snapshot()
// (ret []byte, usedGas uint64, failed bool, err error)
msgResult, err := core.ApplyMessage(evm, msg, gaspool)
if err != nil {
statedb.RevertToSnapshot(snapshot)
log.Info("rejected tx", "index", i, "hash", tx.Hash(), "from", msg.From(), "error", err)
rejectedTxs = append(rejectedTxs, i)
continue
}
includedTxs = append(includedTxs, tx)
if hashError != nil {
return nil, nil, NewError(ErrorMissingBlockhash, hashError)
}
gasUsed += msgResult.UsedGas
// Create a new receipt for the transaction, storing the intermediate root and gas used by the tx
{
var root []byte
if chainConfig.IsByzantium(vmContext.BlockNumber) {
statedb.Finalise(true)
} else {
root = statedb.IntermediateRoot(chainConfig.IsEIP158(vmContext.BlockNumber)).Bytes()
}
receipt := types.NewReceipt(root, msgResult.Failed(), gasUsed)
receipt.TxHash = tx.Hash()
receipt.GasUsed = msgResult.UsedGas
// if the transaction created a contract, store the creation address in the receipt.
if msg.To() == nil {
receipt.ContractAddress = crypto.CreateAddress(evm.Context.Origin, tx.Nonce())
}
// Set the receipt logs and create a bloom for filtering
receipt.Logs = statedb.GetLogs(tx.Hash())
receipt.Bloom = types.CreateBloom(types.Receipts{receipt})
// These three are non-consensus fields
//receipt.BlockHash
//receipt.BlockNumber =
receipt.TransactionIndex = uint(txIndex)
receipts = append(receipts, receipt)
}
txIndex++
}
statedb.IntermediateRoot(chainConfig.IsEIP158(vmContext.BlockNumber))
// Add mining reward?
if miningReward > 0 {
// Add mining reward. The mining reward may be `0`, which only makes a difference in the cases
// where
// - the coinbase suicided, or
// - there are only 'bad' transactions, which aren't executed. In those cases,
// the coinbase gets no txfee, so isn't created, and thus needs to be touched
var (
blockReward = big.NewInt(miningReward)
minerReward = new(big.Int).Set(blockReward)
perOmmer = new(big.Int).Div(blockReward, big.NewInt(32))
)
for _, ommer := range pre.Env.Ommers {
// Add 1/32th for each ommer included
minerReward.Add(minerReward, perOmmer)
// Add (8-delta)/8
reward := big.NewInt(8)
reward.Sub(reward, big.NewInt(0).SetUint64(ommer.Delta))
reward.Mul(reward, blockReward)
reward.Div(reward, big.NewInt(8))
statedb.AddBalance(ommer.Address, reward)
}
statedb.AddBalance(pre.Env.Coinbase, minerReward)
}
// Commit block
root, err := statedb.Commit(chainConfig.IsEIP158(vmContext.BlockNumber))
if err != nil {
fmt.Fprintf(os.Stderr, "Could not commit state: %v", err)
return nil, nil, NewError(ErrorEVM, fmt.Errorf("could not commit state: %v", err))
}
execRs := &ExecutionResult{
StateRoot: root,
TxRoot: types.DeriveSha(includedTxs),
ReceiptRoot: types.DeriveSha(receipts),
Bloom: types.CreateBloom(receipts),
LogsHash: rlpHash(statedb.Logs()),
Receipts: receipts,
Rejected: rejectedTxs,
}
return statedb, execRs, nil
}
func MakePreState(db ethdb.Database, accounts core.GenesisAlloc) *state.StateDB {
sdb := state.NewDatabase(db)
statedb, _ := state.New(common.Hash{}, sdb, nil)
for addr, a := range accounts {
statedb.SetCode(addr, a.Code)
statedb.SetNonce(addr, a.Nonce)
statedb.SetBalance(addr, a.Balance)
for k, v := range a.Storage {
statedb.SetState(addr, k, v)
}
}
// Commit and re-open to start with a clean state.
root, _ := statedb.Commit(false)
statedb, _ = state.New(root, sdb, nil)
return statedb
}
func rlpHash(x interface{}) (h common.Hash) {
hw := sha3.NewLegacyKeccak256()
rlp.Encode(hw, x)
hw.Sum(h[:0])
return h
}

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// Copyright 2020 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package t8ntool
import (
"fmt"
"strings"
"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/tests"
"gopkg.in/urfave/cli.v1"
)
var (
TraceFlag = cli.BoolFlag{
Name: "trace",
Usage: "Output full trace logs to files <txhash>.jsonl",
}
TraceDisableMemoryFlag = cli.BoolFlag{
Name: "trace.nomemory",
Usage: "Disable full memory dump in traces",
}
TraceDisableStackFlag = cli.BoolFlag{
Name: "trace.nostack",
Usage: "Disable stack output in traces",
}
OutputAllocFlag = cli.StringFlag{
Name: "output.alloc",
Usage: "Determines where to put the `alloc` of the post-state.\n" +
"\t`stdout` - into the stdout output\n" +
"\t`stderr` - into the stderr output\n" +
"\t<file> - into the file <file> ",
Value: "alloc.json",
}
OutputResultFlag = cli.StringFlag{
Name: "output.result",
Usage: "Determines where to put the `result` (stateroot, txroot etc) of the post-state.\n" +
"\t`stdout` - into the stdout output\n" +
"\t`stderr` - into the stderr output\n" +
"\t<file> - into the file <file> ",
Value: "result.json",
}
InputAllocFlag = cli.StringFlag{
Name: "input.alloc",
Usage: "`stdin` or file name of where to find the prestate alloc to use.",
Value: "alloc.json",
}
InputEnvFlag = cli.StringFlag{
Name: "input.env",
Usage: "`stdin` or file name of where to find the prestate env to use.",
Value: "env.json",
}
InputTxsFlag = cli.StringFlag{
Name: "input.txs",
Usage: "`stdin` or file name of where to find the transactions to apply.",
Value: "txs.json",
}
RewardFlag = cli.Int64Flag{
Name: "state.reward",
Usage: "Mining reward. Set to -1 to disable",
Value: 0,
}
ChainIDFlag = cli.Int64Flag{
Name: "state.chainid",
Usage: "ChainID to use",
Value: 1,
}
ForknameFlag = cli.StringFlag{
Name: "state.fork",
Usage: fmt.Sprintf("Name of ruleset to use."+
"\n\tAvailable forknames:"+
"\n\t %v"+
"\n\tAvailable extra eips:"+
"\n\t %v"+
"\n\tSyntax <forkname>(+ExtraEip)",
strings.Join(tests.AvailableForks(), "\n\t "),
strings.Join(vm.ActivateableEips(), ", ")),
Value: "Istanbul",
}
VerbosityFlag = cli.IntFlag{
Name: "verbosity",
Usage: "sets the verbosity level",
Value: 3,
}
)

80
cmd/evm/internal/t8ntool/gen_stenv.go Normal file
View File

@ -0,0 +1,80 @@
// Code generated by github.com/fjl/gencodec. DO NOT EDIT.
package t8ntool
import (
"encoding/json"
"errors"
"math/big"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/math"
)
var _ = (*stEnvMarshaling)(nil)
// MarshalJSON marshals as JSON.
func (s stEnv) MarshalJSON() ([]byte, error) {
type stEnv struct {
Coinbase common.UnprefixedAddress `json:"currentCoinbase" gencodec:"required"`
Difficulty *math.HexOrDecimal256 `json:"currentDifficulty" gencodec:"required"`
GasLimit math.HexOrDecimal64 `json:"currentGasLimit" gencodec:"required"`
Number math.HexOrDecimal64 `json:"currentNumber" gencodec:"required"`
Timestamp math.HexOrDecimal64 `json:"currentTimestamp" gencodec:"required"`
BlockHashes map[math.HexOrDecimal64]common.Hash `json:"blockHashes,omitempty"`
Ommers []ommer `json:"ommers,omitempty"`
}
var enc stEnv
enc.Coinbase = common.UnprefixedAddress(s.Coinbase)
enc.Difficulty = (*math.HexOrDecimal256)(s.Difficulty)
enc.GasLimit = math.HexOrDecimal64(s.GasLimit)
enc.Number = math.HexOrDecimal64(s.Number)
enc.Timestamp = math.HexOrDecimal64(s.Timestamp)
enc.BlockHashes = s.BlockHashes
enc.Ommers = s.Ommers
return json.Marshal(&enc)
}
// UnmarshalJSON unmarshals from JSON.
func (s *stEnv) UnmarshalJSON(input []byte) error {
type stEnv struct {
Coinbase *common.UnprefixedAddress `json:"currentCoinbase" gencodec:"required"`
Difficulty *math.HexOrDecimal256 `json:"currentDifficulty" gencodec:"required"`
GasLimit *math.HexOrDecimal64 `json:"currentGasLimit" gencodec:"required"`
Number *math.HexOrDecimal64 `json:"currentNumber" gencodec:"required"`
Timestamp *math.HexOrDecimal64 `json:"currentTimestamp" gencodec:"required"`
BlockHashes map[math.HexOrDecimal64]common.Hash `json:"blockHashes,omitempty"`
Ommers []ommer `json:"ommers,omitempty"`
}
var dec stEnv
if err := json.Unmarshal(input, &dec); err != nil {
return err
}
if dec.Coinbase == nil {
return errors.New("missing required field 'currentCoinbase' for stEnv")
}
s.Coinbase = common.Address(*dec.Coinbase)
if dec.Difficulty == nil {
return errors.New("missing required field 'currentDifficulty' for stEnv")
}
s.Difficulty = (*big.Int)(dec.Difficulty)
if dec.GasLimit == nil {
return errors.New("missing required field 'currentGasLimit' for stEnv")
}
s.GasLimit = uint64(*dec.GasLimit)
if dec.Number == nil {
return errors.New("missing required field 'currentNumber' for stEnv")
}
s.Number = uint64(*dec.Number)
if dec.Timestamp == nil {
return errors.New("missing required field 'currentTimestamp' for stEnv")
}
s.Timestamp = uint64(*dec.Timestamp)
if dec.BlockHashes != nil {
s.BlockHashes = dec.BlockHashes
}
if dec.Ommers != nil {
s.Ommers = dec.Ommers
}
return nil
}

276
cmd/evm/internal/t8ntool/transition.go Normal file
View File

@ -0,0 +1,276 @@
// Copyright 2020 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// go-ethereum is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
package t8ntool
import (
"encoding/json"
"fmt"
"io/ioutil"
"math/big"
"os"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core"
"github.com/ethereum/go-ethereum/core/state"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/core/vm"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/params"
"github.com/ethereum/go-ethereum/tests"
"gopkg.in/urfave/cli.v1"
)
const (
ErrorEVM = 2
ErrorVMConfig = 3
ErrorMissingBlockhash = 4
ErrorJson = 10
ErrorIO = 11
stdinSelector = "stdin"
)
type NumberedError struct {
errorCode int
err error
}
func NewError(errorCode int, err error) *NumberedError {
return &NumberedError{errorCode, err}
}
func (n *NumberedError) Error() string {
return fmt.Sprintf("ERROR(%d): %v", n.errorCode, n.err.Error())
}
func (n *NumberedError) Code() int {
return n.errorCode
}
type input struct {
Alloc core.GenesisAlloc `json:"alloc,omitempty"`
Env *stEnv `json:"env,omitempty"`
Txs types.Transactions `json:"txs,omitempty"`
}
func Main(ctx *cli.Context) error {
// Configure the go-ethereum logger
glogger := log.NewGlogHandler(log.StreamHandler(os.Stderr, log.TerminalFormat(false)))
glogger.Verbosity(log.Lvl(ctx.Int(VerbosityFlag.Name)))
log.Root().SetHandler(glogger)
var (
err error
tracer vm.Tracer
)
var getTracer func(txIndex int) (vm.Tracer, error)
if ctx.Bool(TraceFlag.Name) {
// Configure the EVM logger
logConfig := &vm.LogConfig{
DisableStack: ctx.Bool(TraceDisableStackFlag.Name),
DisableMemory: ctx.Bool(TraceDisableMemoryFlag.Name),
Debug: true,
}
var prevFile *os.File
// This one closes the last file
defer func() {
if prevFile != nil {
prevFile.Close()
}
}()
getTracer = func(txIndex int) (vm.Tracer, error) {
if prevFile != nil {
prevFile.Close()
}
traceFile, err := os.Create(fmt.Sprintf("trace-%d.jsonl", txIndex))
if err != nil {
return nil, NewError(ErrorIO, fmt.Errorf("failed creating trace-file: %v", err))
}
prevFile = traceFile
return vm.NewJSONLogger(logConfig, traceFile), nil
}
} else {
getTracer = func(txIndex int) (tracer vm.Tracer, err error) {
return nil, nil
}
}
// We need to load three things: alloc, env and transactions. May be either in
// stdin input or in files.
// Check if anything needs to be read from stdin
var (
prestate Prestate
txs types.Transactions // txs to apply
allocStr = ctx.String(InputAllocFlag.Name)
envStr = ctx.String(InputEnvFlag.Name)
txStr = ctx.String(InputTxsFlag.Name)
inputData = &input{}
)
if allocStr == stdinSelector || envStr == stdinSelector || txStr == stdinSelector {
decoder := json.NewDecoder(os.Stdin)
decoder.Decode(inputData)
}
if allocStr != stdinSelector {
inFile, err := os.Open(allocStr)
if err != nil {
return NewError(ErrorIO, fmt.Errorf("failed reading alloc file: %v", err))
}
defer inFile.Close()
decoder := json.NewDecoder(inFile)
if err := decoder.Decode(&inputData.Alloc); err != nil {
return NewError(ErrorJson, fmt.Errorf("Failed unmarshaling alloc-file: %v", err))
}
}
if envStr != stdinSelector {
inFile, err := os.Open(envStr)
if err != nil {
return NewError(ErrorIO, fmt.Errorf("failed reading env file: %v", err))
}
defer inFile.Close()
decoder := json.NewDecoder(inFile)
var env stEnv
if err := decoder.Decode(&env); err != nil {
return NewError(ErrorJson, fmt.Errorf("Failed unmarshaling env-file: %v", err))
}
inputData.Env = &env
}
if txStr != stdinSelector {
inFile, err := os.Open(txStr)
if err != nil {
return NewError(ErrorIO, fmt.Errorf("failed reading txs file: %v", err))
}
defer inFile.Close()
decoder := json.NewDecoder(inFile)
var txs types.Transactions
if err := decoder.Decode(&txs); err != nil {
return NewError(ErrorJson, fmt.Errorf("Failed unmarshaling txs-file: %v", err))
}
inputData.Txs = txs
}
prestate.Pre = inputData.Alloc
prestate.Env = *inputData.Env
txs = inputData.Txs
// Iterate over all the tests, run them and aggregate the results
vmConfig := vm.Config{
Tracer: tracer,
Debug: (tracer != nil),
}
// Construct the chainconfig
var chainConfig *params.ChainConfig
if cConf, extraEips, err := tests.GetChainConfig(ctx.String(ForknameFlag.Name)); err != nil {
return NewError(ErrorVMConfig, fmt.Errorf("Failed constructing chain configuration: %v", err))
} else {
chainConfig = cConf
vmConfig.ExtraEips = extraEips
}
// Set the chain id
chainConfig.ChainID = big.NewInt(ctx.Int64(ChainIDFlag.Name))
// Run the test and aggregate the result
state, result, err := prestate.Apply(vmConfig, chainConfig, txs, ctx.Int64(RewardFlag.Name), getTracer)
if err != nil {
return err
}
// Dump the excution result
//postAlloc := state.DumpGenesisFormat(false, false, false)
collector := make(Alloc)
state.DumpToCollector(collector, false, false, false, nil, -1)
return dispatchOutput(ctx, result, collector)
}
type Alloc map[common.Address]core.GenesisAccount
func (g Alloc) OnRoot(common.Hash) {}
func (g Alloc) OnAccount(addr common.Address, dumpAccount state.DumpAccount) {
balance, _ := new(big.Int).SetString(dumpAccount.Balance, 10)
var storage map[common.Hash]common.Hash
if dumpAccount.Storage != nil {
storage = make(map[common.Hash]common.Hash)
for k, v := range dumpAccount.Storage {
storage[k] = common.HexToHash(v)
}
}
genesisAccount := core.GenesisAccount{
Code: common.FromHex(dumpAccount.Code),
Storage: storage,
Balance: balance,
Nonce: dumpAccount.Nonce,
}
g[addr] = genesisAccount
}
// saveFile marshalls the object to the given file
func saveFile(filename string, data interface{}) error {
b, err := json.MarshalIndent(data, "", " ")
if err != nil {
return NewError(ErrorJson, fmt.Errorf("failed marshalling output: %v", err))
}
if err = ioutil.WriteFile(filename, b, 0644); err != nil {
return NewError(ErrorIO, fmt.Errorf("failed writing output: %v", err))
}
return nil
}
// dispatchOutput writes the output data to either stderr or stdout, or to the specified
// files
func dispatchOutput(ctx *cli.Context, result *ExecutionResult, alloc Alloc) error {
stdOutObject := make(map[string]interface{})
stdErrObject := make(map[string]interface{})
dispatch := func(fName, name string, obj interface{}) error {
switch fName {
case "stdout":
stdOutObject[name] = obj
case "stderr":
stdErrObject[name] = obj
default: // save to file
if err := saveFile(fName, obj); err != nil {
return err
}
}
return nil
}
if err := dispatch(ctx.String(OutputAllocFlag.Name), "alloc", alloc); err != nil {
return err
}
if err := dispatch(ctx.String(OutputResultFlag.Name), "result", result); err != nil {
return err
}
if len(stdOutObject) > 0 {
b, err := json.MarshalIndent(stdOutObject, "", " ")
if err != nil {
return NewError(ErrorJson, fmt.Errorf("failed marshalling output: %v", err))
}
os.Stdout.Write(b)
}
if len(stdErrObject) > 0 {
b, err := json.MarshalIndent(stdErrObject, "", " ")
if err != nil {
return NewError(ErrorJson, fmt.Errorf("failed marshalling output: %v", err))
}
os.Stderr.Write(b)
}
return nil
}

29
cmd/evm/main.go
View File

@ -22,6 +22,7 @@ import (
"math/big" "math/big"
"os" "os"
"github.com/ethereum/go-ethereum/cmd/evm/internal/t8ntool"
"github.com/ethereum/go-ethereum/cmd/utils" "github.com/ethereum/go-ethereum/cmd/utils"
"gopkg.in/urfave/cli.v1" "gopkg.in/urfave/cli.v1"
) )
@ -126,6 +127,27 @@ var (
} }
) )
var stateTransitionCommand = cli.Command{
Name: "transition",
Aliases: []string{"t8n"},
Usage: "executes a full state transition",
Action: t8ntool.Main,
Flags: []cli.Flag{
t8ntool.TraceFlag,
t8ntool.TraceDisableMemoryFlag,
t8ntool.TraceDisableStackFlag,
t8ntool.OutputAllocFlag,
t8ntool.OutputResultFlag,
t8ntool.InputAllocFlag,
t8ntool.InputEnvFlag,
t8ntool.InputTxsFlag,
t8ntool.ForknameFlag,
t8ntool.ChainIDFlag,
t8ntool.RewardFlag,
t8ntool.VerbosityFlag,
},
}
func init() { func init() {
app.Flags = []cli.Flag{ app.Flags = []cli.Flag{
BenchFlag, BenchFlag,
@ -156,13 +178,18 @@ func init() {
disasmCommand, disasmCommand,
runCommand, runCommand,
stateTestCommand, stateTestCommand,
stateTransitionCommand,
} }
cli.CommandHelpTemplate = utils.OriginCommandHelpTemplate cli.CommandHelpTemplate = utils.OriginCommandHelpTemplate
} }
func main() { func main() {
if err := app.Run(os.Args); err != nil { if err := app.Run(os.Args); err != nil {
code := 1
if ec, ok := err.(*t8ntool.NumberedError); ok {
code = ec.Code()
}
fmt.Fprintln(os.Stderr, err) fmt.Fprintln(os.Stderr, err)
os.Exit(1) os.Exit(code)
} }
} }

23
cmd/evm/poststate.json Normal file
View File

@ -0,0 +1,23 @@
{
"root": "f4157bb27bcb1d1a63001434a249a80948f2e9fe1f53d551244c1dae826b5b23",
"accounts": {
"0x8a8eafb1cf62bfbeb1741769dae1a9dd47996192": {
"balance": "4276951709",
"nonce": 1,
"root": "56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
"codeHash": "c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470"
},
"0xa94f5374fce5edbc8e2a8697c15331677e6ebf0b": {
"balance": "6916764286133345652",
"nonce": 172,
"root": "56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
"codeHash": "c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470"
},
"0xc94f5374fce5edbc8e2a8697c15331677e6ebf0b": {
"balance": "42500",
"nonce": 0,
"root": "56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421",
"codeHash": "c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470"
}
}
}

12
cmd/evm/testdata/1/alloc.json vendored Normal file
View File

@ -0,0 +1,12 @@
{
"a94f5374fce5edbc8e2a8697c15331677e6ebf0b": {
"balance": "0x5ffd4878be161d74",
"code": "0x",
"nonce": "0xac",
"storage": {}
},
"0x8a8eafb1cf62bfbeb1741769dae1a9dd47996192":{
"balance": "0xfeedbead",
"nonce" : "0x00"
}
}

7
cmd/evm/testdata/1/env.json vendored Normal file
View File

@ -0,0 +1,7 @@
{
"currentCoinbase": "0xc94f5374fce5edbc8e2a8697c15331677e6ebf0b",
"currentDifficulty": "0x20000",
"currentGasLimit": "0x750a163df65e8a",
"currentNumber": "1",
"currentTimestamp": "1000"
}

26
cmd/evm/testdata/1/txs.json vendored Normal file
View File

@ -0,0 +1,26 @@
[
{
"gas": "0x5208",
"gasPrice": "0x2",
"hash": "0x0557bacce3375c98d806609b8d5043072f0b6a8bae45ae5a67a00d3a1a18d673",
"input": "0x",
"nonce": "0x0",
"r": "0x9500e8ba27d3c33ca7764e107410f44cbd8c19794bde214d694683a7aa998cdb",
"s": "0x7235ae07e4bd6e0206d102b1f8979d6adab280466b6a82d2208ee08951f1f600",
"to": "0x8a8eafb1cf62bfbeb1741769dae1a9dd47996192",
"v": "0x1b",
"value": "0x1"
},
{
"gas": "0x5208",
"gasPrice": "0x2",
"hash": "0x0557bacce3375c98d806609b8d5043072f0b6a8bae45ae5a67a00d3a1a18d673",
"input": "0x",
"nonce": "0x0",
"r": "0x9500e8ba27d3c33ca7764e107410f44cbd8c19794bde214d694683a7aa998cdb",
"s": "0x7235ae07e4bd6e0206d102b1f8979d6adab280466b6a82d2208ee08951f1f600",
"to": "0x8a8eafb1cf62bfbeb1741769dae1a9dd47996192",
"v": "0x1b",
"value": "0x1"
}
]

16
cmd/evm/testdata/2/alloc.json vendored Normal file
View File

@ -0,0 +1,16 @@
{
"0x095e7baea6a6c7c4c2dfeb977efac326af552d87" : {
"balance" : "0x0de0b6b3a7640000",
"code" : "0x6001600053600160006001f0ff00",
"nonce" : "0x00",
"storage" : {
}
},
"0xa94f5374fce5edbc8e2a8697c15331677e6ebf0b" : {
"balance" : "0x0de0b6b3a7640000",
"code" : "0x",
"nonce" : "0x00",
"storage" : {
}
}
}

7
cmd/evm/testdata/2/env.json vendored Normal file
View File

@ -0,0 +1,7 @@
{
"currentCoinbase" : "0x2adc25665018aa1fe0e6bc666dac8fc2697ff9ba",
"currentDifficulty" : "0x020000",
"currentGasLimit" : "0x3b9aca00",
"currentNumber" : "0x01",
"currentTimestamp" : "0x03e8"
}

1
cmd/evm/testdata/2/readme.md vendored Normal file
View File

@ -0,0 +1 @@
These files examplify a selfdestruct to the `0`-address.

14
cmd/evm/testdata/2/txs.json vendored Normal file
View File

@ -0,0 +1,14 @@
[
{
"input" : "0x",
"gas" : "0x5f5e100",
"gasPrice" : "0x1",
"nonce" : "0x0",
"to" : "0x095e7baea6a6c7c4c2dfeb977efac326af552d87",
"value" : "0x186a0",
"v" : "0x1b",
"r" : "0x88544c93a564b4c28d2ffac2074a0c55fdd4658fe0d215596ed2e32e3ef7f56b",
"s" : "0x7fb4075d54190f825d7c47bb820284757b34fd6293904a93cddb1d3aa961ac28",
"hash" : "0x72fadbef39cd251a437eea619cfeda752271a5faaaa2147df012e112159ffb81"
}
]

16
cmd/evm/testdata/3/alloc.json vendored Normal file
View File

@ -0,0 +1,16 @@
{
"0x095e7baea6a6c7c4c2dfeb977efac326af552d87" : {
"balance" : "0x0de0b6b3a7640000",
"code" : "0x600140",
"nonce" : "0x00",
"storage" : {
}
},
"0xa94f5374fce5edbc8e2a8697c15331677e6ebf0b" : {
"balance" : "0x0de0b6b3a7640000",
"code" : "0x",
"nonce" : "0x00",
"storage" : {
}
}
}

8
cmd/evm/testdata/3/env.json vendored Normal file
View File

@ -0,0 +1,8 @@
{
"currentCoinbase" : "0x2adc25665018aa1fe0e6bc666dac8fc2697ff9ba",
"currentDifficulty" : "0x020000",
"currentGasLimit" : "0x3b9aca00",
"currentNumber" : "0x05",
"currentTimestamp" : "0x03e8",
"blockHashes" : { "1" : "0xdac58aa524e50956d0c0bae7f3f8bb9d35381365d07804dd5b48a5a297c06af4"}
}

2
cmd/evm/testdata/3/readme.md vendored Normal file
View File

@ -0,0 +1,2 @@
These files examplify a transition where a transaction (excuted on block 5) requests
the blockhash for block `1`.

14
cmd/evm/testdata/3/txs.json vendored Normal file
View File

@ -0,0 +1,14 @@
[
{
"input" : "0x",
"gas" : "0x5f5e100",
"gasPrice" : "0x1",
"nonce" : "0x0",
"to" : "0x095e7baea6a6c7c4c2dfeb977efac326af552d87",
"value" : "0x186a0",
"v" : "0x1b",
"r" : "0x88544c93a564b4c28d2ffac2074a0c55fdd4658fe0d215596ed2e32e3ef7f56b",
"s" : "0x7fb4075d54190f825d7c47bb820284757b34fd6293904a93cddb1d3aa961ac28",
"hash" : "0x72fadbef39cd251a437eea619cfeda752271a5faaaa2147df012e112159ffb81"
}
]

16
cmd/evm/testdata/4/alloc.json vendored Normal file
View File

@ -0,0 +1,16 @@
{
"0x095e7baea6a6c7c4c2dfeb977efac326af552d87" : {
"balance" : "0x0de0b6b3a7640000",
"code" : "0x600340",
"nonce" : "0x00",
"storage" : {
}
},
"0xa94f5374fce5edbc8e2a8697c15331677e6ebf0b" : {
"balance" : "0x0de0b6b3a7640000",
"code" : "0x",
"nonce" : "0x00",
"storage" : {
}
}
}

8
cmd/evm/testdata/4/env.json vendored Normal file
View File

@ -0,0 +1,8 @@
{
"currentCoinbase" : "0x2adc25665018aa1fe0e6bc666dac8fc2697ff9ba",
"currentDifficulty" : "0x020000",
"currentGasLimit" : "0x3b9aca00",
"currentNumber" : "0x05",
"currentTimestamp" : "0x03e8",
"blockHashes" : { "1" : "0xdac58aa524e50956d0c0bae7f3f8bb9d35381365d07804dd5b48a5a297c06af4"}
}

3
cmd/evm/testdata/4/readme.md vendored Normal file
View File

@ -0,0 +1,3 @@
These files examplify a transition where a transaction (excuted on block 5) requests
the blockhash for block `4`, but where the hash for that block is missing.
It's expected that executing these should cause `exit` with errorcode `4`.

14
cmd/evm/testdata/4/txs.json vendored Normal file
View File

@ -0,0 +1,14 @@
[
{
"input" : "0x",
"gas" : "0x5f5e100",
"gasPrice" : "0x1",
"nonce" : "0x0",
"to" : "0x095e7baea6a6c7c4c2dfeb977efac326af552d87",
"value" : "0x186a0",
"v" : "0x1b",
"r" : "0x88544c93a564b4c28d2ffac2074a0c55fdd4658fe0d215596ed2e32e3ef7f56b",
"s" : "0x7fb4075d54190f825d7c47bb820284757b34fd6293904a93cddb1d3aa961ac28",
"hash" : "0x72fadbef39cd251a437eea619cfeda752271a5faaaa2147df012e112159ffb81"
}
]

1
cmd/evm/testdata/5/alloc.json vendored Normal file
View File

@ -0,0 +1 @@
{}

11
cmd/evm/testdata/5/env.json vendored Normal file
View File

@ -0,0 +1,11 @@
{
"currentCoinbase": "0xaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
"currentDifficulty": "0x20000",
"currentGasLimit": "0x750a163df65e8a",
"currentNumber": "1",
"currentTimestamp": "1000",
"ommers": [
{"delta": 1, "address": "0xbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb" },
{"delta": 2, "address": "0xcccccccccccccccccccccccccccccccccccccccc" }
]
}

1
cmd/evm/testdata/5/readme.md vendored Normal file
View File

@ -0,0 +1 @@
These files examplify a transition where there are no transcations, two ommers, at block `N-1` (delta 1) and `N-2` (delta 2).

1
cmd/evm/testdata/5/txs.json vendored Normal file
View File

@ -0,0 +1 @@
[]

12
cmd/evm/testdata/7/alloc.json vendored Normal file
View File

@ -0,0 +1,12 @@
{
"a94f5374fce5edbc8e2a8697c15331677e6ebf0b": {
"balance": "0x5ffd4878be161d74",
"code": "0x",
"nonce": "0xac",
"storage": {}
},
"0x8a8eafb1cf62bfbeb1741769dae1a9dd47996192":{
"balance": "0xfeedbead",
"nonce" : "0x00"
}
}

7
cmd/evm/testdata/7/env.json vendored Normal file
View File

@ -0,0 +1,7 @@
{
"currentCoinbase": "0xc94f5374fce5edbc8e2a8697c15331677e6ebf0b",
"currentDifficulty": "0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffff020000",
"currentGasLimit": "0x750a163df65e8a",
"currentNumber": "5",
"currentTimestamp": "1000"
}

7
cmd/evm/testdata/7/readme.md vendored Normal file
View File

@ -0,0 +1,7 @@
This is a test for HomesteadToDao, checking if the
DAO-transition works
Example:
```
./statet8n --input.alloc=./testdata/7/alloc.json --input.txs=./testdata/7/txs.json --input.env=./testdata/7/env.json --output.alloc=stdout --state.fork=HomesteadToDaoAt5
```

1
cmd/evm/testdata/7/txs.json vendored Normal file
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@ -0,0 +1 @@
[]

191
cmd/evm/transition-test.sh Normal file
View File

@ -0,0 +1,191 @@
#!/bin/bash
ticks="\`\`\`"
function showjson(){
echo "\`$1\`:"
echo "${ticks}json"
cat $1
echo ""
echo "$ticks"
}
function demo(){
echo "$ticks"
echo "$1"
echo "$ticks"
echo ""
}
function tick(){
echo "$ticks"
}
cat << EOF
## EVM state transition tool
The \`evm t8n\` tool is a stateless state transition utility. It is a utility
which can
1. Take a prestate, including
- Accounts,
- Block context information,
- Previous blockshashes (*optional)
2. Apply a set of transactions,
3. Apply a mining-reward (*optional),
4. And generate a post-state, including
- State root, transaction root, receipt root,
- Information about rejected transactions,
- Optionally: a full or partial post-state dump
## Specification
The idea is to specify the behaviour of this binary very _strict_, so that other
node implementors can build replicas based on their own state-machines, and the
state generators can swap between a \`geth\`-based implementation and a \`parityvm\`-based
implementation.
### Command line params
Command line params that has to be supported are
$(tick)
` ./evm t8n -h | grep "trace\|output\|state\."`
$(tick)
### Error codes and output
All logging should happen against the \`stderr\`.
There are a few (not many) errors that can occur, those are defined below.
#### EVM-based errors (\`2\` to \`9\`)
- Other EVM error. Exit code \`2\`
- Failed configuration: when a non-supported or invalid fork was specified. Exit code \`3\`.
- Block history is not supplied, but needed for a \`BLOCKHASH\` operation. If \`BLOCKHASH\`
is invoked targeting a block which history has not been provided for, the program will
exit with code \`4\`.
#### IO errors (\`10\`-\`20\`)
- Invalid input json: the supplied data could not be marshalled.
The program will exit with code \`10\`
- IO problems: failure to load or save files, the program will exit with code \`11\`
EOF
# This should exit with 3
./evm t8n --input.alloc=./testdata/1/alloc.json --input.txs=./testdata/1/txs.json --input.env=./testdata/1/env.json --state.fork=Frontier+1346 2>/dev/null
if [ $? != 3 ]; then
echo "Failed, exitcode should be 3"
fi
cat << EOF
## Examples
### Basic usage
Invoking it with the provided example files
EOF
cmd="./evm t8n --input.alloc=./testdata/1/alloc.json --input.txs=./testdata/1/txs.json --input.env=./testdata/1/env.json"
tick;echo "$cmd"; tick
$cmd 2>/dev/null
echo "Two resulting files:"
echo ""
showjson alloc.json
showjson result.json
echo ""
echo "We can make them spit out the data to e.g. \`stdout\` like this:"
cmd="./evm t8n --input.alloc=./testdata/1/alloc.json --input.txs=./testdata/1/txs.json --input.env=./testdata/1/env.json --output.result=stdout --output.alloc=stdout"
tick;echo "$cmd"; tick
output=`$cmd 2>/dev/null`
echo "Output:"
echo "${ticks}json"
echo "$output"
echo "$ticks"
cat << EOF
## About Ommers
Mining rewards and ommer rewards might need to be added. This is how those are applied:
- \`block_reward\` is the block mining reward for the miner (\`0xaa\`), of a block at height \`N\`.
- For each ommer (mined by \`0xbb\`), with blocknumber \`N-delta\`
- (where \`delta\` is the difference between the current block and the ommer)
- The account \`0xbb\` (ommer miner) is awarded \`(8-delta)/ 8 * block_reward\`
- The account \`0xaa\` (block miner) is awarded \`block_reward / 32\`
To make \`state_t8n\` apply these, the following inputs are required:
- \`state.reward\`
- For ethash, it is \`5000000000000000000\` \`wei\`,
- If this is not defined, mining rewards are not applied,
- A value of \`0\` is valid, and causes accounts to be 'touched'.
- For each ommer, the tool needs to be given an \`address\` and a \`delta\`. This
is done via the \`env\`.
Note: the tool does not verify that e.g. the normal uncle rules apply,
and allows e.g two uncles at the same height, or the uncle-distance. This means that
the tool allows for negative uncle reward (distance > 8)
Example:
EOF
showjson ./testdata/5/env.json
echo "When applying this, using a reward of \`0x08\`"
cmd="./evm t8n --input.alloc=./testdata/5/alloc.json -input.txs=./testdata/5/txs.json --input.env=./testdata/5/env.json --output.alloc=stdout --state.reward=0x80"
output=`$cmd 2>/dev/null`
echo "Output:"
echo "${ticks}json"
echo "$output"
echo "$ticks"
echo "### Future EIPS"
echo ""
echo "It is also possible to experiment with future eips that are not yet defined in a hard fork."
echo "Example, putting EIP-1344 into Frontier: "
cmd="./evm t8n --state.fork=Frontier+1344 --input.pre=./testdata/1/pre.json --input.txs=./testdata/1/txs.json --input.env=/testdata/1/env.json"
tick;echo "$cmd"; tick
echo ""
echo "### Block history"
echo ""
echo "The \`BLOCKHASH\` opcode requires blockhashes to be provided by the caller, inside the \`env\`."
echo "If a required blockhash is not provided, the exit code should be \`4\`:"
echo "Example where blockhashes are provided: "
cmd="./evm t8n --input.alloc=./testdata/3/alloc.json --input.txs=./testdata/3/txs.json --input.env=./testdata/3/env.json --trace"
tick && echo $cmd && tick
$cmd 2>&1 >/dev/null
cmd="cat trace-0.jsonl | grep BLOCKHASH -C2"
tick && echo $cmd && tick
echo "$ticks"
cat trace-0.jsonl | grep BLOCKHASH -C2
echo "$ticks"
echo ""
echo "In this example, the caller has not provided the required blockhash:"
cmd="./evm t8n --input.alloc=./testdata/4/alloc.json --input.txs=./testdata/4/txs.json --input.env=./testdata/4/env.json --trace"
tick && echo $cmd && tick
tick
$cmd
errc=$?
tick
echo "Error code: $errc"
echo "### Chaining"
echo ""
echo "Another thing that can be done, is to chain invocations:"
cmd1="./evm t8n --input.alloc=./testdata/1/alloc.json --input.txs=./testdata/1/txs.json --input.env=./testdata/1/env.json --output.alloc=stdout"
cmd2="./evm t8n --input.alloc=stdin --input.env=./testdata/1/env.json --input.txs=./testdata/1/txs.json"
echo "$ticks"
echo "$cmd1 | $cmd2"
output=$($cmd1 | $cmd2 )
echo $output
echo "$ticks"
echo "What happened here, is that we first applied two identical transactions, so the second one was rejected. "
echo "Then, taking the poststate alloc as the input for the next state, we tried again to include"
echo "the same two transactions: this time, both failed due to too low nonce."
echo ""
echo "In order to meaningfully chain invocations, one would need to provide meaningful new \`env\`, otherwise the"
echo "actual blocknumber (exposed to the EVM) would not increase."
echo ""

10
cmd/utils/flags.go
View File

@ -71,8 +71,8 @@ var (
{{if .cmd.Description}}{{.cmd.Description}} {{if .cmd.Description}}{{.cmd.Description}}
{{end}}{{if .cmd.Subcommands}} {{end}}{{if .cmd.Subcommands}}
SUBCOMMANDS: SUBCOMMANDS:
{{range .cmd.Subcommands}}{{.Name}}{{with .ShortName}}, {{.}}{{end}}{{ "\t" }}{{.Usage}} {{range .cmd.Subcommands}}{{.Name}}{{with .ShortName}}, {{.}}{{end}}{{ "\t" }}{{.Usage}}
{{end}}{{end}}{{if .categorizedFlags}} {{end}}{{end}}{{if .categorizedFlags}}
{{range $idx, $categorized := .categorizedFlags}}{{$categorized.Name}} OPTIONS: {{range $idx, $categorized := .categorizedFlags}}{{$categorized.Name}} OPTIONS:
{{range $categorized.Flags}}{{"\t"}}{{.}} {{range $categorized.Flags}}{{"\t"}}{{.}}
{{end}} {{end}}
@ -82,10 +82,10 @@ SUBCOMMANDS:
{{if .Description}}{{.Description}} {{if .Description}}{{.Description}}
{{end}}{{if .Subcommands}} {{end}}{{if .Subcommands}}
SUBCOMMANDS: SUBCOMMANDS:
{{range .Subcommands}}{{.Name}}{{with .ShortName}}, {{.}}{{end}}{{ "\t" }}{{.Usage}} {{range .Subcommands}}{{.Name}}{{with .ShortName}}, {{.}}{{end}}{{ "\t" }}{{.Usage}}
{{end}}{{end}}{{if .Flags}} {{end}}{{end}}{{if .Flags}}
OPTIONS: OPTIONS:
{{range $.Flags}}{{"\t"}}{{.}} {{range $.Flags}} {{.}}
{{end}} {{end}}
{{end}}` {{end}}`
) )

63
core/state/dump.go
View File

@ -27,6 +27,14 @@ import (
"github.com/ethereum/go-ethereum/trie" "github.com/ethereum/go-ethereum/trie"
) )
// DumpCollector interface which the state trie calls during iteration
type DumpCollector interface {
// OnRoot is called with the state root
OnRoot(common.Hash)
// OnAccount is called once for each account in the trie
OnAccount(common.Address, DumpAccount)
}
// DumpAccount represents an account in the state. // DumpAccount represents an account in the state.
type DumpAccount struct { type DumpAccount struct {
Balance string `json:"balance"` Balance string `json:"balance"`
@ -46,9 +54,14 @@ type Dump struct {
Accounts map[common.Address]DumpAccount `json:"accounts"` Accounts map[common.Address]DumpAccount `json:"accounts"`
} }
// iterativeDump is a 'collector'-implementation which dump output line-by-line iteratively. // OnRoot implements DumpCollector interface
type iterativeDump struct { func (d *Dump) OnRoot(root common.Hash) {
*json.Encoder d.Root = fmt.Sprintf("%x", root)
}
// OnAccount implements DumpCollector interface
func (d *Dump) OnAccount(addr common.Address, account DumpAccount) {
d.Accounts[addr] = account
} }
// IteratorDump is an implementation for iterating over data. // IteratorDump is an implementation for iterating over data.
@ -58,28 +71,23 @@ type IteratorDump struct {
Next []byte `json:"next,omitempty"` // nil if no more accounts Next []byte `json:"next,omitempty"` // nil if no more accounts
} }
// Collector interface which the state trie calls during iteration // OnRoot implements DumpCollector interface
type collector interface { func (d *IteratorDump) OnRoot(root common.Hash) {
onRoot(common.Hash)
onAccount(common.Address, DumpAccount)
}
func (d *Dump) onRoot(root common.Hash) {
d.Root = fmt.Sprintf("%x", root) d.Root = fmt.Sprintf("%x", root)
} }
func (d *Dump) onAccount(addr common.Address, account DumpAccount) { // OnAccount implements DumpCollector interface
d.Accounts[addr] = account func (d *IteratorDump) OnAccount(addr common.Address, account DumpAccount) {
}
func (d *IteratorDump) onRoot(root common.Hash) {
d.Root = fmt.Sprintf("%x", root)
}
func (d *IteratorDump) onAccount(addr common.Address, account DumpAccount) {
d.Accounts[addr] = account d.Accounts[addr] = account
} }
func (d iterativeDump) onAccount(addr common.Address, account DumpAccount) { // iterativeDump is a DumpCollector-implementation which dumps output line-by-line iteratively.
type iterativeDump struct {
*json.Encoder
}
// OnAccount implements DumpCollector interface
func (d iterativeDump) OnAccount(addr common.Address, account DumpAccount) {
dumpAccount := &DumpAccount{ dumpAccount := &DumpAccount{
Balance: account.Balance, Balance: account.Balance,
Nonce: account.Nonce, Nonce: account.Nonce,
@ -96,15 +104,16 @@ func (d iterativeDump) onAccount(addr common.Address, account DumpAccount) {
d.Encode(dumpAccount) d.Encode(dumpAccount)
} }
func (d iterativeDump) onRoot(root common.Hash) { // OnRoot implements DumpCollector interface
func (d iterativeDump) OnRoot(root common.Hash) {
d.Encode(struct { d.Encode(struct {
Root common.Hash `json:"root"` Root common.Hash `json:"root"`
}{root}) }{root})
} }
func (s *StateDB) dump(c collector, excludeCode, excludeStorage, excludeMissingPreimages bool, start []byte, maxResults int) (nextKey []byte) { func (s *StateDB) DumpToCollector(c DumpCollector, excludeCode, excludeStorage, excludeMissingPreimages bool, start []byte, maxResults int) (nextKey []byte) {
missingPreimages := 0 missingPreimages := 0
c.onRoot(s.trie.Hash()) c.OnRoot(s.trie.Hash())
var count int var count int
it := trie.NewIterator(s.trie.NodeIterator(start)) it := trie.NewIterator(s.trie.NodeIterator(start))
@ -145,7 +154,7 @@ func (s *StateDB) dump(c collector, excludeCode, excludeStorage, excludeMissingP
account.Storage[common.BytesToHash(s.trie.GetKey(storageIt.Key))] = common.Bytes2Hex(content) account.Storage[common.BytesToHash(s.trie.GetKey(storageIt.Key))] = common.Bytes2Hex(content)
} }
} }
c.onAccount(addr, account) c.OnAccount(addr, account)
count++ count++
if maxResults > 0 && count >= maxResults { if maxResults > 0 && count >= maxResults {
if it.Next() { if it.Next() {
@ -166,7 +175,7 @@ func (s *StateDB) RawDump(excludeCode, excludeStorage, excludeMissingPreimages b
dump := &Dump{ dump := &Dump{
Accounts: make(map[common.Address]DumpAccount), Accounts: make(map[common.Address]DumpAccount),
} }
s.dump(dump, excludeCode, excludeStorage, excludeMissingPreimages, nil, 0) s.DumpToCollector(dump, excludeCode, excludeStorage, excludeMissingPreimages, nil, 0)
return *dump return *dump
} }
@ -175,14 +184,14 @@ func (s *StateDB) Dump(excludeCode, excludeStorage, excludeMissingPreimages bool
dump := s.RawDump(excludeCode, excludeStorage, excludeMissingPreimages) dump := s.RawDump(excludeCode, excludeStorage, excludeMissingPreimages)
json, err := json.MarshalIndent(dump, "", " ") json, err := json.MarshalIndent(dump, "", " ")
if err != nil { if err != nil {
fmt.Println("dump err", err) fmt.Println("Dump err", err)
} }
return json return json
} }
// IterativeDump dumps out accounts as json-objects, delimited by linebreaks on stdout // IterativeDump dumps out accounts as json-objects, delimited by linebreaks on stdout
func (s *StateDB) IterativeDump(excludeCode, excludeStorage, excludeMissingPreimages bool, output *json.Encoder) { func (s *StateDB) IterativeDump(excludeCode, excludeStorage, excludeMissingPreimages bool, output *json.Encoder) {
s.dump(iterativeDump{output}, excludeCode, excludeStorage, excludeMissingPreimages, nil, 0) s.DumpToCollector(iterativeDump{output}, excludeCode, excludeStorage, excludeMissingPreimages, nil, 0)
} }
// IteratorDump dumps out a batch of accounts starts with the given start key // IteratorDump dumps out a batch of accounts starts with the given start key
@ -190,6 +199,6 @@ func (s *StateDB) IteratorDump(excludeCode, excludeStorage, excludeMissingPreima
iterator := &IteratorDump{ iterator := &IteratorDump{
Accounts: make(map[common.Address]DumpAccount), Accounts: make(map[common.Address]DumpAccount),
} }
iterator.Next = s.dump(iterator, excludeCode, excludeStorage, excludeMissingPreimages, start, maxResults) iterator.Next = s.DumpToCollector(iterator, excludeCode, excludeStorage, excludeMissingPreimages, start, maxResults)
return *iterator return *iterator
} }

4
core/state/state_test.go
View File

@ -56,7 +56,7 @@ func TestDump(t *testing.T) {
s.state.updateStateObject(obj2) s.state.updateStateObject(obj2)
s.state.Commit(false) s.state.Commit(false)
// check that dump contains the state objects that are in trie // check that DumpToCollector contains the state objects that are in trie
got := string(s.state.Dump(false, false, true)) got := string(s.state.Dump(false, false, true))
want := `{ want := `{
"root": "71edff0130dd2385947095001c73d9e28d862fc286fca2b922ca6f6f3cddfdd2", "root": "71edff0130dd2385947095001c73d9e28d862fc286fca2b922ca6f6f3cddfdd2",
@ -83,7 +83,7 @@ func TestDump(t *testing.T) {
} }
}` }`
if got != want { if got != want {
t.Errorf("dump mismatch:\ngot: %s\nwant: %s\n", got, want) t.Errorf("DumpToCollector mismatch:\ngot: %s\nwant: %s\n", got, want)
} }
} }

34
core/vm/eips.go
View File

@ -18,30 +18,44 @@ package vm
import ( import (
"fmt" "fmt"
"sort"
"github.com/ethereum/go-ethereum/params" "github.com/ethereum/go-ethereum/params"
"github.com/holiman/uint256" "github.com/holiman/uint256"
) )
var activators = map[int]func(*JumpTable){
2200: enable2200,
1884: enable1884,
1344: enable1344,
2315: enable2315,
}
// EnableEIP enables the given EIP on the config. // EnableEIP enables the given EIP on the config.
// This operation writes in-place, and callers need to ensure that the globally // This operation writes in-place, and callers need to ensure that the globally
// defined jump tables are not polluted. // defined jump tables are not polluted.
func EnableEIP(eipNum int, jt *JumpTable) error { func EnableEIP(eipNum int, jt *JumpTable) error {
switch eipNum { enablerFn, ok := activators[eipNum]
case 2200: if !ok {
enable2200(jt)
case 1884:
enable1884(jt)
case 1344:
enable1344(jt)
case 2315:
enable2315(jt)
default:
return fmt.Errorf("undefined eip %d", eipNum) return fmt.Errorf("undefined eip %d", eipNum)
} }
enablerFn(jt)
return nil return nil
} }
func ValidEip(eipNum int) bool {
_, ok := activators[eipNum]
return ok
}
func ActivateableEips() []string {
var nums []string
for k := range activators {
nums = append(nums, fmt.Sprintf("%d", k))
}
sort.Strings(nums)
return nums
}
// enable1884 applies EIP-1884 to the given jump table: // enable1884 applies EIP-1884 to the given jump table:
// - Increase cost of BALANCE to 700 // - Increase cost of BALANCE to 700
// - Increase cost of EXTCODEHASH to 700 // - Increase cost of EXTCODEHASH to 700

11
tests/init.go
View File

@ -19,6 +19,7 @@ package tests
import ( import (
"fmt" "fmt"
"math/big" "math/big"
"sort"
"github.com/ethereum/go-ethereum/params" "github.com/ethereum/go-ethereum/params"
) )
@ -154,6 +155,16 @@ var Forks = map[string]*params.ChainConfig{
}, },
} }
// Returns the set of defined fork names
func AvailableForks() []string {
var availableForks []string
for k := range Forks {
availableForks = append(availableForks, k)
}
sort.Strings(availableForks)
return availableForks
}
// UnsupportedForkError is returned when a test requests a fork that isn't implemented. // UnsupportedForkError is returned when a test requests a fork that isn't implemented.
type UnsupportedForkError struct { type UnsupportedForkError struct {
Name string Name string

9
tests/state_test_util.go
View File

@ -112,11 +112,11 @@ type stTransactionMarshaling struct {
PrivateKey hexutil.Bytes PrivateKey hexutil.Bytes
} }
// getVMConfig takes a fork definition and returns a chain config. // GetChainConfig takes a fork definition and returns a chain config.
// The fork definition can be // The fork definition can be
// - a plain forkname, e.g. `Byzantium`, // - a plain forkname, e.g. `Byzantium`,
// - a fork basename, and a list of EIPs to enable; e.g. `Byzantium+1884+1283`. // - a fork basename, and a list of EIPs to enable; e.g. `Byzantium+1884+1283`.
func getVMConfig(forkString string) (baseConfig *params.ChainConfig, eips []int, err error) { func GetChainConfig(forkString string) (baseConfig *params.ChainConfig, eips []int, err error) {
var ( var (
splitForks = strings.Split(forkString, "+") splitForks = strings.Split(forkString, "+")
ok bool ok bool
@ -129,6 +129,9 @@ func getVMConfig(forkString string) (baseConfig *params.ChainConfig, eips []int,
if eipNum, err := strconv.Atoi(eip); err != nil { if eipNum, err := strconv.Atoi(eip); err != nil {
return nil, nil, fmt.Errorf("syntax error, invalid eip number %v", eipNum) return nil, nil, fmt.Errorf("syntax error, invalid eip number %v", eipNum)
} else { } else {
if !vm.ValidEip(eipNum) {
return nil, nil, fmt.Errorf("syntax error, invalid eip number %v", eipNum)
}
eips = append(eips, eipNum) eips = append(eips, eipNum)
} }
} }
@ -166,7 +169,7 @@ func (t *StateTest) Run(subtest StateSubtest, vmconfig vm.Config, snapshotter bo
// RunNoVerify runs a specific subtest and returns the statedb and post-state root // RunNoVerify runs a specific subtest and returns the statedb and post-state root
func (t *StateTest) RunNoVerify(subtest StateSubtest, vmconfig vm.Config, snapshotter bool) (*snapshot.Tree, *state.StateDB, common.Hash, error) { func (t *StateTest) RunNoVerify(subtest StateSubtest, vmconfig vm.Config, snapshotter bool) (*snapshot.Tree, *state.StateDB, common.Hash, error) {
config, eips, err := getVMConfig(subtest.Fork) config, eips, err := GetChainConfig(subtest.Fork)
if err != nil { if err != nil {
return nil, nil, common.Hash{}, UnsupportedForkError{subtest.Fork} return nil, nil, common.Hash{}, UnsupportedForkError{subtest.Fork}
} }