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Add package
w3vm for simulating EVM message execution (#58)
* added multiEVMLogger * added `defaultChainConfig` * added `Receipt` * switching to `go-ethereum` head * added `VM` API * added `Fetcher` interface * added `Option`'s * added `nilToZero` util * moved and added zero values * state: added `RPCFetcher` * state: added `noopKeyValueStore` * state: added `noopNodeIterator` and fixed `noopBatch` * state: added `DB` * state: renamed `account2` -> `account` * added `defaultBlockContext` * internal/mod: init * state: added `Account` marshalling test * state: added `forkState` * state: added `NewTestingRPCFetcher` * added `TestVMApply_Integration` * added `VM` implementation * w3types: using `types.EmptyCodeHash` * upgraded `go-ethereum` * filter nil-EVMLoggers in multiEVMLogger * refactored db + drop all db storage logic * moved `w3.RandA()` to `w3vm.RandA()` * state: drop unused noop structs * added testdata * added `.gitattributes` * try change selector * move * fixed name * changed selector * added `VM.Apply` tests * added WETH storage slot utils * added `VM` tests * added `VM` Benchmark * not always revert to zero, but take a snapshot in the before the call/apply instead * disable BaseFee for calls * fixing storage overwriting * adding support for `WithFork` * dependency upgrade * added more integration test blocks * ignore nil-Option's * fixed repetitive state read * state: fixed forkState change detection * reverted dependency update * updated comment * upgraded to Go1.21 * dependency update * dropped `Returner` interface for `CallFuncFactory` struct * upgraded ´go-ethereum` * return fetch error in vm state access methods * refactored `VM` * fixed `WithNoBaseFee` option * doc update * added support for pending block number * state: changed API visibility * merged package `w3vm/state` and `w3vm` * return `ErrRevert` for revert errors * improved doc * updated `defaultBlockContext()` * exposed `Slot` and `Slot2` * added `WETHBalanceSlot` example * doc update * fixed fetcher setup in `New` * doc update --------- Co-authored-by: lmittmann <lmittmann@users.noreply.github.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1 @@ | ||
| testdata/ linguist-generated=true |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,20 @@ | ||
| package mod | ||
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| import ( | ||
| "os/exec" | ||
| "strings" | ||
| ) | ||
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| // Root contains the absolute path of the module root. Its value is empty if | ||
| // used outside of a module. | ||
| var Root string | ||
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| func init() { | ||
| stdout, _ := exec.Command("go", "env", "GOMOD").Output() | ||
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| var ok bool | ||
| Root, ok = strings.CutSuffix(strings.TrimSpace(string(stdout)), "/go.mod") | ||
| if !ok { | ||
| Root = "" | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,14 @@ | ||
| package mod_test | ||
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| import ( | ||
| "strings" | ||
| "testing" | ||
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| "github.com/lmittmann/w3/internal/mod" | ||
| ) | ||
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| func TestModRoot(t *testing.T) { | ||
| if !strings.HasSuffix(mod.Root, "w3") { | ||
| t.Fatalf("Unexpected module root: %q", mod.Root) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,141 @@ | ||
| package w3vm | ||
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| import ( | ||
| "errors" | ||
| "math/big" | ||
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| "github.com/ethereum/go-ethereum/common" | ||
| gethState "github.com/ethereum/go-ethereum/core/state" | ||
| "github.com/ethereum/go-ethereum/core/types" | ||
| "github.com/ethereum/go-ethereum/ethdb" | ||
| "github.com/ethereum/go-ethereum/trie" | ||
| "github.com/ethereum/go-ethereum/trie/trienode" | ||
| "github.com/lmittmann/w3/internal/crypto" | ||
| ) | ||
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| var errNotFound = errors.New("not found") | ||
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| // db implements the [state.Database] and [state.Trie] interfaces. | ||
| type db struct { | ||
| fetcher Fetcher | ||
| } | ||
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| func newDB(fetcher Fetcher) *db { | ||
| return &db{ | ||
| fetcher: fetcher, | ||
| } | ||
| } | ||
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| //////////////////////////////////////////////////////////////////////////////////////////////////// | ||
| // state.Database methods ////////////////////////////////////////////////////////////////////////// | ||
| //////////////////////////////////////////////////////////////////////////////////////////////////// | ||
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| func (db *db) OpenTrie(root common.Hash) (gethState.Trie, error) { return db, nil } | ||
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| func (db *db) OpenStorageTrie(stateRoot common.Hash, addr common.Address, root common.Hash) (gethState.Trie, error) { | ||
| return db, nil | ||
| } | ||
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| func (*db) CopyTrie(gethState.Trie) gethState.Trie { panic("not implemented") } | ||
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| func (db *db) ContractCode(addr common.Address, codeHash common.Hash) ([]byte, error) { | ||
| if db.fetcher == nil { | ||
| return []byte{}, nil | ||
| } | ||
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| code, err := db.fetcher.Code(addr) | ||
| if err != nil { | ||
| return nil, errNotFound | ||
| } | ||
| return code, nil | ||
| } | ||
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| func (db *db) ContractCodeSize(addr common.Address, codeHash common.Hash) (int, error) { | ||
| code, err := db.ContractCode(addr, codeHash) | ||
| if err != nil { | ||
| return 0, err | ||
| } | ||
| return len(code), nil | ||
| } | ||
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| func (*db) DiskDB() ethdb.KeyValueStore { panic("not implemented") } | ||
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| func (*db) TrieDB() *trie.Database { panic("not implemented") } | ||
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| //////////////////////////////////////////////////////////////////////////////////////////////////// | ||
| // state.Trie methods ////////////////////////////////////////////////////////////////////////////// | ||
| //////////////////////////////////////////////////////////////////////////////////////////////////// | ||
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| func (*db) GetKey([]byte) []byte { panic("not implemented") } | ||
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| func (db *db) GetStorage(addr common.Address, key []byte) ([]byte, error) { | ||
| if db.fetcher == nil { | ||
| return []byte{}, nil | ||
| } | ||
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| storageKey := common.BytesToHash(key) | ||
| storageVal, err := db.fetcher.StorageAt(addr, storageKey) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return storageVal.Bytes(), nil | ||
| } | ||
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| func (db *db) GetAccount(addr common.Address) (*types.StateAccount, error) { | ||
| if db.fetcher == nil { | ||
| return &types.StateAccount{ | ||
| Balance: new(big.Int), | ||
| CodeHash: types.EmptyCodeHash[:], | ||
| }, nil | ||
| } | ||
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| nonce, err := db.fetcher.Nonce(addr) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| balance, err := db.fetcher.Balance(addr) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| code, err := db.fetcher.Code(addr) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
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| var codeHash []byte | ||
| if len(code) == 0 { | ||
| codeHash = types.EmptyCodeHash[:] | ||
| } else { | ||
| codeHash = crypto.Keccak256(code) | ||
| } | ||
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| return &types.StateAccount{ | ||
| Nonce: nonce, | ||
| Balance: balance, | ||
| CodeHash: codeHash, | ||
| }, nil | ||
| } | ||
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| func (*db) UpdateStorage(addr common.Address, key, value []byte) error { panic("not implemented") } | ||
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| func (*db) UpdateAccount(addr common.Address, acc *types.StateAccount) error { | ||
| panic("not implemented") | ||
| } | ||
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| func (*db) UpdateContractCode(addr common.Address, codeHash common.Hash, code []byte) error { | ||
| panic("not implemented") | ||
| } | ||
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| func (*db) DeleteStorage(addr common.Address, key []byte) error { panic("not implemented") } | ||
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| func (*db) DeleteAccount(addr common.Address) error { panic("not implemented") } | ||
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| func (*db) Hash() common.Hash { panic("not implemented") } | ||
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| func (*db) Commit(collectLeaf bool) (common.Hash, *trienode.NodeSet, error) { | ||
| panic("not implemented") | ||
| } | ||
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| func (*db) NodeIterator(startKey []byte) (trie.NodeIterator, error) { panic("not implemented") } | ||
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| func (*db) Prove(key []byte, proofDb ethdb.KeyValueWriter) error { panic("not implemented") } |
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