package tests import ( "bytes" "encoding/hex" "encoding/json" "errors" "fmt" "io/ioutil" "math/big" "runtime" "strconv" "strings" "github.com/ethereum/go-ethereum/core/types" "github.com/ethereum/go-ethereum/ethutil" "github.com/ethereum/go-ethereum/rlp" "github.com/ethereum/go-ethereum/state" ) // Block Test JSON Format type btJSON struct { Blocks []btBlock GenesisBlockHeader btHeader Pre map[string]btAccount } type btAccount struct { Balance string Code string Nonce string Storage map[string]string } type btHeader struct { Bloom string Coinbase string MixHash string Nonce string Number string ParentHash string ReceiptTrie string SeedHash string StateRoot string TransactionsTrie string UncleHash string ExtraData string Difficulty string GasLimit string GasUsed string Timestamp string } type btTransaction struct { Data string GasLimit string GasPrice string Nonce string R string S string To string V string Value string } type btBlock struct { BlockHeader *btHeader Rlp string Transactions []btTransaction UncleHeaders []string } type BlockTest struct { Genesis *types.Block Blocks []*types.Block preAccounts map[string]btAccount } // LoadBlockTests loads a block test JSON file. func LoadBlockTests(file string) (map[string]*BlockTest, error) { bt := make(map[string]*btJSON) if err := loadJSON(file, &bt); err != nil { return nil, err } out := make(map[string]*BlockTest) for name, in := range bt { var err error if out[name], err = convertTest(in); err != nil { return nil, fmt.Errorf("bad test %q: %v", err) } } return out, nil } // InsertPreState populates the given database with the genesis // accounts defined by the test. func (t *BlockTest) InsertPreState(db ethutil.Database) error { statedb := state.New(nil, db) for addrString, acct := range t.preAccounts { // XXX: is is worth it checking for errors here? addr, _ := hex.DecodeString(addrString) code, _ := hex.DecodeString(strings.TrimPrefix(acct.Code, "0x")) balance, _ := new(big.Int).SetString(acct.Balance, 0) nonce, _ := strconv.ParseUint(acct.Nonce, 16, 64) obj := statedb.NewStateObject(addr) obj.SetCode(code) obj.SetBalance(balance) obj.SetNonce(nonce) // for k, v := range acct.Storage { // obj.SetState(k, v) // } } // sync objects to trie statedb.Update(nil) // sync trie to disk statedb.Sync() if !bytes.Equal(t.Genesis.Root(), statedb.Root()) { return errors.New("computed state root does not match genesis block") } return nil } func convertTest(in *btJSON) (out *BlockTest, err error) { // the conversion handles errors by catching panics. // you might consider this ugly, but the alternative (passing errors) // would be much harder to read. defer func() { if recovered := recover(); recovered != nil { buf := make([]byte, 64<<10) buf = buf[:runtime.Stack(buf, false)] err = fmt.Errorf("%v\n%s", recovered, buf) } }() out = &BlockTest{preAccounts: in.Pre} out.Genesis = mustConvertGenesis(in.GenesisBlockHeader) out.Blocks = mustConvertBlocks(in.Blocks) return out, err } func mustConvertGenesis(testGenesis btHeader) *types.Block { hdr := mustConvertHeader(testGenesis) hdr.Number = big.NewInt(0) b := types.NewBlockWithHeader(hdr) b.Td = new(big.Int) b.Reward = new(big.Int) return b } func mustConvertHeader(in btHeader) *types.Header { // hex decode these fields return &types.Header{ SeedHash: mustConvertBytes(in.SeedHash), MixDigest: mustConvertBytes(in.MixHash), Bloom: mustConvertBytes(in.Bloom), ReceiptHash: mustConvertBytes(in.ReceiptTrie), TxHash: mustConvertBytes(in.TransactionsTrie), Root: mustConvertBytes(in.StateRoot), Coinbase: mustConvertBytes(in.Coinbase), UncleHash: mustConvertBytes(in.UncleHash), ParentHash: mustConvertBytes(in.ParentHash), Nonce: mustConvertBytes(in.Nonce), Extra: string(mustConvertBytes(in.ExtraData)), GasUsed: mustConvertBigInt10(in.GasUsed), GasLimit: mustConvertBigInt10(in.GasLimit), Difficulty: mustConvertBigInt10(in.Difficulty), Time: mustConvertUint(in.Timestamp), } } func mustConvertBlocks(testBlocks []btBlock) []*types.Block { var out []*types.Block for i, inb := range testBlocks { var b types.Block r := bytes.NewReader(mustConvertBytes(inb.Rlp)) if err := rlp.Decode(r, &b); err != nil { panic(fmt.Errorf("invalid block %d: %q", i, inb.Rlp)) } out = append(out, &b) } return out } func mustConvertBytes(in string) []byte { out, err := hex.DecodeString(strings.TrimPrefix(in, "0x")) if err != nil { panic(fmt.Errorf("invalid hex: %q", in)) } return out } func mustConvertBigInt10(in string) *big.Int { out, ok := new(big.Int).SetString(in, 10) if !ok { panic(fmt.Errorf("invalid integer: %q", in)) } return out } func mustConvertUint(in string) uint64 { out, err := strconv.ParseUint(in, 0, 64) if err != nil { panic(fmt.Errorf("invalid integer: %q", in)) } return out } // loadJSON reads the given file and unmarshals its content. func loadJSON(file string, val interface{}) error { content, err := ioutil.ReadFile(file) if err != nil { return err } if err := json.Unmarshal(content, val); err != nil { if syntaxerr, ok := err.(*json.SyntaxError); ok { line := findLine(content, syntaxerr.Offset) return fmt.Errorf("JSON syntax error at %v:%v: %v", file, line, err) } return fmt.Errorf("JSON unmarshal error in %v: %v", file, err) } return nil } // findLine returns the line number for the given offset into data. func findLine(data []byte, offset int64) (line int) { line = 1 for i, r := range string(data) { if int64(i) >= offset { return } if r == '\n' { line++ } } return }