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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,188 @@ | ||
| package arbtest | ||
|
|
||
| import ( | ||
| "context" | ||
| "crypto/tls" | ||
| "crypto/x509" | ||
| "encoding/json" | ||
| "fmt" | ||
| "io" | ||
| "math/big" | ||
| "net/http" | ||
| "os" | ||
| "testing" | ||
| "time" | ||
|
|
||
| "github.com/ethereum/go-ethereum/accounts/abi/bind" | ||
| "github.com/ethereum/go-ethereum/accounts/keystore" | ||
| "github.com/ethereum/go-ethereum/common" | ||
| "github.com/ethereum/go-ethereum/common/hexutil" | ||
| "github.com/ethereum/go-ethereum/core/types" | ||
| "github.com/ethereum/go-ethereum/rlp" | ||
| "github.com/ethereum/go-ethereum/signer/core/apitypes" | ||
| "github.com/offchainlabs/nitro/arbnode/dataposter" | ||
| ) | ||
|
|
||
| var ( | ||
| signerPort = 1234 | ||
| signerURL = fmt.Sprintf("https://localhost:%v", signerPort) | ||
| signerMethod = "test_signTransaction" | ||
| signerServerCert = "../arbnode/dataposter/testdata/localhost.crt" | ||
| signerServerKey = "../arbnode/dataposter/testdata/localhost.key" | ||
| signerClientCert = "../arbnode/dataposter/testdata/client.crt" | ||
| signerClientPrivateKey = "../arbnode/dataposter/testdata/client.key" | ||
| ) | ||
|
|
||
| func externalSignerTestCfg(addr common.Address) *dataposter.ExternalSignerCfg { | ||
| return &dataposter.ExternalSignerCfg{ | ||
| Address: common.Bytes2Hex(addr.Bytes()), | ||
| URL: signerURL, | ||
| Method: signerMethod, | ||
| RootCA: signerServerCert, | ||
| ClientCert: signerClientCert, | ||
| ClientPrivateKey: signerClientPrivateKey, | ||
| } | ||
| } | ||
|
|
||
| type server struct { | ||
| handlers map[string]func(*json.RawMessage) (string, error) | ||
| signerFn bind.SignerFn | ||
| address common.Address | ||
| } | ||
|
|
||
| type request struct { | ||
| ID *json.RawMessage `json:"id"` | ||
| Method string `json:"method"` | ||
| Params *json.RawMessage `json:"params"` | ||
| } | ||
|
|
||
| type response struct { | ||
| ID *json.RawMessage `json:"id"` | ||
| Result string `json:"result,omitempty"` | ||
| } | ||
|
|
||
| // newServer returns http server and server struct that implements RPC methods. | ||
| // It sets up an account in temporary directory and cleans up after test is | ||
| // done. | ||
| func newServer(ctx context.Context, t *testing.T) (*http.Server, *server) { | ||
| t.Helper() | ||
| signer, address, err := setupAccount("/tmp/keystore") | ||
| if err != nil { | ||
| t.Fatalf("Error setting up account: %v", err) | ||
| } | ||
| t.Cleanup(func() { os.RemoveAll("/tmp/keystore") }) | ||
|
|
||
| s := &server{signerFn: signer, address: address} | ||
| s.handlers = map[string]func(*json.RawMessage) (string, error){ | ||
| signerMethod: s.signTransaction, | ||
| } | ||
| m := http.NewServeMux() | ||
|
|
||
| clientCert, err := os.ReadFile(signerClientCert) | ||
| if err != nil { | ||
| t.Fatalf("Error reading client certificate: %v", err) | ||
| } | ||
| pool := x509.NewCertPool() | ||
| pool.AppendCertsFromPEM(clientCert) | ||
|
|
||
| httpSrv := &http.Server{ | ||
| Addr: fmt.Sprintf(":%v", signerPort), | ||
| Handler: m, | ||
| ReadTimeout: 5 * time.Second, | ||
| TLSConfig: &tls.Config{ | ||
| MinVersion: tls.VersionTLS12, | ||
| ClientAuth: tls.RequireAndVerifyClientCert, | ||
| ClientCAs: pool, | ||
| }, | ||
| } | ||
| m.HandleFunc("/", s.mux) | ||
| return httpSrv, s | ||
| } | ||
|
|
||
| // setupAccount creates a new account in a given directory, unlocks it, creates | ||
| // signer with that account and returns it along with account address. | ||
| func setupAccount(dir string) (bind.SignerFn, common.Address, error) { | ||
| ks := keystore.NewKeyStore( | ||
| dir, | ||
| keystore.StandardScryptN, | ||
| keystore.StandardScryptP, | ||
| ) | ||
| a, err := ks.NewAccount("password") | ||
| if err != nil { | ||
| return nil, common.Address{}, fmt.Errorf("creating account account: %w", err) | ||
| } | ||
| if err := ks.Unlock(a, "password"); err != nil { | ||
| return nil, common.Address{}, fmt.Errorf("unlocking account: %w", err) | ||
| } | ||
| txOpts, err := bind.NewKeyStoreTransactorWithChainID(ks, a, big.NewInt(1337)) | ||
| if err != nil { | ||
| return nil, common.Address{}, fmt.Errorf("creating transactor: %w", err) | ||
| } | ||
| return txOpts.Signer, a.Address, nil | ||
| } | ||
|
|
||
| // UnmarshallFirst unmarshalls slice of params and returns the first one. | ||
| // Parameters in Go ethereum RPC calls are marashalled as slices. E.g. | ||
| // eth_sendRawTransaction or eth_signTransaction, marshall transaction as a | ||
| // slice of transactions in a message: | ||
| // https://github.com/ethereum/go-ethereum/blob/0004c6b229b787281760b14fb9460ffd9c2496f1/rpc/client.go#L548 | ||
| func unmarshallFirst(params []byte) (*types.Transaction, error) { | ||
| var arr []apitypes.SendTxArgs | ||
| if err := json.Unmarshal(params, &arr); err != nil { | ||
| return nil, fmt.Errorf("unmarshaling first param: %w", err) | ||
| } | ||
| if len(arr) != 1 { | ||
| return nil, fmt.Errorf("argument should be a single transaction, but got: %d", len(arr)) | ||
| } | ||
| return arr[0].ToTransaction(), nil | ||
| } | ||
|
|
||
| func (s *server) signTransaction(params *json.RawMessage) (string, error) { | ||
| tx, err := unmarshallFirst(*params) | ||
| if err != nil { | ||
| return "", err | ||
| } | ||
| signedTx, err := s.signerFn(s.address, tx) | ||
| if err != nil { | ||
| return "", fmt.Errorf("signing transaction: %w", err) | ||
| } | ||
| data, err := rlp.EncodeToBytes(signedTx) | ||
| if err != nil { | ||
| return "", fmt.Errorf("rlp encoding transaction: %w", err) | ||
| } | ||
| return hexutil.Encode(data), nil | ||
| } | ||
|
|
||
| func (s *server) mux(w http.ResponseWriter, r *http.Request) { | ||
| body, err := io.ReadAll(r.Body) | ||
| if err != nil { | ||
| http.Error(w, "can't read body", http.StatusBadRequest) | ||
| return | ||
| } | ||
| var req request | ||
| if err := json.Unmarshal(body, &req); err != nil { | ||
| http.Error(w, "can't unmarshal JSON request", http.StatusBadRequest) | ||
| return | ||
| } | ||
| method, ok := s.handlers[req.Method] | ||
| if !ok { | ||
| http.Error(w, "method not found", http.StatusNotFound) | ||
| return | ||
| } | ||
| result, err := method(req.Params) | ||
| if err != nil { | ||
| fmt.Printf("error calling method: %v\n", err) | ||
| http.Error(w, "error calling method", http.StatusInternalServerError) | ||
| return | ||
| } | ||
| resp := response{ID: req.ID, Result: result} | ||
| respBytes, err := json.Marshal(resp) | ||
| if err != nil { | ||
| http.Error(w, fmt.Sprintf("error encoding response: %v", err), http.StatusInternalServerError) | ||
| return | ||
| } | ||
| w.Header().Set("Content-Type", "application/json") | ||
| if _, err := w.Write(respBytes); err != nil { | ||
| fmt.Printf("error writing response: %v\n", err) | ||
| } | ||
| } |