package conformance import ( "bytes" "compress/gzip" "context" "encoding/base64" "fmt" "io/ioutil" "os" "os/exec" "strconv" "github.com/fatih/color" "github.com/filecoin-project/go-state-types/abi" "github.com/filecoin-project/go-state-types/exitcode" "github.com/hashicorp/go-multierror" blocks "github.com/ipfs/go-block-format" "github.com/ipfs/go-blockservice" "github.com/ipfs/go-cid" ds "github.com/ipfs/go-datastore" offline "github.com/ipfs/go-ipfs-exchange-offline" format "github.com/ipfs/go-ipld-format" "github.com/ipfs/go-merkledag" "github.com/ipld/go-car" "github.com/filecoin-project/test-vectors/schema" "github.com/filecoin-project/lotus/blockstore" "github.com/filecoin-project/lotus/chain/types" "github.com/filecoin-project/lotus/chain/vm" ) // FallbackBlockstoreGetter is a fallback blockstore to use for resolving CIDs // unknown to the test vector. This is rarely used, usually only needed // when transplanting vectors across versions. This is an interface tighter // than ChainModuleAPI. It can be backed by a FullAPI client. var FallbackBlockstoreGetter interface { ChainReadObj(context.Context, cid.Cid) ([]byte, error) } var TipsetVectorOpts struct { // PipelineBaseFee pipelines the basefee in multi-tipset vectors from one // tipset to another. Basefees in the vector are ignored, except for that of // the first tipset. UNUSED. PipelineBaseFee bool // OnTipsetApplied contains callback functions called after a tipset has been // applied. OnTipsetApplied []func(bs blockstore.Blockstore, params *ExecuteTipsetParams, res *ExecuteTipsetResult) } // ExecuteMessageVector executes a message-class test vector. func ExecuteMessageVector(r Reporter, vector *schema.TestVector, variant *schema.Variant) (diffs []string, err error) { var ( ctx = context.Background() baseEpoch = variant.Epoch root = vector.Pre.StateTree.RootCID ) // Load the CAR into a new temporary Blockstore. bs, err := LoadBlockstore(vector.CAR) if err != nil { r.Fatalf("failed to load the vector CAR: %w", err) } // Create a new Driver. driver := NewDriver(ctx, vector.Selector, DriverOpts{DisableVMFlush: true}) // Apply every message. for i, m := range vector.ApplyMessages { msg, err := types.DecodeMessage(m.Bytes) if err != nil { r.Fatalf("failed to deserialize message: %s", err) } // add the epoch offset if one is set. if m.EpochOffset != nil { baseEpoch += *m.EpochOffset } // Execute the message. var ret *vm.ApplyRet ret, root, err = driver.ExecuteMessage(bs, ExecuteMessageParams{ Preroot: root, Epoch: abi.ChainEpoch(baseEpoch), Message: msg, BaseFee: BaseFeeOrDefault(vector.Pre.BaseFee), CircSupply: CircSupplyOrDefault(vector.Pre.CircSupply), Rand: NewReplayingRand(r, vector.Randomness), }) if err != nil { r.Fatalf("fatal failure when executing message: %s", err) } // Assert that the receipt matches what the test vector expects. AssertMsgResult(r, vector.Post.Receipts[i], ret, strconv.Itoa(i)) } // Once all messages are applied, assert that the final state root matches // the expected postcondition root. if expected, actual := vector.Post.StateTree.RootCID, root; expected != actual { ierr := fmt.Errorf("wrong post root cid; expected %v, but got %v", expected, actual) r.Errorf(ierr.Error()) err = multierror.Append(err, ierr) diffs = dumpThreeWayStateDiff(r, vector, bs, root) } return diffs, err } // ExecuteTipsetVector executes a tipset-class test vector. func ExecuteTipsetVector(r Reporter, vector *schema.TestVector, variant *schema.Variant) (diffs []string, err error) { var ( ctx = context.Background() baseEpoch = abi.ChainEpoch(variant.Epoch) root = vector.Pre.StateTree.RootCID tmpds = ds.NewMapDatastore() ) // Load the vector CAR into a new temporary Blockstore. bs, err := LoadBlockstore(vector.CAR) if err != nil { r.Fatalf("failed to load the vector CAR: %w", err) return nil, err } // Create a new Driver. driver := NewDriver(ctx, vector.Selector, DriverOpts{}) // Apply every tipset. var receiptsIdx int var prevEpoch = baseEpoch for i, ts := range vector.ApplyTipsets { ts := ts // capture execEpoch := baseEpoch + abi.ChainEpoch(ts.EpochOffset) params := ExecuteTipsetParams{ Preroot: root, ParentEpoch: prevEpoch, Tipset: &ts, ExecEpoch: execEpoch, Rand: NewReplayingRand(r, vector.Randomness), } ret, err := driver.ExecuteTipset(bs, tmpds, params) if err != nil { r.Fatalf("failed to apply tipset %d: %s", i, err) return nil, err } // invoke callbacks. for _, cb := range TipsetVectorOpts.OnTipsetApplied { cb(bs, ¶ms, ret) } for j, v := range ret.AppliedResults { AssertMsgResult(r, vector.Post.Receipts[receiptsIdx], v, fmt.Sprintf("%d of tipset %d", j, i)) receiptsIdx++ } // Compare the receipts root. if expected, actual := vector.Post.ReceiptsRoots[i], ret.ReceiptsRoot; expected != actual { ierr := fmt.Errorf("post receipts root doesn't match; expected: %s, was: %s", expected, actual) r.Errorf(ierr.Error()) err = multierror.Append(err, ierr) } prevEpoch = execEpoch root = ret.PostStateRoot } // Once all messages are applied, assert that the final state root matches // the expected postcondition root. if expected, actual := vector.Post.StateTree.RootCID, root; expected != actual { ierr := fmt.Errorf("wrong post root cid; expected %v, but got %v", expected, actual) r.Errorf(ierr.Error()) err = multierror.Append(err, ierr) diffs = dumpThreeWayStateDiff(r, vector, bs, root) } return diffs, err } // AssertMsgResult compares a message result. It takes the expected receipt // encoded in the vector, the actual receipt returned by Lotus, and a message // label to log in the assertion failure message to facilitate debugging. func AssertMsgResult(r Reporter, expected *schema.Receipt, actual *vm.ApplyRet, label string) { r.Helper() if expected, actual := exitcode.ExitCode(expected.ExitCode), actual.ExitCode; expected != actual { r.Errorf("exit code of msg %s did not match; expected: %s, got: %s", label, expected, actual) } if expected, actual := expected.GasUsed, actual.GasUsed; expected != actual { r.Errorf("gas used of msg %s did not match; expected: %d, got: %d", label, expected, actual) } if expected, actual := []byte(expected.ReturnValue), actual.Return; !bytes.Equal(expected, actual) { r.Errorf("return value of msg %s did not match; expected: %s, got: %s", label, base64.StdEncoding.EncodeToString(expected), base64.StdEncoding.EncodeToString(actual)) } } func dumpThreeWayStateDiff(r Reporter, vector *schema.TestVector, bs blockstore.Blockstore, actual cid.Cid) []string { // check if statediff exists; if not, skip. if err := exec.Command("statediff", "--help").Run(); err != nil { r.Log("could not dump 3-way state tree diff upon test failure: statediff command not found") r.Log("install statediff with:") r.Log("$ git clone https://github.com/filecoin-project/statediff.git") r.Log("$ cd statediff") r.Log("$ go generate ./...") r.Log("$ go install ./cmd/statediff") return nil } tmpCar, err := writeStateToTempCAR(bs, vector.Pre.StateTree.RootCID, vector.Post.StateTree.RootCID, actual, ) if err != nil { r.Fatalf("failed to write temporary state CAR: %s", err) return nil } defer os.RemoveAll(tmpCar) //nolint:errcheck color.NoColor = false // enable colouring. var ( a = color.New(color.FgMagenta, color.Bold).Sprint("(A) expected final state") b = color.New(color.FgYellow, color.Bold).Sprint("(B) actual final state") c = color.New(color.FgCyan, color.Bold).Sprint("(C) initial state") d1 = color.New(color.FgGreen, color.Bold).Sprint("[Δ1]") d2 = color.New(color.FgGreen, color.Bold).Sprint("[Δ2]") d3 = color.New(color.FgGreen, color.Bold).Sprint("[Δ3]") ) diff := func(left, right cid.Cid) string { cmd := exec.Command("statediff", "car", "--file", tmpCar, left.String(), right.String()) b, err := cmd.CombinedOutput() if err != nil { r.Fatalf("statediff failed: %s", err) } return string(b) } bold := color.New(color.Bold).SprintfFunc() r.Log(bold("-----BEGIN STATEDIFF-----")) // run state diffs. r.Log(bold("=== dumping 3-way diffs between %s, %s, %s ===", a, b, c)) r.Log(bold("--- %s left: %s; right: %s ---", d1, a, b)) diffA := diff(vector.Post.StateTree.RootCID, actual) r.Log(bold("----------BEGIN STATEDIFF A----------")) r.Log(diffA) r.Log(bold("----------END STATEDIFF A----------")) r.Log(bold("--- %s left: %s; right: %s ---", d2, c, b)) diffB := diff(vector.Pre.StateTree.RootCID, actual) r.Log(bold("----------BEGIN STATEDIFF B----------")) r.Log(diffB) r.Log(bold("----------END STATEDIFF B----------")) r.Log(bold("--- %s left: %s; right: %s ---", d3, c, a)) diffC := diff(vector.Pre.StateTree.RootCID, vector.Post.StateTree.RootCID) r.Log(bold("----------BEGIN STATEDIFF C----------")) r.Log(diffC) r.Log(bold("----------END STATEDIFF C----------")) r.Log(bold("-----END STATEDIFF-----")) return []string{diffA, diffB, diffC} } // writeStateToTempCAR writes the provided roots to a temporary CAR that'll be // cleaned up via t.Cleanup(). It returns the full path of the temp file. func writeStateToTempCAR(bs blockstore.Blockstore, roots ...cid.Cid) (string, error) { tmp, err := ioutil.TempFile("", "lotus-tests-*.car") if err != nil { return "", fmt.Errorf("failed to create temp file to dump CAR for diffing: %w", err) } carWalkFn := func(nd format.Node) (out []*format.Link, err error) { for _, link := range nd.Links() { if link.Cid.Prefix().Codec == cid.FilCommitmentSealed || link.Cid.Prefix().Codec == cid.FilCommitmentUnsealed { continue } // ignore things we don't have, the state tree is incomplete. if has, err := bs.Has(link.Cid); err != nil { return nil, err } else if has { out = append(out, link) } } return out, nil } var ( offl = offline.Exchange(bs) blkserv = blockservice.New(bs, offl) dserv = merkledag.NewDAGService(blkserv) ) err = car.WriteCarWithWalker(context.Background(), dserv, roots, tmp, carWalkFn) if err != nil { return "", fmt.Errorf("failed to dump CAR for diffing: %w", err) } _ = tmp.Close() return tmp.Name(), nil } func LoadBlockstore(vectorCAR schema.Base64EncodedBytes) (blockstore.Blockstore, error) { bs := blockstore.Blockstore(blockstore.NewMemory()) // Read the base64-encoded CAR from the vector, and inflate the gzip. buf := bytes.NewReader(vectorCAR) r, err := gzip.NewReader(buf) if err != nil { return nil, fmt.Errorf("failed to inflate gzipped CAR: %s", err) } defer r.Close() // nolint // Load the CAR embedded in the test vector into the Blockstore. _, err = car.LoadCar(bs, r) if err != nil { return nil, fmt.Errorf("failed to load state tree car from test vector: %s", err) } if FallbackBlockstoreGetter != nil { fbs := &blockstore.FallbackStore{Blockstore: bs} fbs.SetFallback(func(ctx context.Context, c cid.Cid) (blocks.Block, error) { b, err := FallbackBlockstoreGetter.ChainReadObj(ctx, c) if err != nil { return nil, err } return blocks.NewBlockWithCid(b, c) }) bs = fbs } return bs, nil }