types: Start using sigsum-lib-go

This commit does not change the way in which the log behaves externally.
In other words, all changes are internal and involves renaming and code
restructuring.  Most notably picking up the refactored sigsum-lib-go.

3 files changed, 0 insertions, 744 deletions

diff --git a/pkg/trillian/client.go b/pkg/trillian/client.go
deleted file mode 100644
index 6fe8ce4..0000000
--- a/pkg/trillian/client.go
+++ /dev/null
@@ -1,178 +0,0 @@
-package trillian
-
-import (
-	"context"
-	"fmt"
-
-	"github.com/golang/glog"
-	"github.com/google/trillian"
-	ttypes "github.com/google/trillian/types"
-	"git.sigsum.org/sigsum-log-go/pkg/types"
-	"google.golang.org/grpc/codes"
-)
-
-type Client interface {
-	AddLeaf(context.Context, *types.LeafRequest) error
-	GetConsistencyProof(context.Context, *types.ConsistencyProofRequest) (*types.ConsistencyProof, error)
-	GetTreeHead(context.Context) (*types.TreeHead, error)
-	GetInclusionProof(context.Context, *types.InclusionProofRequest) (*types.InclusionProof, error)
-	GetLeaves(context.Context, *types.LeavesRequest) (*types.LeafList, error)
-}
-
-// TrillianClient is a wrapper around the Trillian gRPC client.
-type TrillianClient struct {
-	// TreeID is a Merkle tree identifier that Trillian uses
-	TreeID int64
-
-	// GRPC is a Trillian gRPC client
-	GRPC trillian.TrillianLogClient
-}
-
-func (c *TrillianClient) AddLeaf(ctx context.Context, req *types.LeafRequest) error {
-	leaf := types.Leaf{
-		Message: req.Message,
-		SigIdent: types.SigIdent{
-			Signature: req.Signature,
-			KeyHash:   types.Hash(req.VerificationKey[:]),
-		},
-	}
-	serialized := leaf.Marshal()
-
-	glog.V(3).Infof("queueing leaf request: %x", types.HashLeaf(serialized))
-	rsp, err := c.GRPC.QueueLeaf(ctx, &trillian.QueueLeafRequest{
-		LogId: c.TreeID,
-		Leaf: &trillian.LogLeaf{
-			LeafValue: serialized,
-		},
-	})
-	if err != nil {
-		return fmt.Errorf("backend failure: %v", err)
-	}
-	if rsp == nil {
-		return fmt.Errorf("no response")
-	}
-	if rsp.QueuedLeaf == nil {
-		return fmt.Errorf("no queued leaf")
-	}
-	if codes.Code(rsp.QueuedLeaf.GetStatus().GetCode()) == codes.AlreadyExists {
-		return fmt.Errorf("leaf is already queued or included")
-	}
-	return nil
-}
-
-func (c *TrillianClient) GetTreeHead(ctx context.Context) (*types.TreeHead, error) {
-	rsp, err := c.GRPC.GetLatestSignedLogRoot(ctx, &trillian.GetLatestSignedLogRootRequest{
-		LogId: c.TreeID,
-	})
-	if err != nil {
-		return nil, fmt.Errorf("backend failure: %v", err)
-	}
-	if rsp == nil {
-		return nil, fmt.Errorf("no response")
-	}
-	if rsp.SignedLogRoot == nil {
-		return nil, fmt.Errorf("no signed log root")
-	}
-	if rsp.SignedLogRoot.LogRoot == nil {
-		return nil, fmt.Errorf("no log root")
-	}
-	var r ttypes.LogRootV1
-	if err := r.UnmarshalBinary(rsp.SignedLogRoot.LogRoot); err != nil {
-		return nil, fmt.Errorf("no log root: unmarshal failed: %v", err)
-	}
-	if len(r.RootHash) != types.HashSize {
-		return nil, fmt.Errorf("unexpected hash length: %d", len(r.RootHash))
-	}
-	return treeHeadFromLogRoot(&r), nil
-}
-
-func (c *TrillianClient) GetConsistencyProof(ctx context.Context, req *types.ConsistencyProofRequest) (*types.ConsistencyProof, error) {
-	rsp, err := c.GRPC.GetConsistencyProof(ctx, &trillian.GetConsistencyProofRequest{
-		LogId:          c.TreeID,
-		FirstTreeSize:  int64(req.OldSize),
-		SecondTreeSize: int64(req.NewSize),
-	})
-	if err != nil {
-		return nil, fmt.Errorf("backend failure: %v", err)
-	}
-	if rsp == nil {
-		return nil, fmt.Errorf("no response")
-	}
-	if rsp.Proof == nil {
-		return nil, fmt.Errorf("no consistency proof")
-	}
-	if len(rsp.Proof.Hashes) == 0 {
-		return nil, fmt.Errorf("not a consistency proof: empty")
-	}
-	path, err := nodePathFromHashes(rsp.Proof.Hashes)
-	if err != nil {
-		return nil, fmt.Errorf("not a consistency proof: %v", err)
-	}
-	return &types.ConsistencyProof{
-		OldSize: req.OldSize,
-		NewSize: req.NewSize,
-		Path:    path,
-	}, nil
-}
-
-func (c *TrillianClient) GetInclusionProof(ctx context.Context, req *types.InclusionProofRequest) (*types.InclusionProof, error) {
-	rsp, err := c.GRPC.GetInclusionProofByHash(ctx, &trillian.GetInclusionProofByHashRequest{
-		LogId:           c.TreeID,
-		LeafHash:        req.LeafHash[:],
-		TreeSize:        int64(req.TreeSize),
-		OrderBySequence: true,
-	})
-	if err != nil {
-		return nil, fmt.Errorf("backend failure: %v", err)
-	}
-	if rsp == nil {
-		return nil, fmt.Errorf("no response")
-	}
-	if len(rsp.Proof) != 1 {
-		return nil, fmt.Errorf("bad proof count: %d", len(rsp.Proof))
-	}
-	proof := rsp.Proof[0]
-	if len(proof.Hashes) == 0 {
-		return nil, fmt.Errorf("not an inclusion proof: empty")
-	}
-	path, err := nodePathFromHashes(proof.Hashes)
-	if err != nil {
-		return nil, fmt.Errorf("not an inclusion proof: %v", err)
-	}
-	return &types.InclusionProof{
-		TreeSize:  req.TreeSize,
-		LeafIndex: uint64(proof.LeafIndex),
-		Path:      path,
-	}, nil
-}
-
-func (c *TrillianClient) GetLeaves(ctx context.Context, req *types.LeavesRequest) (*types.LeafList, error) {
-	rsp, err := c.GRPC.GetLeavesByRange(ctx, &trillian.GetLeavesByRangeRequest{
-		LogId:      c.TreeID,
-		StartIndex: int64(req.StartSize),
-		Count:      int64(req.EndSize-req.StartSize) + 1,
-	})
-	if err != nil {
-		return nil, fmt.Errorf("backend failure: %v", err)
-	}
-	if rsp == nil {
-		return nil, fmt.Errorf("no response")
-	}
-	if got, want := len(rsp.Leaves), int(req.EndSize-req.StartSize+1); got != want {
-		return nil, fmt.Errorf("unexpected number of leaves: %d", got)
-	}
-	var list types.LeafList
-	for i, leaf := range rsp.Leaves {
-		leafIndex := int64(req.StartSize + uint64(i))
-		if leafIndex != leaf.LeafIndex {
-			return nil, fmt.Errorf("unexpected leaf(%d): got index %d", leafIndex, leaf.LeafIndex)
-		}
-
-		var l types.Leaf
-		if err := l.Unmarshal(leaf.LeafValue); err != nil {
-			return nil, fmt.Errorf("unexpected leaf(%d): %v", leafIndex, err)
-		}
-		list = append(list[:], &l)
-	}
-	return &list, nil
-}
diff --git a/pkg/trillian/client_test.go b/pkg/trillian/client_test.go
deleted file mode 100644
index 143c411..0000000
--- a/pkg/trillian/client_test.go
+++ /dev/null
@@ -1,533 +0,0 @@
-package trillian
-
-import (
-	"context"
-	"fmt"
-	"reflect"
-	"testing"
-
-	"github.com/golang/mock/gomock"
-	"github.com/google/trillian"
-	ttypes "github.com/google/trillian/types"
-	"git.sigsum.org/sigsum-log-go/pkg/mocks"
-	"git.sigsum.org/sigsum-log-go/pkg/types"
-	"google.golang.org/grpc/codes"
-	"google.golang.org/grpc/status"
-)
-
-func TestAddLeaf(t *testing.T) {
-	req := &types.LeafRequest{
-		Message: types.Message{
-			ShardHint: 0,
-			Checksum:  &[types.HashSize]byte{},
-		},
-		Signature:       &[types.SignatureSize]byte{},
-		VerificationKey: &[types.VerificationKeySize]byte{},
-		DomainHint:      "example.com",
-	}
-	for _, table := range []struct {
-		description string
-		req         *types.LeafRequest
-		rsp         *trillian.QueueLeafResponse
-		err         error
-		wantErr     bool
-	}{
-		{
-			description: "invalid: backend failure",
-			req:         req,
-			err:         fmt.Errorf("something went wrong"),
-			wantErr:     true,
-		},
-		{
-			description: "invalid: no response",
-			req:         req,
-			wantErr:     true,
-		},
-		{
-			description: "invalid: no queued leaf",
-			req:         req,
-			rsp:         &trillian.QueueLeafResponse{},
-			wantErr:     true,
-		},
-		{
-			description: "invalid: leaf is already queued or included",
-			req:         req,
-			rsp: &trillian.QueueLeafResponse{
-				QueuedLeaf: &trillian.QueuedLogLeaf{
-					Leaf: &trillian.LogLeaf{
-						LeafValue: req.Message.Marshal(),
-					},
-					Status: status.New(codes.AlreadyExists, "duplicate").Proto(),
-				},
-			},
-			wantErr: true,
-		},
-		{
-			description: "valid",
-			req:         req,
-			rsp: &trillian.QueueLeafResponse{
-				QueuedLeaf: &trillian.QueuedLogLeaf{
-					Leaf: &trillian.LogLeaf{
-						LeafValue: req.Message.Marshal(),
-					},
-					Status: status.New(codes.OK, "ok").Proto(),
-				},
-			},
-		},
-	} {
-		// Run deferred functions at the end of each iteration
-		func() {
-			ctrl := gomock.NewController(t)
-			defer ctrl.Finish()
-			grpc := mocks.NewMockTrillianLogClient(ctrl)
-			grpc.EXPECT().QueueLeaf(gomock.Any(), gomock.Any()).Return(table.rsp, table.err)
-			client := TrillianClient{GRPC: grpc}
-
-			err := client.AddLeaf(context.Background(), table.req)
-			if got, want := err != nil, table.wantErr; got != want {
-				t.Errorf("got error %v but wanted %v in test %q: %v", got, want, table.description, err)
-			}
-		}()
-	}
-}
-
-func TestGetTreeHead(t *testing.T) {
-	// valid root
-	root := &ttypes.LogRootV1{
-		TreeSize:       0,
-		RootHash:       make([]byte, types.HashSize),
-		TimestampNanos: 1622585623133599429,
-	}
-	buf, err := root.MarshalBinary()
-	if err != nil {
-		t.Fatalf("must marshal log root: %v", err)
-	}
-	// invalid root
-	root.RootHash = make([]byte, types.HashSize+1)
-	bufBadHash, err := root.MarshalBinary()
-	if err != nil {
-		t.Fatalf("must marshal log root: %v", err)
-	}
-
-	for _, table := range []struct {
-		description string
-		rsp         *trillian.GetLatestSignedLogRootResponse
-		err         error
-		wantErr     bool
-		wantTh      *types.TreeHead
-	}{
-		{
-			description: "invalid: backend failure",
-			err:         fmt.Errorf("something went wrong"),
-			wantErr:     true,
-		},
-		{
-			description: "invalid: no response",
-			wantErr:     true,
-		},
-		{
-			description: "invalid: no signed log root",
-			rsp:         &trillian.GetLatestSignedLogRootResponse{},
-			wantErr:     true,
-		},
-		{
-			description: "invalid: no log root",
-			rsp: &trillian.GetLatestSignedLogRootResponse{
-				SignedLogRoot: &trillian.SignedLogRoot{},
-			},
-			wantErr: true,
-		},
-		{
-			description: "invalid: no log root: unmarshal failed",
-			rsp: &trillian.GetLatestSignedLogRootResponse{
-				SignedLogRoot: &trillian.SignedLogRoot{
-					LogRoot: buf[1:],
-				},
-			},
-			wantErr: true,
-		},
-		{
-			description: "invalid: unexpected hash length",
-			rsp: &trillian.GetLatestSignedLogRootResponse{
-				SignedLogRoot: &trillian.SignedLogRoot{
-					LogRoot: bufBadHash,
-				},
-			},
-			wantErr: true,
-		},
-		{
-			description: "valid",
-			rsp: &trillian.GetLatestSignedLogRootResponse{
-				SignedLogRoot: &trillian.SignedLogRoot{
-					LogRoot: buf,
-				},
-			},
-			wantTh: &types.TreeHead{
-				Timestamp: 1622585623,
-				TreeSize:  0,
-				RootHash:  &[types.HashSize]byte{},
-			},
-		},
-	} {
-		// Run deferred functions at the end of each iteration
-		func() {
-			ctrl := gomock.NewController(t)
-			defer ctrl.Finish()
-			grpc := mocks.NewMockTrillianLogClient(ctrl)
-			grpc.EXPECT().GetLatestSignedLogRoot(gomock.Any(), gomock.Any()).Return(table.rsp, table.err)
-			client := TrillianClient{GRPC: grpc}
-
-			th, err := client.GetTreeHead(context.Background())
-			if got, want := err != nil, table.wantErr; got != want {
-				t.Errorf("got error %v but wanted %v in test %q: %v", got, want, table.description, err)
-			}
-			if err != nil {
-				return
-			}
-			if got, want := th, table.wantTh; !reflect.DeepEqual(got, want) {
-				t.Errorf("got tree head\n\t%v\nbut wanted\n\t%v\nin test %q", got, want, table.description)
-			}
-		}()
-	}
-}
-
-func TestGetConsistencyProof(t *testing.T) {
-	req := &types.ConsistencyProofRequest{
-		OldSize: 1,
-		NewSize: 3,
-	}
-	for _, table := range []struct {
-		description string
-		req         *types.ConsistencyProofRequest
-		rsp         *trillian.GetConsistencyProofResponse
-		err         error
-		wantErr     bool
-		wantProof   *types.ConsistencyProof
-	}{
-		{
-			description: "invalid: backend failure",
-			req:         req,
-			err:         fmt.Errorf("something went wrong"),
-			wantErr:     true,
-		},
-		{
-			description: "invalid: no response",
-			req:         req,
-			wantErr:     true,
-		},
-		{
-			description: "invalid: no consistency proof",
-			req:         req,
-			rsp:         &trillian.GetConsistencyProofResponse{},
-			wantErr:     true,
-		},
-		{
-			description: "invalid: not a consistency proof (1/2)",
-			req:         req,
-			rsp: &trillian.GetConsistencyProofResponse{
-				Proof: &trillian.Proof{
-					Hashes: [][]byte{},
-				},
-			},
-			wantErr: true,
-		},
-		{
-			description: "invalid: not a consistency proof (2/2)",
-			req:         req,
-			rsp: &trillian.GetConsistencyProofResponse{
-				Proof: &trillian.Proof{
-					Hashes: [][]byte{
-						make([]byte, types.HashSize),
-						make([]byte, types.HashSize+1),
-					},
-				},
-			},
-			wantErr: true,
-		},
-		{
-			description: "valid",
-			req:         req,
-			rsp: &trillian.GetConsistencyProofResponse{
-				Proof: &trillian.Proof{
-					Hashes: [][]byte{
-						make([]byte, types.HashSize),
-						make([]byte, types.HashSize),
-					},
-				},
-			},
-			wantProof: &types.ConsistencyProof{
-				OldSize: 1,
-				NewSize: 3,
-				Path: []*[types.HashSize]byte{
-					&[types.HashSize]byte{},
-					&[types.HashSize]byte{},
-				},
-			},
-		},
-	} {
-		// Run deferred functions at the end of each iteration
-		func() {
-			ctrl := gomock.NewController(t)
-			defer ctrl.Finish()
-			grpc := mocks.NewMockTrillianLogClient(ctrl)
-			grpc.EXPECT().GetConsistencyProof(gomock.Any(), gomock.Any()).Return(table.rsp, table.err)
-			client := TrillianClient{GRPC: grpc}
-
-			proof, err := client.GetConsistencyProof(context.Background(), table.req)
-			if got, want := err != nil, table.wantErr; got != want {
-				t.Errorf("got error %v but wanted %v in test %q: %v", got, want, table.description, err)
-			}
-			if err != nil {
-				return
-			}
-			if got, want := proof, table.wantProof; !reflect.DeepEqual(got, want) {
-				t.Errorf("got proof\n\t%v\nbut wanted\n\t%v\nin test %q", got, want, table.description)
-			}
-		}()
-	}
-}
-
-func TestGetInclusionProof(t *testing.T) {
-	req := &types.InclusionProofRequest{
-		TreeSize: 4,
-		LeafHash: &[types.HashSize]byte{},
-	}
-	for _, table := range []struct {
-		description string
-		req         *types.InclusionProofRequest
-		rsp         *trillian.GetInclusionProofByHashResponse
-		err         error
-		wantErr     bool
-		wantProof   *types.InclusionProof
-	}{
-		{
-			description: "invalid: backend failure",
-			req:         req,
-			err:         fmt.Errorf("something went wrong"),
-			wantErr:     true,
-		},
-		{
-			description: "invalid: no response",
-			req:         req,
-			wantErr:     true,
-		},
-		{
-			description: "invalid: bad proof count",
-			req:         req,
-			rsp: &trillian.GetInclusionProofByHashResponse{
-				Proof: []*trillian.Proof{
-					&trillian.Proof{},
-					&trillian.Proof{},
-				},
-			},
-			wantErr: true,
-		},
-		{
-			description: "invalid: not an inclusion proof (1/2)",
-			req:         req,
-			rsp: &trillian.GetInclusionProofByHashResponse{
-				Proof: []*trillian.Proof{
-					&trillian.Proof{
-						LeafIndex: 1,
-						Hashes:    [][]byte{},
-					},
-				},
-			},
-			wantErr: true,
-		},
-		{
-			description: "invalid: not an inclusion proof (2/2)",
-			req:         req,
-			rsp: &trillian.GetInclusionProofByHashResponse{
-				Proof: []*trillian.Proof{
-					&trillian.Proof{
-						LeafIndex: 1,
-						Hashes: [][]byte{
-							make([]byte, types.HashSize),
-							make([]byte, types.HashSize+1),
-						},
-					},
-				},
-			},
-			wantErr: true,
-		},
-		{
-			description: "valid",
-			req:         req,
-			rsp: &trillian.GetInclusionProofByHashResponse{
-				Proof: []*trillian.Proof{
-					&trillian.Proof{
-						LeafIndex: 1,
-						Hashes: [][]byte{
-							make([]byte, types.HashSize),
-							make([]byte, types.HashSize),
-						},
-					},
-				},
-			},
-			wantProof: &types.InclusionProof{
-				TreeSize:  4,
-				LeafIndex: 1,
-				Path: []*[types.HashSize]byte{
-					&[types.HashSize]byte{},
-					&[types.HashSize]byte{},
-				},
-			},
-		},
-	} {
-		// Run deferred functions at the end of each iteration
-		func() {
-			ctrl := gomock.NewController(t)
-			defer ctrl.Finish()
-			grpc := mocks.NewMockTrillianLogClient(ctrl)
-			grpc.EXPECT().GetInclusionProofByHash(gomock.Any(), gomock.Any()).Return(table.rsp, table.err)
-			client := TrillianClient{GRPC: grpc}
-
-			proof, err := client.GetInclusionProof(context.Background(), table.req)
-			if got, want := err != nil, table.wantErr; got != want {
-				t.Errorf("got error %v but wanted %v in test %q: %v", got, want, table.description, err)
-			}
-			if err != nil {
-				return
-			}
-			if got, want := proof, table.wantProof; !reflect.DeepEqual(got, want) {
-				t.Errorf("got proof\n\t%v\nbut wanted\n\t%v\nin test %q", got, want, table.description)
-			}
-		}()
-	}
-}
-
-func TestGetLeaves(t *testing.T) {
-	req := &types.LeavesRequest{
-		StartSize: 1,
-		EndSize:   2,
-	}
-	firstLeaf := &types.Leaf{
-		Message: types.Message{
-			ShardHint: 0,
-			Checksum:  &[types.HashSize]byte{},
-		},
-		SigIdent: types.SigIdent{
-			Signature: &[types.SignatureSize]byte{},
-			KeyHash:   &[types.HashSize]byte{},
-		},
-	}
-	secondLeaf := &types.Leaf{
-		Message: types.Message{
-			ShardHint: 0,
-			Checksum:  &[types.HashSize]byte{},
-		},
-		SigIdent: types.SigIdent{
-			Signature: &[types.SignatureSize]byte{},
-			KeyHash:   &[types.HashSize]byte{},
-		},
-	}
-
-	for _, table := range []struct {
-		description string
-		req         *types.LeavesRequest
-		rsp         *trillian.GetLeavesByRangeResponse
-		err         error
-		wantErr     bool
-		wantLeaves  *types.LeafList
-	}{
-		{
-			description: "invalid: backend failure",
-			req:         req,
-			err:         fmt.Errorf("something went wrong"),
-			wantErr:     true,
-		},
-		{
-			description: "invalid: no response",
-			req:         req,
-			wantErr:     true,
-		},
-		{
-			description: "invalid: unexpected number of leaves",
-			req:         req,
-			rsp: &trillian.GetLeavesByRangeResponse{
-				Leaves: []*trillian.LogLeaf{
-					&trillian.LogLeaf{
-						LeafValue: firstLeaf.Marshal(),
-						LeafIndex: 1,
-					},
-				},
-			},
-			wantErr: true,
-		},
-		{
-			description: "invalid: unexpected leaf (1/2)",
-			req:         req,
-			rsp: &trillian.GetLeavesByRangeResponse{
-				Leaves: []*trillian.LogLeaf{
-					&trillian.LogLeaf{
-						LeafValue: firstLeaf.Marshal(),
-						LeafIndex: 1,
-					},
-					&trillian.LogLeaf{
-						LeafValue: secondLeaf.Marshal(),
-						LeafIndex: 3,
-					},
-				},
-			},
-			wantErr: true,
-		},
-		{
-			description: "invalid: unexpected leaf (2/2)",
-			req:         req,
-			rsp: &trillian.GetLeavesByRangeResponse{
-				Leaves: []*trillian.LogLeaf{
-					&trillian.LogLeaf{
-						LeafValue: firstLeaf.Marshal(),
-						LeafIndex: 1,
-					},
-					&trillian.LogLeaf{
-						LeafValue: secondLeaf.Marshal()[1:],
-						LeafIndex: 2,
-					},
-				},
-			},
-			wantErr: true,
-		},
-		{
-			description: "valid",
-			req:         req,
-			rsp: &trillian.GetLeavesByRangeResponse{
-				Leaves: []*trillian.LogLeaf{
-					&trillian.LogLeaf{
-						LeafValue: firstLeaf.Marshal(),
-						LeafIndex: 1,
-					},
-					&trillian.LogLeaf{
-						LeafValue: secondLeaf.Marshal(),
-						LeafIndex: 2,
-					},
-				},
-			},
-			wantLeaves: &types.LeafList{
-				firstLeaf,
-				secondLeaf,
-			},
-		},
-	} {
-		// Run deferred functions at the end of each iteration
-		func() {
-			ctrl := gomock.NewController(t)
-			defer ctrl.Finish()
-			grpc := mocks.NewMockTrillianLogClient(ctrl)
-			grpc.EXPECT().GetLeavesByRange(gomock.Any(), gomock.Any()).Return(table.rsp, table.err)
-			client := TrillianClient{GRPC: grpc}
-
-			leaves, err := client.GetLeaves(context.Background(), table.req)
-			if got, want := err != nil, table.wantErr; got != want {
-				t.Errorf("got error %v but wanted %v in test %q: %v", got, want, table.description, err)
-			}
-			if err != nil {
-				return
-			}
-			if got, want := leaves, table.wantLeaves; !reflect.DeepEqual(got, want) {
-				t.Errorf("got leaves\n\t%v\nbut wanted\n\t%v\nin test %q", got, want, table.description)
-			}
-		}()
-	}
-}
diff --git a/pkg/trillian/util.go b/pkg/trillian/util.go
deleted file mode 100644
index fbd0aea..0000000
--- a/pkg/trillian/util.go
+++ /dev/null
@@ -1,33 +0,0 @@
-package trillian
-
-import (
-	"fmt"
-
-	trillian "github.com/google/trillian/types"
-	sigsum "git.sigsum.org/sigsum-log-go/pkg/types"
-)
-
-func treeHeadFromLogRoot(lr *trillian.LogRootV1) *sigsum.TreeHead {
-	var hash [sigsum.HashSize]byte
-	th := sigsum.TreeHead{
-		Timestamp: uint64(lr.TimestampNanos / 1000 / 1000 / 1000),
-		TreeSize:  uint64(lr.TreeSize),
-		RootHash:  &hash,
-	}
-	copy(th.RootHash[:], lr.RootHash)
-	return &th
-}
-
-func nodePathFromHashes(hashes [][]byte) ([]*[sigsum.HashSize]byte, error) {
-	var path []*[sigsum.HashSize]byte
-	for _, hash := range hashes {
-		if len(hash) != sigsum.HashSize {
-			return nil, fmt.Errorf("unexpected hash length: %v", len(hash))
-		}
-
-		var h [sigsum.HashSize]byte
-		copy(h[:], hash)
-		path = append(path, &h)
-	}
-	return path, nil
-}