celenium-io · k-karuna · Dec 5, 2024 · Nov 15, 2024 · Nov 29, 2024 · Nov 29, 2024
diff --git a/cmd/api/handler/namespace.go b/cmd/api/handler/namespace.go
@@ -7,16 +7,21 @@ import (
 	"context"
 	"encoding/base64"
 	"encoding/hex"
+	"github.com/celestiaorg/celestia-app/v3/pkg/appconsts"
+	"github.com/celestiaorg/celestia-app/v3/pkg/da"
+	"github.com/celestiaorg/go-square/v2/share"
 	"net/http"
 	"time"
 
 	"github.com/celenium-io/celestia-indexer/pkg/types"
+	"github.com/celestiaorg/go-square/v2"
 	sdk "github.com/dipdup-net/indexer-sdk/pkg/storage"
 
 	"github.com/celenium-io/celestia-indexer/cmd/api/handler/responses"
 	"github.com/celenium-io/celestia-indexer/internal/storage"
 	testsuite "github.com/celenium-io/celestia-indexer/internal/test_suite"
 	"github.com/celenium-io/celestia-indexer/pkg/node"
+	"github.com/celestiaorg/celestia-app/v3/pkg/proof"
 	"github.com/labstack/echo/v4"
 )
 
@@ -27,6 +32,7 @@ type NamespaceHandler struct {
 	address     storage.IAddress
 	blob        node.DalApi
 	state       storage.IState
+	node        node.Api
 	indexerName string
 }
 
@@ -38,6 +44,7 @@ func NewNamespaceHandler(
 	state storage.IState,
 	indexerName string,
 	blob node.DalApi,
+	node node.Api,
 ) *NamespaceHandler {
 	return &NamespaceHandler{
 		namespace:   namespace,
@@ -47,6 +54,7 @@ func NewNamespaceHandler(
 		blob:        blob,
 		state:       state,
 		indexerName: indexerName,
+		node:        node,
 	}
 }
 
@@ -733,3 +741,68 @@ func (handler *NamespaceHandler) Rollups(c echo.Context) error {
 
 	return returnArray(c, response)
 }
+
+// BlobProofs godoc
+//
+//	@Summary		Get blob inclusion proofs
+//	@Description	Returns blob inclusion proofs
+//	@Tags			namespace
+//	@ID				get-blob-proof
+//	@Param			request	body postBlobRequest	true "Request body containing height, commitment and namespace hash"
+//	@Accept			json
+//	@Produce		json
+//	@Success		200	{object}	responses.BlobLog
+//	@Failure		400	{object}	Error
+//	@Router			/blob/proofs [get]
+func (handler *NamespaceHandler) BlobProofs(c echo.Context) error {
+	req, err := bindAndValidate[postBlobRequest](c)
+	if err != nil {
+		return badRequestError(c, err)
+	}
+
+	block, err := handler.node.Block(c.Request().Context(), req.Height)
+	if err != nil {
+		return handleError(c, err, handler.namespace)
+	}
+
+	dataSquare, err := square.Construct(
+		block.Block.Data.Txs.ToSliceOfBytes(),
+		appconsts.SquareSizeUpperBound(0),
+		appconsts.SubtreeRootThreshold(0),
+	)
+
+	if err != nil {
+		return internalServerError(c, err)
+	}
+
+	startBlobIndex, endBlobIndex, err := responses.GetBlobShareIndexes(dataSquare, req.Hash, req.Commitment)
+	if err != nil {
+		return internalServerError(c, err)
+	}
+	blobSharesRange := share.Range{
+		Start: startBlobIndex,
+		End:   endBlobIndex,
+	}
+
+	eds, err := da.ExtendShares(share.ToBytes(dataSquare))
+	if err != nil {
+		return internalServerError(c, err)
+	}
+
+	namespaceBytes, err := base64.StdEncoding.DecodeString(req.Hash)
+	if err != nil {
+		return internalServerError(c, err)
+	}
+
+	namespace, err := share.NewNamespaceFromBytes(namespaceBytes)
+	if err != nil {
+		return internalServerError(c, err)
+	}
+
+	proofs, err := proof.NewShareInclusionProofFromEDS(eds, namespace, blobSharesRange)
+	if err != nil {
+		return handleError(c, err, handler.namespace)
+	}
+
+	return c.JSON(http.StatusOK, proofs.ShareProofs)
+}
diff --git a/cmd/api/handler/namespace_test.go b/cmd/api/handler/namespace_test.go
@@ -9,6 +9,7 @@ import (
 	"crypto/rand"
 	"encoding/base64"
 	"encoding/json"
+	"github.com/celestiaorg/celestia-app/v3/pkg/proof"
 	"net/http"
 	"net/http/httptest"
 	"net/url"
@@ -25,6 +26,7 @@ import (
 	nodeTypes "github.com/celenium-io/celestia-indexer/pkg/node/types"
 	"github.com/labstack/echo/v4"
 	"github.com/stretchr/testify/suite"
+	tendermintTypes "github.com/tendermint/tendermint/types"
 	"go.uber.org/mock/gomock"
 )
 
@@ -40,6 +42,62 @@ var (
 	}
 	testNamespaceId     = "0000000000000000000000000000000000000000fc7443b155920156"
 	testNamespaceBase64 = "AAAAAAAAAAAAAAAAAAAAAAAAAAAA/HRDsVWSAVY="
+	testTxBytes         = []byte{
+		0xa, 0xcb, 0x2, 0xa, 0xa0, 0x1, 0xa, 0x9d, 0x1, 0xa, 0x20, 0x2f, 0x63, 0x65, 0x6c, 0x65, 0x73, 0x74, 0x69, 0x61,
+		0x2e, 0x62, 0x6c, 0x6f, 0x62, 0x2e, 0x76, 0x31, 0x2e, 0x4d, 0x73, 0x67, 0x50, 0x61, 0x79, 0x46, 0x6f, 0x72,
+		0x42, 0x6c, 0x6f, 0x62, 0x73, 0x12, 0x79, 0xa, 0x2f, 0x63, 0x65, 0x6c, 0x65, 0x73, 0x74, 0x69, 0x61, 0x31, 0x73,
+		0x73, 0x77, 0x7a, 0x77, 0x33, 0x6d, 0x74, 0x66, 0x75, 0x65, 0x38, 0x70, 0x7a, 0x79, 0x32, 0x79, 0x6d, 0x63,
+		0x37, 0x6a, 0x61, 0x78, 0x64, 0x30, 0x79, 0x72, 0x79, 0x37, 0x72, 0x6b, 0x76, 0x34, 0x34, 0x6e, 0x32, 0x75,
+		0x73, 0x12, 0x1d, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+		0x0, 0x0, 0x56, 0x49, 0x41, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1a, 0x2, 0xab, 0x5, 0x22, 0x20, 0x86, 0x8c, 0xd6, 0x1d,
+		0x4b, 0x1c, 0x90, 0xc5, 0xdd, 0x6, 0x10, 0x4e, 0xd7, 0x94, 0xcb, 0xae, 0x26, 0xf8, 0xac, 0xeb, 0x69, 0x80, 0xdb,
+		0xbf, 0x1f, 0x2b, 0xb6, 0xdb, 0x98, 0x23, 0x14, 0xb2, 0x42, 0x1, 0x0, 0x12, 0x64, 0xa, 0x4e, 0xa, 0x46, 0xa,
+		0x1f, 0x2f, 0x63, 0x6f, 0x73, 0x6d, 0x6f, 0x73, 0x2e, 0x63, 0x72, 0x79, 0x70, 0x74, 0x6f, 0x2e, 0x73, 0x65,
+		0x63, 0x70, 0x32, 0x35, 0x36, 0x6b, 0x31, 0x2e, 0x50, 0x75, 0x62, 0x4b, 0x65, 0x79, 0x12, 0x23, 0xa, 0x21, 0x2,
+		0x1e, 0x73, 0x47, 0xc3, 0x17, 0x85, 0x7d, 0xe, 0xa4, 0x47, 0x8f, 0x71, 0xb, 0x3, 0xbe, 0x97, 0x18, 0x84, 0x3,
+		0xee, 0x91, 0x88, 0xef, 0xfe, 0x89, 0x28, 0x2c, 0x27, 0x13, 0xdc, 0x84, 0x66, 0x12, 0x4, 0xa, 0x2, 0x8, 0x1,
+		0x12, 0x12, 0xa, 0xc, 0xa, 0x4, 0x75, 0x74, 0x69, 0x61, 0x12, 0x4, 0x39, 0x32, 0x32, 0x39, 0x10, 0xf9, 0xd0,
+		0x5, 0x1a, 0x40, 0xe7, 0x8d, 0x57, 0x47, 0xeb, 0x49, 0xd0, 0xd4, 0x5b, 0x14, 0x98, 0xa, 0xcd, 0xcb, 0xc3, 0x5c,
+		0x89, 0x88, 0xe1, 0x69, 0x4c, 0x2a, 0x64, 0x76, 0xb7, 0x74, 0x56, 0x3a, 0x81, 0x7a, 0x5c, 0x20, 0x51, 0x88,
+		0x37, 0x35, 0xc7, 0x22, 0xa8, 0x0, 0x30, 0x47, 0x91, 0xce, 0xf3, 0xba, 0xf1, 0x7f, 0xa, 0xed, 0xe1, 0xb4, 0x38,
+		0xce, 0xe8, 0x69, 0xe, 0x74, 0xcf, 0x24, 0x86, 0xbf, 0x7, 0x48, 0x12, 0xcc, 0x5, 0xa, 0x1c, 0x0, 0x0, 0x0, 0x0,
+		0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x56, 0x49, 0x41, 0x0, 0x0, 0x0,
+		0x0, 0x0, 0x12, 0xab, 0x5, 0x0, 0x0, 0x0, 0x1, 0x0, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+		0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x80, 0x1, 0x1, 0x16, 0x96, 0xe5, 0xba, 0x4e, 0x9a, 0x5, 0x5a,
+		0xaf, 0xe8, 0x86, 0x47, 0xaf, 0xe3, 0xa1, 0x38, 0x90, 0x65, 0x40, 0x54, 0x8f, 0xba, 0xc9, 0x3a, 0x5a, 0x7f,
+		0xdf, 0x97, 0xc6, 0x32, 0x57, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+		0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+		0x0, 0x0, 0x1, 0x0, 0x2, 0x42, 0x4, 0x0, 0xc, 0x71, 0xe9, 0x17, 0x21, 0xf9, 0x91, 0x85, 0x76, 0xd7, 0x60, 0xf0,
+		0x2f, 0x3, 0xca, 0xc4, 0x7c, 0x6f, 0x40, 0x3, 0x31, 0x60, 0x31, 0x84, 0x8e, 0x3c, 0x1d, 0x99, 0xe6, 0xe8, 0x3a,
+		0x47, 0x43, 0x29, 0x2, 0x54, 0x39, 0xaa, 0xc0, 0x2d, 0x5a, 0x69, 0x62, 0xcc, 0xce, 0xe5, 0xd4, 0xad, 0xb4, 0x8a,
+		0x36, 0xbb, 0xbf, 0x44, 0x3a, 0x53, 0x17, 0x21, 0x48, 0x43, 0x81, 0x12, 0x59, 0x37, 0xf3, 0x0, 0x1a, 0xc5, 0xff,
+		0x87, 0x5b, 0x19, 0x28, 0x7b, 0x98, 0x8d, 0x61, 0x7e, 0xc0, 0x5a, 0xcb, 0xbf, 0x5f, 0xe2, 0x45, 0x29, 0xa6,
+		0x4b, 0x23, 0x85, 0xa9, 0x6a, 0xad, 0x43, 0xf0, 0x9b, 0xe1, 0xad, 0xa9, 0x2c, 0x70, 0x40, 0x31, 0xdc, 0xc1,
+		0x48, 0x1b, 0x29, 0x2, 0x54, 0x11, 0x2f, 0x28, 0xa2, 0x54, 0x20, 0xc1, 0xd9, 0xd7, 0x5, 0x35, 0x8c, 0x13, 0x4c,
+		0xc6, 0x1, 0xd9, 0xd1, 0x84, 0xcb, 0x4d, 0xfd, 0xde, 0x7e, 0x1c, 0xac, 0x2b, 0xc3, 0xd4, 0xd3, 0x8b, 0xf9, 0xec,
+		0x44, 0xe6, 0x9, 0x64, 0x12, 0x3b, 0xaf, 0xc5, 0x86, 0xf7, 0x77, 0x64, 0x48, 0x8c, 0xd2, 0x4c, 0x6a, 0x77, 0x54,
+		0x6e, 0x5a, 0xf, 0xe8, 0xbd, 0xfb, 0x4f, 0xa2, 0x3, 0xcf, 0xaf, 0xfc, 0x36, 0xcc, 0xe4, 0xdd, 0x5b, 0x89, 0x1,
+		0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x67, 0x50, 0x70, 0x0, 0x8e, 0x7d, 0xd0, 0x6a, 0xc5,
+		0xb7, 0x3b, 0x47, 0x3b, 0xe6, 0xbc, 0x5a, 0x51, 0x3, 0xf, 0x4c, 0x74, 0x37, 0x65, 0x7c, 0xb7, 0xb2, 0x9b, 0xf3,
+		0x76, 0xc5, 0x64, 0xb8, 0xd1, 0x67, 0x5a, 0x5e, 0x89, 0x2, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+		0x0, 0x0, 0x67, 0x50, 0x70, 0x1, 0x4b, 0xa8, 0x4e, 0x1f, 0x37, 0xd0, 0x41, 0xbc, 0x6e, 0x55, 0xba, 0x39, 0x68,
+		0x26, 0xcc, 0x49, 0x4e, 0x84, 0xd4, 0x81, 0x5b, 0x6d, 0xb5, 0x26, 0x90, 0x42, 0x2e, 0xea, 0x73, 0x86, 0x31,
+		0x4f, 0x0, 0xe8, 0xe7, 0x76, 0x26, 0x58, 0x6f, 0x73, 0xb9, 0x55, 0x36, 0x4c, 0x7b, 0x4b, 0xbf, 0xb, 0xb7, 0xf7,
+		0x68, 0x5e, 0xbd, 0x40, 0xe8, 0x52, 0xb1, 0x64, 0x63, 0x3a, 0x4a, 0xcb, 0xd3, 0x24, 0x4c, 0x3d, 0xe2, 0x20,
+		0x2c, 0xcb, 0x62, 0x6a, 0xd3, 0x87, 0xd7, 0x7, 0x22, 0xe6, 0x4f, 0xbe, 0x44, 0x56, 0x2e, 0x2f, 0x23, 0x1a, 0x29,
+		0xc, 0x8, 0x53, 0x2b, 0x8d, 0x6a, 0xba, 0x40, 0x2f, 0xf5, 0x0, 0x96, 0xf9, 0x7a, 0x20, 0x84, 0x4a, 0x4f, 0xba,
+		0x58, 0x29, 0x5, 0x1, 0x37, 0xa, 0xa1, 0x44, 0xb7, 0x7d, 0x26, 0x25, 0x3a, 0x38, 0x4d, 0x27, 0x4a, 0xec, 0x57,
+		0x22, 0xce, 0x21, 0xf8, 0xf1, 0x79, 0x9, 0x35, 0x88, 0xd0, 0xe8, 0x47, 0xef, 0xa7, 0x3a, 0x10, 0xce, 0x20, 0xe4,
+		0x79, 0x9f, 0xb1, 0xe4, 0x66, 0x42, 0xd6, 0x56, 0x17, 0xc7, 0xe5, 0x21, 0x3f, 0xa0, 0x49, 0x89, 0xd9, 0x2d,
+		0x89, 0x2, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x67, 0x50, 0x70, 0x1, 0x87, 0xde, 0xd2,
+		0x47, 0xe1, 0x66, 0xf, 0x82, 0x70, 0x71, 0xc7, 0xf1, 0x37, 0x19, 0x34, 0x58, 0x97, 0x51, 0x8, 0x53, 0x84, 0xfc,
+		0x9f, 0x44, 0x62, 0xc1, 0xf1, 0x89, 0x7c, 0x5c, 0x3e, 0xef, 0x89, 0x1, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
+		0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x1, 0x86, 0x24, 0x81, 0x93, 0xeb, 0x4d, 0xd2, 0xa8, 0xce, 0x81, 0x5f, 0x87,
+		0x6c, 0x12, 0x4d, 0x48, 0x35, 0x95, 0x22, 0xf0, 0x85, 0x4d, 0x95, 0xd8, 0x7, 0x2e, 0xaf, 0xf0, 0xd3, 0x7d, 0x55,
+		0xbd, 0x11, 0x3, 0x20, 0x91, 0x1d, 0xd2, 0xad, 0x74, 0x3f, 0xf2, 0x37, 0xd4, 0x11, 0x64, 0x8a, 0xf, 0xe3, 0x2c,
+		0x6d, 0x74, 0xee, 0xc0, 0x60, 0x71, 0x6a, 0x2a, 0x74, 0x35, 0x2f, 0x6b, 0x1c, 0x43, 0x5b, 0x5d, 0x67, 0x0, 0xa8,
+		0xba, 0x1e, 0x76, 0xb4, 0xd8, 0x56, 0xb, 0xee, 0x8c, 0x3, 0x9c, 0x91, 0xd8, 0x8b, 0x48, 0x60, 0xca, 0xe7, 0x9b,
+		0x5, 0xd4, 0xb2, 0xd6, 0x56, 0xf0, 0xd3, 0x8d, 0x78, 0x56, 0xa2, 0xdd, 0x1a, 0x4, 0x42, 0x4c, 0x4f, 0x42}
 )
 
 // NamespaceTestSuite -
@@ -51,6 +109,7 @@ type NamespaceTestSuite struct {
 	address      *mock.MockIAddress
 	state        *mock.MockIState
 	blobReceiver *nodeMock.MockDalApi
+	node         *nodeMock.MockApi
 	echo         *echo.Echo
 	handler      *NamespaceHandler
 	ctrl         *gomock.Controller
@@ -67,7 +126,17 @@ func (s *NamespaceTestSuite) SetupSuite() {
 	s.rollups = mock.NewMockIRollup(s.ctrl)
 	s.state = mock.NewMockIState(s.ctrl)
 	s.blobReceiver = nodeMock.NewMockDalApi(s.ctrl)
-	s.handler = NewNamespaceHandler(s.namespaces, s.blobLogs, s.rollups, s.address, s.state, testIndexerName, s.blobReceiver)
+	s.node = nodeMock.NewMockApi(s.ctrl)
+	s.handler = NewNamespaceHandler(
+		s.namespaces,
+		s.blobLogs,
+		s.rollups,
+		s.address,
+		s.state,
+		testIndexerName,
+		s.blobReceiver,
+		s.node,
+	)
 }
 
 // TearDownSuite -
@@ -790,3 +859,63 @@ func (s *NamespaceTestSuite) TestBlobs() {
 	s.Require().EqualValues(testAddress, blob.Signer)
 	s.Require().EqualValues(testNamespace.Hash(), blob.Namespace)
 }
+
+func (s *NamespaceTestSuite) TestBlobProofs() {
+	commitment := "hozWHUsckMXdBhBO15TLrib4rOtpgNu/Hyu225gjFLI="
+	namespaceBase64 := "AAAAAAAAAAAAAAAAAAAAAAAAAAAAVklBAAAAAAA="
+	blockHeight := pkgTypes.Level(2892352)
+	txs := [][]byte{testTxBytes}
+
+	proofReq := map[string]any{
+		"hash":       namespaceBase64,
+		"height":     blockHeight,
+		"commitment": commitment,
+	}
+	stream := new(bytes.Buffer)
+	err := json.NewEncoder(stream).Encode(proofReq)
+	s.Require().NoError(err)
+
+	req := httptest.NewRequest(http.MethodPost, "/", stream)
+	rec := httptest.NewRecorder()
+	c := s.echo.NewContext(req, rec)
+	c.SetPath("/blob/proofs")
+
+	req.Header.Set(echo.HeaderContentType, echo.MIMEApplicationJSON)
+
+	s.node.EXPECT().
+		Block(gomock.Any(), blockHeight).
+		Return(pkgTypes.ResultBlock{
+			Block: &pkgTypes.Block{
+				Data: pkgTypes.Data{
+					Txs: tendermintTypes.ToTxs(txs),
+				},
+			},
+		}, nil)
+
+	s.Require().NoError(s.handler.BlobProofs(c))
+	s.Require().Equal(http.StatusOK, rec.Code)
+
+	var proofs []*proof.NMTProof
+	err = json.NewDecoder(rec.Body).Decode(&proofs)
+	s.Require().NoError(err)
+	s.Require().EqualValues(2, len(proofs))
+	s.Require().EqualValues(1, proofs[0].Start)
+	s.Require().EqualValues(2, proofs[0].End)
+	s.Require().EqualValues(1, proofs[1].End)
+	s.Require().EqualValues(
+		"AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABJKmGf0yBpvzj9FXhOZbyVHBq1LBKP5eI34r38GvSPZ9",
+		base64.StdEncoding.EncodeToString(proofs[0].Nodes[0]),
+	)
+	s.Require().EqualValues(
+		"/////////////////////////////////////////////////////////////////////////////55b1xq+xbf5Olhxqwf4N8vvgExxFkjtgX4j/uCbESK9",
+		base64.StdEncoding.EncodeToString(proofs[0].Nodes[1]),
+	)
+	s.Require().EqualValues(
+		"//////////////////////////////////////7//////////////////////////////////////plEqgR/c4IAVkNdYRWOYOAESD4whneKR54Dz5Dfe4p2",
+		base64.StdEncoding.EncodeToString(proofs[1].Nodes[0]),
+	)
+	s.Require().EqualValues(
+		"/////////////////////////////////////////////////////////////////////////////9DUGO+QswnUItJQnpHTEz6nj13KfN9iuS9pG2tYF5tI",
+		base64.StdEncoding.EncodeToString(proofs[1].Nodes[1]),
+	)
+}
diff --git a/cmd/api/handler/responses/ods.go b/cmd/api/handler/responses/ods.go
@@ -4,10 +4,17 @@
 package responses
 
 import (
+	"bytes"
 	"encoding/base64"
-
+	"github.com/celestiaorg/celestia-app/v3/pkg/appconsts"
 	"github.com/celestiaorg/go-square/namespace"
 	"github.com/celestiaorg/go-square/shares"
+	"github.com/celestiaorg/go-square/v2/inclusion"
+	"github.com/celestiaorg/go-square/v2/share"
+	"github.com/pkg/errors"
+	"github.com/tendermint/tendermint/crypto/merkle"
+
+	_ "github.com/celestiaorg/go-square/v2/share"
 	"github.com/celestiaorg/rsmt2d"
 )
 
@@ -88,3 +95,77 @@ func getNamespaceType(ns namespace.Namespace) NamespaceKind {
 		return DefaultNamespace
 	}
 }
+
+type sequence struct {
+	ns            share.Namespace
+	shareVersion  uint8
+	startShareIdx int
+	endShareIdx   int
+	data          []byte
+	sequenceLen   uint32
+	signer        []byte
+}
+
+func GetBlobShareIndexes(
+	shares []share.Share,
+	base64namespace string,
+	base64commitment string,
+) (blobStartIndex, blobEndIndex int, err error) {
+	if len(shares) == 0 {
+		return 0, 0, errors.New("invalid shares length")
+
+	}
+	sequences := make([]sequence, 0)
+	namespaceBytes, err := base64.StdEncoding.DecodeString(base64namespace)
+	if err != nil {
+		return 0, 0, errors.Wrap(err, "decoding base64 namespace")
+	}
+
+	for shareIndex, s := range shares {
+		if !(s.Version() <= 1) {
+			return 0, 0, errors.New("unsupported share version")
+		}
+
+		if s.IsPadding() {
+			continue
+		}
+
+		if !bytes.Equal(s.Namespace().Bytes(), namespaceBytes) {
+			continue
+		}
+
+		if s.IsSequenceStart() {
+			sequences = append(sequences, sequence{
+				ns:            s.Namespace(),
+				shareVersion:  s.Version(),
+				startShareIdx: shareIndex,
+				endShareIdx:   shareIndex,
+				data:          s.RawData(),
+				sequenceLen:   s.SequenceLen(),
+				signer:        share.GetSigner(s),
+			})
+		} else {
+			if len(sequences) == 0 {
+				return 0, 0, errors.New("continuation share without a s start share")
+			}
+			prev := &sequences[len(sequences)-1]
+			prev.data = append(prev.data, s.RawData()...)
+			prev.endShareIdx = shareIndex
+		}
+	}
+	for _, s := range sequences {
+		s.data = s.data[:s.sequenceLen]
+		blob, err := share.NewBlob(s.ns, s.data, s.shareVersion, s.signer)
+		if err != nil {
+			return 0, 0, errors.Wrap(err, "creating blob")
+		}
+		commitment, err := inclusion.CreateCommitment(blob, merkle.HashFromByteSlices, appconsts.SubtreeRootThreshold(0))
+		if err != nil {
+			return 0, 0, errors.Wrap(err, "creating commitment")
+		}
+		if base64.StdEncoding.EncodeToString(commitment) == base64commitment {
+			return s.startShareIdx, s.endShareIdx + 1, err
+		}
+	}
+	return 0, 0, err
+}