|
| 1 | +package blob |
| 2 | + |
| 3 | +import ( |
| 4 | + "net/http" |
| 5 | + "net/url" |
| 6 | + "strconv" |
| 7 | + "strings" |
| 8 | + |
| 9 | + "github.com/ethereum/go-ethereum/common/hexutil" |
| 10 | + "github.com/pkg/errors" |
| 11 | + "github.com/prysmaticlabs/prysm/v4/beacon-chain/rpc/eth/helpers" |
| 12 | + "github.com/prysmaticlabs/prysm/v4/beacon-chain/rpc/lookup" |
| 13 | + field_params "github.com/prysmaticlabs/prysm/v4/config/fieldparams" |
| 14 | + "github.com/prysmaticlabs/prysm/v4/config/params" |
| 15 | + "github.com/prysmaticlabs/prysm/v4/consensus-types/primitives" |
| 16 | + "github.com/prysmaticlabs/prysm/v4/encoding/bytesutil" |
| 17 | + "github.com/prysmaticlabs/prysm/v4/network" |
| 18 | + eth "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1" |
| 19 | + "github.com/prysmaticlabs/prysm/v4/time/slots" |
| 20 | +) |
| 21 | + |
| 22 | +// Blobs is an HTTP handler for Beacon API getBlobs. |
| 23 | +func (s *Server) Blobs(w http.ResponseWriter, r *http.Request) { |
| 24 | + var sidecars []*eth.BlobSidecar |
| 25 | + var root []byte |
| 26 | + |
| 27 | + indices := parseIndices(r.URL) |
| 28 | + segments := strings.Split(r.URL.Path, "/") |
| 29 | + blockId := segments[len(segments)-1] |
| 30 | + switch blockId { |
| 31 | + case "genesis": |
| 32 | + errJson := &network.DefaultErrorJson{ |
| 33 | + Message: "blobs are not supported for Phase 0 fork", |
| 34 | + Code: http.StatusBadRequest, |
| 35 | + } |
| 36 | + network.WriteError(w, errJson) |
| 37 | + return |
| 38 | + case "head": |
| 39 | + var err error |
| 40 | + root, err = s.ChainInfoFetcher.HeadRoot(r.Context()) |
| 41 | + if err != nil { |
| 42 | + errJson := &network.DefaultErrorJson{ |
| 43 | + Message: errors.Wrapf(err, "could not retrieve head root").Error(), |
| 44 | + Code: http.StatusInternalServerError, |
| 45 | + } |
| 46 | + network.WriteError(w, errJson) |
| 47 | + return |
| 48 | + } |
| 49 | + case "finalized": |
| 50 | + fcp := s.ChainInfoFetcher.FinalizedCheckpt() |
| 51 | + if fcp == nil { |
| 52 | + errJson := &network.DefaultErrorJson{ |
| 53 | + Message: "received nil finalized checkpoint", |
| 54 | + Code: http.StatusInternalServerError, |
| 55 | + } |
| 56 | + network.WriteError(w, errJson) |
| 57 | + return |
| 58 | + } |
| 59 | + root = fcp.Root |
| 60 | + case "justified": |
| 61 | + jcp := s.ChainInfoFetcher.CurrentJustifiedCheckpt() |
| 62 | + if jcp == nil { |
| 63 | + errJson := &network.DefaultErrorJson{ |
| 64 | + Message: "received nil justified checkpoint", |
| 65 | + Code: http.StatusInternalServerError, |
| 66 | + } |
| 67 | + network.WriteError(w, errJson) |
| 68 | + return |
| 69 | + } |
| 70 | + root = jcp.Root |
| 71 | + default: |
| 72 | + if bytesutil.IsHex([]byte(blockId)) { |
| 73 | + var err error |
| 74 | + root, err = hexutil.Decode(blockId) |
| 75 | + if err != nil { |
| 76 | + errJson := &network.DefaultErrorJson{ |
| 77 | + Message: errors.Wrap(err, "could not decode block ID into hex").Error(), |
| 78 | + Code: http.StatusInternalServerError, |
| 79 | + } |
| 80 | + network.WriteError(w, errJson) |
| 81 | + return |
| 82 | + } |
| 83 | + } else { |
| 84 | + slot, err := strconv.ParseUint(blockId, 10, 64) |
| 85 | + if err != nil { |
| 86 | + errJson := &network.DefaultErrorJson{ |
| 87 | + Message: lookup.NewBlockIdParseError(err).Error(), |
| 88 | + Code: http.StatusBadRequest, |
| 89 | + } |
| 90 | + network.WriteError(w, errJson) |
| 91 | + return |
| 92 | + } |
| 93 | + denebStart, err := slots.EpochStart(params.BeaconConfig().DenebForkEpoch) |
| 94 | + if err != nil { |
| 95 | + errJson := &network.DefaultErrorJson{ |
| 96 | + Message: errors.Wrap(err, "could not calculate Deneb start slot").Error(), |
| 97 | + Code: http.StatusInternalServerError, |
| 98 | + } |
| 99 | + network.WriteError(w, errJson) |
| 100 | + return |
| 101 | + } |
| 102 | + if primitives.Slot(slot) < denebStart { |
| 103 | + errJson := &network.DefaultErrorJson{ |
| 104 | + Message: "blobs are not supported before Deneb fork", |
| 105 | + Code: http.StatusBadRequest, |
| 106 | + } |
| 107 | + network.WriteError(w, errJson) |
| 108 | + return |
| 109 | + } |
| 110 | + sidecars, err = s.BeaconDB.BlobSidecarsBySlot(r.Context(), primitives.Slot(slot), indices...) |
| 111 | + if err != nil { |
| 112 | + errJson := &network.DefaultErrorJson{ |
| 113 | + Message: errors.Wrapf(err, "could not retrieve blobs for slot %d", slot).Error(), |
| 114 | + Code: http.StatusInternalServerError, |
| 115 | + } |
| 116 | + network.WriteError(w, errJson) |
| 117 | + return |
| 118 | + } |
| 119 | + network.WriteJson(w, buildSidecardsResponse(sidecars)) |
| 120 | + return |
| 121 | + } |
| 122 | + } |
| 123 | + |
| 124 | + var err error |
| 125 | + sidecars, err = s.BeaconDB.BlobSidecarsByRoot(r.Context(), bytesutil.ToBytes32(root), indices...) |
| 126 | + if err != nil { |
| 127 | + errJson := &network.DefaultErrorJson{ |
| 128 | + Message: errors.Wrapf(err, "could not retrieve blobs for root %#x", root).Error(), |
| 129 | + Code: http.StatusInternalServerError, |
| 130 | + } |
| 131 | + network.WriteError(w, errJson) |
| 132 | + return |
| 133 | + } |
| 134 | + network.WriteJson(w, buildSidecardsResponse(sidecars)) |
| 135 | +} |
| 136 | + |
| 137 | +// parseIndices filters out invalid and duplicate blob indices |
| 138 | +func parseIndices(url *url.URL) []uint64 { |
| 139 | + query := url.Query() |
| 140 | + helpers.NormalizeQueryValues(query) |
| 141 | + rawIndices := query["indices"] |
| 142 | + indices := make([]uint64, 0, field_params.MaxBlobsPerBlock) |
| 143 | +loop: |
| 144 | + for _, raw := range rawIndices { |
| 145 | + ix, err := strconv.ParseUint(raw, 10, 64) |
| 146 | + if err != nil { |
| 147 | + continue |
| 148 | + } |
| 149 | + for i := range indices { |
| 150 | + if ix == indices[i] || ix >= field_params.MaxBlobsPerBlock { |
| 151 | + continue loop |
| 152 | + } |
| 153 | + } |
| 154 | + indices = append(indices, ix) |
| 155 | + } |
| 156 | + return indices |
| 157 | +} |
| 158 | + |
| 159 | +func buildSidecardsResponse(sidecars []*eth.BlobSidecar) *SidecarsResponse { |
| 160 | + resp := &SidecarsResponse{Data: make([]*Sidecar, len(sidecars))} |
| 161 | + for i, sc := range sidecars { |
| 162 | + resp.Data[i] = &Sidecar{ |
| 163 | + BlockRoot: hexutil.Encode(sc.BlockRoot), |
| 164 | + Index: strconv.FormatUint(sc.Index, 10), |
| 165 | + Slot: strconv.FormatUint(uint64(sc.Slot), 10), |
| 166 | + BlockParentRoot: hexutil.Encode(sc.BlockParentRoot), |
| 167 | + ProposerIndex: strconv.FormatUint(uint64(sc.ProposerIndex), 10), |
| 168 | + Blob: hexutil.Encode(sc.Blob), |
| 169 | + KZGCommitment: hexutil.Encode(sc.KzgCommitment), |
| 170 | + KZGProof: hexutil.Encode(sc.KzgProof), |
| 171 | + } |
| 172 | + } |
| 173 | + return resp |
| 174 | +} |
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