Add blobs bundle and related types

api/deneb/blindedblobsbundle.go

@@ -0,0 +1,38 @@
+// Copyright © 2023 Attestant Limited.
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package deneb
+
+import (
+	"fmt"
+
+	"github.com/attestantio/go-eth2-client/spec/deneb"
+	"github.com/attestantio/go-eth2-client/spec/phase0"
+	"github.com/goccy/go-yaml"
+)
+
+// BlindedBlobsBundle is the structure used to store the blobs bundle.
+type BlindedBlobsBundle struct {
+	Commitments []deneb.KzgCommitment `ssz-max:"6" ssz-size:"?,48"`
+	Proofs      []deneb.KzgProof      `ssz-max:"6" ssz-size:"?,48"`
+	BlobRoots   []phase0.Root         `ssz-max:"6" ssz-size:"?,32"`
+}
+
+// String returns a string version of the structure.
+func (b *BlindedBlobsBundle) String() string {
+	data, err := yaml.Marshal(b)
+	if err != nil {
+		return fmt.Sprintf("ERR: %v", err)
+	}
+	return string(data)
+}

api/deneb/blindedblobsbundle_json.go

@@ -0,0 +1,74 @@
+// Copyright © 2023 Attestant Limited.
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package deneb
+
+import (
+	"encoding/json"
+
+	"github.com/attestantio/go-eth2-client/codecs"
+	"github.com/pkg/errors"
+)
+
+// blindedBlobsBundleJSON is the spec representation of the struct.
+type blindedBlobsBundleJSON struct {
+	Commitments []string `json:"commitments"`
+	Proofs      []string `json:"proofs"`
+	BlobRoots   []string `json:"blob_roots"`
+}
+
+// MarshalJSON implements json.Marshaler.
+func (b *BlindedBlobsBundle) MarshalJSON() ([]byte, error) {
+	blobKzgCommitments := make([]string, len(b.Commitments))
+	for i := range b.Commitments {
+		blobKzgCommitments[i] = b.Commitments[i].String()
+	}
+
+	blobKzgProofs := make([]string, len(b.Proofs))
+	for i := range b.Proofs {
+		blobKzgProofs[i] = b.Proofs[i].String()
+	}
+
+	blobRoots := make([]string, len(b.BlobRoots))
+	for i := range b.BlobRoots {
+		blobRoots[i] = b.BlobRoots[i].String()
+	}
+
+	return json.Marshal(&blindedBlobsBundleJSON{
+		Commitments: blobKzgCommitments,
+		Proofs:      blobKzgProofs,
+		BlobRoots:   blobRoots,
+	})
+}
+
+// UnmarshalJSON implements json.Unmarshaler.
+func (b *BlindedBlobsBundle) UnmarshalJSON(input []byte) error {
+	raw, err := codecs.RawJSON(&blindedBlobsBundleJSON{}, input)
+	if err != nil {
+		return err
+	}
+
+	if err := json.Unmarshal(raw["commitments"], &b.Commitments); err != nil {
+		return errors.Wrap(err, "commitments")
+	}
+
+	if err := json.Unmarshal(raw["proofs"], &b.Proofs); err != nil {
+		return errors.Wrap(err, "proofs")
+	}
+
+	if err := json.Unmarshal(raw["blob_roots"], &b.BlobRoots); err != nil {
+		return errors.Wrap(err, "blob_roots")
+	}
+
+	return nil
+}