fix(share): tendermint compatible get range result json marshall

nodebuilder/share/share.go

@@ -2,7 +2,9 @@ package share
 
 import (
 	"context"
+	"encoding/json"
 
+	tmjson "github.com/tendermint/tendermint/libs/json"
 	"github.com/tendermint/tendermint/types"
 
 	libshare "github.com/celestiaorg/go-square/v2/share"
@@ -23,6 +25,44 @@ type GetRangeResult struct {
 	Proof  *types.ShareProof
 }
 
+// MarshalJSON marshals an GetRangeResult to JSON. Uses tendermint encoder for proof for compatibility.
+func (getRangeResult *GetRangeResult) MarshalJSON() ([]byte, error) {
+	type Alias GetRangeResult
+	proof, err := tmjson.Marshal(getRangeResult.Proof)
+	if err != nil {
+		return nil, err
+	}
+	return json.Marshal(&struct {
+		Proof json.RawMessage `json:"Proof"`
+		*Alias
+	}{
+		Proof: proof,
+		Alias: (*Alias)(getRangeResult),
+	})
+}
+
+// UnmarshalJSON unmarshals an GetRangeResult from JSON. Uses tendermint decoder for proof for compatibility.
+func (getRangeResult *GetRangeResult) UnmarshalJSON(data []byte) error {
+	type Alias GetRangeResult
+	aux := &struct {
+		Proof json.RawMessage `json:"Proof"`
+		*Alias
+	}{
+		Alias: (*Alias)(getRangeResult),
+	}
+	if err := json.Unmarshal(data, &aux); err != nil {
+		return err
+	}
+	proof := new(types.ShareProof)
+	if err := tmjson.Unmarshal(aux.Proof, proof); err != nil {
+		return err
+	}
+
+	getRangeResult.Proof = proof
+
+	return nil
+}
+
 // Module provides access to any data square or block share on the network.
 //
 // All Get methods provided on Module follow the following flow: