1 files changed, 19 insertions, 3 deletions
diff --git a/plugin/evm/static_service.go b/plugin/evm/static_service.go
index 1e48734..7b0fa8b 100644
--- a/plugin/evm/static_service.go
+++ b/plugin/evm/static_service.go
@@ -7,16 +7,32 @@ import (
 	"context"
 	"encoding/json"
 
-	"github.com/ava-labs/coreth/core"
 	"github.com/ava-labs/avalanchego/utils/formatting"
+	"github.com/ava-labs/coreth/core"
 )
 
 // StaticService defines the static API services exposed by the evm
 type StaticService struct{}
 
+// BuildGenesisReply is the reply from BuildGenesis
+type BuildGenesisReply struct {
+	Bytes    string              `json:"bytes"`
+	Encoding formatting.Encoding `json:"encoding"`
+}
+
 // BuildGenesis returns the UTXOs such that at least one address in [args.Addresses] is
 // referenced in the UTXO.
-func (*StaticService) BuildGenesis(_ context.Context, args *core.Genesis) (formatting.CB58, error) {
+func (*StaticService) BuildGenesis(_ context.Context, args *core.Genesis) (*BuildGenesisReply, error) {
 	bytes, err := json.Marshal(args)
-	return formatting.CB58{Bytes: bytes}, err
+	if err != nil {
+		return nil, err
+	}
+	bytesStr, err := formatting.Encode(formatting.Hex, bytes)
+	if err != nil {
+		return nil, err
+	}
+	return &BuildGenesisReply{
+		Bytes:    bytesStr,
+		Encoding: formatting.Hex,
+	}, nil
 }