added DB api

rpc/api/db_args.go

@@ -0,0 +1,110 @@
+package api
+
+import (
+	"encoding/json"
+
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/rpc/shared"
+)
+
+type DbArgs struct {
+	Database string
+	Key      string
+	Value    []byte
+}
+
+func (args *DbArgs) UnmarshalJSON(b []byte) (err error) {
+	var obj []interface{}
+	if err := json.Unmarshal(b, &obj); err != nil {
+		return shared.NewDecodeParamError(err.Error())
+	}
+
+	if len(obj) < 2 {
+		return shared.NewInsufficientParamsError(len(obj), 2)
+	}
+
+	var objstr string
+	var ok bool
+
+	if objstr, ok = obj[0].(string); !ok {
+		return shared.NewInvalidTypeError("database", "not a string")
+	}
+	args.Database = objstr
+
+	if objstr, ok = obj[1].(string); !ok {
+		return shared.NewInvalidTypeError("key", "not a string")
+	}
+	args.Key = objstr
+
+	if len(obj) > 2 {
+		objstr, ok = obj[2].(string)
+		if !ok {
+			return shared.NewInvalidTypeError("value", "not a string")
+		}
+
+		args.Value = []byte(objstr)
+	}
+
+	return nil
+}
+
+func (a *DbArgs) requirements() error {
+	if len(a.Database) == 0 {
+		return shared.NewValidationError("Database", "cannot be blank")
+	}
+	if len(a.Key) == 0 {
+		return shared.NewValidationError("Key", "cannot be blank")
+	}
+	return nil
+}
+
+type DbHexArgs struct {
+	Database string
+	Key      string
+	Value    []byte
+}
+
+func (args *DbHexArgs) UnmarshalJSON(b []byte) (err error) {
+	var obj []interface{}
+	if err := json.Unmarshal(b, &obj); err != nil {
+		return shared.NewDecodeParamError(err.Error())
+	}
+
+	if len(obj) < 2 {
+		return shared.NewInsufficientParamsError(len(obj), 2)
+	}
+
+	var objstr string
+	var ok bool
+
+	if objstr, ok = obj[0].(string); !ok {
+		return shared.NewInvalidTypeError("database", "not a string")
+	}
+	args.Database = objstr
+
+	if objstr, ok = obj[1].(string); !ok {
+		return shared.NewInvalidTypeError("key", "not a string")
+	}
+	args.Key = objstr
+
+	if len(obj) > 2 {
+		objstr, ok = obj[2].(string)
+		if !ok {
+			return shared.NewInvalidTypeError("value", "not a string")
+		}
+
+		args.Value = common.FromHex(objstr)
+	}
+
+	return nil
+}
+
+func (a *DbHexArgs) requirements() error {
+	if len(a.Database) == 0 {
+		return shared.NewValidationError("Database", "cannot be blank")
+	}
+	if len(a.Key) == 0 {
+		return shared.NewValidationError("Key", "cannot be blank")
+	}
+	return nil
+}