From 02a50e6909b71e3cd9cf3606207910046c0303f0 Mon Sep 17 00:00:00 2001
From: ilya-korotya <officalbatya@gmail.com>
Date: Thu, 12 May 2022 14:43:10 +0300
Subject: [PATCH] parse subject position

---
 json-ld/parser.go | 11 ++++++++++-
 json/parser.go    | 10 +++++++++-
 utils/claims.go   |  7 +++++++
 3 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/json-ld/parser.go b/json-ld/parser.go
index e3d2828..75174e9 100644
--- a/json-ld/parser.go
+++ b/json-ld/parser.go
@@ -95,7 +95,16 @@ func (p Parser) ParseClaim(credential *verifiable.Iden3Credential, schemaBytes [
 		if err != nil {
 			return nil, err
 		}
-		claim.SetIndexID(id)
+
+		switch credential.SubjectPosition {
+		case "", utils.SubjectPositionIndex:
+			claim.SetIndexID(id)
+		case utils.SubjectPositionValue:
+			claim.SetValueID(id)
+		default:
+			return nil, errors.New("unknown subject position")
+		}
+
 	}
 
 	return claim, nil
diff --git a/json/parser.go b/json/parser.go
index fc80a67..dc5ede7 100644
--- a/json/parser.go
+++ b/json/parser.go
@@ -64,7 +64,15 @@ func (s Parser) ParseClaim(credential *verifiable.Iden3Credential, schemaBytes [
 		if err != nil {
 			return nil, err
 		}
-		claim.SetIndexID(id)
+
+		switch credential.SubjectPosition {
+		case "", utils.SubjectPositionIndex:
+			claim.SetIndexID(id)
+		case utils.SubjectPositionValue:
+			claim.SetValueID(id)
+		default:
+			return nil, errors.New("unknown subject position")
+		}
 	}
 
 	return claim, nil
diff --git a/utils/claims.go b/utils/claims.go
index e1b6c1b..9c19fb1 100644
--- a/utils/claims.go
+++ b/utils/claims.go
@@ -11,6 +11,13 @@ import (
 	"github.com/pkg/errors"
 )
 
+const (
+	// SubjectPositionIndex save subject in index part of claim. By default.
+	SubjectPositionIndex = "index"
+	// SubjectPositionValue save subject in value part of claim.
+	SubjectPositionValue = "value"
+)
+
 var q *big.Int
 
 //nolint //reason - needed