add signature parameter retrieval to graphql interface

graphql/graphql.go

@@ -314,6 +314,33 @@ func (t *Transaction) Logs(ctx context.Context) (*[]*Log, error) {
 	return &ret, nil
 }
 
+func (t *Transaction) R(ctx context.Context) (hexutil.Big, error){
+	tx, err:= t.resolve(ctx)
+	if err!= nil || tx == nil{
+		return hexutil.Big{}, err
+	}
+	r,_,_ := tx.RawSignatureValues()
+	return hexutil.Big(*r),nil
+}
+
+
+func (t *Transaction) S(ctx context.Context) (hexutil.Big, error){
+        tx, err:= t.resolve(ctx)
+        if err!= nil || tx == nil{
+                return hexutil.Big{}, err
+        }
+        _,s,_ := tx.RawSignatureValues()
+        return hexutil.Big(*s),nil
+}
+
+func (t *Transaction) V(ctx context.Context) (hexutil.Big, error){
+        tx, err:= t.resolve(ctx)
+        if err!= nil || tx == nil{
+                return hexutil.Big{}, err
+        }
+        _,_,v := tx.RawSignatureValues()
+        return hexutil.Big(*v),nil
+}
 type BlockType int
 
 // Block represents an Ethereum block.

graphql/schema.go

@@ -115,6 +115,9 @@ const schema string = `
         # Logs is a list of log entries emitted by this transaction. If the
         # transaction has not yet been mined, this field will be null.
         logs: [Log!]
+	r: BigInt!
+	s: BigInt!
+	v: BigInt!
     }
 
     # BlockFilterCriteria encapsulates log filter criteria for a filter applied