From d5d0479671979ad7e5c64a7eac3ed13d7a8888c7 Mon Sep 17 00:00:00 2001
From: Roman Khimov <roman@nspcc.ru>
Date: Mon, 16 Mar 2020 18:43:02 +0300
Subject: [PATCH] core: verify results of issue transaction

It shouldn't try to issue more tokens than there is available.
---
 pkg/core/blockchain.go | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/pkg/core/blockchain.go b/pkg/core/blockchain.go
index 85a439d67..e5a7a5519 100644
--- a/pkg/core/blockchain.go
+++ b/pkg/core/blockchain.go
@@ -1660,6 +1660,13 @@ func (bc *Blockchain) verifyResults(t *transaction.Transaction, results []*trans
 			if r.AssetID == UtilityTokenID() {
 				return errors.New("issue tx issues utility tokens")
 			}
+			asset, err := bc.dao.GetAssetState(r.AssetID)
+			if asset == nil || err != nil {
+				return errors.New("invalid asset in issue tx")
+			}
+			if asset.Available < r.Amount {
+				return errors.New("trying to issue more than available")
+			}
 		}
 		break
 	default: