From 031657878ec26ad731cbe9d402390482fba993bb Mon Sep 17 00:00:00 2001
From: catbref <misc-github@talk2dom.com>
Date: Fri, 29 Mar 2019 10:56:46 +0000
Subject: [PATCH] Added safety feature to prevent negative balances

---
 src/main/java/org/qora/account/Account.java | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/main/java/org/qora/account/Account.java b/src/main/java/org/qora/account/Account.java
index a3b64f54..d907629e 100644
--- a/src/main/java/org/qora/account/Account.java
+++ b/src/main/java/org/qora/account/Account.java
@@ -130,6 +130,13 @@ public class Account {
 	}
 
 	public void setConfirmedBalance(long assetId, BigDecimal balance) throws DataException {
+		// Safety feature!
+		if (balance.compareTo(BigDecimal.ZERO) < 0) {
+			String message = String.format("Refusing to set negative balance %s [assetId %d] for %s", balance.toPlainString(), assetId, this.address);
+			LOGGER.error(message);
+			throw new DataException(message);
+		}
+
 		// Can't have a balance without an account - make sure it exists!
 		this.repository.getAccountRepository().ensureAccount(this.buildAccountData());