From a7f212c4f24edb538fce7f958bc24ce96cd03b5b Mon Sep 17 00:00:00 2001
From: CalDescent <caldescent@protonmail.com>
Date: Sat, 9 Oct 2021 16:57:19 +0100
Subject: [PATCH] Create a .sha256 file to accompany each bootstrap

This can ultimately be validated after download, and can also be used to help coordinate updates on the various bootstrap hosts.
---
 src/main/java/org/qortal/repository/Bootstrap.java | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/main/java/org/qortal/repository/Bootstrap.java b/src/main/java/org/qortal/repository/Bootstrap.java
index ec05812b..3d16dc4c 100644
--- a/src/main/java/org/qortal/repository/Bootstrap.java
+++ b/src/main/java/org/qortal/repository/Bootstrap.java
@@ -5,6 +5,7 @@ import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.qortal.block.BlockChain;
 import org.qortal.controller.Controller;
+import org.qortal.crypto.Crypto;
 import org.qortal.data.account.MintingAccountData;
 import org.qortal.data.block.BlockData;
 import org.qortal.data.crosschain.TradeBotData;
@@ -16,6 +17,7 @@ import org.qortal.utils.NTP;
 import org.qortal.utils.SevenZ;
 
 import java.io.BufferedInputStream;
+import java.io.File;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.net.HttpURLConnection;
@@ -272,6 +274,11 @@ public class Bootstrap {
             LOGGER.info("Compressing...");
             SevenZ.compress(compressedOutputPath.toString(), outputPath.toFile());
 
+            LOGGER.info("Generating checksum file...");
+            String checksum = Crypto.digestHexString(compressedOutputPath.toFile(), 1024*1024);
+            Path checksumPath = Paths.get(String.format("%s.sha256", compressedOutputPath.toString()));
+            Files.writeString(checksumPath, checksum, StandardOpenOption.CREATE);
+
             // Return the path to the compressed bootstrap file
             LOGGER.info("Bootstrap creation complete. Output file: {}", compressedOutputPath.toAbsolutePath().toString());
             return compressedOutputPath.toAbsolutePath().toString();