Changes for unstable consensus. (#272)

* Return empty hash when set or vector is empty in crypto.

* Changing <operator in sequence_hash struct.

* Fixing vm script and allowing only single sync target per vpath.

* Making vm cluster log level to debug.

* Increasing hpws max message size and fixing lcl mode in vm cluster scripts.

* lcl block fix.

src/comm/comm_server.hpp

@@ -10,7 +10,7 @@
 
 namespace comm
 {
-    constexpr uint32_t DEFAULT_MAX_MSG_SIZE = 4 * 1024 * 1024;
+    constexpr uint32_t DEFAULT_MAX_MSG_SIZE = 5 * 1024 * 1024;
     constexpr uint64_t DEFAULT_MAX_CONNECTIONS = 99999;
 
     template <typename T>

src/crypto.cpp

@@ -161,6 +161,11 @@ namespace crypto
         std::string hash;
         hash.resize(BLAKE3_OUT_LEN);
 
+        if (sw_vect.empty())
+        {
+            return hash;
+        }
+
         // Init stream hashing.
         blake3_hasher hasher;
         blake3_hasher_init(&hasher);
@@ -183,6 +188,11 @@ namespace crypto
         std::string hash;
         hash.resize(BLAKE3_OUT_LEN);
 
+        if (sw_set.empty())
+        {
+            return hash;
+        }
+
         // Init stream hashing.
         blake3_hasher hasher;
         blake3_hasher_init(&hasher);

src/p2p/p2p.hpp

@@ -45,7 +45,7 @@ namespace p2p
 
         bool operator<(const sequence_hash &seq_hash) const
         {
-            return seq_no < seq_hash.seq_no || hash < seq_hash.hash;
+            return (seq_no == seq_hash.seq_no) ? hash < seq_hash.hash : seq_no < seq_hash.seq_no;
         }
 
         const std::string to_string()

test/vm-cluster/cluster.sh

@@ -36,9 +36,9 @@ else
 fi
 
 contconfig=$(jq -r ".contracts[] | select(.name == \"${CONTRACT}\") | .config" $conf)
-if [ "$contconfig" = "" ]; then
+if [ "$contconfig" = "" ] || [ "$contconfig" = "{}" ]; then
     # Apply default config.
-    contconfig="{user: {'port': 8080 }, mesh:{ 'port': 22860}, 'contract': {'roundtime': 2000 }, 'log':{'loglevel': 'dbg', 'loggers':['console','file']}}"
+    contconfig="{\"user\": {\"port\": 8080}, \"mesh\":{ \"port\": 22860}, \"contract\": {\"roundtime\": 2000 }, \"log\":{\"loglevel\": \"dbg\", \"loggers\":[\"console\",\"file\"]}}"
 fi
 
 vmpass=$(jq -r '.vmpass' $conf)
@@ -237,11 +237,12 @@ if [ $mode = "ssl" ]; then
 fi
 
 if [ $mode = "lcl" ]; then
+    command="$contdir/lcl.sh"
     for (( i=0; i<$vmcount; i++ ))
     do
         vmaddr=${vmaddrs[i]}
         let nodeid=$i+1
-        echo "node$nodeid:" $(sshpass -p $vmpass ssh $vmuser@$vmaddr ls -v $contdir/hist | tail -1) &
+        echo "node"$nodeid":" $(sshpass -p $vmpass ssh $vmuser@$vmaddr $command) &
     done
     wait
     exit 0

test/vm-cluster/setup-hp.sh

@@ -13,6 +13,10 @@ then
    sudo swapon /swapfile  
 fi
 
+# Getting updates if any
+echo "Checking for updates..."
+sudo apt-get update
+
 if [ -x "$(command -v node)" ]; then
    echo "NodeJs already installed."
 else
@@ -33,6 +37,14 @@ else
    sudo cp $basedir/hpfiles/bin/fusermount3 /usr/local/bin/
 fi
 
+if [ -x "$(command -v sqlite3)" ]; then
+   echo "SQLite already installed."
+else
+   echo "Installing SQLite..."
+   sudo apt-get install -y sqlite3 libsqlite3-dev
+fi
+
+
 # Remove existing contract dir.
 sudo rm -r $contdir > /dev/null 2>&1
 
@@ -70,6 +82,11 @@ if [ $mode = "new" ] || [ $mode = "reconfig" ]; then
    echo "sudo kill \$($contdir/getpid.sh hpcore hpfs hpws)" > $contdir/kill.sh
    sudo chmod +x $contdir/kill.sh
 
+   # Create lcl.sh script
+   echo "max_shard_no=\$(ls -v $contdir/ledger_fs/seed/primary/ | tail -2 | head -1)" > $contdir/lcl.sh
+   echo "echo \"select seq_no, ledger_hash from ledger order by seq_no DESC limit 1;\" | sqlite3 $contdir/ledger_fs/seed/primary/\$max_shard_no/ledger.sqlite" >> $contdir/lcl.sh
+   sudo chmod +x $contdir/lcl.sh
+
    # Configure .screenrc
    pushd $contdir > /dev/null 2>&1
    echo "chdir $contdir" >> hp.screenrc