Add scripts to upload and download utxosets

contrib/load-utxo-set.sh

@@ -0,0 +1,43 @@
+#!/bin/bash
+
+# This script shows the steps to download and update an archive of the current UTXO Set
+
+exit # This script is not meant to run automatically
+
+
+## ARGS#
+NETWORK="testnet"
+DOWNLOAD_LINK="http://utxosets.blob.core.windows.net/public/utxo-snapshot-bitcoin-testnet-1445586.tar"
+TAR_FILE_HASH="eabaaa717bb8eeaf603e383dd8642d9d34df8e767fccbd208b0c936b79c82742"
+#######
+
+BITCOIN_DATA_DIR="/var/lib/docker/volumes/generated_bitcoin_datadir/_data"
+[ ! -d "$BITCOIN_DATA_DIR" ] && mkdir -p "$BITCOIN_DATA_DIR"
+
+TAR_FILE="$BITCOIN_DATA_DIR/snapshot.tar"
+echo "Downloading $DOWNLOAD_LINK to $TAR_FILE"
+wget "$DOWNLOAD_LINK" -q --show-progress -O "$TAR_FILE"
+
+if ! echo "$TAR_FILE_HASH" "$TAR_FILE" | sha256sum -c -; then  
+  echo "Invalid hash"
+  exit 1
+fi
+
+NETWORK_DIRECTORY=$NETWORK
+if [[ $NETWORK == "mainnet" ]]; then
+  NETWORK_DIRECTORY="."
+fi
+if [[ $NETWORK == "testnet" ]]; then
+  NETWORK_DIRECTORY="testnet3"
+fi
+
+NETWORK_DIRECTORY="$BITCOIN_DATA_DIR/$NETWORK_DIRECTORY"
+[ -d "$NETWORK_DIRECTORY/blocks" ] && rm -rf "$NETWORK_DIRECTORY/blocks"
+[ -d "$NETWORK_DIRECTORY/chainstate" ] && rm -rf "$NETWORK_DIRECTORY/chainstate"
+[ ! -d "$NETWORK_DIRECTORY" ] && mkdir "$NETWORK_DIRECTORY"
+
+echo "Extracting..."
+tar -xf "$TAR_FILE" -C "$BITCOIN_DATA_DIR"
+
+echo "Extracted"
+rm "$TAR_FILE"