Add scripts to assist with controlling darksidewalletd

utils/pullblocks.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+# Usage: ./pullblocks.sh 500000 500100 > blocks.txt
+
+for i in $(seq $1 $2); do
+	zcash-cli getblock $i 0
+done

utils/submitblocks.sh

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+#!/bin/bash
+# Submits a list of blocks, one per line in the file, to darksidewalletd.
+# Usage: ./submitblocks.sh <start height> <sapling activation> <file>
+#   e.g. ./submitblocks.sh 1000 1000 blocks.txt
+set -e
+
+JSON="{\"startHeight\": $1, \"saplingActivation\": $2, \"branchID\": \"2bb40e60\", \"chainName\": \"main\", \"blocks\": "
+JSON="$JSON$(cat "$3" | sed 's/^/"/' | sed 's/$/"/' | sed '1s/^/[/;$!s/$/,/;$s/$/]/')"
+JSON="$JSON}"
+
+grpcurl -insecure -import-path ./walletrpc/ -proto service.proto -d "$JSON" localhost:9067 cash.z.wallet.sdk.rpc.CompactTxStreamer/DarksideSetState