Add docker fragment for opt-txindex to enable txindex=1 (#178)

* Add docker fragment for opt-txindex to enable txindex=1

* Document opt-txindex in README

* Throw error if both opt-txindex and opt-save-storage-* are enabled

README.md

@@ -180,6 +180,7 @@ Available `BTCPAYGEN_ADDITIONAL_FRAGMENTS` currently are:
 * [opt-add-woocommerce](docker-compose-generator/docker-fragments/opt-add-woocommerce.yml), for a self-hosted woocommerce with BTCPay Server plugin pre installed.
 * [opt-add-tor](docker-compose-generator/docker-fragments/opt-add-tor.yml), for exposing BTCPayServer, Woocommerce, your lightning nodes as hidden services and accept onion peers for your full node. Warning: This options is for working around NAT and firewall problems as well as to help protect your customer's privacy. This will not protect your privacy against a targeted attack against you.
 * [opt-add-btctransmuter](docker-compose-generator/docker-fragments/opt-add-btctransmuter.yml), for a self-hosted IFTTT style service for crypto services such as fiat settlement.
+* [opt-txindex](docker-compose-generator/docker-fragments/opt-txindex.yml), to enable txindex=1 in bitcoin.conf if you require txindexing for Bisq, DOJO, Esplora, etc.
 
 You can also create your own [custom fragments](#how-can-i-customize-the-generated-docker-compose-file).
 

btcpay-setup.sh

@@ -229,6 +229,15 @@ if [[ "$BTCPAYGEN_REVERSEPROXY" == "nginx" ]] && [[ "$BTCPAY_HOST" ]]; then
     BTCPAY_HOST="$DOMAIN_NAME"
 fi
 
+# Since opt-txindex requires unpruned node, throw an error if both
+# opt-txindex and opt-save-storage-* are enabled together
+if [[ "${BTCPAYGEN_ADDITIONAL_FRAGMENTS}" == *opt-txindex* ]] && \
+   [[ "${BTCPAYGEN_ADDITIONAL_FRAGMENTS}" == *opt-save-storage* ]];then
+        echo "Error: BTCPAYGEN_ADDITIONAL_FRAGMENTS contains both opt-txindex and opt-save-storage*"
+		echo "opt-txindex requires an unpruned node, so you cannot use opt-save-storage with it"
+        return
+fi
+
 cd "$BTCPAY_BASE_DIRECTORY/btcpayserver-docker"
 . helpers.sh
 btcpay_expand_variables

docker-compose-generator/docker-fragments/opt-txindex.yml

@@ -0,0 +1,32 @@
+version: "3"
+# must not use opt-save-storage
+
+services:
+  bitcoind:
+    environment:
+      BITCOIN_EXTRA_ARGS: |
+        txindex=1
+  bgoldd:
+    environment:
+      BITCOIN_EXTRA_ARGS: |
+        txindex=1
+  feathercoind:
+    environment:
+      BITCOIN_EXTRA_ARGS: |
+        txindex=1
+  groestlcoind:
+    environment:
+      BITCOIN_EXTRA_ARGS: |
+        txindex=1
+  litecoind:
+    environment:
+      BITCOIN_EXTRA_ARGS: |
+        txindex=1
+  viacoind:
+    environment:
+      BITCOIN_EXTRA_ARGS: |
+        txindex=1
+  monacoind:
+    environment:
+      BITCOIN_EXTRA_ARGS: |
+        txindex=1