rpc: add blockindex to getaddressdeltas method

for the purposes of secondary sorting by block order

qa/rpc-tests/addressindex.py

@@ -177,6 +177,7 @@ class AddressIndexTest(BitcoinTestFramework):
             balance3 += delta["satoshis"]
         assert_equal(balance3, change_amount)
         assert_equal(deltas[0]["address"], address2)
+        assert_equal(deltas[0]["blockindex"], 1)
 
         # Check that entire range will be queried
         deltasAll = self.nodes[1].getaddressdeltas({"addresses": [address2]})

src/rpc/misc.cpp

@@ -786,6 +786,7 @@ UniValue getaddressdeltas(const UniValue& params, bool fHelp)
         delta.push_back(Pair("satoshis", it->second));
         delta.push_back(Pair("txid", it->first.txhash.GetHex()));
         delta.push_back(Pair("index", (int)it->first.index));
+        delta.push_back(Pair("blockindex", (int)it->first.txindex));
         delta.push_back(Pair("height", it->first.blockHeight));
         delta.push_back(Pair("address", address));
         result.push_back(delta);