It is turned on at least:
curl http://bootstrap.testnet.enigma.co/node_info | jq .node_info.other
{
"tx_index": "on",
"rpc_address": "tcp://0.0.0.0:26657"
}
And works for some kind of indexed events:
curl "http://bootstrap.testnet.enigma.co/txs?tx.height=18250"
{
"total_count": "1",
"count": "1",
"page_number": "1",
"page_total": "1",
"limit": "30",
"txs": [
{
"height": "18250",
"txhash": "981A19EA0DD4DA6E292E529ABAF883CC4B17DD727540A0064541989601109865",
or
curl "http://bootstrap.testnet.enigma.co/txs?message.contract_address=enigma1hqrdl6wstt8qzshwc6mrumpjk9338k0lja5ur0"
{
"total_count": "1",
"count": "1",
"page_number": "1",
"page_total": "1",
"limit": "30",
"txs": [
{
"height": "18250",
"txhash": "981A19EA0DD4DA6E292E529ABAF883CC4B17DD727540A0064541989601109865",
The minheight/maxheight patch is currently not released. We ported it to our Cosmos SDK fork for Wasmd.