Right now, transactions are not indexed. There is a setting somewhere in Tendermint to enable that. Reproduce with
curl "http://bootstrap.testnet.enigma.co/txs?tx.minheight=1"
{
"total_count": "0",
"count": "0",
"page_number": "1",
"page_total": "0",
"limit": "30",
"txs": []
}
The same command works for demonet:
curl "https://lcd.demo-07.cosmwasm.com/txs?tx.minheight=1" | jq .total_count
"63"