Search for blocks by BeginBlock and EndBlock events

Example response

{
  "jsonrpc": "2.0",
  "result": {
    "height": "12",
    "txs_results": [
      {
        "code": "0",
        "log": "not enough gas",
        "gas_wanted": "100",
        "gas_used": "100",
        "events": [
          {
            "type": "app",
            "attributes": [
              {
                "key": "YWN0aW9u",
                "value": "c2VuZA=="
              }
            ]
          }
        ],
        "codespace": "ibc"
      }
    ],
    "begin_block_events": [
      {
        "type": "app",
        "attributes": [
          {
            "key": "YWN0aW9u",
            "value": "c2VuZA=="
          }
        ]
      }
    ],
    "end_block": [
      {
        "type": "app",
        "attributes": [
          {
            "key": "YWN0aW9u",
            "value": "c2VuZA=="
          }
        ]
      }
    ],
    "validator_updates": [
      {
        "pub_key": {
          "type": "tendermint/PubKeyEd25519",
          "value": "9tK9IT+FPdf2qm+5c2qaxi10sWP+3erWTKgftn2PaQM="
        },
        "power": "300"
      }
    ],
    "consensus_params_updates": {
      "block": {
        "max_bytes": "22020096",
        "max_gas": "1000",
        "time_iota_ms": "1000"
      },
      "evidence": {
        "max_age_num_blocks": "100000",
        "max_age_duration": "172800000000000"
      },
      "validator": {
        "pub_key_types": [
          "ed25519"
        ]
      }
    }
  }
}