Maintenance Windows

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The RPC API enables you to query future maintenance windows for a specific validator in current epoch

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Maintenance windows

The maintenance windows for a specific validator are future block height ranges in current epoch, in which the validator does not need produce block or chunk If the provided account is not a validator, then it will return the range from now to the end of the epoch.

• method: EXPERIMENTAL_maintenance_windows

• params:

  • account_id

example:

{
  "jsonrpc": "2.0",
  "id": "dontcare",
  "method": "EXPERIMENTAL_maintenance_windows",
  "params": {
    "account_id": "node0"
  }
}

http post https://near.nownodes.io/{API_KEY} jsonrpc=2.0 id=dontcare method=EXPERIMENTAL_maintenance_windows \
  params:='{
    "account_id": "node0"
  }'

Example response:

The result will be a list of future maintenance windows in current epoch. For example a window `[1028, 1031]` includes 1028, 1029 and 1030.

{
    "jsonrpc": "2.0",
    "result": [
        [
            1028,
            1031
        ],
        [
            1034,
            1038
        ],
    ],
    "id": "dontcare"
}

What Could Go Wrong??

When API request fails, RPC server returns a structured error response with a limited number of well-defined error variants, so client code can exhaustively handle all the possible error cases. Our JSON-RPC errors follow verror convention for structuring the error response:

{
    "error": {
        "name": <ERROR_TYPE>,
        "cause": {
            "info": {..},
            "name": <ERROR_CAUSE>
        },
        "code": -32000,
        "data": String,
        "message": "Server error",
    },
    "id": "dontcare",
    "jsonrpc": "2.0"
}

Here is the exhaustive list of the error variants that can be returned by maintenance_windows method:

ERROR_TYPE error.name	ERROR_CAUSE error.cause.name	Reason	Solution
INTERNAL_ERROR	INTERNAL_ERROR	Something went wrong with the node itself or overloaded	Try again later Send a request to a different node Check error.cause.info for more details