ily before this RPC returns), or false if there is no scan to abort

Result (when action=='status' and a scan is currently in progress):
{                    (json object)
  "progress" : n     (numeric) Approximate percent complete
}

Result (when action=='status' and no scan is in progress - possibly already completed):
null    (json null)

Examples:
> bitcoin-cli scantxoutset start '["raw(76a91411b366edfc0a8b66feebae5c2e25a7b6a5d1cf3188ac)#fm24fxxy"]'
> bitcoin-cli scantxoutset status
> bitcoin-cli scantx