Sebastian Falbesoner 9feb887082 rpc: check fopen return code in dumptxoutset ...

This change improves the usability of the `dumptxoutset` RPC in two ways,
in the case that an invalid path is passed:
  1. return from the RPC immediately, rather then when the file is first
     tried to be written (which is _after_ calculating the UTXO set hash)
  2. return a proper return code and error message instead of the cryptic
     "CAutoFile::operator<<: file handle is nullptr: unspecified
      iostream_category error" (-1)

2022-05-11 16:03:40 +02:00

2.3 KiB

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