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)
ffd09281fe rpc: various fixups for dumptxoutset (James O'Beirne)
Pull request description:
This is part of the [assumeutxo project](https://github.com/bitcoin/bitcoin/projects/11) (parent PR: #15606)
---
A few fixes to make this RPC actually useful when generating snapshots.
- Generate an assumeutxo hash and display it (sort of a bugfix)
- Add nchaintx to output (necessary for use in chainparams entry)
- Add path of serialized UTXO file to output
ACKs for top commit:
laanwj:
Code review ACK ffd09281fe
Tree-SHA512: b0b5fd5138dea0e21258b1b18ab75bf3fd1628522cc1dbafa81af9cb9fa96562a1c39124fdb31057f256bfc560f462f907e9fe5e209b577b3f57afae2b7be826
- Actually generate an assumeutxo hash and display it
- Add nchaintx to output (necessary for use in chainparams entry)
- Add path of serialized UTXO file to output
The previous diff touched most files in ./test/, so bump the headers to
avoid having to touch them again for a bump later.
-BEGIN VERIFY SCRIPT-
./contrib/devtools/copyright_header.py update ./test/
-END VERIFY SCRIPT-
This value is no longer used and is instead specified statically
in chainparams. This change means that previously generated
snapshots will no longer be usable.
Sebastian Falbesoner