573d3a0e02
317fb96de9c6257972f1213b4ef2c3fe87dde99f Add search for first blk file with pruned node (Rjected)
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When bitcoind is running in pruned mode, producing a hashlist with `./linearize-hashes.py linearize.cfg > hashlist.txt` and then executing `linearize-data.py linearize.cfg` will produce:
```
Read 313001 hashes
Input file /home/dan/.bitcoin/blocks/blk00000.dat
Premature end of block data
```
This happens because `linearize-data` starts by attempting to process `blk00000.dat` regardless of whether or not `blk00000.dat` actually exists - this may not be the case if working with a pruned node.
This PR adds a function which finds the first block file that does exist, and calls that function when the `BlockDataCopier` is initialized.
This is a refactor of #16431.
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ACKs for top commit:
darosior:
ACK 317fb96de9c6257972f1213b4ef2c3fe87dde99f
laanwj:
Code review ACK 317fb96de9c6257972f1213b4ef2c3fe87dde99f
theStack:
Code review ACK
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Dash Core staging tree 0.17
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