Switching the endianness of a hex string `str` can simply be
achieved by `bytes.fromhex(str)[::-1].hex()`, i.e. we can use
that and remove those helper methods.
317fb96de9 Add search for first blk file with pruned node (Rjected)
Pull request description:
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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 317fb96de9
laanwj:
Code review ACK 317fb96de9
theStack:
Code review ACK 317fb96de9
Tree-SHA512: fc8014282df6cfe7b267e64db8ce7d82b86b758c302fbfea4a3c39b62d93512f5c2e31a0de4e9c5ec18fc0268c917f011257d37b45afaef6033eec90e4aa585f
582e66b6e7 doc: Added regtest config for linearize script (Gr0kchain)
Pull request description:
Updated the example-linearize.cfg file to include support for the regtest chain network config which is used by the ./linearize-data.py
Problem:
Without the regtest magic, genesis hash and path config, the `linearize-data.py` script cannot generate a bootstrap.dat file.
Example:
./linearize-data.py ./linearize.cfg
Read 102 hashes
Genesis block not found in hashlist
Solution:
Added netmagic, genesis and input example parameters to file.
Resolution
1. Starting bitcoind in regtest mode
2. bitcoin-cli generatetoaddress 101 $(bitcoin-cli getnewaddress)
3. ./linearize-hashes.py ./linearize.cfg > ./hashlist.txt
4. ./linearize-data.py ./linearize.cfg
```
$ ./linearize-data.py ./linearize.cfg
Read 102 hashes
Input file /Users/gr0kchain/.bitcoin/regtest/blocks/blk00000.dat
Output file /Users/gr0kchain/Downloads/bootstrap.dat
Done (102 blocks written)
```
ACKs for top commit:
fanquake:
ACK 582e66b6e7
Tree-SHA512: 699e92e740e68e2e5190ba37538efbbe3e4d4e725ebd6af704a0cf5517683b691754f7ea097bf840845d2b53b793c63258d406e9bd37922db810cf58bed053c3
Updated the example-linearize.cfg file to include support for the regtest chain network config which is used by the ./linearize-data.py
Problem:
Without the regtest magic, genesis hash and path config, the `linearize-data.py` script cannot generate a bootstrap.dat file.
Example of error:
./linearize-data.py ./linearize.cfg
Read 102 hashes
Genesis block not found in hashlist
Solution:
Added netmagic, genesis and input example parameters to file.
Resolution
1. Starting bitcoind in regtest mode
2. bitcoin-cli generatetoaddress 101 $(bitcoin-cli getnewaddress)
3. ./linearize-hashes.py ./linearize.cfg > ./hashlist.txt
4. ./linearize-data.py ./linearize.cfg
Example after fix:
$ ./linearize-data.py ./linearize.cfg
Read 102 hashes
Input file /Users/gr0kchain/.bitcoin/regtest/blocks/blk00000.dat
Output file /Users/gr0kchain/Downloads/bootstrap.dat
Done (102 blocks written)
3284e6c09a scripts: search for next position of magic bytes rather than fail (Tim Akinbo)
Pull request description:
When using the `linearize-data.py` contrib script to export block data, there are edge cases where the script fails with an `Invalid magic: 00000000` error. This error occurs due to the presence of padding bytes that occasionally appears between consecutive blocks in the block data file.
There's an ongoing conversation about this in #14986. sipa also admitted that it is a bug in #5028. Fortunately, this is not an issue in bitcoin core as it handles this type of situation gracefully and so no fix in bitcoin core is required.
This PR is an improvement on how the script handles these "invalid magic bytes". Rather than failing, this patch allows the script to search for the next occurrence of the magic bytes and then starts reading the block from there.
ACKs for top commit:
laanwj:
ACK 3284e6c09a
Tree-SHA512: 18067ae0b4b62e822dfc558a86439ad6acaf939b98479e38e8e4248536574643b26eb48e96ec7139375c88b42cbe7705a64deb13a3c239e16025a6aad3d69bfa
Flagged by flake8 v3.6.0, as W605, plus a few others identified
incidentally, e.g. 59ffecf66cf4d08c4b431e457b083878d66a3fd6.
Note that r"\n" matches to "\n" under re.match/search.
ce3baa193 changed regtest RPCport to 18443 to avoid conflict with testnet 18332 (Ferdinando M. Ametrano)
Pull request description:
using the same JSON-RPC default port for both testnet and regtest prevents running both at the same time on the same machine. Since RPCport=P2Pport-1 for both mainnet and testnet, and regtest P2Pport being 18444, 18443 is proposed for regtest RPCport
Documentation has been updated (or created where missing); manpages doc/man/bitcoin*.1 could include information for regtest too
Tree-SHA512: d42185f7ef54dc918ece19b543c8681d08bb9c5a971394e21f2d9a1091734b091b08df69fab622c207b46f402cf9323ded5b7a33fbd0af722388930169124e7f
Adds a datadir configuration option to the linearize scripts to allow the script to use the RPC cookie instead of requiring the user to set a rpcuser and rpcpassword for the rpc server.
- The last-timestamp-encountered variable wasn’t being used properly. Rewrite code to properly allow for new blockchain files to be written when split by month.
- Properly set a blockchain file’s access and modify times.
- Add a “debug output” option to quiet certain output that might not always be desirable.
- Update the README.
- Add a space after the fixed string prepended to file names when input or
output file changes
- Clarify the error message when the genesis block is not found in the
hash list (...why do we have this at all?)
Make it possible to read blocks in any order. This will be required
after headers-first (#4468), so should be merged before that.
- Read block header. For expected blocks, continue, else skip.
- For in-order blocks: copy block contents directly. Write prior
out-of-order blocks if this connects a consecutive span.
- For out-of-order blocks, store extents of block data for later
retrieval. Cache out-of-order blocks in memory up to 100MB
(configurable).
This was typically ensured implicitly by virtue of normal bitcoind
operation. Adding an explicit check provides a stronger guarantee, and
it is cheap to add.
Sebastian Falbesoner