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The tracepoint `validation:block_connected` was introduced in #22006. The first argument was the hash of the connected block as a pointer to a C-like String. The last argument passed the hash of the connected block as a pointer to 32 bytes. The hash was only passed as string to allow `bpftrace` scripts to print the hash. It was (incorrectly) assumed that `bpftrace` cannot hex-format and print the block hash given only the hash as bytes. The block hash can be printed in `bpftrace` by calling `printf("%02x")` for each byte of the hash in an `unroll () {...}`. By starting from the last byte of the hash, it can be printed in big-endian (the block-explorer format). ```C $p = $hash + 31; unroll(32) { $b = *(uint8*)$p; printf("%02x", $b); $p -= 1; } ``` See also: https://github.com/bitcoin/bitcoin/pull/22902#discussion_r705176691 This is a breaking change to the block_connected tracepoint API, however this tracepoint has not yet been included in a release.
Repository Tools
Developer tools
Specific tools for developers working on this repository.
Additional tools, including the github-merge.py script, are available in the maintainer-tools repository.
Verify-Commits
Tool to verify that every merge commit was signed by a developer using the github-merge.py script.
Linearize
Construct a linear, no-fork, best version of the blockchain.
Qos
A Linux bash script that will set up traffic control (tc) to limit the outgoing bandwidth for connections to the Bitcoin network. This means one can have an always-on bitcoind instance running, and another local bitcoind/bitcoin-qt instance which connects to this node and receives blocks from it.
Seeds
Utility to generate the pnSeed[] array that is compiled into the client.
Build Tools and Keys
Packaging
The Debian subfolder contains the copyright file.
All other packaging related files can be found in the bitcoin-core/packaging repository.
Builder keys
PGP keys used for signing Bitcoin Core release results.
MacDeploy
Scripts and notes for Mac builds.
Test and Verify Tools
TestGen
Utilities to generate test vectors for the data-driven Bitcoin tests.
Verify Binaries
This script attempts to download and verify the signature file SHA256SUMS.asc from bitcoin.org.