A library for working with Bitcoin
C-Rank Grade: A (Welcoming) - 63/100
External PR Merge Rate: 63%
Response Time: 3h
First Timer Success: 100%
bitcoinj/bitcoinj has a recorded first-timer success rate of 100.0%. Repositories ranked A typically provide actionable feedback during code reviews and actively nurture new community contributors.
Maintainers in bitcoinj/bitcoinj respond to incoming external pull requests in approximately 2.6 hours on average. Keeping PRs focused on single tasks and ensuring tests pass helps maintainers review faster.
The C-Rank™ system evaluates GitHub projects on a 0–100 scale using real data: PR merge rates, review turnaround time, active maintainer presence, and first-time contributor success. A score of 63.3 places bitcoinj/bitcoinj in the A tier.
The external contributor pull request merge rate for bitcoinj/bitcoinj is 62.9%, based on public PR activity from non-core contributors.
bitcoinj/bitcoinj currently has 3 active issue(s) tagged with beginner-friendly labels like "good first issue", "beginner", or "up-for-grabs".
Balanced & professional review environment in bitcoinj/bitcoinj. Maintains strict focus on technical quality and test standards.
Average Response Latency
Tracks hours until a maintainer leaves a review, comment, or PR response.
External Acceptance Rate
Percentage of community pull requests successfully merged into main.
First PR Conversion
Rate at which developers submitting their first repository PR succeed.
Show contributors that your repository actively reviews and merges external pull requests.
[](https://getmerged.abhishekco.de/bitcoinj/bitcoinj?utm_source=github&utm_medium=badge)
Historical health & responsiveness evolution
External PR acceptance
First PR success rate
50% receive response in
90% receive response in
Maintainer review activity heatmap & prime window prediction
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Detected: UTC
Maintainers are most responsive around 07:00 UTC (07:00 UTC in your timezone). Recommended submission window is Tuesday - Thursday from 20:00 to 00:00 UTC (20:00 - 00:00 UTC local).
Maintainer Strategy: Maintainer Sweet Spot: PRs under 150 lines merge in ~4 hours (79% approval). Large PRs (>500 lines) take ~12 hours (28% approval). Keep your diff compact for rapid review.
I found that DeterministicKey createMasterPrivateKey provides input check for byte[] seed . checkArgument(seed.length > 8, () -> "seed is too short and could be brute forced"); However, the constraints defined in BIP32 Generate a seed byte sequence S of a chosen length (between 128 and 512 bits; 256 bits is advised) from a (P)RNG. are different. I wonder whether there is a specific reason for this, or whether this effectively 9-byte lower bound was chosen arbitrarily. In any case, I would recommend adhering to the specification as closely as possible. Found using the bitcoinfuzz tool.
Maybe InternalUtils.getRootCause()? We should probably write a few tests. The other question is whether our InternalUtils.getRootCause() needs to handle loops in the dependency chain. I think we should strongly consider keeping it simple as I doubt we have anything complicated enough to cause loops.
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When evaluating whether to contribute to bitcoinj/bitcoinj, response velocity and maintainer engagement are crucial. GetMerged continuously tracks pull request trajectories, first-comment latency, and code review rounds to help developers avoid submitting pull requests to backlogged repositories.
Currently, maintainers of bitcoinj/bitcoinj acknowledge new external contributions in approximately 2 hours. Out of all submitted pull requests from non-core authors in the last 180-day window, 62.9% were successfully merged into the primary branch.
bitcoinj/bitcoinj has a recorded first-timer success rate of 100.0%. Repositories ranked Welcoming typically provide actionable feedback during code reviews and actively nurture new community contributors.
The initial maintainer response time averages ~2 hours. Keeping PRs scoped to single concerns and ensuring CI checks succeed will optimize review turnaround.
The C-Rank™ index scores repositories on a 0 to 100 scale using an objective formula: external PR merge rates, initial response speed, active maintainer count, and first-time contributor retention. A score of 63.3 places bitcoinj/bitcoinj in the Welcoming tier.
The external pull request merge rate is 62.9%. GetMerged isolates non-core community contributions so external developers get an accurate benchmark of PR acceptance probability.
Yes, bitcoinj/bitcoinj currently has 3 active issue(s) tagged with beginner-friendly labels. You can inspect these directly from the repository issues tab.
All metrics displayed for bitcoinj/bitcoinj are automatically retrieved via the public GitHub API and recalculated daily. Insider pull requests submitted by repository owners or organization members are excluded from merge rate calculations to preserve objective external contributor statistics.