Hello Litecoin developers,
Over the last few years I have been working on UltrafastSecp256k1, a secp256k1 implementation focused on performance, portability, reproducibility, and continuous verification.
The project started as a performance-focused ECC engine, but has evolved into a broader engineering platform that includes:
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secp256k1 primitives (ECDSA, Schnorr, ECDH)
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MuSig2 (BIP-327)
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BIP-324 support
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HD wallet functionality (BIP-32)
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Litecoin Silent Payments support (LTC-SP)
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CPU and GPU acceleration paths
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Cross-platform support (Linux, Windows, macOS, ARM64, RISC-V, WASM, embedded targets)
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Continuous Audit as a Service (CAAS) verification framework
The goal of this post is not to suggest replacing existing infrastructure. The goal is simply to present an additional implementation that developers can evaluate independently.
Optional Backend Philosophy
The project follows a simple principle:
Trust the measurements, not the claims.
Everything is designed to be reproducible:
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Public source code
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Benchmark artifacts
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Replayable audit evidence
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Differential testing
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Bitcoin-family compatibility layers
Developers can benchmark the implementation themselves and decide whether it is useful for their particular workload.
Litecoin-Oriented Build Profiles
One of the recent additions is a profile-based build system.
Instead of compiling every available feature, projects can select only the functionality they require.
Examples:
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Litecoin Core backend profile
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Wallet profile
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Embedded profile
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GPU scanning profile
This reduces deployment footprint while keeping the repository flexible.
Litecoin Silent Payments (LTC-SP)
The project also includes Litecoin Silent Payments support.
The implementation adapts the Silent Payments model for Litecoin-specific usage while maintaining chain isolation through Litecoin-specific tagged hashing domains.
The focus here has been practical usability:
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Fast scanning
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Multi-threaded CPU execution
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GPU acceleration
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Wallet-oriented integration
Recent benchmarks show scanning throughput orders of magnitude above current Litecoin transaction volume, making privacy-preserving payment discovery practical even on consumer hardware.
Engineering Focus
Much of the recent work has focused on:
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Build system simplification
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Cross-platform portability
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Continuous verification
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Shim compatibility layers
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Binary footprint reduction
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Deployment-oriented profiles
One interesting result from recent work is that a minimal shim-only build can produce a smaller deployment footprint than expected despite the repository supporting many optional modules.
Verification Approach
The project includes:
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Differential testing
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Wycheproof validation
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Replayable audit artifacts
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Exploit and regression suites
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Continuous verification gates
The intent is not to ask users to trust a benchmark screenshot or a one-time audit PDF, but to make verification repeatable.
Feedback Welcome
If anyone from the Litecoin ecosystem is interested in reviewing, benchmarking, testing, or integrating the project into experimental environments, feedback is always welcome.
Even negative results are valuable if they help improve the implementation.
Repository:
https://github.com/shrec/UltrafastSecp256k1
Thank you for reading.