input-output-hk/mithril
Sep 2025 – Mar 2026
7 Months active
Languages Used
RustMarkdownTOML
Technical Skills
Bug FixCode RefactoringAPI DesignDeprecation ManagementRustVersion Control
Dam
PROFILE
Dam
Over seven months, contributed to the input-output-hk/mithril repository by building and refining cryptographic modules, backend APIs, and proof systems in Rust. Delivered features such as Schnorr signature integration, Poseidon digest support, and Halo2 SNARK workflows, while modernizing the STM module for flexible staking and eligibility logic. Focused on robust error handling, performance optimization, and test coverage, including golden tests and benchmarking. Maintained code quality through systematic refactoring, dependency management, and clear documentation. Addressed bugs and deprecations to ensure reliability and maintainability. Leveraged skills in algorithm design, cryptography, and version control to support secure, efficient blockchain operations.
Overall Statistics
Feature vs Bugs
79%Features
Repository Contributions
98Total
Bugs
9
Commits
98
Features
34
Lines of code
14,934
Activity Months7
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Clément TURMELMember
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Fabian BormannMember
Filip StoyanovMember
curiecryptMember
Hamza JeljeliMember
Jean-Philippe RaynaudMember
leepl37Member
Work History
March 2026
25 Commits • 9 Features
Mar 1, 2026March 2026: Delivered substantial STM module enhancements and reliability improvements for input-output-hk/mithril. Implemented a new STM circuit creation API (try_new) and migrated StmCircuit handling to use STM parameters, with tests included. Updated Close_registration to accept params and updated dependent calls, enabling more flexible runtime behavior. Added phi_f support for ClosedRegistrationEntry and introduced an eligibility function to compute target using phi_f. Performed extensive core STM cleanup, consistency improvements, clippy fixes, and type/refactor work. Refactored target value computation to use phi_f, removed the old From implementation for ClosedRegistrationEntry, and added zero-total_stake checks via TryFrom with a new error condition. Maintained code quality with test updates and changelog/crate version bumps. Overall impact: safer, more flexible staking flows, improved test coverage, and easier maintenance, driving reliability and business value in staking operations.
25 Commits • 9 Features
Mar 1, 2026March 2026: Delivered substantial STM module enhancements and reliability improvements for input-output-hk/mithril. Implemented a new STM circuit creation API (try_new) and migrated StmCircuit handling to use STM parameters, with tests included. Updated Close_registration to accept params and updated dependent calls, enabling more flexible runtime behavior. Added phi_f support for ClosedRegistrationEntry and introduced an eligibility function to compute target using phi_f. Performed extensive core STM cleanup, consistency improvements, clippy fixes, and type/refactor work. Refactored target value computation to use phi_f, removed the old From implementation for ClosedRegistrationEntry, and added zero-total_stake checks via TryFrom with a new error condition. Maintained code quality with test updates and changelog/crate version bumps. Overall impact: safer, more flexible staking flows, improved test coverage, and easier maintenance, driving reliability and business value in staking operations.
March 2026
February 2026
34 Commits • 12 Features
Feb 1, 2026February 2026 (2026-02) – mithril STM module: Delivered a release-ready set of improvements with enhanced test coverage, performance optimizations, and refactors to improve maintainability and security. Key outcomes include a crate version bump with changelog updates, expanded tests and golden tests for target eligibility, significant performance and numeric accuracy improvements (optimized exponential approx and Ln(1-x) handling) with allocation reductions, and architectural refactors (From/TryFrom, hash_to_projective_point, and Snark code moved to halo2_snark). Additional stability and security fixes (Schnorr input type, broken benchmark, removal of sha2, cargo.lock fixes) and ongoing documentation updates. These changes reduce risk of regressions, accelerate iteration, and enhance business value by delivering faster, more reliable cryptographic proofs and easier maintenance.
February 2026
34 Commits • 12 Features
Feb 1, 2026February 2026 (2026-02) – mithril STM module: Delivered a release-ready set of improvements with enhanced test coverage, performance optimizations, and refactors to improve maintainability and security. Key outcomes include a crate version bump with changelog updates, expanded tests and golden tests for target eligibility, significant performance and numeric accuracy improvements (optimized exponential approx and Ln(1-x) handling) with allocation reductions, and architectural refactors (From/TryFrom, hash_to_projective_point, and Snark code moved to halo2_snark). Additional stability and security fixes (Schnorr input type, broken benchmark, removal of sha2, cargo.lock fixes) and ongoing documentation updates. These changes reduce risk of regressions, accelerate iteration, and enhance business value by delivering faster, more reliable cryptographic proofs and easier maintenance.
January 2026
26 Commits • 9 Features
Jan 1, 2026January 2026 performance highlights focused on cryptography modernization, test hygiene, and readiness for SNARK-based proof systems in mithril. Key backend and API improvements included a switch from Dusk to MidnightZK for the STM layer, signature and module renamings for clarity, and a push toward robust, well-documented components. Poseidon digest support was implemented with a dedicated hash module, padding, and comprehensive golden/collision tests. Halo2 SNARK support was added, and IO behavior for Schnorr keys and Merkle tree leaves was updated to improve resilience and serialization consistency. Project housekeeping (logging, versioning) and extensive test cleanup reduced unwraps and edge-case risk, improving stability and maintainability.
26 Commits • 9 Features
Jan 1, 2026January 2026 performance highlights focused on cryptography modernization, test hygiene, and readiness for SNARK-based proof systems in mithril. Key backend and API improvements included a switch from Dusk to MidnightZK for the STM layer, signature and module renamings for clarity, and a push toward robust, well-documented components. Poseidon digest support was implemented with a dedicated hash module, padding, and comprehensive golden/collision tests. Halo2 SNARK support was added, and IO behavior for Schnorr keys and Merkle tree leaves was updated to improve resilience and serialization consistency. Project housekeeping (logging, versioning) and extensive test cleanup reduced unwraps and edge-case risk, improving stability and maintainability.
January 2026
December 2025
5 Commits • 2 Features
Dec 1, 2025December 2025: Key code improvements centered on cryptographic robustness and release hygiene for input-output-hk/mithril. Delivered a robust BLS error handling refactor with a dedicated submodule and standardized error types, improving cryptographic reliability and import clarity. Completed import hygiene improvements (order, typos, and exposure) to ensure stable error propagation and easier future maintenance. Transitioned aggregate signature handling to future_snark by replacing future_proof_system via a feature flag, enhancing security and efficiency for multi-signature workflows. Updated version and CHANGELOG to reflect changes, enabling safer releases and clearer user-facing notes.
December 2025
5 Commits • 2 Features
Dec 1, 2025December 2025: Key code improvements centered on cryptographic robustness and release hygiene for input-output-hk/mithril. Delivered a robust BLS error handling refactor with a dedicated submodule and standardized error types, improving cryptographic reliability and import clarity. Completed import hygiene improvements (order, typos, and exposure) to ensure stable error propagation and easier future maintenance. Transitioned aggregate signature handling to future_snark by replacing future_proof_system via a feature flag, enhancing security and efficiency for multi-signature workflows. Updated version and CHANGELOG to reflect changes, enabling safer releases and clearer user-facing notes.
November 2025
5 Commits • 1 Features
Nov 1, 2025November 2025 monthly summary for input-output-hk/mithril: Delivered the Schnorr signature module integration, including signing and verification keys, signature structure, hashing utilities, and Jubjub-based operations, complemented by tests and a changelog/version bump. Completed base implementation with a migration from Midnight to Dusk, updated variable naming, and incorporation of review feedback. Updated documentation and release notes to support maintainability. Business value focused on establishing a secure signing/verification foundation for Mithril workflows, enabling end-to-end signature verification in cryptographic tooling, improving auditability through tests, and setting the stage for future cryptographic enhancements.
5 Commits • 1 Features
Nov 1, 2025November 2025 monthly summary for input-output-hk/mithril: Delivered the Schnorr signature module integration, including signing and verification keys, signature structure, hashing utilities, and Jubjub-based operations, complemented by tests and a changelog/version bump. Completed base implementation with a migration from Midnight to Dusk, updated variable naming, and incorporation of review feedback. Updated documentation and release notes to support maintainability. Business value focused on establishing a secure signing/verification foundation for Mithril workflows, enabling end-to-end signature verification in cryptographic tooling, improving auditability through tests, and setting the stage for future cryptographic enhancements.
November 2025
October 2025
2 Commits • 1 Features
Oct 1, 2025October 2025 (2025-10) monthly summary for input-output-hk/mithril: Focused maintenance work to improve API clarity and maintain build stability. Delivered two scoped items: a deprecation messaging clarification for BlsVerificationKeyProofOfPossession (public API no longer includes verification; enhanced developer-facing warning) and a Mithril-stm version bump to 0.5.2 with updates to Cargo.toml and Cargo.lock. These changes reduce developer confusion, support smoother onboarding, and keep dependencies current, contributing to reliable builds and predictable releases.
October 2025
2 Commits • 1 Features
Oct 1, 2025October 2025 (2025-10) monthly summary for input-output-hk/mithril: Focused maintenance work to improve API clarity and maintain build stability. Delivered two scoped items: a deprecation messaging clarification for BlsVerificationKeyProofOfPossession (public API no longer includes verification; enhanced developer-facing warning) and a Mithril-stm version bump to 0.5.2 with updates to Cargo.toml and Cargo.lock. These changes reduce developer confusion, support smoother onboarding, and keep dependencies current, contributing to reliable builds and predictable releases.
September 2025
1 Commits
Sep 1, 2025Monthly summary for 2025-09 - input-output-hk/mithril. Focused on reliability and correctness of PoP verification. Main work item: bug fix to correct a typo in the PoP verification function name across tests and registration logic. Correct function name is verify_proof_of_possession; the typo verify_proof_of_possesion was fixed and propagated across relevant files. Commit: 89af2276c5136eb2a5a292f5f8e29bd587e64157. Impact: reduces risk of mis-calls in PoP verification, stabilizes test suite, and prevents mis-registration flows in production. This work enhances identity verification integrity and user trust. Technologies/skills demonstrated: bug hunting, cross-file refactoring, test maintenance, PoP/BLS verification knowledge, and code quality discipline. Business value: more reliable identity verification, fewer support issues related to PoP failures, and improved deployment stability.
1 Commits
Sep 1, 2025Monthly summary for 2025-09 - input-output-hk/mithril. Focused on reliability and correctness of PoP verification. Main work item: bug fix to correct a typo in the PoP verification function name across tests and registration logic. Correct function name is verify_proof_of_possession; the typo verify_proof_of_possesion was fixed and propagated across relevant files. Commit: 89af2276c5136eb2a5a292f5f8e29bd587e64157. Impact: reduces risk of mis-calls in PoP verification, stabilizes test suite, and prevents mis-registration flows in production. This work enhances identity verification integrity and user trust. Technologies/skills demonstrated: bug hunting, cross-file refactoring, test maintenance, PoP/BLS verification knowledge, and code quality discipline. Business value: more reliable identity verification, fewer support issues related to PoP failures, and improved deployment stability.
September 2025
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Quality Metrics
Correctness93.6%
Maintainability89.8%
Architecture90.4%
Performance89.6%
AI Usage24.4%
Skills & Technologies
Programming Languages
MarkdownRustTOML
Technical Skills
API DesignAlgorithm DesignBackend DevelopmentBlockchain DevelopmentBug FixChangelog ManagementCode DocumentationCode RefactoringCryptographyDependency ManagementDeprecation ManagementDocumentationError HandlingProof SystemsRust
Repositories Contributed To
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