trezor/trezor-firmware
May 2026 – May 2026
1 Month active
Languages Used
JSONPythonRust
Technical Skills
Backend DevelopmentPythonRustSolanaTestingUI Development
Jakub Janků
PROFILE
Jakub Janků
Worked on the trezor-firmware repository to implement Solana off-chain message signing with clear-signing compatibility and multisig support, enabling enterprise workflows and broader Solana integration. Developed UI indicators to display cosigner information and designed comprehensive tests covering multi-cosigner and long-message scenarios. Addressed a runtime stability issue by resolving an import cycle in the Solana module through lazy imports, improving maintainability. Utilized Python and Rust for backend and blockchain development, incorporating cryptography and protobuf for secure message handling. Refactored utility functions for code reuse, contributing to cleaner architecture and reducing integration time for hardware wallet Solana signing features.
Overall Statistics
Feature vs Bugs
50%Features
Repository Contributions
7Total
Bugs
1
Commits
7
Features
1
Lines of code
2,324
Activity Months1
Your Network
42 peopleWork History
May 2026
7 Commits • 1 Features
May 1, 2026May 2026 Monthly Summary for trezor-firmware: - Key features delivered: • Solana off-chain message signing (clear-signing compatible) with multisig support, including UI indicators for cosigners and accompanying tests. This enables enterprise workflows and broader Solana compatibility without requiring on-device signing for long or multi-party messages. Commit references include feat(solana): add off-chain message signing (1d52d583...), fix(solana): support multisig transfer instruction (ad2a4443...), and UI indication update (241caaf8...). - Major bugs fixed: • Fixed potential runtime errors by breaking an import cycle in the Solana module through lazy imports, improving runtime stability for the Solana flow. Commit: fix(solana): break import cycle in types.py (badee388...). - Overall impact and accomplishments: • Expanded Solana signing capabilities with multisig support and cosigner visibility, backed by tests that cover multi-cosigner scenarios and long messages. This reduces integration time for wallets and improves security posture by validating signing flows end-to-end. • Improved code quality and maintainability through targeted refactoring and reuse utilities, preparing for broader use across modules (move is_printable_ascii to common/signverify). - Technologies/skills demonstrated: • Off-chain signing protocols and clear-signing handling, multisig workflows, UI integration for cosigner indexing, comprehensive test design including sign/verify for off-chain messages and multi-cosigner scenarios, and codebase hygiene via lazy imports and utility refactors. - Business value: • Enables Solana signing workflows in hardware wallets with multisig, increasing enterprise adoption, reducing time-to-market for new Solana features, and lowering runtime risk through better test coverage and cycle-breaking fixes.
7 Commits • 1 Features
May 1, 2026May 2026 Monthly Summary for trezor-firmware: - Key features delivered: • Solana off-chain message signing (clear-signing compatible) with multisig support, including UI indicators for cosigners and accompanying tests. This enables enterprise workflows and broader Solana compatibility without requiring on-device signing for long or multi-party messages. Commit references include feat(solana): add off-chain message signing (1d52d583...), fix(solana): support multisig transfer instruction (ad2a4443...), and UI indication update (241caaf8...). - Major bugs fixed: • Fixed potential runtime errors by breaking an import cycle in the Solana module through lazy imports, improving runtime stability for the Solana flow. Commit: fix(solana): break import cycle in types.py (badee388...). - Overall impact and accomplishments: • Expanded Solana signing capabilities with multisig support and cosigner visibility, backed by tests that cover multi-cosigner scenarios and long messages. This reduces integration time for wallets and improves security posture by validating signing flows end-to-end. • Improved code quality and maintainability through targeted refactoring and reuse utilities, preparing for broader use across modules (move is_printable_ascii to common/signverify). - Technologies/skills demonstrated: • Off-chain signing protocols and clear-signing handling, multisig workflows, UI integration for cosigner indexing, comprehensive test design including sign/verify for off-chain messages and multi-cosigner scenarios, and codebase hygiene via lazy imports and utility refactors. - Business value: • Enables Solana signing workflows in hardware wallets with multisig, increasing enterprise adoption, reducing time-to-market for new Solana features, and lowering runtime risk through better test coverage and cycle-breaking fixes.
May 2026
Activity
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Quality Metrics
Correctness100.0%
Maintainability85.8%
Architecture88.6%
Performance85.8%
AI Usage28.6%
Skills & Technologies
Programming Languages
JSONPythonRust
Technical Skills
Backend DevelopmentPythonRustSolanaTestingUI Developmentbackend developmentblockchain developmentcryptographyprotobuftestingunit testing
Repositories Contributed To
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