
Maciej Malik worked on enhancing blockchain transaction flows and API reliability across LedgerHQ’s ledger-live and device-sdk-ts repositories. He developed robust Hedera swap transaction handling in ledger-live, introducing support for custom fees and flexible parameters using TypeScript and full stack development skills. On device-sdk-ts, Maciej improved the Aleo signer by implementing root and fee intent signing, simplifying view key retrieval, and refactoring APDU command handling for better error messaging and maintainability. His work included strengthening documentation, enforcing naming consistency, and increasing test coverage, resulting in more stable releases and streamlined developer onboarding. The engineering demonstrated depth in backend and protocol integration.
March 2026 (LedgerHQ/device-sdk-ts): Delivered three high-impact features, improved UX, and strengthened release quality for Aleo signer integration. Focused on business value through streamlined signing flows, consistent user interactions, and robust error handling across the signing stack. Key features delivered and changes: - Aleo Signer: Signing Root and Fee Intents: Implemented signing root and fee intents with new commands and interfaces; removed outdated transaction signing methods to streamline the signing flow and enhance transaction capabilities. Supporting artifacts include a changelog entry and updated test coverage. - Get View Key Command UX Simplification: Simplified the Get View Key workflow by removing device flag checks and enforcing consistent user interaction, improving usability and adoption speed. - Signer Error Handling, Messaging, and Release Improvements: Refactored APDU header handling to a common file, updated error codes/messages (notably code 6985) for clarity, and incorporated release-related quality improvements including a changeset and a version bump. Major bug fixes and stability gains: - Improved error messaging for signer code 6985, reducing user confusion and support load. - Consolidated surface area around APDU handling and signing flows to reduce regression risk and improve maintainability. Overall impact and accomplishments: - Faster time-to-sign for root/fee intents, better UX for signer usage, and a more stable, well-documented release cycle. - Higher test coverage and clearer release notes to support faster on-boarding and fewer post-release issues. Technologies/skills demonstrated: - TypeScript/JavaScript, command interfaces, and signer integration patterns. - Test-driven development, changelog creation, and changeset-based release processes. - APDU protocol handling improvements and version management.
March 2026 (LedgerHQ/device-sdk-ts): Delivered three high-impact features, improved UX, and strengthened release quality for Aleo signer integration. Focused on business value through streamlined signing flows, consistent user interactions, and robust error handling across the signing stack. Key features delivered and changes: - Aleo Signer: Signing Root and Fee Intents: Implemented signing root and fee intents with new commands and interfaces; removed outdated transaction signing methods to streamline the signing flow and enhance transaction capabilities. Supporting artifacts include a changelog entry and updated test coverage. - Get View Key Command UX Simplification: Simplified the Get View Key workflow by removing device flag checks and enforcing consistent user interaction, improving usability and adoption speed. - Signer Error Handling, Messaging, and Release Improvements: Refactored APDU header handling to a common file, updated error codes/messages (notably code 6985) for clarity, and incorporated release-related quality improvements including a changeset and a version bump. Major bug fixes and stability gains: - Improved error messaging for signer code 6985, reducing user confusion and support load. - Consolidated surface area around APDU handling and signing flows to reduce regression risk and improve maintainability. Overall impact and accomplishments: - Faster time-to-sign for root/fee intents, better UX for signer usage, and a more stable, well-documented release cycle. - Higher test coverage and clearer release notes to support faster on-boarding and fewer post-release issues. Technologies/skills demonstrated: - TypeScript/JavaScript, command interfaces, and signer integration patterns. - Test-driven development, changelog creation, and changeset-based release processes. - APDU protocol handling improvements and version management.
February 2026 monthly summary for LedgerHQ/device-sdk-ts: API stabilization and signer enhancements to reduce integration risk and improve developer experience. Focused on delivering concrete features, fixing API naming inconsistencies, and strengthening documentation and tests. Key outcomes include a new Aleo signer capability to retrieve the view key via derivation path, plus API renaming from publicKey to address across address-related commands with updated tests and docs. Overall impact: clearer API semantics, easier onboarding for clients, and improved code quality.
February 2026 monthly summary for LedgerHQ/device-sdk-ts: API stabilization and signer enhancements to reduce integration risk and improve developer experience. Focused on delivering concrete features, fixing API naming inconsistencies, and strengthening documentation and tests. Key outcomes include a new Aleo signer capability to retrieve the view key via derivation path, plus API renaming from publicKey to address across address-related commands with updated tests and docs. Overall impact: clearer API semantics, easier onboarding for clients, and improved code quality.
Month: 2025-10 — Ledger Live (LedgerHQ/ledger-live) focus on Hedera swap reliability and flexibility. Delivered Hedera Swaps: Enhanced Transaction Handling by introducing a new transaction strategy to support custom fees and additional parameters, enabling more robust and cost-aware swap flows. This work reduces transaction friction in Hedera swaps and lays groundwork for advanced fee models and parameterized routing. Implemented with focused changes and fixes to ensure correct handling across edge cases (commit 2527f6b4d7147aab4809f26993e78b194f0044c6).
Month: 2025-10 — Ledger Live (LedgerHQ/ledger-live) focus on Hedera swap reliability and flexibility. Delivered Hedera Swaps: Enhanced Transaction Handling by introducing a new transaction strategy to support custom fees and additional parameters, enabling more robust and cost-aware swap flows. This work reduces transaction friction in Hedera swaps and lays groundwork for advanced fee models and parameterized routing. Implemented with focused changes and fixes to ensure correct handling across edge cases (commit 2527f6b4d7147aab4809f26993e78b194f0044c6).

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