LedgerHQ/ledger-live
Feb 2025 – Feb 2026
13 Months active
Languages Used
JSONJavaScriptMarkdownTypeScripttsxYAMLShellyaml
Technical Skills
Backend DevelopmentCLI DevelopmentCryptocurrency IntegrationDockerDocumentationEVM
François Guérin
PROFILE
François Guérin
François Guerin engineered and maintained core features for LedgerHQ/ledger-live, focusing on blockchain integrations, transaction reliability, and developer tooling. Over 13 months, he delivered enhancements such as dynamic token support, cross-chain fee estimation, and robust monitoring, using TypeScript, JavaScript, and Docker. His work included architectural refactors to streamline coin modules, improved error handling for Ethereum and Solana, and expanded CI/CD pipelines for test stability. By implementing adapter patterns and strengthening API design, François enabled faster asset discovery, safer transaction flows, and more maintainable code. His contributions addressed both user-facing UX improvements and backend reliability, demonstrating technical depth and versatility.
Overall Statistics
Feature vs Bugs
70%Features
Repository Contributions
181Total
Bugs
37
Commits
181
Features
87
Lines of code
2,874,068
Activity Months13
Your Network
256 people
Work History
February 2026
10 Commits • 6 Features
Feb 1, 2026February 2026 — Ledger Live (LedgerHQ/ledger-live) delivered tangible business value through feature delivery, improved error handling, and code quality improvements. Key outcomes include enhanced CoinModule documentation, clearer error messaging for enabling contract data in Ethereum app, improved observability via NaN and string error logging, standardized TypeScript/ESLint configurations, and dependency modernization, plus removal of Sei network support. These changes reduce user friction, stabilize builds, and improve maintainability.
10 Commits • 6 Features
Feb 1, 2026February 2026 — Ledger Live (LedgerHQ/ledger-live) delivered tangible business value through feature delivery, improved error handling, and code quality improvements. Key outcomes include enhanced CoinModule documentation, clearer error messaging for enabling contract data in Ethereum app, improved observability via NaN and string error logging, standardized TypeScript/ESLint configurations, and dependency modernization, plus removal of Sei network support. These changes reduce user friction, stabilize builds, and improve maintainability.
February 2026
January 2026
23 Commits • 12 Features
Jan 1, 2026January 2026 monthly summary for Ledger Live focusing on stability, performance, and developer experience across LedgerHQ/ledger-live. Key deliverables include critical coin-evm bug fixes (balance batching, refreshOperations exposure, native internal operations display, fee estimation on invalid transactions, and contract address harmonization), substantial performance improvements in the coin-framework, and several LLC enhancements aimed at faster token discovery and stronger typing. Additionally, CI reliability, test stability, and observability improved through targeted fixes and logging improvements. These efforts reduce production risk, speed up balance-related workflows, and lay groundwork for forthcoming features.
January 2026
23 Commits • 12 Features
Jan 1, 2026January 2026 monthly summary for Ledger Live focusing on stability, performance, and developer experience across LedgerHQ/ledger-live. Key deliverables include critical coin-evm bug fixes (balance batching, refreshOperations exposure, native internal operations display, fee estimation on invalid transactions, and contract address harmonization), substantial performance improvements in the coin-framework, and several LLC enhancements aimed at faster token discovery and stronger typing. Additionally, CI reliability, test stability, and observability improved through targeted fixes and logging improvements. These efforts reduce production risk, speed up balance-related workflows, and lay groundwork for forthcoming features.
December 2025
11 Commits • 4 Features
Dec 1, 2025Monthly performance summary for 2025-12: Implemented key UX and reliability improvements across Ledger Live, with a focus on cross-chain integrations, configurable transaction controls, and strengthened testing/CI. Delivered measurable business value through faster, more accurate transaction views, improved cross-network stability, and reduced regression risk through enhanced testing pipelines.
11 Commits • 4 Features
Dec 1, 2025Monthly performance summary for 2025-12: Implemented key UX and reliability improvements across Ledger Live, with a focus on cross-chain integrations, configurable transaction controls, and strengthened testing/CI. Delivered measurable business value through faster, more accurate transaction views, improved cross-network stability, and reduced regression risk through enhanced testing pipelines.
December 2025
November 2025
13 Commits • 8 Features
Nov 1, 2025November 2025 monthly summary for LedgerHQ/ledger-live. Delivered key features across the Generic Adapter, Algorand token accounts, and transaction history, while hardening data integrity and CI stability. Notable outcomes include recipient domain name support in the Generic Adapter, a new postSync cleanup hook, deterministic token account ordering for Algorand, transaction history sorting by date, and scratch-sync on hash mismatch to ensure data integrity. Additional stability improvements include dependency upgrades, Detox/CI workflow enhancements, and removal of an LRU cache for Stake RPC to simplify data fetching. These changes collectively improve business value by boosting reliability, UX, and developer velocity.
November 2025
13 Commits • 8 Features
Nov 1, 2025November 2025 monthly summary for LedgerHQ/ledger-live. Delivered key features across the Generic Adapter, Algorand token accounts, and transaction history, while hardening data integrity and CI stability. Notable outcomes include recipient domain name support in the Generic Adapter, a new postSync cleanup hook, deterministic token account ordering for Algorand, transaction history sorting by date, and scratch-sync on hash mismatch to ensure data integrity. Additional stability improvements include dependency upgrades, Detox/CI workflow enhancements, and removal of an LRU cache for Stake RPC to simplify data fetching. These changes collectively improve business value by boosting reliability, UX, and developer velocity.
October 2025
15 Commits • 4 Features
Oct 1, 2025October 2025 monthly summary for Ledger Live. The month focused on delivering cross-chain capabilities, improving compatibility, and strengthening stability across Solana, EVM, Tezos, Hedera, and the generic adapter. Notable outcomes include new Solana extension handling with tests, Layer 2 fee and custom gas support for EVM, NFT/multi-sub-operation support in the generic adapter, Tezos zero-amount handling in spend estimation, Hedera test scaffolding and a getValidators stub with explicit not-supported behavior, and comprehensive CI/stability improvements.
15 Commits • 4 Features
Oct 1, 2025October 2025 monthly summary for Ledger Live. The month focused on delivering cross-chain capabilities, improving compatibility, and strengthening stability across Solana, EVM, Tezos, Hedera, and the generic adapter. Notable outcomes include new Solana extension handling with tests, Layer 2 fee and custom gas support for EVM, NFT/multi-sub-operation support in the generic adapter, Tezos zero-amount handling in spend estimation, Hedera test scaffolding and a getValidators stub with explicit not-supported behavior, and comprehensive CI/stability improvements.
October 2025
September 2025
16 Commits • 5 Features
Sep 1, 2025September 2025 – Ledger Live: Delivered reliability, standardization, and feature enhancements across coin modules with measurable business impact. Key improvements include CI reliability hardening, standardized token asset encoding, and expanded EVM/native asset handling to support richer operations, better fee estimation, and safer intents.
September 2025
16 Commits • 5 Features
Sep 1, 2025September 2025 – Ledger Live: Delivered reliability, standardization, and feature enhancements across coin modules with measurable business impact. Key improvements include CI reliability hardening, standardized token asset encoding, and expanded EVM/native asset handling to support richer operations, better fee estimation, and safer intents.
August 2025
27 Commits • 20 Features
Aug 1, 2025August 2025 highlights for Ledger Live (LedgerHQ/ledger-live): Key features delivered: - coin-evm: Implemented validateIntent to improve user intent handling and added getSequence to support reliable operation sequencing (commits e8899f0dac12c6ca9c655c121eeb907f6bbad844; 589e0e62092359f48b2a7d22d1d8ecf363ac04b1). - coin-evm: Exposed gasLimit and gasOptions in estimateFees to enable flexible gas parameterization (commit 2834ca443fe9071979d3b506e4ca4fbc17aeca7b). - BridgeApi: Added getTokenFromAsset to map assets to token representations (commit 89fc31e8ecfc5e2fd679a2694b3514f8fb19d7b7). - coin-modules-monitoring: Refactored for robustness (do not stop on failure; can skip currencies) and began populating assetOwner where possible; introduced CI caching for monitor workflows and re-enabled monitoring for icon and sui (commits 8d5abe4d59f7b1ef5d1d495d1ef3e3bf6d95fe4, 75e8028ca a9e23eab47aa629a89b44c6cd6e83a3, 85ebedd01ebc001493f44be82c22d3415d39a32c, 9af40eb449611f043e7fe3de540cda976e49836d). - Testing and observability: Improved Alpaca integration tests for coin-evm and updated coverage tooling; updated Datadog observability domain and codeowners to reflect monitoring scope (commits 6746cf0f61be566026b5d53d2dc648db543354d2; 86a052718eb3c25fe501175887865d9d8f94cf60; 069a303205e4d1b842eacccd12844a841228d26e). Major bugs fixed: - fix(coin-evm): Use toFixed instead of toString when representing coin-evm values to ensure accurate display and calculations (commit cf29b897219b6ea7963decf8e8dc0916cfb087b2). - fix(common): Do not pretend asset balance position in common module, correcting balance reporting (commit e1155b8420f06ead4ab377e16202afdd9133bd26). - fix(coin-modules-monitoring): Set crypto asset store to ensure monitoring starts with correct state (commit 75e8028caa9e23eab47aa629a89b44c6cd6e83a3). - fix(coin-tron): Set transaction type to unknown on staking scenarios to avoid misclassification (commit 19e0b97f12404f0bb857e5430cecf77c7eb128e9). - test(coin-evm): Fix integration tests after estimateFees changes to restore test stability (commit a9a0c18d91cac8d4bb805d558d3d0bd50337d98a). - coin-evm: Revert prior estimateFees parameter adaptation to restore expected behavior while maintaining earlier improvements (commits a3fcd55fdea8c6ffbbb818825382cc96637fe8f5 and 2a4070b594271007fa47dc7451b612008a233006). Overall impact and accomplishments: - Increased reliability and predictability of EVM-related features, improved fee estimation reliability, and stronger observability and incident resilience across monitoring components. - Reduced risk of misreported balances and incorrect transaction types, contributing to higher user trust and fewer support tickets. - Streamlined CI workflows with caching and automated monitoring scheduling, accelerating feedback loops and deployment velocity. Technologies and skills demonstrated: - TypeScript/JavaScript engineering, feature toggling and API evolution (BridgeApi, coin-evm), and adapter-based refactoring. - Robust testing practices: integration and Alpaca tests, CI test setup, and test coverage tooling. - Observability and reliability: Datadog integration, enhanced error metadata, and robust monitoring workflows. - Code quality and maintainability: ESLint rules enforcement, lint cleanups, and codeowners governance.
27 Commits • 20 Features
Aug 1, 2025August 2025 highlights for Ledger Live (LedgerHQ/ledger-live): Key features delivered: - coin-evm: Implemented validateIntent to improve user intent handling and added getSequence to support reliable operation sequencing (commits e8899f0dac12c6ca9c655c121eeb907f6bbad844; 589e0e62092359f48b2a7d22d1d8ecf363ac04b1). - coin-evm: Exposed gasLimit and gasOptions in estimateFees to enable flexible gas parameterization (commit 2834ca443fe9071979d3b506e4ca4fbc17aeca7b). - BridgeApi: Added getTokenFromAsset to map assets to token representations (commit 89fc31e8ecfc5e2fd679a2694b3514f8fb19d7b7). - coin-modules-monitoring: Refactored for robustness (do not stop on failure; can skip currencies) and began populating assetOwner where possible; introduced CI caching for monitor workflows and re-enabled monitoring for icon and sui (commits 8d5abe4d59f7b1ef5d1d495d1ef3e3bf6d95fe4, 75e8028ca a9e23eab47aa629a89b44c6cd6e83a3, 85ebedd01ebc001493f44be82c22d3415d39a32c, 9af40eb449611f043e7fe3de540cda976e49836d). - Testing and observability: Improved Alpaca integration tests for coin-evm and updated coverage tooling; updated Datadog observability domain and codeowners to reflect monitoring scope (commits 6746cf0f61be566026b5d53d2dc648db543354d2; 86a052718eb3c25fe501175887865d9d8f94cf60; 069a303205e4d1b842eacccd12844a841228d26e). Major bugs fixed: - fix(coin-evm): Use toFixed instead of toString when representing coin-evm values to ensure accurate display and calculations (commit cf29b897219b6ea7963decf8e8dc0916cfb087b2). - fix(common): Do not pretend asset balance position in common module, correcting balance reporting (commit e1155b8420f06ead4ab377e16202afdd9133bd26). - fix(coin-modules-monitoring): Set crypto asset store to ensure monitoring starts with correct state (commit 75e8028caa9e23eab47aa629a89b44c6cd6e83a3). - fix(coin-tron): Set transaction type to unknown on staking scenarios to avoid misclassification (commit 19e0b97f12404f0bb857e5430cecf77c7eb128e9). - test(coin-evm): Fix integration tests after estimateFees changes to restore test stability (commit a9a0c18d91cac8d4bb805d558d3d0bd50337d98a). - coin-evm: Revert prior estimateFees parameter adaptation to restore expected behavior while maintaining earlier improvements (commits a3fcd55fdea8c6ffbbb818825382cc96637fe8f5 and 2a4070b594271007fa47dc7451b612008a233006). Overall impact and accomplishments: - Increased reliability and predictability of EVM-related features, improved fee estimation reliability, and stronger observability and incident resilience across monitoring components. - Reduced risk of misreported balances and incorrect transaction types, contributing to higher user trust and fewer support tickets. - Streamlined CI workflows with caching and automated monitoring scheduling, accelerating feedback loops and deployment velocity. Technologies and skills demonstrated: - TypeScript/JavaScript engineering, feature toggling and API evolution (BridgeApi, coin-evm), and adapter-based refactoring. - Robust testing practices: integration and Alpaca tests, CI test setup, and test coverage tooling. - Observability and reliability: Datadog integration, enhanced error metadata, and robust monitoring workflows. - Code quality and maintainability: ESLint rules enforcement, lint cleanups, and codeowners governance.
August 2025
July 2025
23 Commits • 13 Features
Jul 1, 2025July 2025 monthly summary for LedgerHQ/ledger-live focusing on delivering business value through architectural improvements, new capabilities, and improved reliability. Key work included a major refactor of coin-evm architecture, feature improvements across coin-framework/coin-evm with enhanced fee handling, and the launch of monitoring capabilities that bridge live-common with coin modules. The month also saw stabilization of tests and test infrastructure to boost confidence and deployment velocity.
July 2025
23 Commits • 13 Features
Jul 1, 2025July 2025 monthly summary for LedgerHQ/ledger-live focusing on delivering business value through architectural improvements, new capabilities, and improved reliability. Key work included a major refactor of coin-evm architecture, feature improvements across coin-framework/coin-evm with enhanced fee handling, and the launch of monitoring capabilities that bridge live-common with coin modules. The month also saw stabilization of tests and test infrastructure to boost confidence and deployment velocity.
June 2025
12 Commits • 3 Features
Jun 1, 2025June 2025 Ledger Live: Focused on enhancing compatibility, testing depth, and reliability across Solana integration, CAL testing, staking workflows, and data/config maintenance. Delivered tangible business value by aligning Solana app minimum versions with releases, enabling targeted CAL references for testing, extending the coin tester with Solana staking scenarios, fixing a critical UI regression, and stabilizing data endpoints and network configurations across major assets.
12 Commits • 3 Features
Jun 1, 2025June 2025 Ledger Live: Focused on enhancing compatibility, testing depth, and reliability across Solana integration, CAL testing, staking workflows, and data/config maintenance. Delivered tangible business value by aligning Solana app minimum versions with releases, enabling targeted CAL references for testing, extending the coin tester with Solana staking scenarios, fixing a critical UI regression, and stabilizing data endpoints and network configurations across major assets.
June 2025
May 2025
7 Commits • 4 Features
May 1, 2025May 2025 performance summary for LedgerHQ/ledger-live focusing on Solana, Tezos, and testing improvements. Delivered robust token support, improved UX, and refactored architecture to boost maintainability and scalability. Enhanced testing coverage with deterministic scenarios and modular signer components, enabling faster iteration and safer rollouts.
May 2025
7 Commits • 4 Features
May 1, 2025May 2025 performance summary for LedgerHQ/ledger-live focusing on Solana, Tezos, and testing improvements. Delivered robust token support, improved UX, and refactored architecture to boost maintainability and scalability. Enhanced testing coverage with deterministic scenarios and modular signer components, enabling faster iteration and safer rollouts.
April 2025
12 Commits • 4 Features
Apr 1, 2025April 2025 Ledger Live: Focused on reliability, data granularity, and UX improvements across Stellar/Cosmos/Solana integrations. Delivered key features such as token balance granularity, robust operation IDs, and configurable explorer batch sizes; improved test stability, connectivity, and UX warnings; and performed internal refactors to reduce debt and improve maintainability. These changes enable more accurate asset tracking, faster explorer queries, and better risk awareness, supported by cross-module changes and test stabilization.
12 Commits • 4 Features
Apr 1, 2025April 2025 Ledger Live: Focused on reliability, data granularity, and UX improvements across Stellar/Cosmos/Solana integrations. Delivered key features such as token balance granularity, robust operation IDs, and configurable explorer batch sizes; improved test stability, connectivity, and UX warnings; and performed internal refactors to reduce debt and improve maintainability. These changes enable more accurate asset tracking, faster explorer queries, and better risk awareness, supported by cross-module changes and test stabilization.
April 2025
March 2025
8 Commits • 2 Features
Mar 1, 2025March 2025 performance-focused month across Ledger Live. Key outcomes include a user-facing fee-estimation UI enhancement and cross-chain reliability improvements that reduce transaction friction and bolster test stability. Delivered features and fixes across Cosmos, Stellar, Solana, and Ethereum modules to improve user experience, reliability, and performance. Specific deliverables: (1) UI enhancement to display estimated transaction times by fee strategy for Ledger Live mobile, enabling better speed-vs-cost decisions; (2) Solana improvements to account scanning performance and token handling with token-2022 support; (3) Cosmos coin module reliability and API endpoint updates, including refactoring of HTTP calls into the network layer and updated endpoints; (4) Stellar token transaction reliability fixes, including operation ID generation corrections and Hermes typed arrays handling; (5) Ethereum coin tester endpoint update to stabilize tests via an updated node URL. These changes collectively reduce failure rates, improve transaction reliability, and broaden cross-chain support, delivering measurable business value through faster, more reliable user experiences and stronger test coverage.
March 2025
8 Commits • 2 Features
Mar 1, 2025March 2025 performance-focused month across Ledger Live. Key outcomes include a user-facing fee-estimation UI enhancement and cross-chain reliability improvements that reduce transaction friction and bolster test stability. Delivered features and fixes across Cosmos, Stellar, Solana, and Ethereum modules to improve user experience, reliability, and performance. Specific deliverables: (1) UI enhancement to display estimated transaction times by fee strategy for Ledger Live mobile, enabling better speed-vs-cost decisions; (2) Solana improvements to account scanning performance and token handling with token-2022 support; (3) Cosmos coin module reliability and API endpoint updates, including refactoring of HTTP calls into the network layer and updated endpoints; (4) Stellar token transaction reliability fixes, including operation ID generation corrections and Hermes typed arrays handling; (5) Ethereum coin tester endpoint update to stabilize tests via an updated node URL. These changes collectively reduce failure rates, improve transaction reliability, and broaden cross-chain support, delivering measurable business value through faster, more reliable user experiences and stronger test coverage.
February 2025
4 Commits • 2 Features
Feb 1, 2025February 2025 monthly summary for LedgerHQ/ledger-live. Key features delivered: 1) Add Sonic and Sonic Blaze currencies: added currency definitions, updated supported lists, configured networks/explorers, and added tests/snapshots. 2) Standardize coin icon SVG naming: enforce {currency_ticker}.svg naming in coin-evm module documentation. Major bugs fixed: 1) Remove duplicate output in listApps: fix double printing by removing redundant logging in RxJS tap. 2) Ensure test environment cleanup: stop EVM coin tester smoothly by adding --remove-orphans to stop commands in Anvil and Speculos tests. Overall impact: improved CLI reliability and user experience with accurate listApps output; extended currency coverage; more stable test suite reducing flaky failures. Technologies/skills demonstrated: RxJS, observable debugging, currency integration across modules, Docker/test harness management, and documentation standards.
4 Commits • 2 Features
Feb 1, 2025February 2025 monthly summary for LedgerHQ/ledger-live. Key features delivered: 1) Add Sonic and Sonic Blaze currencies: added currency definitions, updated supported lists, configured networks/explorers, and added tests/snapshots. 2) Standardize coin icon SVG naming: enforce {currency_ticker}.svg naming in coin-evm module documentation. Major bugs fixed: 1) Remove duplicate output in listApps: fix double printing by removing redundant logging in RxJS tap. 2) Ensure test environment cleanup: stop EVM coin tester smoothly by adding --remove-orphans to stop commands in Anvil and Speculos tests. Overall impact: improved CLI reliability and user experience with accurate listApps output; extended currency coverage; more stable test suite reducing flaky failures. Technologies/skills demonstrated: RxJS, observable debugging, currency integration across modules, Docker/test harness management, and documentation standards.
February 2025
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Quality Metrics
Correctness91.2%
Maintainability88.6%
Architecture87.0%
Performance84.6%
AI Usage21.4%
Skills & Technologies
Programming Languages
BashJSONJavaScriptMarkdownShellTypeScriptXMLYAMLtsxyaml
Technical Skills
API DesignAPI DevelopmentAPI IntegrationAPI developmentAPI integrationAdapter PatternBackend DevelopmentBlockchainBlockchain DevelopmentBlockchain TechnologyCI/CDCLI DevelopmentCachingCode CleanupCode Maintenance
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