starkware-libs/sequencer
Nov 2024 – Feb 2026
12 Months active
Languages Used
RustJSONPythonCairoAssembly
Technical Skills
CairoGas OptimizationSmart ContractsStarkNetSystem DesignBackend Development
Yonatan-Starkware
PROFILE
Yonatan-starkware
Yonatan Klinger contributed to the starkware-libs/sequencer repository by engineering core features and enhancements for gas cost management, observability, and contract lifecycle handling in the StarkNet sequencing stack. He modernized gas accounting by introducing versioned constants and per-builtin gas costs, refactored resource tracking for clarity, and improved test coverage for built-in cryptographic operations. Using Rust and Cairo, Yonatan implemented alerting systems, metrics integration, and modular CLI tools to streamline debugging and performance analysis. His work on state-backed contract retrieval and reexecution paths reduced production risk and improved maintainability, demonstrating depth in backend development, system design, and blockchain programming.
Overall Statistics
Feature vs Bugs
91%Features
Repository Contributions
53Total
Bugs
2
Commits
53
Features
21
Lines of code
92,236
Activity Months12
Your Network
121 peopleWork History
February 2026
9 Commits • 2 Features
Feb 1, 2026February 2026 monthly summary for starkware-libs/sequencer focusing on feature delivery and codebase enhancements that improve gas accounting, clarity, and maintainability.
9 Commits • 2 Features
Feb 1, 2026February 2026 monthly summary for starkware-libs/sequencer focusing on feature delivery and codebase enhancements that improve gas accounting, clarity, and maintainability.
February 2026
December 2025
2 Commits • 1 Features
Dec 1, 2025December 2025: Delivered core contract class handling enhancements and reexecution performance improvements for the Sequencer. Key outcomes include enabling retrieval of compiled Sierra contract classes from state via the FetchedCompiledClass trait for offline and test readers, and refactoring the reexecution path to use StateReaderAndContractManager for better configuration and faster block reexecution. No formal bug fixes documented this month; primary work focused on feature delivery and reliability. Overall impact: stronger state integration, more deterministic tests, shorter feedback loops and faster releases. Technologies/skills demonstrated: Rust trait implementations, state reader abstractions, refactoring for performance, contract class management, Sierra contract lifecycle.
December 2025
2 Commits • 1 Features
Dec 1, 2025December 2025: Delivered core contract class handling enhancements and reexecution performance improvements for the Sequencer. Key outcomes include enabling retrieval of compiled Sierra contract classes from state via the FetchedCompiledClass trait for offline and test readers, and refactoring the reexecution path to use StateReaderAndContractManager for better configuration and faster block reexecution. No formal bug fixes documented this month; primary work focused on feature delivery and reliability. Overall impact: stronger state integration, more deterministic tests, shorter feedback loops and faster releases. Technologies/skills demonstrated: Rust trait implementations, state reader abstractions, refactoring for performance, contract class management, Sierra contract lifecycle.
November 2025
5 Commits • 3 Features
Nov 1, 2025November 2025 (2025-11) monthly summary for starkware-libs/sequencer. Focused feature delivery that improves testability, observability, and maintenance, with clear business value through faster validation and performance analysis. No major bugs fixed are documented for this period in the provided data; bug fixes, if any, are not captured here.
5 Commits • 3 Features
Nov 1, 2025November 2025 (2025-11) monthly summary for starkware-libs/sequencer. Focused feature delivery that improves testability, observability, and maintenance, with clear business value through faster validation and performance analysis. No major bugs fixed are documented for this period in the provided data; bug fixes, if any, are not captured here.
November 2025
October 2025
4 Commits • 2 Features
Oct 1, 2025Month 2025-10 summary for starkware-libs/sequencer: Focused on improving observability and throughput through instrumentation and performance tuning. Delivered detailed execution metrics and logging for Blockifier transactions, enabling precise monitoring and faster debugging. Fine-tuned gas target and maximum block size to boost transaction throughput and gas efficiency. This work lays the groundwork for better capacity planning and operational visibility across the Sequencer.
October 2025
4 Commits • 2 Features
Oct 1, 2025Month 2025-10 summary for starkware-libs/sequencer: Focused on improving observability and throughput through instrumentation and performance tuning. Delivered detailed execution metrics and logging for Blockifier transactions, enabling precise monitoring and faster debugging. Fine-tuned gas target and maximum block size to boost transaction throughput and gas efficiency. This work lays the groundwork for better capacity planning and operational visibility across the Sequencer.
September 2025
8 Commits • 3 Features
Sep 1, 2025Delivered key enhancements to StarkNet sequencing stack in 2025-09, focusing on test reliability, gas/pricing accuracy, and maintainability. The work reduces production risk, accelerates debugging, and improves predictability of block processing and fee calculations.
8 Commits • 3 Features
Sep 1, 2025Delivered key enhancements to StarkNet sequencing stack in 2025-09, focusing on test reliability, gas/pricing accuracy, and maintainability. The work reduces production risk, accelerates debugging, and improves predictability of block processing and fee calculations.
September 2025
August 2025
7 Commits • 3 Features
Aug 1, 2025In August 2025, the Sequencer repository delivered notable progress across maintenance, native execution path, observability, and correctness. Key efforts included unifying gas cost handling and centralizing gas calculation with a refactor of the test helpers and related structures; enabling OS transaction traces for testing; default enabling Cairo native execution when the cairo_native feature is on; improving monitoring via Blockifier metrics and alerting; and strengthening execution integrity with builtins validation in the Cairo runner. These workstreams reduce risk, accelerate iteration, and improve reliability in production pipelines.
August 2025
7 Commits • 3 Features
Aug 1, 2025In August 2025, the Sequencer repository delivered notable progress across maintenance, native execution path, observability, and correctness. Key efforts included unifying gas cost handling and centralizing gas calculation with a refactor of the test helpers and related structures; enabling OS transaction traces for testing; default enabling Cairo native execution when the cairo_native feature is on; improving monitoring via Blockifier metrics and alerting; and strengthening execution integrity with builtins validation in the Cairo runner. These workstreams reduce risk, accelerate iteration, and improve reliability in production pipelines.
July 2025
5 Commits • 2 Features
Jul 1, 2025Month: 2025-07. Focused on delivering high-impact features, improving observability, and strengthening test reliability to enable safer releases and faster QA cycles for the sequencer repo. This period emphasizes measurable business value through enhanced visibility into execution paths and robust test coverage across Cairo-native flows, plus alignment of ERC20 tests with updated Cairo versions.
5 Commits • 2 Features
Jul 1, 2025Month: 2025-07. Focused on delivering high-impact features, improving observability, and strengthening test reliability to enable safer releases and faster QA cycles for the sequencer repo. This period emphasizes measurable business value through enhanced visibility into execution paths and robust test coverage across Cairo-native flows, plus alignment of ERC20 tests with updated Cairo versions.
July 2025
June 2025
1 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for starkware-libs/sequencer focused on observability and reliability improvements. Delivered a new Blockifier native compilation error alert with metrics and integrated dashboard visibility to accelerate detection and triage of compilation failures, contributing to higher system reliability and faster incident response.
June 2025
1 Commits • 1 Features
Jun 1, 2025June 2025 monthly summary for starkware-libs/sequencer focused on observability and reliability improvements. Delivered a new Blockifier native compilation error alert with metrics and integrated dashboard visibility to accelerate detection and triage of compilation failures, contributing to higher system reliability and faster incident response.
February 2025
2 Commits • 2 Features
Feb 1, 2025February 2025 monthly summary for starkware-libs/sequencer. Focused on gas metering accuracy and test coverage for built-ins. Delivered a range_check96 gas cost constant and wired into BuiltinGasCosts and BuiltinName, plus expanded built-in test coverage to cover bitwise ops, Pedersen/Poseidon hashing, and elliptic curve operations. These changes improve gas accounting accuracy, reduce production risk, and strengthen validation of core built-ins.
2 Commits • 2 Features
Feb 1, 2025February 2025 monthly summary for starkware-libs/sequencer. Focused on gas metering accuracy and test coverage for built-ins. Delivered a range_check96 gas cost constant and wired into BuiltinGasCosts and BuiltinName, plus expanded built-in test coverage to cover bitwise ops, Pedersen/Poseidon hashing, and elliptic curve operations. These changes improve gas accounting accuracy, reduce production risk, and strengthen validation of core built-ins.
February 2025
January 2025
1 Commits
Jan 1, 2025January 2025 (starkware-libs/sequencer): Delivered a focused refactor of gas cost constants within the blockifier to streamline gas cost management and improve test accuracy. This work reduced complexity in os_constants by removing syscall gas costs, and updated related tests to reflect the new gas cost model. The refactor was implemented with a single commit, enabling clearer maintenance and better alignment with production expectations.
January 2025
1 Commits
Jan 1, 2025January 2025 (starkware-libs/sequencer): Delivered a focused refactor of gas cost constants within the blockifier to streamline gas cost management and improve test accuracy. This work reduced complexity in os_constants by removing syscall gas costs, and updated related tests to reflect the new gas cost model. The refactor was implemented with a single commit, enabling clearer maintenance and better alignment with production expectations.
December 2024
7 Commits • 1 Features
Dec 1, 2024December 2024 performance summary: Implemented gas cost model modernization and versioned constants support in the Sequencer, including per-builtin gas costs (Keccak, ECDSA), separation of builtin vs base costs, centralized syscall costs, and deserialization for VersionedConstants with defaults; removed legacy fee_transfer_gas_cost field. This foundation enables versioned gas governance, safer upgrades, and improved pricing predictability for on-chain operations.
7 Commits • 1 Features
Dec 1, 2024December 2024 performance summary: Implemented gas cost model modernization and versioned constants support in the Sequencer, including per-builtin gas costs (Keccak, ECDSA), separation of builtin vs base costs, centralized syscall costs, and deserialization for VersionedConstants with defaults; removed legacy fee_transfer_gas_cost field. This foundation enables versioned gas governance, safer upgrades, and improved pricing predictability for on-chain operations.
December 2024
November 2024
2 Commits • 1 Features
Nov 1, 2024Delivered gas costs management enhancements for built-ins and syscalls in the Sequencer, including retrieval methods in GasCosts with error handling for unsupported/deprecated operations, and the introduction of VersionedConstants.get_syscall_gas_cost to compute syscall gas costs from execution resources and base costs; added tests for syscall gas cost calculation.
November 2024
2 Commits • 1 Features
Nov 1, 2024Delivered gas costs management enhancements for built-ins and syscalls in the Sequencer, including retrieval methods in GasCosts with error handling for unsupported/deprecated operations, and the introduction of VersionedConstants.get_syscall_gas_cost to compute syscall gas costs from execution resources and base costs; added tests for syscall gas cost calculation.
Activity
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Quality Metrics
Correctness92.6%
Maintainability88.8%
Architecture89.4%
Performance83.4%
AI Usage24.6%
Skills & Technologies
Programming Languages
AssemblyCairoJSONPythonRust
Technical Skills
API integrationAlerting SystemsBackend DevelopmentBlockchain DevelopmentCLI DevelopmentCairoCairo DevelopmentCairo VMCode CleanupCode OrganizationCode RefactoringConfiguration ManagementCryptographyError HandlingGas Management
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