starkware-libs/sequencer
Oct 2024 – Mar 2026
17 Months active
Languages Used
RustPythonSolidityYAMLCairoTOMLDockerfilecairo
Technical Skills
Backend DevelopmentCairoPerformance OptimizationRustSmart ContractsTesting
avivg-starkware
PROFILE
Avivg-starkware
Aviv Gafni contributed extensively to the starkware-libs/sequencer repository, building and refining core components for StarkNet’s transaction execution, gas accounting, and proof integration. He engineered robust resource estimation and gas modeling systems, leveraging Rust and Cairo to improve accuracy and reliability in on-chain workflows. Aviv’s work included developing trait-based resource estimators, enhancing API and backend integration, and implementing concurrency-safe proof propagation across the stack. He addressed complex challenges in gas optimization, bytecode segmentation, and cross-version compatibility, consistently expanding test coverage and documentation. His engineering demonstrated depth in system design, blockchain development, and performance tuning, resulting in maintainable, scalable infrastructure.
Overall Statistics
Feature vs Bugs
83%Features
Repository Contributions
310Total
Bugs
19
Commits
310
Features
92
Lines of code
127,036
Activity Months17
Your Network
121 peopleWork History
March 2026
18 Commits • 3 Features
Mar 1, 2026March 2026 monthly summary focusing on key accomplishments for the starkware-libs/sequencer repository. Key features delivered include Opcode tracking and extended resource management for StarkNet OS, enabling precise opcode counting (Blake opcodes) and extending resource estimation for better gas modeling and resource governance. Additional feature work strengthened transaction-proof testing and serialization, and implemented proof format and compatibility upgrades to support scalable proof systems. Major update areas also included a rollback of the mock RPC testing pathway to restore stable CI and validation workflows.
18 Commits • 3 Features
Mar 1, 2026March 2026 monthly summary focusing on key accomplishments for the starkware-libs/sequencer repository. Key features delivered include Opcode tracking and extended resource management for StarkNet OS, enabling precise opcode counting (Blake opcodes) and extending resource estimation for better gas modeling and resource governance. Additional feature work strengthened transaction-proof testing and serialization, and implemented proof format and compatibility upgrades to support scalable proof systems. Major update areas also included a rollback of the mock RPC testing pathway to restore stable CI and validation workflows.
March 2026
February 2026
28 Commits • 7 Features
Feb 1, 2026February 2026: Focused on strengthening compatibility, resource accounting, and client integration, delivering larger proof support, unified ExtendedExecutionResources, and test coverage improvements. Major features include Apollo storage backward compatibility with tests, Apollo gateway max_proof_size update, Blockifier ExtendedExecutionResources integration with gas/proof improvements, and cross-component ExtendedExecutionResources support across core execution paths. Fixed client-side proving regressions and performed targeted cleanup to improve maintainability. These efforts enhance reliability, scalability, and cost visibility for StarkNet/Cairo workloads, enabling more efficient block processing, gas estimation, and proof generation across the sequencer stack.
February 2026
28 Commits • 7 Features
Feb 1, 2026February 2026: Focused on strengthening compatibility, resource accounting, and client integration, delivering larger proof support, unified ExtendedExecutionResources, and test coverage improvements. Major features include Apollo storage backward compatibility with tests, Apollo gateway max_proof_size update, Blockifier ExtendedExecutionResources integration with gas/proof improvements, and cross-component ExtendedExecutionResources support across core execution paths. Fixed client-side proving regressions and performed targeted cleanup to improve maintainability. These efforts enhance reliability, scalability, and cost visibility for StarkNet/Cairo workloads, enabling more efficient block processing, gas estimation, and proof generation across the sequencer stack.
January 2026
37 Commits • 20 Features
Jan 1, 2026January 2026 monthly summary for starkware-libs/sequencer. Key emphasis this month was to consolidate internal RPC transaction handling, extend proof-related capabilities across the gateway and transaction stack, and improve test coverage and documentation to support client-side proving and future-proof transaction formats. The work aligns with business goals of reducing payload complexity, improving reliability of internal RPC flows, and enabling more robust client-side proving scenarios.
37 Commits • 20 Features
Jan 1, 2026January 2026 monthly summary for starkware-libs/sequencer. Key emphasis this month was to consolidate internal RPC transaction handling, extend proof-related capabilities across the gateway and transaction stack, and improve test coverage and documentation to support client-side proving and future-proof transaction formats. The work aligns with business goals of reducing payload complexity, improving reliability of internal RPC flows, and enabling more robust client-side proving scenarios.
January 2026
December 2025
24 Commits • 8 Features
Dec 1, 2025December 2025 monthly summary: Implemented end-to-end proof and proof_facts support across the StarkNet API, Apollo stack, and client ecosystems, with concurrency-safe data sharing and hardened backward compatibility. Expanded testing coverage with default proof fields and testing macros, enabling robust validation of proof flows across components. This work directly improves end-to-end verification, cross-component consistency, and developer productivity by providing reliable proof propagation from API surfaces to clients and tests.
December 2025
24 Commits • 8 Features
Dec 1, 2025December 2025 monthly summary: Implemented end-to-end proof and proof_facts support across the StarkNet API, Apollo stack, and client ecosystems, with concurrency-safe data sharing and hardened backward compatibility. Expanded testing coverage with default proof fields and testing macros, enabling robust validation of proof flows across components. This work directly improves end-to-end verification, cross-component consistency, and developer productivity by providing reliable proof propagation from API surfaces to clients and tests.
November 2025
4 Commits • 2 Features
Nov 1, 2025Month: 2025-11 | Repository: starkware-libs/sequencer Key features delivered: - Blockifier Gas Cost Model Tuning: Updated gas costs for built-in operations and adjusted gas weights for Blake and Pedersen in the blockifier to improve performance and resource allocation. This enhances throughput predictability and resource provisioning. - Maintenance and Documentation Updates: Upgraded cairo-native dependency to 0.7.2 and clarified is_declared documentation to explain behavior across Cairo 0 and Cairo 1 classes, improving cross-version clarity and onboarding. Major bugs fixed: - No major defects closed this month. Focused on performance tuning, dependency maintenance, and documentation improvements to reduce risk and improve stability. Overall impact and accomplishments: - Improved execution efficiency and resource utilization in the sequencer's blockifier, translating to better throughput and stable gas budgeting. - Reduced upgrade risk and improved maintainability via dependency updates and clearer cross-version Cairo guidance, contributing to smoother future migrations. - Strengthened developer experience with updated docs and commit-level traceability. Technologies/skills demonstrated: - Gas cost modeling and performance optimization in blockchain components. - Resource allocation tuning through gas weight adjustments. - Dependency management and native integration (cairo-native) with cross-version Cairo 0/1 guidance. - Clear, traceable communicate-and-documentation practices for engineering work.
4 Commits • 2 Features
Nov 1, 2025Month: 2025-11 | Repository: starkware-libs/sequencer Key features delivered: - Blockifier Gas Cost Model Tuning: Updated gas costs for built-in operations and adjusted gas weights for Blake and Pedersen in the blockifier to improve performance and resource allocation. This enhances throughput predictability and resource provisioning. - Maintenance and Documentation Updates: Upgraded cairo-native dependency to 0.7.2 and clarified is_declared documentation to explain behavior across Cairo 0 and Cairo 1 classes, improving cross-version clarity and onboarding. Major bugs fixed: - No major defects closed this month. Focused on performance tuning, dependency maintenance, and documentation improvements to reduce risk and improve stability. Overall impact and accomplishments: - Improved execution efficiency and resource utilization in the sequencer's blockifier, translating to better throughput and stable gas budgeting. - Reduced upgrade risk and improved maintainability via dependency updates and clearer cross-version Cairo guidance, contributing to smoother future migrations. - Strengthened developer experience with updated docs and commit-level traceability. Technologies/skills demonstrated: - Gas cost modeling and performance optimization in blockchain components. - Resource allocation tuning through gas weight adjustments. - Dependency management and native integration (cairo-native) with cross-version Cairo 0/1 guidance. - Clear, traceable communicate-and-documentation practices for engineering work.
November 2025
September 2025
17 Commits • 1 Features
Sep 1, 20252025-09 monthly summary for starkware-libs/sequencer: Focused on enhancing block processing efficiency and migration readiness through a major overhaul of Blockifier CASM hash estimation and resource accounting, coupled with migration/resource estimation refactors and expanded test coverage. The work strengthens reliability, performance, and business value by delivering more accurate gas accounting, enabling safer contract migrations, and improving test hygiene across CASM/resource pathways.
September 2025
17 Commits • 1 Features
Sep 1, 20252025-09 monthly summary for starkware-libs/sequencer: Focused on enhancing block processing efficiency and migration readiness through a major overhaul of Blockifier CASM hash estimation and resource accounting, coupled with migration/resource estimation refactors and expanded test coverage. The work strengthens reliability, performance, and business value by delivering more accurate gas accounting, enabling safer contract migrations, and improving test hygiene across CASM/resource pathways.
August 2025
42 Commits • 13 Features
Aug 1, 2025August 2025 (2025-08) monthly summary for starkware-libs/sequencer: major enhancements centered on Blake hashing, bytecode management, nested data structures, and resource estimation, complemented by expanded testing and StarkNet OS coverage. Key features delivered include Blake opcode gas configuration and hashing estimation (bouncer_config integration and felt-size-based CASM hash estimation); bytecode segmentation utilities and contract_class_v1 enhancements (create_bytecode_seg_inner and bytecode_segment_felt_sizes); support for nested_multiple_int_list and hashable nested types; a new Execution Resources Estimation framework with trait-based estimators and conversions between estimated resources and resource registers; and trait-based resource estimation consolidation with unified encoding paths and improved exposure of estimated resources. Major bugs fixed: removal of remaining test todos and adjustments to Blake gas accounting (fixing single Blake opcode gas weight) to improve test reliability and gas cost accuracy. Overall impact and accomplishments: these changes deliver more accurate gas and resource budgeting, improved deployment packaging via bytecode segmentation, and stronger testing coverage, enabling safer deployments and faster iterations toward performance optimizations. The work demonstrates strong command of Rust abstractions (traits and generics), resource estimation workflows, and end-to-end testing integration (including StarkNet OS scenarios). Technologies/skills demonstrated: Rust/Crate design, trait-based resource estimation, felt-count based hashing and encoding paths, CASM hash estimation, and OS-level testing coverage (v2hash and test cases).
42 Commits • 13 Features
Aug 1, 2025August 2025 (2025-08) monthly summary for starkware-libs/sequencer: major enhancements centered on Blake hashing, bytecode management, nested data structures, and resource estimation, complemented by expanded testing and StarkNet OS coverage. Key features delivered include Blake opcode gas configuration and hashing estimation (bouncer_config integration and felt-size-based CASM hash estimation); bytecode segmentation utilities and contract_class_v1 enhancements (create_bytecode_seg_inner and bytecode_segment_felt_sizes); support for nested_multiple_int_list and hashable nested types; a new Execution Resources Estimation framework with trait-based estimators and conversions between estimated resources and resource registers; and trait-based resource estimation consolidation with unified encoding paths and improved exposure of estimated resources. Major bugs fixed: removal of remaining test todos and adjustments to Blake gas accounting (fixing single Blake opcode gas weight) to improve test reliability and gas cost accuracy. Overall impact and accomplishments: these changes deliver more accurate gas and resource budgeting, improved deployment packaging via bytecode segmentation, and stronger testing coverage, enabling safer deployments and faster iterations toward performance optimizations. The work demonstrates strong command of Rust abstractions (traits and generics), resource estimation workflows, and end-to-end testing integration (including StarkNet OS scenarios). Technologies/skills demonstrated: Rust/Crate design, trait-based resource estimation, felt-count based hashing and encoding paths, CASM hash estimation, and OS-level testing coverage (v2hash and test cases).
August 2025
July 2025
25 Commits • 10 Features
Jul 1, 2025July 2025 monthly summary for starkware-libs/sequencer focusing on Blockifier enhancements, migration hash propagation, and Blake hash estimation improvements. Delivered refactors and algorithms that improve execution transparency, cost modeling, and cross-system migration reliability. Strengthened testing coverage and cross-repo consistency, enabling safer deployments and better cost-to-performance planning.
July 2025
25 Commits • 10 Features
Jul 1, 2025July 2025 monthly summary for starkware-libs/sequencer focusing on Blockifier enhancements, migration hash propagation, and Blake hash estimation improvements. Delivered refactors and algorithms that improve execution transparency, cost modeling, and cross-system migration reliability. Strengthened testing coverage and cross-repo consistency, enabling safer deployments and better cost-to-performance planning.
June 2025
14 Commits • 1 Features
Jun 1, 2025June 2025 summary for starkware-libs/sequencer: Major Blockifier gas accounting and resource estimation enhancements, plus deployment-builtin weights bug fixes, delivering improved accuracy, reliability, and visibility in gas costs and resource usage. This period focused on delivering features to improve gas estimation, error handling, and config wiring, with targeted fixes to deployment and builtin weights to stabilize the base app config.
14 Commits • 1 Features
Jun 1, 2025June 2025 summary for starkware-libs/sequencer: Major Blockifier gas accounting and resource estimation enhancements, plus deployment-builtin weights bug fixes, delivering improved accuracy, reliability, and visibility in gas costs and resource usage. This period focused on delivering features to improve gas estimation, error handling, and config wiring, with targeted fixes to deployment and builtin weights to stabilize the base app config.
June 2025
May 2025
4 Commits • 1 Features
May 1, 2025May 2025 monthly summary for starkware-libs/sequencer. Focused on delivering code clarity improvements and robust gas accounting to support higher throughput and reduce transaction failures. Key outcomes include a code clarity improvement through renaming reject_selector_in_validate_mode to reject_syscall_in_validate_mode, and critical L1/L2 gas fixes that correct L2 gas calculations in l1_handler_max_amount_bounds and increase gas limits to support larger L1/L2 handler operations. These changes enhance maintainability, reliability, and performance for on-chain validation and sequencing workflows, enabling larger L1 handler operations and fewer failed transactions.
May 2025
4 Commits • 1 Features
May 1, 2025May 2025 monthly summary for starkware-libs/sequencer. Focused on delivering code clarity improvements and robust gas accounting to support higher throughput and reduce transaction failures. Key outcomes include a code clarity improvement through renaming reject_selector_in_validate_mode to reject_syscall_in_validate_mode, and critical L1/L2 gas fixes that correct L2 gas calculations in l1_handler_max_amount_bounds and increase gas limits to support larger L1/L2 handler operations. These changes enhance maintainability, reliability, and performance for on-chain validation and sequencing workflows, enabling larger L1 handler operations and fewer failed transactions.
April 2025
30 Commits • 9 Features
Apr 1, 2025April 2025 performance summary for starkware-libs/sequencer. Delivered robust state-access primitives, hardened validation controls, and expanded Cairo-native testing. Key outcomes include enhancements to state reading and contract management, stricter validation for deployment and code-share interactions, and greater testing coverage across Cairo-native paths and Sierra compilation.
30 Commits • 9 Features
Apr 1, 2025April 2025 performance summary for starkware-libs/sequencer. Delivered robust state-access primitives, hardened validation controls, and expanded Cairo-native testing. Key outcomes include enhancements to state reading and contract management, stricter validation for deployment and code-share interactions, and greater testing coverage across Cairo-native paths and Sierra compilation.
April 2025
March 2025
6 Commits • 3 Features
Mar 1, 2025March 2025 performance summary for starkware-libs/sequencer focused on strengthening execution control, resource governance, and fee integrity across the runtime and blockifier. Delivered whitelist-based Cairo native execution, enhanced L1 handler resource bounds, added a CASM compilation memory limit, and fixed concurrency-related fee enforcement.
March 2025
6 Commits • 3 Features
Mar 1, 2025March 2025 performance summary for starkware-libs/sequencer focused on strengthening execution control, resource governance, and fee integrity across the runtime and blockifier. Delivered whitelist-based Cairo native execution, enhanced L1 handler resource bounds, added a CASM compilation memory limit, and fixed concurrency-related fee enforcement.
February 2025
13 Commits • 4 Features
Feb 1, 2025February 2025 monthly summary for starkware-libs/sequencer: delivered key features, fixed critical bugs, and expanded test/benchmark coverage, driving state transparency, correctness, and performance improvements across the execution pipeline.
13 Commits • 4 Features
Feb 1, 2025February 2025 monthly summary for starkware-libs/sequencer: delivered key features, fixed critical bugs, and expanded test/benchmark coverage, driving state transparency, correctness, and performance improvements across the execution pipeline.
February 2025
January 2025
6 Commits • 1 Features
Jan 1, 2025January 2025 monthly summary for starkware-libs/sequencer focused on robustness, test coverage, and build-time efficiency for Native Cairo execution in Blockifier. Delivered a consolidated set of changes aimed at reliability, scalability, and maintainability, enabling safer deployments and faster iteration cycles in production environments.
January 2025
6 Commits • 1 Features
Jan 1, 2025January 2025 monthly summary for starkware-libs/sequencer focused on robustness, test coverage, and build-time efficiency for Native Cairo execution in Blockifier. Delivered a consolidated set of changes aimed at reliability, scalability, and maintainability, enabling safer deployments and faster iteration cycles in production environments.
December 2024
18 Commits • 3 Features
Dec 1, 2024December 2024 highlights for starkware-libs/sequencer: delivered a major Blockifier overhaul with a safety-focused refactor, streamlined transaction handling, and enhanced test infrastructure. Key changes reduce developer friction, improve reliability, and enable safer gas accounting and sequencing workflows, paving the way for easier future extensions and integrations. Core outcomes include simplified Blockifier transaction flows, safer gas accounting with clearer metrics, and modernized test utilities.
18 Commits • 3 Features
Dec 1, 2024December 2024 highlights for starkware-libs/sequencer: delivered a major Blockifier overhaul with a safety-focused refactor, streamlined transaction handling, and enhanced test infrastructure. Key changes reduce developer friction, improve reliability, and enable safer gas accounting and sequencing workflows, paving the way for easier future extensions and integrations. Core outcomes include simplified Blockifier transaction flows, safer gas accounting with clearer metrics, and modernized test utilities.
December 2024
November 2024
20 Commits • 4 Features
Nov 1, 2024In 2024-11, the Sequencer repo delivered foundational API alignment and targeted refactors that improve reliability, maintainability, and business value across Starknet integration points. Key achievements include unifying executable transaction handling for the Starknet API and integrating it with AccountTransaction, aligning internal representations with the external API, expanding Sierra class management with storage and config, and sweeping internal refactors to reduce duplication and streamline code paths.
November 2024
20 Commits • 4 Features
Nov 1, 2024In 2024-11, the Sequencer repo delivered foundational API alignment and targeted refactors that improve reliability, maintainability, and business value across Starknet integration points. Key achievements include unifying executable transaction handling for the Starknet API and integrating it with AccountTransaction, aligning internal representations with the external API, expanding Sierra class management with storage and config, and sweeping internal refactors to reduce duplication and streamline code paths.
October 2024
4 Commits • 2 Features
Oct 1, 2024Monthly summary for 2024-10 (starkware-libs/sequencer): Focused delivery in Blockifier to improve correctness, reliability, and resource accounting. Implemented fee-handling refinements and CASM alignment with dynamic execution path, supported by targeted tests. These changes reduce risk around transaction fee enforcement, improve resource tracking accuracy, and lay groundwork for CASM-dominated execution paths.
4 Commits • 2 Features
Oct 1, 2024Monthly summary for 2024-10 (starkware-libs/sequencer): Focused delivery in Blockifier to improve correctness, reliability, and resource accounting. Implemented fee-handling refinements and CASM alignment with dynamic execution path, supported by targeted tests. These changes reduce risk around transaction fee enforcement, improve resource tracking accuracy, and lay groundwork for CASM-dominated execution paths.
October 2024
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Quality Metrics
Correctness91.8%
Maintainability88.8%
Architecture89.0%
Performance84.0%
AI Usage22.8%
Skills & Technologies
Programming Languages
CairoDockerfileJSONProtobufPythonRustSolidityTOMLUnknownYAML
Technical Skills
API DesignAPI DevelopmentAPI ImplementationAPI IntegrationAPI designAPI developmentAPI documentationAPI integrationAPI testingArithmetic OperationsBackend DevelopmentBenchmarkingBlockchainBlockchain DevelopmentBlockifier
Repositories Contributed To
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