ZcashFoundation/zebra
Nov 2024 – Feb 2026
14 Months active
Languages Used
MarkdownRustYAMLJSONShellTOMLPythonplaintext
Technical Skills
DocumentationRelease ManagementBlockchainDebuggingError HandlingRPC
Conrado
PROFILE
Conrado
Conrado developed and maintained core blockchain infrastructure in the ZcashFoundation/zebra repository, delivering features that enhanced RPC capabilities, consensus validation, and network reliability. He engineered robust Rust-based APIs for transaction processing, serialization, and cross-chain data retrieval, while optimizing performance and error handling throughout the backend. His work included protocol upgrades, release management, and CI/CD improvements, ensuring stable deployments and reproducible builds. Conrado addressed data integrity and interoperability by aligning RPC schemas with upstream standards and refining test infrastructure using Docker and YAML. His contributions demonstrated depth in Rust, backend development, and DevOps, resulting in a maintainable, production-ready blockchain codebase.
Overall Statistics
Feature vs Bugs
79%Features
Repository Contributions
53Total
Bugs
7
Commits
53
Features
26
Lines of code
26,636
Activity Months14
Your Network
38 peopleWork History
February 2026
2 Commits • 1 Features
Feb 1, 2026February 2026 monthly summary for ZcashFoundation/zebra focused on CI and test workflow improvements to stabilize, speed, and scale CI. Delivered updated Rust MSRV, enabled CI-wide testing, hardened test-docker workflow, and optimized CI builds by crate-level execution and selective zebrad skipping.
2 Commits • 1 Features
Feb 1, 2026February 2026 monthly summary for ZcashFoundation/zebra focused on CI and test workflow improvements to stabilize, speed, and scale CI. Delivered updated Rust MSRV, enabled CI-wide testing, hardened test-docker workflow, and optimized CI builds by crate-level execution and selective zebrad skipping.
February 2026
January 2026
4 Commits • 2 Features
Jan 1, 2026January 2026 monthly performance summary for ZcashFoundation/zebra focusing on release readiness, telemetry improvements, and blockchain validation data richness. Efforts centered on stabilizing the upcoming 4.0.0 release, boosting observability, and improving synchronization accuracy for faster, more reliable deployments.
January 2026
4 Commits • 2 Features
Jan 1, 2026January 2026 monthly performance summary for ZcashFoundation/zebra focusing on release readiness, telemetry improvements, and blockchain validation data richness. Efforts centered on stabilizing the upcoming 4.0.0 release, boosting observability, and improving synchronization accuracy for faster, more reliable deployments.
December 2025
1 Commits
Dec 1, 2025December 2025: Delivering an important RPC stability improvement in Zebra by aligning GetInfoResponse error timestamps with zcashd, reducing timestamp inconsistencies across services and improving cross-system interoperability.
1 Commits
Dec 1, 2025December 2025: Delivering an important RPC stability improvement in Zebra by aligning GetInfoResponse error timestamps with zcashd, reducing timestamp inconsistencies across services and improving cross-system interoperability.
December 2025
November 2025
5 Commits • 2 Features
Nov 1, 2025November 2025 — Zebra (ZcashFoundation/zebra) delivered key protocol, debugging, and CI/build improvements that enhance stability, observability, and deployment confidence. Highlights include implementing the Zcash Version 6 Transactions Gate behind the unstable nu7 flag to preserve protocol compatibility during evolution (commit 48669fd6280f6306435008460f9b16bdd51f9377); strengthening test reliability by ensuring wallets are closed on exit and suppressing an EoS warning that caused flaky tests (commits e6147db272a4b1adc77a218c4c42098063aec33b and 7e58fb5006e28f97f924d042f2bd7768777229ce); enhancing Zebrad debugging with always-on backtraces and a user override (commit 9e0f9b406a54277cc8726e729f68805ed9aaaa33); and hardening the build process by making VERGEN logging robust when the .git directory or environment vars are missing (commit e469feb6d0d1b88a0951d6719d1b6b94e69cce81).
November 2025
5 Commits • 2 Features
Nov 1, 2025November 2025 — Zebra (ZcashFoundation/zebra) delivered key protocol, debugging, and CI/build improvements that enhance stability, observability, and deployment confidence. Highlights include implementing the Zcash Version 6 Transactions Gate behind the unstable nu7 flag to preserve protocol compatibility during evolution (commit 48669fd6280f6306435008460f9b16bdd51f9377); strengthening test reliability by ensuring wallets are closed on exit and suppressing an EoS warning that caused flaky tests (commits e6147db272a4b1adc77a218c4c42098063aec33b and 7e58fb5006e28f97f924d042f2bd7768777229ce); enhancing Zebrad debugging with always-on backtraces and a user override (commit 9e0f9b406a54277cc8726e729f68805ed9aaaa33); and hardening the build process by making VERGEN logging robust when the .git directory or environment vars are missing (commit e469feb6d0d1b88a0951d6719d1b6b94e69cce81).
October 2025
1 Commits
Oct 1, 2025Monthly summary for 2025-10: Zebra (ZcashFoundation/zebra) focused on network reliability improvements via seeders cleanup. Removed outdated seeders from default mainnet and testnet configuration to exclude invalid endpoints, ensuring the node connects to current, reliable peers and improves peer discovery. The change reduces failed handshakes and stabilizes initial sync times across environments. Implemented via commit d60923f61a2eba07f273a3bfa31d63f667bd053f (network: removed outdated seeders; update test config). Collaboration with automated reviewer merges (co-authored-by: mergify[bot]).
1 Commits
Oct 1, 2025Monthly summary for 2025-10: Zebra (ZcashFoundation/zebra) focused on network reliability improvements via seeders cleanup. Removed outdated seeders from default mainnet and testnet configuration to exclude invalid endpoints, ensuring the node connects to current, reliable peers and improves peer discovery. The change reduces failed handshakes and stabilizes initial sync times across environments. Implemented via commit d60923f61a2eba07f273a3bfa31d63f667bd053f (network: removed outdated seeders; update test config). Collaboration with automated reviewer merges (co-authored-by: mergify[bot]).
October 2025
September 2025
10 Commits • 2 Features
Sep 1, 2025September 2025 monthly summary for ZcashFoundation/zebra focusing on delivering cross-chain RPC capabilities, stabilizing CI, and maintenance. Key outcomes include expanded cross-chain RPC for UTXOs, node management improvements, and side-chain support; improved test reliability and CI stability; and ongoing documentation/maintenance to keep the repository clean and up-to-date. These efforts reduce integration risk, accelerate cross-chain workflows, and improve overall code quality and developer velocity.
September 2025
10 Commits • 2 Features
Sep 1, 2025September 2025 monthly summary for ZcashFoundation/zebra focusing on delivering cross-chain RPC capabilities, stabilizing CI, and maintenance. Key outcomes include expanded cross-chain RPC for UTXOs, node management improvements, and side-chain support; improved test reliability and CI stability; and ongoing documentation/maintenance to keep the repository clean and up-to-date. These efforts reduce integration risk, accelerate cross-chain workflows, and improve overall code quality and developer velocity.
August 2025
8 Commits • 4 Features
Aug 1, 2025August 2025 (Zebra repo) – concise monthly summary focused on delivering business value through feature delivery, reliability improvements, and diagnostics enhancements. Key features delivered: - Multi-stream funding support and subsidy structure upgrade: introduced support for multiple arbitrary funding streams per network, updated data structures and logic, ensured compatibility with upgrade rules, and improved subsidy distribution flexibility. - NU6.1 network activation and 2.0 release changes: release-oriented changes including 2.0.0 release notes, network activation for NU6.1 testnet, and updates to subsidy parameters, funding stream configurations, and RPC response fields. - CI/testing infrastructure overhaul for new network activation/test configuration: new Docker test jobs, removal of fake activation heights, enables network overrides and custom ledger strategies for regtest/custom networks, centralizes network parameter management. - RPC layer enhancements for Sapling/JoinSplit/Orchard data exposure: exposed Sapling tree state, Sprout JoinSplit data, and Orchard transaction fields via z_gettreestate, getrawtransaction, and related data structures; several compatibility and snapshot updates. Major bugs fixed and quality improvements: - Stabilized CI/test runs by addressing docker config issues and moving tests to regtest, reducing flaky test outcomes and enabling deterministic validation (#9777, #9792). - RPC correctness improvements: fixed byte order issues in z_gettreestate, refined Sprout data handling, added vjoinsplit field to getrawtransaction, and ensured Orchard fields are correctly exposed (#9798, #9805, #9808). - Test and data integrity updates: updated tests and snapshots to reflect new RPC schemas and network activation parameters. Overall impact and accomplishments: - Strengthened release readiness for NU6.1/2.0 with robust activation, clear release notes, and configurable funding streams. - Improved observability and integration points for wallets and tooling through expanded RPC surface and stable test infrastructure. - Reduced risk of flaky CI, reduced maintenance overhead through centralized parameter management, and faster, more reliable deployments. Technologies/skills demonstrated: - Rust code updates, data structure evolution, and upgrade-rule compatibility logic. - CI/CD, Docker, regtest/test configuration, and test orchestration. - RPC surface design and data serialization, including Sapling/JoinSplit/Orchard data exposure and field changes.
8 Commits • 4 Features
Aug 1, 2025August 2025 (Zebra repo) – concise monthly summary focused on delivering business value through feature delivery, reliability improvements, and diagnostics enhancements. Key features delivered: - Multi-stream funding support and subsidy structure upgrade: introduced support for multiple arbitrary funding streams per network, updated data structures and logic, ensured compatibility with upgrade rules, and improved subsidy distribution flexibility. - NU6.1 network activation and 2.0 release changes: release-oriented changes including 2.0.0 release notes, network activation for NU6.1 testnet, and updates to subsidy parameters, funding stream configurations, and RPC response fields. - CI/testing infrastructure overhaul for new network activation/test configuration: new Docker test jobs, removal of fake activation heights, enables network overrides and custom ledger strategies for regtest/custom networks, centralizes network parameter management. - RPC layer enhancements for Sapling/JoinSplit/Orchard data exposure: exposed Sapling tree state, Sprout JoinSplit data, and Orchard transaction fields via z_gettreestate, getrawtransaction, and related data structures; several compatibility and snapshot updates. Major bugs fixed and quality improvements: - Stabilized CI/test runs by addressing docker config issues and moving tests to regtest, reducing flaky test outcomes and enabling deterministic validation (#9777, #9792). - RPC correctness improvements: fixed byte order issues in z_gettreestate, refined Sprout data handling, added vjoinsplit field to getrawtransaction, and ensured Orchard fields are correctly exposed (#9798, #9805, #9808). - Test and data integrity updates: updated tests and snapshots to reflect new RPC schemas and network activation parameters. Overall impact and accomplishments: - Strengthened release readiness for NU6.1/2.0 with robust activation, clear release notes, and configurable funding streams. - Improved observability and integration points for wallets and tooling through expanded RPC surface and stable test infrastructure. - Reduced risk of flaky CI, reduced maintenance overhead through centralized parameter management, and faster, more reliable deployments. Technologies/skills demonstrated: - Rust code updates, data structure evolution, and upgrade-rule compatibility logic. - CI/CD, Docker, regtest/test configuration, and test orchestration. - RPC surface design and data serialization, including Sapling/JoinSplit/Orchard data exposure and field changes.
August 2025
July 2025
7 Commits • 4 Features
Jul 1, 2025July 2025 performance summary for Zebra (ZcashFoundation/zebra). Delivered a targeted set of reliability improvements and releases, including a critical bug fix in Sapling serialization, removal of deprecated crates to simplify maintenance, and a focused release train (2.4.x) that strengthens upgrade paths and recovery guidance. The work enhances RPC data integrity, reduces maintenance surface, and improves operator readiness for upgrades.
July 2025
7 Commits • 4 Features
Jul 1, 2025July 2025 performance summary for Zebra (ZcashFoundation/zebra). Delivered a targeted set of reliability improvements and releases, including a critical bug fix in Sapling serialization, removal of deprecated crates to simplify maintenance, and a focused release train (2.4.x) that strengthens upgrade paths and recovery guidance. The work enhances RPC data integrity, reduces maintenance surface, and improves operator readiness for upgrades.
June 2025
8 Commits • 6 Features
Jun 1, 2025Month: 2025-06 — Zebra (ZcashFoundation/zebra) performance-focused update highlighting RPC improvements, value-pool visibility, and consensus optimizations. Business value achieved includes richer client data, more reliable RPC results, improved block validation efficiency, and cleaner API surfaces for maintainers and downstream integrations. Key features delivered: - RPC Deserialization Enhancements and Tests: RPC layer now deserializes NoteCommitmentSubtreeData, GetSubtrees, Treestate, and Commitments; error handling in get_block_template refactored; JsonParameters/Response handling tightened; extensive serialization/deserialization tests added. Commit: f748d3781cb68d5a1d6b49e9eb42506467668125. - Getrawtransaction RPC Improvements: Added fields (txid, overwintered, version, version_group_id, lock_time, expiry_height, block_hash, block_time); optional block_hash support; improved hex deserialization; txid reuse in TransactionObject for efficiency. Commits: 7c4d8f09bcc8e6d9170edf2b1e9456adacb933b0; a20692e5545cd7d6d7f575b8e3d2f0d4169f611c. - Getblock RPC Enhancement with Value Pool: getblock now includes value pool information; introduces BlockInfo struct to store block details and computes chain supply and value pool balances including deltas. Commit: 9caa717d9547985c8ff47784ee77ff27758d6740. - RPC API Cleanup and API Surface Flattening: RPC API refactor to clean types, remove unnecessary responses, and re-export types to flatten the API; documentation updates and clippy warnings addressed. Commit: 63523aabb7406a8d1c8f9806f6b3763e823a59d1. - Consensus Transaction Processing Performance and Error Handling: Reuses the sighasher for transaction validation efficiency; improved error handling for network upgrade checks; aligns I/O error types to streamline consensus layer processing. Commit: fb8e6726a94de33f080819107bcaf0c3822c1e60. - Documentation and Code Quality Improvements: Documentation formatting fixes and clippy-friendly formatting; test vector iterations to improve reliability. Commits: 1e3f40bbc0997439ddc0c112e396ae9fd1790217; dd5f43c0faadfce8cf20f9d84dc9bc3f83a1628b. Overall impact and accomplishments: - Strengthened RPC surface with richer data and robust serialization/deserialization, enabling richer client tooling and dashboards. - Improved block data visibility through value pool reporting, aiding economic analysis and chain health monitoring. - Enhanced performance and reliability in the consensus path, reducing CPU overhead and improving error handling and operability under upgrades. - Reduced maintenance cost via API simplification and better code quality, with clearer documentation and linting compliance. Technologies and skills demonstrated: - Rust engineering: API design, deserialization/serialization, error handling, refactoring for performance. - RPC layer enhancements, testing strategy, and test vectors. - Performance optimization in consensus validation paths (sighasher reuse). - Code quality improvements and documentation discipline (clippy, docs).
8 Commits • 6 Features
Jun 1, 2025Month: 2025-06 — Zebra (ZcashFoundation/zebra) performance-focused update highlighting RPC improvements, value-pool visibility, and consensus optimizations. Business value achieved includes richer client data, more reliable RPC results, improved block validation efficiency, and cleaner API surfaces for maintainers and downstream integrations. Key features delivered: - RPC Deserialization Enhancements and Tests: RPC layer now deserializes NoteCommitmentSubtreeData, GetSubtrees, Treestate, and Commitments; error handling in get_block_template refactored; JsonParameters/Response handling tightened; extensive serialization/deserialization tests added. Commit: f748d3781cb68d5a1d6b49e9eb42506467668125. - Getrawtransaction RPC Improvements: Added fields (txid, overwintered, version, version_group_id, lock_time, expiry_height, block_hash, block_time); optional block_hash support; improved hex deserialization; txid reuse in TransactionObject for efficiency. Commits: 7c4d8f09bcc8e6d9170edf2b1e9456adacb933b0; a20692e5545cd7d6d7f575b8e3d2f0d4169f611c. - Getblock RPC Enhancement with Value Pool: getblock now includes value pool information; introduces BlockInfo struct to store block details and computes chain supply and value pool balances including deltas. Commit: 9caa717d9547985c8ff47784ee77ff27758d6740. - RPC API Cleanup and API Surface Flattening: RPC API refactor to clean types, remove unnecessary responses, and re-export types to flatten the API; documentation updates and clippy warnings addressed. Commit: 63523aabb7406a8d1c8f9806f6b3763e823a59d1. - Consensus Transaction Processing Performance and Error Handling: Reuses the sighasher for transaction validation efficiency; improved error handling for network upgrade checks; aligns I/O error types to streamline consensus layer processing. Commit: fb8e6726a94de33f080819107bcaf0c3822c1e60. - Documentation and Code Quality Improvements: Documentation formatting fixes and clippy-friendly formatting; test vector iterations to improve reliability. Commits: 1e3f40bbc0997439ddc0c112e396ae9fd1790217; dd5f43c0faadfce8cf20f9d84dc9bc3f83a1628b. Overall impact and accomplishments: - Strengthened RPC surface with richer data and robust serialization/deserialization, enabling richer client tooling and dashboards. - Improved block data visibility through value pool reporting, aiding economic analysis and chain health monitoring. - Enhanced performance and reliability in the consensus path, reducing CPU overhead and improving error handling and operability under upgrades. - Reduced maintenance cost via API simplification and better code quality, with clearer documentation and linting compliance. Technologies and skills demonstrated: - Rust engineering: API design, deserialization/serialization, error handling, refactoring for performance. - RPC layer enhancements, testing strategy, and test vectors. - Performance optimization in consensus validation paths (sighasher reuse). - Code quality improvements and documentation discipline (clippy, docs).
June 2025
May 2025
1 Commits • 1 Features
May 1, 2025May 2025 (Zebra repo) - Delivered a stability-focused update to dependency management by constraining Dependabot to update only Cargo.lock. This ensures lockfile-driven reproducibility, reduces CI churn from unintended Cargo.toml changes, and preserves security and feature updates under explicit review. The change promotes deterministic builds, smoother releases, and improved developer experience by minimizing dependency drift and ambiguity.
May 2025
1 Commits • 1 Features
May 1, 2025May 2025 (Zebra repo) - Delivered a stability-focused update to dependency management by constraining Dependabot to update only Cargo.lock. This ensures lockfile-driven reproducibility, reduces CI churn from unintended Cargo.toml changes, and preserves security and feature updates under explicit review. The change promotes deterministic builds, smoother releases, and improved developer experience by minimizing dependency drift and ambiguity.
March 2025
1 Commits • 1 Features
Mar 1, 2025March 2025 (2025-03) – Zebra (ZcashFoundation/zebra). Key delivery focused on RPC observability and block data retrieval: implemented Block Size Reporting Enhancement for getblock RPC so that verbosity=2 responses include the serialized block size, and added a BlockAndSize state service type to support efficient retrieval of both block data and its size. These changes reduce client-side round-trips, improve analytics and block explorer workflows, and enhance observability with minimal API surface changes. No major bugs fixed this month; work centered on feature delivery and code quality improvements. Technologies demonstrated include Rust-based RPC tooling, state service design, and serialization handling, aligning with performance and reliability goals.
1 Commits • 1 Features
Mar 1, 2025March 2025 (2025-03) – Zebra (ZcashFoundation/zebra). Key delivery focused on RPC observability and block data retrieval: implemented Block Size Reporting Enhancement for getblock RPC so that verbosity=2 responses include the serialized block size, and added a BlockAndSize state service type to support efficient retrieval of both block data and its size. These changes reduce client-side round-trips, improve analytics and block explorer workflows, and enhance observability with minimal API surface changes. No major bugs fixed this month; work centered on feature delivery and code quality improvements. Technologies demonstrated include Rust-based RPC tooling, state service design, and serialization handling, aligning with performance and reliability goals.
March 2025
February 2025
1 Commits • 1 Features
Feb 1, 2025February 2025 (Zebra) summary: Delivered a major feature to enhance mempool observability by implementing verbose getrawmempool RPC output with detailed transaction data and new time/height fields. This included updating the RPC signature, introducing types for verbose output, and adjusting the mempool storage to accommodate the new fields. Result: richer diagnostics, improved tooling compatibility, and better operational visibility. No major bugs fixed this month. Overall impact: improved developer productivity, faster issue diagnosis, and stronger monitoring/analytics capabilities. Technologies demonstrated: API design and versioning, Rust-based data model changes, and robust code changes aligning with repository standards.
February 2025
1 Commits • 1 Features
Feb 1, 2025February 2025 (Zebra) summary: Delivered a major feature to enhance mempool observability by implementing verbose getrawmempool RPC output with detailed transaction data and new time/height fields. This included updating the RPC signature, introducing types for verbose output, and adjusting the mempool storage to accommodate the new fields. Result: richer diagnostics, improved tooling compatibility, and better operational visibility. No major bugs fixed this month. Overall impact: improved developer productivity, faster issue diagnosis, and stronger monitoring/analytics capabilities. Technologies demonstrated: API design and versioning, Rust-based data model changes, and robust code changes aligning with repository standards.
December 2024
3 Commits • 2 Features
Dec 1, 2024December 2024 monthly summary for ZcashFoundation/zebra. Delivered key RPC and diagnostics improvements with direct business impact: enhanced API parity for Getblock RPC, richer error reporting across core components, and updated tests/serialization for consistent behavior.
3 Commits • 2 Features
Dec 1, 2024December 2024 monthly summary for ZcashFoundation/zebra. Delivered key RPC and diagnostics improvements with direct business impact: enhanced API parity for Getblock RPC, richer error reporting across core components, and updated tests/serialization for consistent behavior.
December 2024
November 2024
1 Commits
Nov 1, 2024November 2024 — Zebra release stabilization and upgrade guidance focused on 2.0.x. Delivered targeted release notes and user guidance to reduce activation risk (NU6) and ensure a smooth upgrade path, including explicit authentication changes for JSON RPC endpoints.
November 2024
1 Commits
Nov 1, 2024November 2024 — Zebra release stabilization and upgrade guidance focused on 2.0.x. Delivered targeted release notes and user guidance to reduce activation risk (NU6) and ensure a smooth upgrade path, including explicit authentication changes for JSON RPC endpoints.
Activity
Loading activity data...
Quality Metrics
Correctness91.8%
Maintainability87.8%
Architecture86.4%
Performance83.2%
AI Usage21.2%
Skills & Technologies
Programming Languages
JSONMarkdownPythonRustShellTOMLYAMLplaintext
Technical Skills
API DesignAPI DevelopmentBackend DevelopmentBlockchainBlockchain DevelopmentBug FixingBuild SystemsCI/CDChangelog ManagementCode OptimizationCode RefactoringCode RemovalConfiguration ManagementConsensusContinuous Integration
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline