midnightntwrk/midnight-indexer
Jun 2025 – Apr 2026
11 Months active
Languages Used
GraphQLJavaScriptMarkdownRustSQLShellTypeScriptgraphql
Technical Skills
API DesignAPI DevelopmentBackend DevelopmentBlockchainBlockchain IndexingBuild Scripting
Sean Kwak
PROFILE
Sean Kwak
Sean Kwak engineered core blockchain analytics and indexing features for the midnightntwrk/midnight-indexer repository, focusing on data integrity, governance, and operational reliability. He designed and extended GraphQL APIs for real-time UTXO, fee, and governance parameter tracking, integrating Rust and TypeScript for backend and API development. Sean implemented robust CI/CD pipelines, security scanning, and automated testing to ensure stable deployments and maintainable code. His work included optimizing database interactions, introducing protocol-aware dust tracking, and enhancing subscription services for shielded and unshielded transactions. These efforts resulted in a scalable, reliable platform supporting advanced blockchain analytics and streamlined developer and client integration workflows.
Overall Statistics
Feature vs Bugs
62%Features
Repository Contributions
138Total
Bugs
23
Commits
138
Features
37
Lines of code
30,770
Activity Months11
Your Network
105 peopleSame Organization
@iohk.io95
Work History
April 2026
12 Commits • 5 Features
Apr 1, 2026April 2026 highlights for midnight-indexer: Delivered five major features across the repository, improved data accuracy and API consistency, and enhanced performance and observability. The month also included targeted bug fixes to stabilize dust-related queries and merkle-tree related updates.
12 Commits • 5 Features
Apr 1, 2026April 2026 highlights for midnight-indexer: Delivered five major features across the repository, improved data accuracy and API consistency, and enhanced performance and observability. The month also included targeted bug fixes to stabilize dust-related queries and merkle-tree related updates.
April 2026
March 2026
25 Commits • 6 Features
Mar 1, 2026March 2026 highlights: 4.0.0 RC readiness achieved through CI cleanup and RC prep across multiple commits, plus consolidation of references and environment hygiene. Ledger DB/state deserialization enhancements delivered faster, safer data processing with lazy loading, scalar subquery refactor for ledger events, batch inserts to reduce SQL round-trips, and a clarifying DB column rename. Dependency bumps aligned across ledger, node, zswap, onchain-runtime, and storage-core to final or RC milestones. Release process updates preparation for 4.0.0-rc.9 and 4.0.0-rc.10. Observability and correctness improvements include logging wallet ID on connect/disconnect mutations, adding start_period to postgres healthcheck, and fixes to batch_update ordering (flushing pending inserts before delete/root-count) and timestamp unit handling.
March 2026
25 Commits • 6 Features
Mar 1, 2026March 2026 highlights: 4.0.0 RC readiness achieved through CI cleanup and RC prep across multiple commits, plus consolidation of references and environment hygiene. Ledger DB/state deserialization enhancements delivered faster, safer data processing with lazy loading, scalar subquery refactor for ledger events, batch inserts to reduce SQL round-trips, and a clarifying DB column rename. Dependency bumps aligned across ledger, node, zswap, onchain-runtime, and storage-core to final or RC milestones. Release process updates preparation for 4.0.0-rc.9 and 4.0.0-rc.10. Observability and correctness improvements include logging wallet ID on connect/disconnect mutations, adding start_period to postgres healthcheck, and fixes to batch_update ordering (flushing pending inserts before delete/root-count) and timestamp unit handling.
February 2026
22 Commits • 10 Features
Feb 1, 2026February 2026 (2026-02) performance summary for midnight-indexer. Delivered foundational genesis initialization features, extended the API surface, integrated the SPO indexer, and improved reliability and CI readiness. Key outcomes include accurate genesis state initialization from both pallet storage and chain spec, enabling faster and safer node bootstraps; SPO indexer integrated to extend data coverage and analytics; Indexer API enhanced with protocolVersion field and ledger parameter exposure in block queries, improving downstream analytics and interoperability; security and client reliability improvements via a User-Agent header on the Subxt RPC client and token-based session handling; and release-readiness through 3.1.0-alpha preparation and CI workflow hardening. These changes collectively reduce onboarding time, improve data fidelity, and support scalable deployments across environments.
22 Commits • 10 Features
Feb 1, 2026February 2026 (2026-02) performance summary for midnight-indexer. Delivered foundational genesis initialization features, extended the API surface, integrated the SPO indexer, and improved reliability and CI readiness. Key outcomes include accurate genesis state initialization from both pallet storage and chain spec, enabling faster and safer node bootstraps; SPO indexer integrated to extend data coverage and analytics; Indexer API enhanced with protocolVersion field and ledger parameter exposure in block queries, improving downstream analytics and interoperability; security and client reliability improvements via a User-Agent header on the Subxt RPC client and token-based session handling; and release-readiness through 3.1.0-alpha preparation and CI workflow hardening. These changes collectively reduce onboarding time, improve data fidelity, and support scalable deployments across environments.
February 2026
January 2026
6 Commits • 1 Features
Jan 1, 2026Monthly summary for 2026-01 (midnight-indexer repository). Focused on delivering governance-focused capabilities, data integrity, and reliability improvements that drive governance visibility, correct state, and operational stability in production.
January 2026
6 Commits • 1 Features
Jan 1, 2026Monthly summary for 2026-01 (midnight-indexer repository). Focused on delivering governance-focused capabilities, data integrity, and reliability improvements that drive governance visibility, correct state, and operational stability in production.
December 2025
8 Commits • 3 Features
Dec 1, 2025December 2025 monthly summary for midnight-indexer: focused on delivering core features, stabilizing the indexer pipeline, and tightening security and deployment readiness. Achievements span feature enhancements, reliability improvements, and governance-ready releases, with clear business value in reliability, traceability, and scalability.
8 Commits • 3 Features
Dec 1, 2025December 2025 monthly summary for midnight-indexer: focused on delivering core features, stabilizing the indexer pipeline, and tightening security and deployment readiness. Achievements span feature enhancements, reliability improvements, and governance-ready releases, with clear business value in reliability, traceability, and scalability.
December 2025
November 2025
12 Commits • 2 Features
Nov 1, 2025November 2025 (midnight-indexer): Delivered core enabling work for the 3.x release cycle, implemented comprehensive Dust Generation API/data model enhancements, and added startup validation to improve reliability. Achieved security and quality gains through CI/action upgrades and refreshed dependencies, complemented by updated documentation and changelogs. These efforts boosted release velocity, API reliability, and operational safety.
November 2025
12 Commits • 2 Features
Nov 1, 2025November 2025 (midnight-indexer): Delivered core enabling work for the 3.x release cycle, implemented comprehensive Dust Generation API/data model enhancements, and added startup validation to improve reliability. Achieved security and quality gains through CI/action upgrades and refreshed dependencies, complemented by updated documentation and changelogs. These efforts boosted release velocity, API reliability, and operational safety.
October 2025
19 Commits • 2 Features
Oct 1, 2025October 2025 (2025-10) highlights from midnight-indexer:
19 Commits • 2 Features
Oct 1, 2025October 2025 (2025-10) highlights from midnight-indexer:
October 2025
September 2025
12 Commits • 3 Features
Sep 1, 2025September 2025: Delivered core data-plane enhancements in midnight-indexer, strengthening node economics, data correctness, and CI/CD reliability. Key changes include enabling Midnight-node fee structure, exposing ledger parameters via GraphQL, and upgrading CI workflows with security scanning and dependency maintenance. Fixed critical bugs affecting genesis UTXO aggregation and chain-indexer correctness, including system transaction capture. These efforts improved data integrity, governance transparency, and overall platform resilience.
September 2025
12 Commits • 3 Features
Sep 1, 2025September 2025: Delivered core data-plane enhancements in midnight-indexer, strengthening node economics, data correctness, and CI/CD reliability. Key changes include enabling Midnight-node fee structure, exposing ledger parameters via GraphQL, and upgrading CI workflows with security scanning and dependency maintenance. Fixed critical bugs affecting genesis UTXO aggregation and chain-indexer correctness, including system transaction capture. These efforts improved data integrity, governance transparency, and overall platform resilience.
August 2025
6 Commits • 2 Features
Aug 1, 2025August 2025 (2025-08) monthly summary for midnight-indexer focused on reliability, compatibility, testing, and security workflow improvements. Delivered stability fixes, metadata alignment for node compatibility, comprehensive upgrade guidance, improved test reliability, and security workflow modernization. These efforts reduce production risk, accelerate upgrades, and improve developer efficiency.
6 Commits • 2 Features
Aug 1, 2025August 2025 (2025-08) monthly summary for midnight-indexer focused on reliability, compatibility, testing, and security workflow improvements. Delivered stability fixes, metadata alignment for node compatibility, comprehensive upgrade guidance, improved test reliability, and security workflow modernization. These efforts reduce production risk, accelerate upgrades, and improve developer efficiency.
August 2025
July 2025
2 Commits • 1 Features
Jul 1, 2025Concise monthly summary for 2025-07 focusing on API reliability and developer experience enhancements for midnight-indexer. Achieved a critical error-handling bug fix and refreshed GraphQL API documentation to align with the current schema. These changes improve integration reliability, reduce support overhead, and strengthen API usability for clients.
July 2025
2 Commits • 1 Features
Jul 1, 2025Concise monthly summary for 2025-07 focusing on API reliability and developer experience enhancements for midnight-indexer. Achieved a critical error-handling bug fix and refreshed GraphQL API documentation to align with the current schema. These changes improve integration reliability, reduce support overhead, and strengthen API usability for clients.
June 2025
14 Commits • 2 Features
Jun 1, 2025June 2025: Delivered major platform enhancements in midnight-indexer, focusing on unshielded UTXO tracking, GraphQL API improvements, and fee analytics with robust subscriptions. Achievements delivered across the repo included storage trait refinements, runtime-agnostic UTXO data handling, genesis UTXO extraction workaround, and improved error handling and ordering for API stability. These changes increase data visibility, reliability, and monetization insights for blockchain analytics downstream customers.
14 Commits • 2 Features
Jun 1, 2025June 2025: Delivered major platform enhancements in midnight-indexer, focusing on unshielded UTXO tracking, GraphQL API improvements, and fee analytics with robust subscriptions. Achievements delivered across the repo included storage trait refinements, runtime-agnostic UTXO data handling, genesis UTXO extraction workaround, and improved error handling and ordering for API stability. These changes increase data visibility, reliability, and monetization insights for blockchain analytics downstream customers.
June 2025
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Quality Metrics
Correctness94.8%
Maintainability90.0%
Architecture89.8%
Performance87.8%
AI Usage23.0%
Skills & Technologies
Programming Languages
BashBinaryDockerfileGraphQLJavaScriptMarkdownPythonRustSQLScala
Technical Skills
API DesignAPI DevelopmentAPI DocumentationAPI IntegrationAPI developmentAPI documentationBackend DevelopmentBlockchainBlockchain IndexingBuild AutomationBuild ManagementBuild ScriptingCI/CDCLI DevelopmentChain Indexing
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