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Matt Hauff

PROFILE

Matt Hauff

Over 15 months, Quexington engineered core wallet and API infrastructure for the Chia-Network/chia-blockchain repository, focusing on reliability, maintainability, and developer experience. He unified transaction signing and coin creation APIs, standardized wallet RPCs using Python decorators, and modularized signing logic to streamline integrations. His work included recursive CLVM deserialization, enum serialization, and robust test automation with WalletTestFramework, addressing edge cases in transaction processing and data integrity. By modernizing CI/CD pipelines, refactoring legacy code, and enhancing security in key management, Quexington delivered scalable backend solutions in Python and TypeScript that reduced integration risk and accelerated feature delivery across blockchain modules.

Overall Statistics

Feature vs Bugs

84%Features

Repository Contributions

135Total
Bugs
10
Commits
135
Features
52
Lines of code
65,607
Activity Months15

Work History

January 2026

6 Commits • 3 Features

Jan 1, 2026

January 2026 performance summary for Chia-Network/chia-blockchain: Delivered robust transaction processing and API stability enhancements that improve reliability, developer productivity, and integration readiness. Key features include a unified transaction signing path with CAT validation, deterministic serialization for ConditionValidTimes, and Wallet RPC stability/API refinements. These changes reduce transaction failures, ensure consistent data representation, and clarify RPC interfaces, enabling smoother wallet integrations and scalable deployments.

December 2025

13 Commits • 5 Features

Dec 1, 2025

December 2025 delivered significant wallet and core blockchain improvements focused on API consistency, modularity, and wallet performance. Key outcomes include standardizing wallet RPC handling via @marshal, modularizing signing logic, and optimizing asset management and key generation. These changes reduce maintenance cost, speed feature delivery, and improve reliability for NFT minting and wallet operations across the Chia network.

November 2025

21 Commits • 9 Features

Nov 1, 2025

November 2025 monthly summary for Chia-Network/chia-blockchain focusing on reliability, API consistency, and maintainability. The team delivered a set of wallet reliability improvements, API marshalling enhancements, and substantial test infrastructure modernization that collectively reduce user-facing issues, accelerate release readiness, and lower maintenance costs. Key outcomes include stabilization of wallet synchronization for RPC TX workflows, standardization of CHIA offer APIs via @marshal, and targeted refactors to improve error handling and resource management. In addition, the month emphasized test coverage and linting improvements, enabling faster feedback and higher code quality across the project.

October 2025

8 Commits • 3 Features

Oct 1, 2025

October 2025 monthly summary for Chia-Network/chia-blockchain focusing on platform and CI upgrades, marshaling improvements, key management security enhancements, and data cleanup bug fixes; highlights business value and technical achievements.

September 2025

5 Commits • 3 Features

Sep 1, 2025

Month: 2025-09 Concise monthly summary for Chia Network development: - Key features delivered: - CLVM deserialization improvements for complex nested structures: Refactored CLVM streamable type analysis to use fully recursive JSON logic for compound types, broadening support to type[object] and improving robustness in nested deserialization. Associated commit: 326b1084ce483cadcda7a8641f43e7e829dfb3cf. (CHIA-3729) - Unified RPC marshaling decorator adoption across wallet, notifications, and CAT endpoints: Migrated request/response handling to the @marshal decorator to standardize data validation across wallet coin RPCs, send_notifications, and easy CAT endpoints. Commits: 61034b5646c9b52205263e211d95af0250191c92; 9d71f283c3d68540fc6b8fc2d08e023ed2cfd348; b45f67765f5aab9f308261045e97bd6215fa7651. (CHIA-3602/3603/3604) - Add label support to add_key in wallet API: Added optional label field to AddKey structure and wired through add_key RPC to keychain proxy for improved key management. Commit: ab5528850cdc728a332f658a747d76a9aa75a2c8. (LABS-126) - Major bugs fixed: - [CHIA-3729] Fix clvm streamable type analysis: Resolved edge cases in deserialization of nested CLVM structures, reducing incorrect type analysis and related runtime errors. - Overall impact and accomplishments: - Enhanced system robustness and reliability in CLVM deserialization and RPC data handling, leading to fewer runtime errors in production and safer onboarding of advanced smart-contract patterns. - Improved developer experience with a unified RPC layer, enabling faster feature delivery and easier maintenance across wallet, notifications, and CAT components. - Better key management UX through label support in wallet key management, setting the stage for clearer auditing and key lifecycle workflows. - Technologies/skills demonstrated: - Advanced JSON-based type analysis with recursive design for CLVM deserialization. - Decorator-based RPC marshaling and data validation across multiple services. - API surface evolution with non-breaking field additions and cross-component propagation. Business value: - Increased reliability of core blockchain tooling, reduced risk of deserialization-related failures, and streamlined cross-component data handling, enabling faster delivery of features and safer production deployments.

August 2025

16 Commits • 4 Features

Aug 1, 2025

Monthly summary for 2025-08: Delivered major wallet RPC modernization, expanded RCAT and CAT wallet test coverage, enhanced enum serialization/deserialization, and Code Quality/Data Model cleanup. These changes improve API type safety, reliability across wallet variants, and maintainability, reducing runtime risk and enabling smoother feature delivery.

July 2025

8 Commits • 2 Features

Jul 1, 2025

2025-07 monthly highlights: Delivered RCAT support with a new RCATWallet and WalletTestFramework integration, enabling standardized testing of Revocable CATs (mint_cat) and a memo structure refactor. Modernized DID RPCs and overall RPC interface by applying @marshal decorator and removing legacy DID recovery endpoints, resulting in a cleaner, more maintainable API. Fixed memo handling by converting memo storage in TransactionRecord from a list of tuples to a dict, addressing data integrity and performance issues. Expanded test coverage by migrating CAT wallet tests to WalletTestFramework and incorporating RCAT scenarios into CI. Overall impact: stronger asset token capabilities, improved API consistency, and a more reliable, maintainable codebase that supports faster QA cycles and safer revocable assets. Technologies/skills demonstrated: Python, WalletTestFramework, RCATWallet, DID RPC modernization, @marshal decorator, API design, test automation.

June 2025

7 Commits • 3 Features

Jun 1, 2025

June 2025 summary for Chia-Network/chia-blockchain: Delivered critical correctness fixes, enhanced serialization, and improved RPC consistency, while strengthening code quality and test reliability. These efforts reduce risk, improve data integrity, and accelerate future feature work across wallet data handling, test alignment, serialization, and RPC surfaces.

April 2025

5 Commits • 3 Features

Apr 1, 2025

April 2025 monthly summary for Chia-Network/chia-blockchain focused on wallet security, standardization, and robust test coverage. Delivered three wallet-oriented initiatives that improve security posture and maintainability: standardization of puzzle hash generation via the WalletActionScope context manager, security hardening by removing direct secret key access in the pool wallet (with accompanying test fixes), and WalletTestFramework adoption for wallet and NFT tests, including migrations of data-layer offers/cancellations and NFT minting/trading scenarios to a unified framework. These changes reduce security risk, enhance code consistency, and increase test reliability, enabling safer, faster releases and more predictable wallet behavior across modules.

March 2025

1 Commits • 1 Features

Mar 1, 2025

March 2025: Delivered a refactor of Wallet Puzzle Hash handling in the Chia blockchain wallet to improve state accuracy and reliability, updated tests, and enhanced error handling and transactionality. This work reduces the risk of wallet puzzle hash mismanagement and improves end-user reliability across wallet operations.

February 2025

13 Commits • 3 Features

Feb 1, 2025

February 2025 highlights across chia-blockchain: Standardized the Wallet generate_signed_transaction API across wallet types with tightened input validation, improved fee handling and coin/amount workflows; integrated the standardization into WalletProtocol and aligned VCWallet with other wallets. Strengthened testing through WalletTestFramework migration and expanded NFT offer test coverage. Removed DAO-related functionality, tests, CLI commands, RPC endpoints, and wallet features to simplify and harden the codebase. Resulting impact includes improved reliability, maintainability, and faster developer velocity.

January 2025

9 Commits • 3 Features

Jan 1, 2025

January 2025 highlights for Chia-Network/chia-blockchain: API unification for coin creation and transaction generation across wallets, enhanced wallet data integrity, removal of zero-value/legacy edge cases, and strengthened testing/validation infrastructure. These changes reduce integration risk, prevent erroneous payments, and improve maintainability and test coverage for wallet flows.

December 2024

7 Commits • 4 Features

Dec 1, 2024

December 2024 monthly summary for Chia-Network/chia-blockchain focused on reliability, API cleanliness, and developer ergonomics. Key feature work delivered substantial enhancements to CLVM message handling, wallet interfaces, and system modernization, underpinned by improved tests and documentation. These efforts reduce risk, simplify maintenance, and accelerate future development while improving onboarding and external integration.

November 2024

10 Commits • 4 Features

Nov 1, 2024

November 2024: Delivered significant code quality and user-facing enhancements for Chia blockchain, emphasizing developer productivity and reliability. Key outcomes include a full migration to Ruff linting/formatting, a CLI enhancement to sort offers by relevance, wallet improvements for pool reward claim transparency, and enhanced wallet test coverage for puzzle hash reuse. Also completed targeted maintenance fixes to ensure CI/pre-commit stability and lint rules.

October 2024

6 Commits • 2 Features

Oct 1, 2024

October 2024 focused on improving code quality, API usability, and wallet stability for chia-blockchain. Key outcomes include standardizing linting/formatting with Ruff across the repository, making Ruff an optional dependency, and updating pre-commit, CI, and docs to reflect the new workflow. The PushTX API was enhanced to parse JSON spend bundles with corresponding test updates, and wallet reorg issues were mitigated by deferring duplicate peak handling to avoid redundant peak notifications. These changes reduce technical debt, boost CI reliability, and lay groundwork for easier maintainability and future enhancements.

Activity

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Quality Metrics

Correctness91.6%
Maintainability88.8%
Architecture87.2%
Performance81.8%
AI Usage21.8%

Skills & Technologies

Programming Languages

BashChialispCythonJinjaPowerShellPythonRustShellTOMLTypeScript

Technical Skills

API DesignAPI DevelopmentAPI developmentAsynchronous ProgrammingBackend DevelopmentBlockchainBlockchain DevelopmentBuild AutomationCAT WalletsCI/CDCI/CD ConfigurationCLI DevelopmentCLI ToolsCLVMChialisp

Repositories Contributed To

2 repos

Overview of all repositories you've contributed to across your timeline

Chia-Network/chia-blockchain

Oct 2024 Jan 2026
15 Months active

Languages Used

PythonTOMLYAMLCythonRustTypeScriptJinjaChialisp

Technical Skills

API DevelopmentBackend DevelopmentCI/CDCI/CD ConfigurationCode FormattingCode Linting

Chia-Network/chia_rs

Dec 2025 Dec 2025
1 Month active

Languages Used

Python

Technical Skills

Pythonobject-oriented programming

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