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Blaž Hrastnik

PROFILE

Blaž Hrastnik

Blaz contributed to the smartcontractkit/chainlink, chainlink-ton, and related repositories by engineering robust cross-chain messaging and smart contract infrastructure, with a focus on TON, Solana, and EVM interoperability. He built and integrated CCIP core components, including routers, onramps, and fee modules, enabling secure token transfers and fee modeling across multiple blockchains. Using Go, TypeScript, and Solidity, Blaz refactored deployment flows, standardized data structures, and improved test reliability, addressing edge cases in state management and contract versioning. His work emphasized maintainable code, modular configuration, and reliable CI, resulting in scalable, production-ready cross-chain protocols that reduced operational risk and accelerated integration.

Overall Statistics

Feature vs Bugs

55%Features

Repository Contributions

358Total
Bugs
92
Commits
358
Features
112
Lines of code
56,212
Activity Months11

Work History

October 2025

5 Commits • 4 Features

Oct 1, 2025

October 2025 monthly summary focused on delivering persistent cross-chain messaging improvements and TON-specific fee modeling across two main repositories (smartcontractkit/chainlink-ton and smartcontractkit/chainlink-ccip). Key features delivered include the GetChainFeeComponents function for the TON accessor, TON gas fee calculation support with USD conversion, and OCR3 CCIP configuration for robust cross-chain messaging. Major bug fixes include the MerkleRoot_Validate opcode adjustment with contract version bumps to align MerkleRoot and OffRamp. Refactoring efforts introduced stronger typing (SnakedCell) and standardized data handling to improve maintainability and reduce future regressions. These efforts collectively enhance cross-chain reliability, cost transparency, and developer productivity, with business value in accurate fee modeling, secure messaging, and streamlined changes across TON and CCIP components.

September 2025

46 Commits • 17 Features

Sep 1, 2025

September 2025 was focused on enabling robust cross-chain TON CCIP support, modernizing dependencies, and hardening test/build reliability across the Chainlink suite. Key capabilities delivered include TON as a CCIP destination, updated core dependencies (contracts, chainlink-common, offramp, TON bindings), and upgrades to the deployments framework to support TON wallet v5. TON-specific configurations (OCR3 setup, a consistent message hasher, and ENV-driven TON contract versioning) were implemented to ensure predictable TON behavior in production. Major bugs addressed included correct TON address encoding on the homechain, stabilization of EVM2TON tests, fixes to TON report hashing, transmitter creation and funding flows, and several build-time issues (compilation fixes, lint cleanups, and maintenance tasks). Test infrastructure improvements (increased TON supply for testing, funding workflow refinements, and test imports refactor) reduced flakiness and accelerated iteration. Impact: The changes significantly improve cross-chain interoperability (TON CCIP support), deployment readiness, and test stability, enabling faster, safer delivery of TON-enabled features and ecosystem integrations. Technologies and practices demonstrated include cross-repo refactoring, modular chain configuration, Tolk v1.1 upgrade, wallet v5 integration, robust test infrastructure, and comprehensive maintainability improvements.

August 2025

6 Commits • 3 Features

Aug 1, 2025

Month: 2025-08 — Concise monthly summary focusing on key accomplishments, major bugs fixed, overall impact and acquisitions, and technologies demonstrated. Key achievements and deliverables: - Enabled TON blockchain support in CCIP messaging for smartcontractkit/chainlink, including fee token handling and TON state management, expanding cross-chain messaging capabilities. - Refactored the SendRequest client types to break import cycles and updated dependencies to ensure go.work compatibility, improving maintainability and build reliability. - Fixed a missing FeeQuoter address case in loadChainState, enhancing state management and reducing edge-case failures. - Expanded CCIP TON integration in smartcontractkit/chainlink-ton with contract bindings, deployment configurations, lane management operations, and CI/test adjustments, enabling cross-chain communication between TON and EVM chains. Overall impact and business value: - Broader cross-chain connectivity and increased reliability for TON-enabled workflows, enabling customers to reach TON ecosystems via CCIP. - Improved developer experience and code health through architectural refactors and dependency hygiene, reducing future churn and build issues. - Strengthened risk management by addressing a state-handling gap and ensuring consistent address-type handling across chain states. Technologies/skills demonstrated: - Go tooling and module management (go.work, go.mod) and dependency upgrades. - Cross-chain protocol engineering, contract bindings, and lane management. - CI/test configuration adjustments and deployment configuration.

July 2025

50 Commits • 19 Features

Jul 1, 2025

In July 2025, the team delivered substantial improvements across the Chainlink TON and core Chainlink codebases, focusing on end‑to‑end onramp delivery, secure cross‑chain messaging, type system hardening, and deployment/test reliability. The work prioritizes business value: smoother onboarding flows for users, more reliable cross‑chain operations, and maintainable code with upgradable dependencies and consistent formatting.

June 2025

17 Commits • 3 Features

Jun 1, 2025

June 2025 performance highlights focused on delivering a production-ready TON CCIP baseline and strengthening build stability. Key work centered on establishing CCIP Core Foundation on TON (Router, OnRamp, OffRamp, FeeQuoter, MerkleRoot) with library refactors and Deployable pattern alignment, plus comprehensive test scaffolding to validate interop and deployment flows. Fee Quoter enhancements introduced advanced fee calculations, chain-family selectors, and new data-structures wrappers, alongside targeted testing for reliability. Tooling, dependencies, and build improvements reduced friction and improved consistency across the repository. These efforts establish a solid foundation for TON CCIP deployment, improve deployment reliability, and enable faster iteration and future integrations.

April 2025

18 Commits • 7 Features

Apr 1, 2025

April 2025 performance snapshot: Across Chainlink Solana, CCIP, and EVM, delivered stability, parsing robustness, and cross-chain interoperability improvements that directly drive reliability and business value. Key features and fixes included a revamped Log Poller with broader primitive-type support and remap initialization fixes; two's complement encoding and optional chain ID verification for EVM-aligned behavior; robust Solana CPI event parsing and nested CCIP handling; CI/test reliability improvements via Nix-based setup; enhanced observability with string-based parsing and ATA context fixes; and expanded cross-chain testing for Solana–EVM CCIP flows. These changes reduce debugging time, increase message integrity across chains, and scale the compute-unit and logging capabilities for complex workflows.

March 2025

77 Commits • 24 Features

Mar 1, 2025

March 2025 performance summary for smartcontract kit development across Chainlink, Chainlink-CCIP, and Chainlink-Solana. Delivered substantive cross-chain features, upstream compatibility alignment, stability improvements, and build hygiene enhancements. Business value highlights include enabling reliable cross-chain token transfers, Solana/EVM interoperability, and more robust CI/build processes.

February 2025

115 Commits • 21 Features

Feb 1, 2025

February 2025 performance summary: Delivered targeted features and stability fixes across Chainlink core, CCIP, and Solana integrations. The focus was on configurability, reliability, and developer experience to unlock business value and expedite future integration work. Highlights include SVM extra args integration, LatestBlock helper, nil-startBlock guards, EVM-only replay logic, and CCIP readiness for relayers, complemented by robustness improvements and test hygiene.

January 2025

9 Commits • 5 Features

Jan 1, 2025

January 2025 monthly summary: Delivered multi-chain coverage and platform reliability improvements across four repositories, enabling Solana deployment, OCR3 key management, and TRON key support, while standardizing port bindings and stabilizing test configurations. These changes extend cross-chain capabilities, improve deployment reliability, and reduce maintenance overhead, accelerating time-to-market for multi-chain scenarios. Technologies demonstrated include Solana integration, OCR3 key management, non-EVM testing improvements, and updated key schemas for TRON and Solana.

December 2024

11 Commits • 8 Features

Dec 1, 2024

December 2024 highlights cross-ecosystem improvements across chainlink-evm and operator-ui, delivering business value through cross-chain capabilities, better node identification, improved data/navigation across networks, and tooling alignment for security and maintainability. Key features and capabilities delivered: - NopView PeerID enhancement: Added PeerID field to NopView for improved node identification and diagnostics; shell.nix Go version updated to maintain compatibility with latest features. (commit 26734bab6f69266281867cb0f6e04aa343dcef67) - End-to-end on-chain signing strategy: Added onchainSigningStrategy to job specs and generalized the chains/nodes API/CLI to reduce boilerplate and accelerate multi-chain onboarding. (commit 9bf038898d0a86cb220cf6a297d50501146305ee) - UI and data navigation improvements for multi-network ecosystems: Implemented network-scoped data routing and navigation fixes for non-EVM networks, improving accuracy of data retrieval and user navigation. (commits 3d5399c531e4b9df5367801010ea7353999d26a6 and 5f24f1a3fd651eb06f2b022ca5692f6d2c02f43d) - Non-EVM Keys UI: Introduced NonEVMKeys component to render Solana, Aptos, and Starknet keys with refactored GraphQL queries to support these networks. (commit f2884f455a6273b922da192d34d7cb0e1d7858aa) - Node.js tooling alignment: Upgraded Node.js version to 20.13.1 to align tooling with core project standards, improving compatibility and security. (commit a6bc60df4bbe88e240b229cb507133c6d58ebe04)

November 2024

4 Commits • 1 Features

Nov 1, 2024

Month: 2024-11 — Focused on expanding cross-chain OCR capabilities and hardening deployment and node-management workflows in smartcontractkit/chainlink-evm. Key feature delivered: Multi-Chain OCR Node Management with Job Distributor Integration, enabling support for multiple chain types (EVM and non-EVM) with improved node labeling, idempotent deployments, and robust registration. This work also refactors node configuration to NodeInfo and upgrades underlying infrastructure to PostgreSQL and keystone, improving reliability and scalability. The combined effect reduces operational risk, accelerates deployment of OCR nodes, and enables future cross-chain capability extensions.

Activity

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Quality Metrics

Correctness89.2%
Maintainability85.8%
Architecture85.0%
Performance83.6%
AI Usage61.0%

Skills & Technologies

Programming Languages

GoGraphQLHTMLJavaScriptMakefileMarkdownNixRustShellSolidity

Technical Skills

API DevelopmentAPI IntegrationAPI developmentAPI integrationBackend DevelopmentBlockchainBlockchain ArchitectureBlockchain DevelopmentBlockchain IntegrationBlockchain TestingBug FixBuild ProcessBuild System ManagementBuild SystemsCCIP

Repositories Contributed To

8 repos

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

smartcontractkit/chainlink

Jan 2025 Sep 2025
7 Months active

Languages Used

GoTOMLHTMLJavaScriptMarkdownSolidity

Technical Skills

GoGo programmingSoliditybackend developmentblockchain developmenttesting

smartcontractkit/chainlink-ton

Jun 2025 Oct 2025
5 Months active

Languages Used

NixTolkTypeScriptjavascriptsoliditytypescriptGoJavaScript

Technical Skills

BlockchainBlockchain ArchitectureBlockchain DevelopmentBlockchain TestingBuild SystemsCCIP

smartcontractkit/chainlink-ccip

Feb 2025 Oct 2025
4 Months active

Languages Used

GoMakefileRustTypeScript

Technical Skills

API IntegrationBackend DevelopmentBlockchain DevelopmentCross-Chain CommunicationData DecodingDebugging

smartcontractkit/chainlink-solana

Feb 2025 Apr 2025
3 Months active

Languages Used

GoYAML

Technical Skills

Backend DevelopmentBlockchain DevelopmentBlockchain IntegrationChainlinkCodec ImplementationConfiguration Management

smartcontractkit/operator-ui

Dec 2024 Sep 2025
3 Months active

Languages Used

GraphQLJavaScriptMarkdownShellTypeScript

Technical Skills

API IntegrationComponent DesignDevOpsDocumentationEnvironment ManagementForm Handling

smartcontractkit/chainlink-evm

Nov 2024 Apr 2025
4 Months active

Languages Used

GoNix

Technical Skills

API developmentBlockchain DevelopmentDistributed SystemsGoGolangSmart Contracts

smartcontractkit/chainlink-testing-framework

Jan 2025 Jan 2025
1 Month active

Languages Used

Go

Technical Skills

Backend DevelopmentDevOpsTesting Frameworks

smartcontractkit/chainlink-deployments-framework

Sep 2025 Sep 2025
1 Month active

Languages Used

Go

Technical Skills

Blockchain DevelopmentGoSmart ContractsTesting Frameworks

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