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Emil Veldhuizen

PROFILE

Emil Veldhuizen

Over four months, contributed to blockchain analytics and NFT infrastructure across DefiLlama-Adapters, DefiLlama/dimension-adapters, vechain/app-hub, and vechain-kit. Developed adapters in JavaScript and TypeScript to integrate BetterSwap’s TVL and daily trading volume data for VeChain, normalizing API responses and ensuring data integrity. Launched The Shts NFT collection with token integration in vechain/app-hub, establishing a scalable pattern for NFT-enabled engagement. Enhanced vechain-kit by improving transaction reliability for Privy social-login, refining smart account versioning, and strengthening ERC20 token handling. Focused on robust API integration, front end development with React, and smart contract development to deliver reliable, extensible blockchain solutions.

Overall Statistics

Feature vs Bugs

86%Features

Repository Contributions

9Total
Bugs
1
Commits
9
Features
6
Lines of code
84,610
Activity Months4

Work History

March 2026

6 Commits • 3 Features

Mar 1, 2026

March 2026 – vechain-kit: Key deliveries across reliability, UI flexibility, and data quality Key outcomes: - Robust Privy/social-login transaction handling: gas padding restored to avoid reverts, improving transaction success for delegated Privy flows. - Smart account version accuracy: prioritized actual account version in getAccountVersion(), preventing upcasts that caused reverts on upgraded accounts. - UI customization: added ability to hide account modal quick actions, enabling personalized UX without breaking existing configurations. - Balance and query reliability: formatted custom token balances with correct decimals, added defensive validation to prevent NaN, and unified balance query keys to streamline refresh across token types. - ERC20 transfer resilience: added support for token-specific decimals, surfaced token metadata lookup failures, and validated resolved decimals to prevent render crashes. These changes collectively reduce user friction, increase transaction reliability, and provide a stronger foundation for future features.

February 2026

1 Commits • 1 Features

Feb 1, 2026

February 2026: Delivered The Shts NFT collection with token integration in vechain/app-hub, establishing a scalable NFT offering and token-enabled engagement. The work accelerates time-to-value for NFT launches and strengthens the product’s competitive position.

July 2025

1 Commits • 1 Features

Jul 1, 2025

July 2025 monthly summary: Delivered a new VeChain Daily Trading Volume Adapter in DefiLlama/dimension-adapters to track BetterSwap's daily trading volume on the VeChain blockchain. Implemented the API response interface and fetch function, configured with the factory address and start date to enable reliable data collection and insights. This work extends cross-chain data coverage and supports more comprehensive VeChain analytics.

April 2025

1 Commits • 1 Features

Apr 1, 2025

April 2025 monthly summary for DefiLlama-Adapters: Delivered a new BetterSwap TVL adapter for Vechain, enabling TVL data retrieval via the BetterSwap API and normalization to USDT balances. Time travel functionality is disabled to ensure data integrity and avoid speculative data.

Activity

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Quality Metrics

Correctness97.8%
Maintainability86.6%
Architecture86.6%
Performance86.6%
AI Usage26.6%

Skills & Technologies

Programming Languages

JSONJavaScriptTypeScript

Technical Skills

API IntegrationAPI integrationBlockchain IntegrationData EngineeringDeFiFull stack developmentJavaScriptNFT DevelopmentReactSmart ContractsTypeScriptWeb Developmentblockchain developmentfront end developmentfull stack development

Repositories Contributed To

4 repos

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

vechain/vechain-kit

Mar 2026 Mar 2026
1 Month active

Languages Used

JavaScriptTypeScript

Technical Skills

API integrationJavaScriptReactTypeScriptblockchain developmentfront end development

DefiLlama/DefiLlama-Adapters

Apr 2025 Apr 2025
1 Month active

Languages Used

JavaScript

Technical Skills

API IntegrationDeFiSmart Contracts

DefiLlama/dimension-adapters

Jul 2025 Jul 2025
1 Month active

Languages Used

TypeScript

Technical Skills

API IntegrationData EngineeringFull stack development

vechain/app-hub

Feb 2026 Feb 2026
1 Month active

Languages Used

JSON

Technical Skills

Blockchain IntegrationNFT DevelopmentWeb Development