Rensley R. — Portfolio

Live: doble196.github.io

About

🛠️ building Access0x1 — open-source onchain payments

Builder based in NYC. I work across the full stack — from on-chain protocols to AI agents to multi-tenant SaaS — and care about shipping things that work end-to-end. The Vyper-pilled dev.

What I work on

• On-chain — smart-contract development and security review across EVM and a few non-EVM chains
• AI agents — agentic workflows, retrieval, and orchestration around modern LLMs
• Fullstack web — modern frontend stacks, typed APIs, AWS-native edge
• Data / forecasting — time-series modeling and algorithmic trading research

Comfortable across several languages and ecosystems; usually picking up another. Still learning every week.

Building

• Access0x1 — Open-source onchain payments + identity rail
• NFTeria — Onchain commerce built on Access0x1

Access0x1 — live onchain

Open-source, on-chain payments + commerce + identity layer. One shared, multi-tenant router — zero custody, USD-priced via Chainlink feeds read in-tx, exact fee-split — joined with one permissionless call. Source-verified on Base Sepolia, Ethereum + Optimism Sepolia, and Avalanche Fuji (Arc Testnet + Robinhood Chain deployed, verification pending); deployment and repo activity below refresh on each daily sync.

• Router (Arc Testnet): 0xA5982ea8842Eea97C6e313A5f75FD8CF72C69Aad (verification pending)
• Router (Base Sepolia): 0xec89c9eE…6E8E57
• Repo: Access0x1/Access0x1

ETHGlobal Hacker Pack

An on-chain credential — the EG-HACKER token held on Optimism (contract 0x32382a82d9faDc55f971f33DaEeE5841cfbADbE0, wallet 0x53c61cfb8128ad59244e8c1d26109252ace23d14, balance 1).

// ETHGlobal Hacker Pack — onchain holder check (Optimism)
const { ethers } = require('ethers'); // npm install ethers
const provider = new ethers.JsonRpcProvider('https://mainnet.optimism.io');

const pack   = '0x32382a82d9faDc55f971f33DaEeE5841cfbADbE0'; // ETHGlobal Hacker Pack (EG-HACKER)
const wallet = '0x53c61cfb8128ad59244e8c1d26109252ace23d14';
const abi    = ['function balanceOf(address owner) view returns (uint256)'];

const held = await new ethers.Contract(pack, abi, provider).balanceOf(wallet);
console.log(`${wallet} ${held > 0n ? 'is' : 'is not'} a pack holder`); // → is  (balance: 1)

Background

Cyfrin Updraft (2024) — Smart-contract security, auditing, DeFi protocol design, account abstraction, DAO governance, formal verification.

Columbia FinTech Executive Bootcamp (2022) — Six-month intensive on blockchain + financial applications, algorithmic trading, forecasting.

Contact

• Email: rensley@nfteria.cc
• X: @VyperPilledDev
• GitHub: @doble196
• Location: New York, NY