# EVVM Transactions & Functions for Beginners I Kevin Padilla

- Channel: [ETHGlobal](https://streameth.org/ethglobal)
- Date: 2025-11-09
- Duration: 12:57
- Topics: EVVM, EVBN, Kevin Padilla, Matalabs, virtual blockchain, Sepolia testnet, Ethereum, Arbitrum, smart contracts, nonce, asynchronous nonce, synchronous nonce, executor, replay protection, payment function, decentralized RPC, GitHub repos, staking, name service, transaction validation, beginner tutorial, Web3 development
- Watch: https://streameth.org/watch/yt-iXMFeHS1Nn0
- YouTube: https://www.youtube.com/watch?v=iXMFeHS1Nn0

## Description

Kevin Padilla, CTO of EVBN and founder of Matalabs, introduces the fundamentals of EVVM (Enhanced Virtual Virtual Machine)—a customizable, permission-based virtual blockchain that operates on top of an existing host chain like Ethereum or Arbitrum. This workshop walks beginners through how EVVM leverages smart contracts to create virtual blockchains with unique states and functions, while inheriting the host chain’s security and connections.

Kevin demonstrates the GitHub structure for EVBN projects, including key repos such as testnet contracts, name service, and staking, and explains how to use pre-deployed contracts on Sepolia testnet. He then dives into practical transactions, covering payment functions, nonce mechanisms (synchronous vs. asynchronous), and the use of executors to securely authorize and execute transactions. The session concludes with examples of transaction validation, nonce protection, and how EVVM ensures replay safety and role-restricted execution.

00:11 Introduction — What is EVVM and its purpose
00:44 How EVVM builds virtual blockchains on host chains
01:09 Exploring EVBN GitHub repositories
01:37 Key repos: testnet contracts, name service, staking
02:11 Overview of core contract functions (pay, payMultiple, dispersePay)
02:59 Staking mechanisms and estimators
03:47 Quick start: deploying your own EVVM instance
04:36 Tools and utilities on evbn.info (faucet, staking, name service)
05:04 Using pre-deployed EVVM on Sepolia testnet
05:48 Transaction flow overview and execution via front end
06:18 Executing a payment transaction example
06:52 Understanding nonces: synchronous vs. asynchronous
07:28 Async nonce advantages and transaction signing
08:52 Replay protection and failed async nonce example
09:51 Introducing executors for transaction authorization
10:32 Creating and signing executor-based transactions
11:07 Successful execution with correct executor
11:39 Failed transaction when executor mismatch
12:16 Validation process: sender vs. executor verification
12:38 Recap of execution workflow and permission validation

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💻 ETHOnline 2025
This workshop is specifically for ETHOnline 2025, a 21-day hackathon held October 10 - 31, 2025, bringing together the most skilled web3 developers, designers and product builders from all around the globe for a weekend-long adventure to advance the Ethereum ecosystem!

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