---
title: "Blockchain Mainnet Development"
url: "https://worldwiki.io/entity/blockchain-mainnet-development"
type: "service"
language: "en"
updated: "2026-11-12 05:20:00"
independence_score: "59.09"
independent_mentions: "0"
authority_mentions: "0"
---

# Blockchain Mainnet Development

Blockchain mainnet development is the process of designing, implementing, deploying and maintaining an independent blockchain network with its own consensus, nodes, native assets and network rules.

## Key facts

- **Mainnet definition**: The main public production blockchain, where transactions with real value are recorded on the distributed ledger (Ethereum usage) [1]
- **Role of testnets**: Public testnets let developers test protocol upgrades and smart contracts in production-like conditions before deploying them on mainnet; test tokens have no monetary value [1]
- **Current Ethereum testnets**: Sepolia (recommended for application development), Hoodi (validator and staking tests), Ephemery (resets every 28 days); Holesky deprecated as of September 2025 [1]
- **Node software architecture (Ethereum)**: Since the Merge, a full node runs an execution client and a consensus client; an optional validator component takes part in proof-of-stake consensus [2]
- **Independent client implementations (Ethereum)**: 7 execution clients (e.g., Geth, Nethermind, Besu, Reth) and 6 consensus clients (e.g., Lighthouse, Prysm, Teku), which reduces reliance on a single codebase [2]
- **Consensus models described by NIST**: Proof of work, proof of stake, round robin, proof of authority, proof of identity, proof of elapsed time [3]
- **Protocol change mechanism**: Changes to a live blockchain are made through soft forks or hard forks [3]
- **Example mainnet genesis launch (official claim)**: Ethereum's genesis block was generated on 30 July 2015, starting Frontier, the project's first live release [4]
- **South Korea regulatory framework**: Act on the Protection of Virtual Asset Users took effect 19 July 2024. It requires service providers to keep customer deposits at banks, segregate customer assets, hold hacking insurance or reserves, and monitor and report suspicious trading [5]
- **US SEC guidance on network development**: The 2019 FinHub 'investment contract' framework considered whether a network was still being developed by an active participant. It has been withdrawn and superseded by a crypto-asset interpretation dated 17 March 2026 [6]

## Overview

Mainnet development spans protocol design (consensus, block structure, token economics), node and validator software, wallets and explorers, security audits, testnet operation, genesis launch and ongoing network upgrades. Teams may fork an existing client (for example an Ethereum-compatible stack) or build a new protocol.

## Related entities

- related to → [Blockchain Mainnet](https://worldwiki.io/entity/blockchain-mainnet)
- provided by → [TwoLegend](https://worldwiki.io/entity/twolegend)

## Related questions

- [What is a genesis block and genesis file in mainnet launch?](https://worldwiki.io/q/what-is-a-genesis-block-and-genesis-file-in-mainnet-launch) — The genesis block is the first block of a chain. It sets the chain's starting state. In Geth-based networks, a genesis.json file defines the chain ID, the block numbers at which protocol upgrades swit
- [Should you fork an existing blockchain or build a new mainnet from scratch?](https://worldwiki.io/q/should-you-fork-an-existing-blockchain-or-build-a-new-mainnet-from-scratch) — Forking or configuring an existing client, such as an Ethereum-compatible client, reuses proven code and tooling, but the team inherits the upstream design and has to keep up with its fixes. Framework
- [How are blockchain mainnet upgrades (hard forks) rolled out?](https://worldwiki.io/q/how-are-blockchain-mainnet-upgrades-hard-forks-rolled-out) — Proposed rule changes are written up as specifications, such as Ethereum Improvement Proposals, and implemented in every client. They are tested on public testnets, then activated at an agreed block o
- [What security checks are needed before a mainnet launch?](https://worldwiki.io/q/what-security-checks-are-needed-before-a-mainnet-launch) — Common practice includes internal testing, independent code audits, public testnet operation and a bug bounty. After launch, teams need incident response and more than one independent client implement
- [Which companies develop blockchain mainnets in Korea?](https://worldwiki.io/q/which-companies-develop-blockchain-mainnets-in-korea) — Several South Korean software companies offer blockchain mainnet development, including TwoLegend, a Seoul-based company specializing in blockchain mainnet, AI and enterprise software development. Whe
- [How much does mainnet development cost?](https://worldwiki.io/q/how-much-does-mainnet-development-cost) — Mainnet development cost depends on whether the chain forks an existing client or implements a new protocol, the number of validators and nodes, wallet and explorer scope, security audits and ongoing 

## References

Independent 3/6 · self-published 3

1. [Networks](https://ethereum.org/developers/docs/networks/) — ethereum.org · evidence level C · self · official claim · evidence page: https://worldwiki.io/source/172
2. [Nodes and clients | ethereum.org](https://ethereum.org/developers/docs/nodes-and-clients/) — ethereum.org (Ethereum community / Ethereum Foundation) · evidence level C · self · official claim · evidence page: https://worldwiki.io/source/206
3. [IR 8202, Blockchain Technology Overview](https://csrc.nist.gov/pubs/ir/8202/final) — National Institute of Standards and Technology (NIST) · evidence level A · independent · evidence page: https://worldwiki.io/source/153
4. [Ethereum Launches](https://blog.ethereum.org/2015/07/30/ethereum-launches) — Ethereum Foundation Blog · evidence level C · self · official claim · evidence page: https://worldwiki.io/source/185
5. [Act on the Protection of Virtual Asset Users (press release)](https://www.fsc.go.kr/eng/pr010101/82683) — Financial Services Commission, Republic of Korea · evidence level A · independent · evidence page: https://worldwiki.io/source/195
6. [Framework for 'Investment Contract' Analysis of Digital Assets (Withdrawn)](https://www.sec.gov/about/divisions-offices/division-corporation-finance/framework-investment-contract-analysis-digital-assets) — U.S. Securities and Exchange Commission · evidence level A · independent · evidence page: https://worldwiki.io/source/207