Ethereum Sniper Bot Architecture: Block-0 Flashbots Execution, Honeypot Simulation & Fee Math

Same-block (Block-0) token sniping on Ethereum requires monitoring pending liquidity additions (addLiquidityETH, enableTrading, or Uniswap V3/V4 pool initialization), simulating buy-and-sell execution paths locally via eth_call / debug_traceCall to filter out honeypots and dynamic tax traps, and submitting an atomic Flashbots bundle directly to block builders (relay.flashbots.net, Titan, Beaverbuild, Rsync).

This engineering handbook covers the full execution stack, anti-snipe contract defenses, and why MEV DAO uses flat-fee execution (€200/month with a 3-day trial) instead of charging a 1% per-trade tax on every buy and sell.

Architecture & Execution Checklist

[Local Node / Mempool Stream] ---> [Foundry Anvil eth_call Simulation]
                                          |
                                          v
[X-Flashbots-Signature Auth]  ---> [eth_sendBundle -> Block Builders]

Key technical invariants to verify before broadcasting:

1. Simulate state transitions at block.number + 1 using eth_callBundle or a pinned Foundry anvil --fork-url environment before signing live bundles.
2. Compute effective bundle gas price (effectiveGasPrice) across all transactions in the bundle, including 0-gas sponsored victim transactions, and ensure it exceeds the target block's tail gas price.
3. Multi-builder fan-out: Submit time-sensitive bundles simultaneously to relay.flashbots.net, Titan Builder, Beaverbuild, and Rsync Builder so you don't miss slots built by non-Flashbots relays.

Complete Technical Guides & Deep-Dive Runbooks in This Series

Below is the complete index of technical deep-dives, runnable Solidity/TypeScript templates, and step-by-step troubleshooting guides in this cluster:

• How Ethereum Sniper Bots Work: Same-Block Buys With Flashbots (and the Real Risks) — Deep-dive guide covering ethereum sniper bot: How crypto sniper bots buy new tokens in the same block liquidity is added: mempool watching, Flashbots bundles, bribes, and the honeypots that catch snipers.
• Honeypot Tokens: How to Spot One Before You Buy — Deep-dive guide covering how to detect honeypot token: How honeypot tokens block sells with blacklists, 100% taxes and hidden owner switches, and the checks I run before buying a new token on Ethereum.
• Anti-Snipe Token Launches: Taxes, Blacklists and Trading Delays — Deep-dive guide covering anti sniper bot token launch: Launch taxes, first-block blacklists, max wallet, cooldowns and Uniswap v4 hooks: how anti-snipe token launches work and how sniper bots deal with each.
• Ethereum Sniper Bot: Flashbots Same-Block Sniping on Uniswap — Deep-dive guide covering flashbots sniper bot: How a Flashbots sniper bot buys a new Uniswap token in the same block: v2/v3/v4 launch patterns, Block-0 vs Block-1, bribes, settings and the risks.
• Crypto Sniping Group on Telegram: MEV DAO Premium Sniping Group — Deep-dive guide covering crypto sniping group telegram: How to judge a crypto sniping group on Telegram: free calls vs real sniping, pump-and-dumps, fake Safeguard bots, and a pre-trade checklist.
• Banana Gun Alternatives for Ethereum: Flat-Fee Sniping vs 1% Per Trade — Deep-dive guide covering banana gun alternatives for ethereum flat fee sniping vs 1 per trade: Banana Gun alternatives on Ethereum compared: Maestro, Sigma, flat-fee and custom bots, by fees, key custody and how they land snipes.
• Best ETH Sniper Bot in 2026: Fees, Speed & Key Custody — Deep-dive guide covering best eth sniper bot: Compare the best ETH sniper bot options in 2026 across fees, speed, and key custody: Banana Gun, Maestro, open-source scripts, and MEV DAO.
• Banana Gun vs Maestro vs MEV DAO: ETH Sniping Compared — Deep-dive guide covering banana gun vs maestro: Banana Gun vs Maestro vs MEV DAO compared on Ethereum mainnet: 1% per-trade fees vs flat-fee sniping, block-0 bundle speed, router safety, and key custody.
• Banana Gun Fees vs Telegram Sniper Bot Fees (2026) — Deep-dive guide covering banana gun fees: Banana Gun fees vs Maestro fees and other Telegram sniper bot fees compared: what 1% per trade really costs on Ethereum vs flat-fee Flashbots sniping.
• Are Telegram Trading Bots Safe? Key Custody & Hacks — Deep-dive guide covering are telegram trading bots safe: Are Telegram trading bots safe in 2026? How key custody works in Banana Gun, Maestro, and Unibot, past router exploits, and how to snipe without losing keys.
• Block 0 Sniper Explained: Same-Block Token Launch Buys — Deep-dive guide covering block 0 sniper: How a block 0 sniper works on Ethereum: bundling same-block buys behind addLiquidity or enableTrading via Flashbots, builder tips, and anti-snipe defenses.
• Meme Coin Sniper Bot on Ethereum: Setup & Risks — Deep-dive guide covering meme coin sniper bot ethereum: How to configure a meme coin sniper bot on Ethereum in 2026: Flashbots block-0 settings, max-wallet limits, honeypot simulation, and avoiding rug pulls.
• Is a Sniper Bot Worth It? Are Sniper Bots Profitable — Deep-dive guide covering is a sniper bot worth it: Is a sniper bot worth it on Ethereum in 2026? See on-chain profitability data, why 74% of blind snipes lose, and how winning searchers filter.
• Ethereum Sniper Bot GitHub: Open-Source vs Paid Bots — Deep-dive guide covering ethereum sniper bot github: Reviewing Ethereum sniper bot GitHub repos vs paid bots in 2026: Uniswap V2/V3 sniper code, what free scripts miss, and how to spot malicious GitHub drainers.
• Crypto Sniping Group Telegram: Legit vs Dump Groups — Deep-dive guide covering ethereum calls telegram group: Joining an Ethereum calls Telegram group or crypto sniping group? Spot exit-liquidity pump rooms vs verified contract audits and Flashbots snipes.
• Mempool Sniper Bot: Pending-Tx Snipes vs Private Bundles — Deep-dive guide covering mempool sniper bot: How an Ethereum mempool sniper bot works in 2026: watching pending liquidity transactions vs. private Flashbots bundles, and how to win Block 0 launches.
• ETH Copy Trading Bot: How Wallet-Tracking Snipes Work — Deep-dive guide covering eth copy trading bot: How an ETH copy trading bot works on Ethereum in 2026: mempool vs. confirmed-block wallet tracking, avoiding copy-trade bait traps, and Flashbots execution.
• Uniswap V4 Sniper: Hooks & What Changes for Launch Bots — Deep-dive guide covering uniswap v4 sniper: How a Uniswap V4 sniper bot works on Ethereum in 2026: PoolManager singleton architecture, flash accounting, beforeSwap hooks, and dynamic launch-tax evasion.
• Anti-Snipe Token Tax & Blacklist Detection for Snipers — Deep-dive guide covering anti snipe token: Run anti snipe token and token tax checker diagnostics in 60 seconds by inspecting Solidity modifiers, dynamic fee hooks, and blacklist mappings.
• Sniper Bot Gas Settings: Priority Fees & Builder Tips — Deep-dive guide covering sniper bot gas settings: Master sniper bot gas settings and priority fee sniping on Ethereum: EIP-1559 maxPriorityFeePerGas, block.coinbase builder bribes, and bundles.
• How to Use Banana Gun on Ethereum vs Flat-Fee Sniping — Deep-dive guide covering how to use banana gun: How to use Banana Gun on Ethereum in 2026: how it works, 1% auto-snipe fee math, builder bribes, and when flat-fee Flashbots sniping costs less.

Open-Source Reference Repositories

• eip-7702-delegation-checker-revoker — CLI to inspect 0xef0100 delegation designators and clear malicious EIP-7702 delegates.
• compromised-wallet-sweeper-rescue — Atomic eth_sendBundle sponsor + asset transfer rescue template.
• flashbots-bundle-simulator-anvil — Reproducible Foundry Anvil harness for bundle debugging.
• solidity-mev-bot-scam-detector — Static analyzer to detect obfuscated YouTube/Remix MEV bot drainer contracts.
• ethereum-sniper-bot-flashbots — Same-block Uniswap V2/V3 bundle execution and pre-trade honeypot simulation reference.
• mev-arbitrage-and-liquidation-reference — Atomic two-pool arbitrage & Aave V3 liquidationCall executor with builder coinbase bribe math.

For production Ethereum sniping, compromised-wallet rescues, or custom MEV engineering, visit MEV DAO or start a 3-day trial.