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megaeth

Guides MegaETH development with instant receipts, gas model, storage optimization, and ERC-7710 delegations.

6|20|Updated Mar 14, 2026
Search Tags:#smart contracts#viem#gas optimization#evm#megaeth#blockchain development#erc-7710
One-click install
npx skills add https://github.com/andresdefi/cryptoskills --skill megaeth-andresdefi
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: megaeth
Source: https://github.com/andresdefi/cryptoskills/tree/main/skills/megaeth
Command: npx skills add https://github.com/andresdefi/cryptoskills --skill megaeth-andresdefi

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires viem, @metamask/smart-accounts-kit, and includes references (resource) components.

What problem does it solve? AI agents and developers routinely apply standard Ethereum assumptions to MegaETH that are wrong: intrinsic gas is 60,000 not 21,000, local gas simulation produces incorrect estimates, and new storage slots cost 2M+ gas. This Skill provides verified chain configuration, RPC methods, gas model details, and contract addresses so transactions and contracts work correctly on MegaETH the first time. ## Core Features & Use Cases - Real-time transaction submission: Use eth_sendRawTransactionSync (EIP-7966) for receipts in under 10ms instead of polling, plus mini-block WebSocket subscriptions and cursor-paginated log queries. - Gas and storage optimization: Apply the dual gas model, SSTORE bucket multipliers, RedBlackTreeLib slot reuse, transient storage (EIP-1153), and SSTORE2 bytecode storage to avoid expensive state growth. - Protocol integrations: Register and resolve MegaNames (.mega) domains, build ERC-7710 scoped delegations with caveat enforcers, deploy MetaMask smart accounts, and host on-chain sites via Warren Protocol. - Use Case: A developer deploying a contract to MegaETH mainnet gets the correct chain ID (4326), RPC endpoints, Foundry flags (--skip-simulation, no via_ir), and verified contract addresses without hallucinated values. ## Quick Start Ask the agent to set up a viem client for MegaETH mainnet and send a transaction using eth_sendRawTransactionSync with the correct 60,000 intrinsic gas.

Frequently Asked Questions about megaeth

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I send a transaction on MegaETH with instant receipts?▼

Use eth_sendRawTransactionSync (EIP-7966) with a pre-signed transaction to get a full receipt in under 10ms instead of polling. MegaETH also supports the equivalent realtime_sendRawTransaction method, but the EIP-7966 variant is preferred for cross-chain compatibility.

What is the intrinsic gas cost for a MegaETH transaction?▼

MegaETH intrinsic gas is 60,000 (21K compute plus 39K storage), not the 21,000 used on Ethereum. A simple ETH transfer must set gas to at least 60,000 with a fixed base fee of 0.001 gwei and zero priority fee.

Why does Foundry gas estimation fail on MegaETH?▼

Foundry and Hardhat simulate with standard EVM opcode costs, which differ from MegaEVM, producing wrong estimates. Deploy with --skip-simulation and an explicit --gas-limit, or use remote eth_estimateGas against a MegaETH RPC endpoint.

How do I reduce storage gas costs on MegaETH?▼

New storage slots cost 2M+ gas scaled by a bucket multiplier, so reuse slots with Solady RedBlackTreeLib, circular buffers, or transient storage (EIP-1153). For large immutable data, SSTORE2 stores it as contract bytecode with free reads via EXTCODECOPY.

Can I use ERC-7710 delegations on MegaETH?▼

Yes, the MetaMask Delegation Framework works on MegaETH with deterministic contract addresses like DelegationManager at 0xdb9B1e94B5b69Df7e401DDbedE43491141047dB3. Create scoped delegations with caveat enforcers and redeem them via eth_sendRawTransactionSync for instant confirmation.

Why should I avoid via_ir in foundry.toml for MegaETH?▼

Setting via_ir=true silently breaks return values on MegaETH, causing functions to return 0 with no compiler error. Use optimizer=true with optimizer_runs=200 instead for safe compilation.

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