Dev Tools Guild October update

TL;DR: Fusaka upgrade on mainnet December 3, Gitcoin Grants 24 included quadratic & deep funding for developer tooling and Optimism's Retro Funding continues to support member projects.

Dev Tools Guild members

• Gitcoin Grants 24 (GG24) included quadratic funding and deep funding for developer tooling & infrastructure projects/repositories.
• Optimism's Retro Funding: Dev Tooling continues to support Solidity, Vyper, alloy, ethers.js, viem, web3.py, Ape Framework, Foundry, Scaffold-ETH and Sourcify.

Smart Contract Languages

Solidity

• Road to Core Solidity:
  • Core Solidity is a planned revamp of the language with a minimalist standard library, Classic Solidity is the language supported by solc today with planned breaking releases.
  • Call for feedback.
• Solidity added pre-releases for developers to try out experimental features:
  • Solidity v0.8.31-pre.1: adds EIP-7939 CLZ opcode support which results in cheaper compute & ZK proving costs and smaller bytecode size.
• Solidity Summit November 18 at Devconnect in Buenos Aires: apply for your ticket.
  • First round of Solidity Summit speakers.

Vyper

• Institutional adoption of Vyper presentation at Stablecoin Summit.
• Vyper joined the Circle Alliance Program.

Client Libraries

alloy (Rust)

• alloy v1.0.38 - v1.0.42.

viem (TypeScript)

• viem 2.37.10 - 2.38.6; v2.38.0 added sendTransactionSync, sendRawTransactionSync, writeContractSync and sendCallsSync.
• App developers using viem & wagmi for ENS resolution should update to v2.35+ for automatic support when ENSv2 launches.

Web3j

• ERC-4337 smart account tutorial: create, deploy & interact with smart accounts using Web3j.

Frameworks and Dev Environments

Ape Framework

• Ape Framework adding support for Python 3.14 (where possible) and deprecating support for Python 3.9 (end of life).

Foundry

• Foundry v1.3.7 - v1.4.4
  • v1.4.0 is Fusaka upgrade ready, forge is published as an npm package, improves performance up to 11% for forge coverage & fuzzed tests, adds a formatter built on Solar, improved handling of multichain configs and deployments and improved testing/debugging with backtraces & custom network precompiles.

Standardisation Tooling

Sourcify

• Remix v1.1.0 adds Deploy & Verify: verify when deploying contracts with all verifiers.
• Sourcify took over samczsun's openchain 4byte signature APIs.
  • Analyzing 4byte selector collisions shows 648 non-spam collisions.

Ethereum Layer 1

Gas limit increase

• Clients increased default gas limit to 60M (up from 45M): Erigon v3.2.1, Geth v1.16.4, Nethermind v1.35.0, Reth v1.4.8 and Teku 25.10.0.

🦓 Fusaka upgrade (December 3 2025)

• Headliner: L2 scaling via EIP-7594 PeerDAS and EIP-7892 Blob parameter only upgrades.
• mainnet upgrades to Fusaka on December 3.
• Blob Parameter Only (BPO) upgrades (increase blobs per block target and maximum parameters):
  • BPO1: 10/15 (target/max blobs per block) December 9.
  • BPO2: 14/21 (target/max blobs per block) January 7, 2026.
• Holešky, Sepolia & Hoodi testnets were all successfully upgraded.
• Fusaka $2M audit contest ended, no issues requiring postponement of the upgrade.
• Note for devs:
  • EIP-7825: transaction gas limit cap of ~16.8M gas.
  • EIP-7594: PeerDAS changes format for proofs from blob proofs to cell proofs.

Glamsterdam upgrade (target 2026)

• Headliners:
  • Consensus layer: EIP-7732 ePBS.
  • Execution layer: EIP-7928 Block-level Access Lists.
• Non-headliners:
  • EIPs proposed for inclusion (40+) are being reviewed by client teams to define scope.
  • Rank non-headliner EIPs on Forkcast and share on socials to signal your priorities.

Heka + Bogotá upgrade

• Heka selected as H-star name.

Holešky testnet

• Holešky was deprecated after upgrading to Fusaka, BPO1 & BPO2 and is no longer finalizing. Migrate to Hoodi testnet for infrastructure testing or Sepolia testnet for app layer testing.

Privacy

• Ethereum Foundation expanding privacy efforts: initiatives include private reads & writes, private proving, private identities, privacy experince, institutional privacy task force and Kohaku (wallet SDK & reference implementation of a browser extension).

EF internships

• 2026 EF Internships: 12 weeks over northern hemisphere summer, applications close December 1.

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Support Dev Tools Guild members by donating to donate.devtoolsguild.eth on mainnet, Arbitrum, Base and Optimism. Donations of all sizes are greatly appreciated.