Week in Ethereum News
September 25, 2021

Eth News and Links

Mainnet execution layer

  • December upgrade proposed as difficulty bomb delay only, named Arrow Glacier
  • Erigon v2021.09.04: reimplements transaction pool as separable (separate process/computer and multiple processes for one node)
  • Nethermind v1.11.3: performance optimization in JSON-RPC and transactions broadcasting


Proof of stake consensus layer


  • An exhaustive list of projects on Arbitrum (caveat emptor, as always)
  • Avoid long optimistic rollup withdrawal delays: use Celer cBridge 2.0 with improved user experience and LPs have option not to run a cBridge node
  • Aztec increases caps to 30 ETH, 100k DAI and 2 renBTC for private transactions on its zk rollup
  • Bitfinex directly supports bridge to DeversiFi (StarkWare-based layer2), starting with USDT
  • Solidity to Cairo transpiler switched from transpiling EVM opcodes to using a combination of Solidity & Yul AST
  • Censorship resistance: Arbitrum and Optimism users can force transactions to layer1 whilst StarkWare layer2s use app specific mechanisms
  • Geohot returns: cannon, on chain interactive fraud prover

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Stuff for developers

  • Ganache v7.0.0 alpha.1: local blockchain (formerly ganache-cli), London EIP1559 support
  • web3.js v1.5.3: fix for sending legacy transactions on London networks
  • Discussion on whether Solidity libraries should behave like contracts
  • Hardhat Ignition: deployment system for structuring, automating, and distributing contract deployment setups, in development for 2022
  • eth-hooks (TypeScript): commonly used hooks such as balances, provider, contract loader and ENS resolver, from scaffold-eth
  • gas-estimation: MyCrypto EIP1559 library, uses last 10 blocks from an Ethereum node
  • Moloch v3 proposal (codenamed Baal): adds Compound-style delegation, DAO controlled share and loot transferability
  • nile (for Cairo): compile and manage artifacts for StarkNet projects, install Cairo language
  • Guide to create ERC20 payment splitter using OpenZeppelin & Hardhat
  • Full Knowledge User Proofs: pattern using call data with a user proof than paying gas to read from storage
  • Guide to using GitHub with Remix
  • Beginner: first Solidity contract using Hardhat with tests & verification
  • MyCrypto’s guide to creating a profile pic NFT 


  • Detection of an NFT drop, using on chain and off chain information, same was detected for Time NFTs
  • pNetwork bridge $12 million exploit, event logs for attack contract processed in error by Rust code on pNetwork’s bridge client, only one BSC bridge exploited



Application layer

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