Walnut
Walnut is a transaction debugger and simulator for Starknet and EVM developers, with playgrounds, an OP Stack explorer, and a Solidity debugger.
What is Walnut?
Walnut builds open-source developer infrastructure for smart contract engineers. Teams use it to step through transactions, simulate calls, and inspect execution on Starknet, Arbitrum, Base, Optimism, and Ethereum. It ships a Cairo playground, an OP Stack block explorer (OP Scan), and SolDB, a CLI debugger for Solidity built with the Ethereum Foundation and Argot Collective.
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WakeApp store listings are independently reviewed and written by Alchemy using a combination of inbound submissions, editorial research, public project sources, and third-party directories, including ecosystem data from The Grid under the Open Database License, DefiLlama, DappRadar, Reown, and chain ecosystem pages.
