Solidity · Foundry
UniversalDelegate on GitHub (opens in a new tab)
A singleton delegate contract for EIP-7702. Any EOA can point to it for batch calls, session keys and gas sponsorship, with no contract deployed per account.
Hi, I'm Furi.
I run blockchain nodes, build small tools for web3 developers and write step-by-step guides about the setups I run.
Most of my time goes into validators and testnet nodes on Cosmos and Ethereum networks, smart contract tooling in Solidity and TypeScript, and lately AI agents.
Selected projects
All repositories on GitHub (opens in a new tab)Node.js · Playwright · LLM
ARBITRAGE-PEDIA on GitHub (opens in a new tab)
An LLM agent that screens Tokopedia, Shopee and Bukalapak for underpriced listings, scores how well they would resell and learns from each sale.
React · TypeScript · Express
Octra Wallet on GitHub (opens in a new tab)
A minimal wallet for the Octra mainnet. Import a key or wallet.json, check the balance and send OCT, with transactions signed locally.
TypeScript
Soneium SC Debugger on GitHub (opens in a new tab)
Fetch a contract's ABI, encode calldata, estimate gas and send transactions on Soneium from one screen.
Shell · Docker
Aztec Sequencer Node on GitHub (opens in a new tab)
A one-line installer for an Aztec sequencer node, with commands to follow the logs and check the proven block height.
C · RISC-V
Thru Alphanet walkthrough on GitHub (opens in a new tab)
A complete walkthrough of the Thru testnet: the CLI, accounts, C smart contracts on RISC-V, custom tokens and domain names.
Latest guides
All guidesLatest guide10 min read
Shrink Docker images with multi-stage builds
You will build a small TypeScript API into a multi-stage Docker image with a distroless runtime that runs as a non-root user, then compare its size with a…
docker buildx versionmkdir tiny-api && cd tiny-apinpm init -ynpm install express@5npm install --save-dev typescript@7 @types/node@24 @types/express@5npm pkg set type=module scripts.build=tsc scripts.start="node dist/server.js"11 min read
Monitor a CometBFT node with Prometheus and Grafana
Set up Prometheus to scrape CometBFT and host metrics, Grafana to chart them, and alerts that fire when the node stalls, loses peers or misses blocks. It is for…
11 min read
Find the commit that broke your build with git bisect
You will find the commit that broke a build or a test with git bisect, first by hand and then automatically with a test script. The guide is for developers who…
13 min read
Relay IBC packets with Hermes
This guide is for node operators who want to relay IBC packets between Cosmos Hub and Osmosis. At the end, Hermes relays on the existing transfer channel with…
Have a node to run or a tool to build?
I take on node setups, smart contract tooling and small web3 projects. Tell me what you need and I will reply by email.