From-Scratch Build · 08 · Blockchain × Robotics
Can a swarm of robots agree on who does what — and prove they did it — with no central boss, using a blockchain as the referee? This build unpacks how ROS meets Ethereum smart contracts to make that work.
What it is
This is a blockchain-based framework that gives multi-robot systems trust and accountability. It marries the Robot Operating System with Ethereum smart contracts to form a Decentralized Autonomous Organization (DAO) for robotic task management — robots advertise capabilities, bid on work, and get paid (released from escrow) only once an oracle confirms they actually did the job.
This is the most conceptually ambitious project in the set, and that's the point: it sits at the intersection of three worlds I wanted to understand at once — robotics, distributed ledgers, and the oracle problem of bridging the physical and on-chain.
The core idea I wanted to learn: "trustless" coordination. Without a central controller, how do robots agree and hold each other accountable? Answer: encode the rules in a smart contract, lock payment in escrow, and let a verification oracle decide whether reality matched the promise.
The stack
Solidity contracts that encode how the organization is governed — the rules of task allocation and payment.
A local Ethereum blockchain in Docker for development — the ledger everything is recorded on.
Bidirectional glue so robots can broadcast needs and capabilities to the chain, and react to on-chain events.
Checks that a robot's physical actions (paths, sensor data) met the spec before the on-chain verdict releases escrow.
A web UI for managing the DAO — watching tasks, capabilities and outcomes.
The whole stack — chain, contracts, bridge, oracle — comes up reproducibly in containers.
How it works
Through the bridge, a robot or organization broadcasts a need — or advertises a capability — to the DAO.
A smart contract matches need to capability under the organization's governance rules, locking payment in escrow.
The assigned robot performs the physical task; ROS topics carry the real-world telemetry.
The oracle compares actual paths/sensor data against the task spec — did it really happen?
On a positive verdict the contract releases the escrow. Trust without a trusted middleman.
Reflection
docker compose up is what makes it reproducible.