Ethereum
Screenshots
The Story
Ethereum is a public blockchain whose distinguishing feature is that it executes general-purpose programs. A smart contract is code deployed to the network, and any account can call it, which turns the chain from a payments ledger into a platform other applications are built on.
The network is maintained by validators who stake ether and are rewarded for proposing and attesting to blocks, with penalties for misbehaviour. Because every node verifies every transaction, the state of the chain is agreed without a central operator. Fees are paid in ether and scale with the computational work a transaction requires.
The tradeoffs are the reason alternative chains exist. Throughput is limited by the requirement that every node process every transaction, so fees rise when demand is high. Contracts are immutable once deployed unless written to be upgradeable, which means a bug can be permanent. And the account model puts the burden of key management on the user, where a lost key means lost funds.
Overview
Ethereum's contribution was to make the blockchain a general computation platform, which is what allows applications to be built on it.
A smart contract is code deployed to the network with its own address. Any account can call it, and the call executes deterministically on every node, so the result is agreed without an intermediary. That generalises the ledger from recording who paid whom into running whatever logic the contract encodes.
Consensus is maintained by validators. They stake ether, propose and attest to blocks, and are rewarded for honest participation and penalised for provable misbehaviour. Because every node verifies every transaction, the chain's state is not dependent on trusting an operator, which is the property the applications built on it inherit.
The costs are structural. Requiring every node to process every transaction caps throughput, so fees rise when demand does. A deployed contract is immutable unless it was written to be upgradeable, so an error can be permanent. And because accounts are controlled by keys rather than by a recovery process, a lost key means lost funds.
Key Features
- General-purpose smart contracts
Deployed code executes deterministically on every node, so applications inherit the chain's guarantees.
- Proof-of-stake consensus
Validators stake ether to propose and attest to blocks, with penalties for provable misbehaviour.
- Open participation
Anyone can run a node, deploy a contract, or submit a transaction without permission.
- Composable contracts
Contracts can call each other, which is what lets applications be assembled from existing protocols.
Where Ethereum is a strong choice, and where it is not
Choose Ethereum when an application needs a public, verifiable state that no single operator controls, and the cost per transaction is acceptable for the use case.
Look elsewhere if the application needs high throughput at low cost, or if the data does not need to be publicly verifiable. A conventional database is faster and cheaper for most software.
Getting started
Reading the chain is free; a first transaction needs a wallet and gas.
- ~15 minTime to first transaction
Set up a wallet, fund it, and send. A testnet removes the cost while learning.
- Gas per transactionCost to start
Every transaction pays a fee in ether that scales with the computational work required.
- A walletPrerequisites
A self-custody wallet and some ether for gas.
Known limitations
Constraints confirmed from the network's documentation.
- Throughput is capped by design. Requiring every node to process every transaction means fees rise when demand does.
- Deployed contracts are immutable unless written to be upgradeable, so a bug can be permanent.
- A lost key means lost funds. There is no recovery process and no support to appeal to.
- Gas is unpredictable. A fee estimated at one moment can change before the transaction confirms.
Pick Ethereum when the state must be publicly verifiable
It runs general-purpose programs that any account can call, which is what allows applications to be built without a trusted operator.
The differentiator is verifiability: every node checks every transaction, so the result does not depend on trusting a company.
If the application needs high throughput at low cost, or the data does not need to be publicly verifiable, a conventional database is faster and cheaper.
FAQ
What is Ethereum?
Ethereum is a public blockchain that executes general-purpose smart contracts, secured by validators who stake ether.
Is Ethereum free to use?
The network is open, but every transaction pays a gas fee in ether that scales with the computational work required.
What is a smart contract?
Code deployed to the network with its own address that any account can call, executing deterministically on every node.
How is the network secured?
Validators stake ether to propose and attest to blocks, earning rewards for honest participation and penalties for misbehaviour.
What stack is Ethereum built with?
CompassPad records Ethereum clients implemented in Go, Rust, and other languages, with Solidity as the dominant contract language.
What we checked
- LIVESite and primary link
The marketing site resolved and the primary product link reached the application.
- PRICINGPricing page
The network is open and permissionless; transaction fees are paid in ether and scale with computational work.
- DOCSDocumentation
Developer documentation is public and covers contracts, consensus, and nodes.
- FRESHNESSChangelog
A dated public history page records network upgrades and is reachable without an account.
Discussion
No comments yet. Be the first.
Join the conversation. Sign up to comment.
Sign up free
