Ethereum (ETH): the Programmable Blockchain

What Ethereum is and when it launched#

Ethereum is an open blockchain network that launched in 2015. Where Bitcoin was designed primarily to move value, Ethereum was designed to run programs. Developers can deploy code to the network, and that code executes on every participating machine, producing the same result for everyone. The native asset, ETH, is the fuel that pays for that execution.

That shift from a single-purpose ledger to a shared computer is why Ethereum is usually described as infrastructure rather than as a currency play. The same network hosts token issuance, lending markets, exchanges, identity tools and countless applications that most users never see directly.

Smart contracts and the EVM#

A smart contract is a program that lives at an address on the network. It can hold assets, enforce conditions and be called by other programs, and once deployed its behaviour is determined by its code. The Ethereum Virtual Machine, or EVM, is the execution environment those contracts run in, and it is the piece of the design that spread furthest: many other chains adopted EVM compatibility so that the same tools and code could be reused.

The practical consequence for users is that a whole ecosystem of wallets, tokens and applications speaks one common set of standards. A token built to those standards works with wallets and platforms that support them, which is why Ethereum-compatible tooling is so widely available.

The move to proof of stake in 2022#

Ethereum originally secured its network with proof of work, the same style of mining Bitcoin uses. In 2022 the network switched to proof of stake, a change the community calls the Merge. Instead of competing with hardware, validators lock ETH as collateral and are rewarded for proposing and attesting to blocks, with penalties if they misbehave.

The switch removed mining from Ethereum entirely and cut the network's energy draw dramatically, which was one of its stated goals. It also changed the economics of holding ETH: staking became a way for participants to earn rewards while helping to secure the chain. Staking returns are variable and are not a fixed-income product, and locking assets with any provider carries its own risks.

How ETH is used and quoted#

ETH is used in three overlapping ways. It pays transaction fees, so anyone interacting with the network needs a small amount of it. It is staked to secure the chain and earn rewards. And it is traded as an asset in its own right, usually quoted against USDT on crypto exchanges and against the US dollar on venues with fiat access.

Network fees are the part that surprises newcomers most. Fees track demand for block space rather than the size of the transfer, so a simple transfer and a complex contract call can cost very different amounts, and both get more expensive when the network is busy. Official documentation is the right place to check current fee mechanics.

Where to check Ethereum market data#

This page carries a live market widget for quick reference and deliberately prints no price of its own. The official markets page is the reference for every ETH pair listed on Binance, including depth and historical charts, while the Ethereum project website documents the network itself.

1. Open the official markets page and select the ETH pair you care about.
2. Check the timestamp and the quote currency of the data you are reading.
3. Cross-check network facts such as staking and fees on the Ethereum project site.
4. Review fee mechanics in the official developer documentation before building anything.

Blockchain explorers: checking an Ethereum transaction yourself#

Ethereum transactions and addresses are public, and a blockchain explorer is the tool that turns that raw ledger data into something readable. To see whether a transfer arrived, how much ETH an address holds, or what gas has been costing lately, an explorer is more reliable than asking anyone.

The best-known explorer is Etherscan. Chinese-language users often search for "欧科云链" (OKLink), which is a separate explorer provider — like Etherscan it is an independent third-party tool, not an official Ethereum product and not connected to this site. Both read the same public chain and differ only in interface and extra features.

1. Find the transaction hash in your wallet or on the exchange's withdrawal record — the string starting with 0x — and copy it.
2. Open any blockchain explorer and paste the hash into its search box.
3. Read the status: Success means it is on-chain, Pending means it is still waiting to be included. More confirmations means the transaction is harder to reverse.
4. If the explorer cannot find the transaction at all, it may not be included yet, or the hash you copied may be incomplete.