Layer 1
The programmable blockchain behind smart contracts and DeFi.
A proof-of-stake blockchain whose EVM runs smart contracts written in Solidity or Vyper. Home to most DeFi, NFTs and token standards (ERC-20, ERC-721), and the settlement layer for a growing ecosystem of rollups.
EthereumBeginnerA field-by-field Etherscan walkthrough using a real transaction: status, block, value, gas, input data, logs and token transfers. Learn to tell failed from pending and dropped, spot token approvals, check a contract, and read other chains' explorers.
#basics#gas-&-fees#transactions
EthereumIntermediateAccount abstraction lets code decide how an Ethereum account approves transactions, enabling recovery, sponsored gas, batching and passkeys. ERC-4337 uses bundlers and paymasters. EIP-7702 lets existing addresses run contract code, but their original key keeps full control.
#account-abstraction#gas-&-fees#wallets
EthereumAdvancedMEV is the profit made by choosing which transactions enter a block and in what order. On public DEX swaps, a bot can sandwich your trade and push you to the worst price your slippage allows. Tight limits, private RPCs and intents reduce the risk.
#defi#mev#transactions
EthereumBeginnerEthereum is a programmable blockchain that runs smart contracts, while Bitcoin is built mainly as fixed-supply digital money. Compare their accounts and UTXOs, the EVM, monetary policy, proof of stake and proof of work, and upgrade styles.
#basics#smart-contracts#staking
EthereumBeginnerA smart contract is code stored on a blockchain that runs automatically and is enforced by the whole network. It holds its own funds and rules, executes deterministically on every node for a gas fee, and powers tokens, DeFi, NFTs and DAOs — bugs and all.
#basics#dapp-development#smart-contracts
EthereumIntermediateA layer 2 runs on top of a base chain like Ethereum for cheap, fast transactions while inheriting its security. Rollups execute off-chain, then post compressed data back to Ethereum — optimistic ones use fraud proofs, zk ones use validity proofs.
#bridges#consensus#scaling
EthereumBeginnerGas fees pay a blockchain to process your transaction, measured as gas used times gas price. Since EIP-1559 the price splits into an automatic base fee that's burned plus a priority tip, and it rises and falls with how full blocks are.
#basics#gas-&-fees#transactions
EthereumAdvancedRestaking reuses staked ETH to secure extra services. In EigenLayer, restakers delegate to operators who run software for AVSs and earn more rewards, but each AVS can slash the stake allocated to it, stacking new risks on top.
#defi#security#staking
EthereumIntermediateLiquid staking gives you a token for staked ETH, like stETH or rETH, that keeps earning rewards while usable in DeFi. The main risks are contract bugs, slashing, the token trading below its ETH value, and stake centralization.
#consensus#defi#security
EthereumIntermediateUniswap prices tokens from its own reserves: in a constant product pool x * y = k, so the price is the reserve ratio and every trade moves it. Arbitrage keeps pools in line with the market, while LPs bear impermanent loss.
#defi#markets#smart-contracts
EthereumBeginnerA stablecoin is a token built to track $1. Its peg holds because anyone eligible can mint or redeem near $1, so arbitrage corrects drift. Backing ranges from fiat reserves to over-collateralized crypto to hedged derivatives.
#defi#regulation#stablecoins
