Topic
BitcoinIntermediateThe Lightning Network moves Bitcoin payments into two-party channels, so only opening and closing usually touch the blockchain. Learn how HTLCs route payments, why inbound capacity matters, what watchtowers do, what a force close costs, and its limits.
#scaling#transactions
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
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
GeneralBeginnerWallet drainers steal crypto through permissions you sign, not your seed phrase. Learn how token approvals, permit signatures, setApprovalForAll and EIP-7702 delegation phishing work, what to check before signing, and how to revoke approvals.
#security#transactions#wallets
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
