Ledger LandISSUE #24 of 90

ethereum · the programmable chain

BlockyVSDouble-Spend Dan

Blocky saysEthereum is the programmable blockchain — a world computer running smart contracts.

Where Bitcoin is mainly money, Ethereum added a Turing-complete virtual machine so anyone can deploy smart contracts — programs that run exactly as written on the chain. This turned blockchain into a platform for tokens, DeFi, NFTs, DAOs, and more. Ether (ETH) is both the asset and the "gas" that pays for computation. Since 2022 it runs on Proof of Stake.

Power-ups you unlock

Programmable: runs smart contracts
Turing-complete virtual machine (EVM)
Platform for tokens, DeFi, NFTs, DAOs
ETH = asset + gas; PoS since 2022

Double-Spend Dan attacks — common mistakes

Thinking Ethereum is "just a coin"
Confusing ETH the asset with the network
Assuming contracts can be changed after deploy (usually not)

Boss battleName three application categories Ethereum enabled that Bitcoin didn’t.

Example code

<!doctype html><html><head><meta charset="utf-8"></head>
<body style="background:#06040d;color:#e6e0ff;font-family:monospace;padding:20px"><pre>Bitcoin: money
Ethereum: money + programs (smart contracts)
→ DeFi, NFTs, DAOs, tokens</pre></body></html>

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