Ethereum and the creation of ERC-20 tokens.

On July 30, 2015, the Ethereum network was launched. Currently the second crypto asset by market capitalization, it has brought smart contracts and then decentralized finance to the cryptocurrency world. They allow the Ethereum blockchain to run an entire ecosystem on its blockchain while also hosting its native currency: Ether. The smallest unit of ether also known as wei (0.000,000,000,000,000,000,001 ETH. .

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