Blockchains using smart contracts, such as Avalanche or EthereumSecond most important crypto asset by market capitalization. Ethereum blockchain has been launched
in 2015 by Vitalik Buterin, it is also used for other applications such as DeFi and NFTs., have several tokens, so is gas. Gas is used
to pay transaction feesFees related to operations; they sometimes are distributed to miners. or to carry out smart contractComputer protocol executed by predefined conditions (« if…then »). A smart contract can be automatically executed with digital tools, allowing real time check of the contract’s conditions. operations.