The denomination used in defining the cost of gas in transactions involving Ether. Gwei is a small unit of the Ethereum network’s Ether (ETH) cryptocurrency. A gwei or gigawei is defined as 1,000,000,000 wei, the smallest base unit of Ether. One gwei equals 0.000000001 or 10-9 ETH. Conversely, 1 ETH represents 1 billion gwei!
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