Emin Gun Sirer is a Cornell University computer science professor who has been deeply involved in the Bitcoin and Ethereum communities from the very early days. We talk about how he got started in the field, building a cryptocurrency long before Bitcoin. Gun, as friends call him, then turned his attention to Ethereum, notably catching the bug in The DAO, but failing to alert the community about it.

After years scrutinizing existing blockchains, he’s back at making one himself with AVA, whose testnet launched two weeks ago. He explains the inner workings of this network, the first built over the Avalanche protocol, and how it can process several thousands of transactions per second at latencies of under one second.

He also talks about his plans to release a subnetwork called Athereum shortly after the AVA mainnet launches in July. Athereum will be almost identical to Ethereum; it will replicate its smart contracts and assets, and ETH holders will hold the equivalent amount of ATH. Sirer says the intention is for Athereum to serve as a safety net in case something goes wrong with ETH 2.0. If this sounds like Ethereum’s old friend wants to bring on some serious competition to the second-biggest chain, that’s because he is. Still, he’s quick to highlight he wants Ethereum to succeed and that he’s not after Ethereum dollars, but rather after money flows that are outside of Ethereum.