Hackathon winner Sheetcoin offers an Ethereum wallet on Google Sheets

The winner of this year's Ethereum hackathon, Sheetcoin, is a bold project that turned Google Sheets into an Ethereum wallet, enabling users to send ERC20 tokens to any Gmail address directly from their browser.

The project, which is essentially a Google Sheets sidechain, secures the transactions with OAuth.

Google Sheets Ethereum wallet wins this year's hackathon.

This year's ETHWaterloo, an Ethereum hackathon took place last week and saw 65 different projects submitted.

According to the organizers of the Toronto-based event, this brings the number of Ethereum hackathon projects to over 1,000.

The most famous project that has come out of an Ethereum hackathon is CryptoKitties, an Ethereum collectibles game that notoriously jammed the network due to incredibly high traffic.

Humorously called Sheetcoin, the hackathon winner is based on an ambitious idea-turning Google Sheets into an Ethereum wallet.

Developers behind Sheetcoin built a Google Sheets sidechain on Ethereum, enabling users to send ERC20 tokens to any Gmail address.

Received tokens can then be withdrawn to any cryptocurrency wallets, Sheetcoin is "Fully connected" to Ethereum.

DeFi Custody Wallet, another highly rated hackathon entry, is a smart contract that introduced a "Dead man switch." The mechanism sends all of the funds in a wallet to a predetermined address if the wallet isn't used for a predetermined amount of time.